WO2013100208A1 - 角膜内皮細胞の培養正常化 - Google Patents
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Definitions
- the present invention relates to a technique and method for culturing corneal endothelial cells in a normal state, and a drug and a medium therefor.
- Visual information is transmitted from the cornea, the transparent tissue in the foreground of the eyeball, to reach the retina and excite the neurons in the retina. To be recognized.
- the cornea needs to be transparent.
- the transparency of the cornea is maintained by keeping the water content constant by the pump function and the barrier function of corneal endothelial cells.
- Human corneal endothelial cells exist at a density of about 3000 cells per square millimeter at birth, but do not have the ability to regenerate once damaged.
- bullous keratopathy caused by corneal endothelial degeneration or corneal endothelial dysfunction due to various causes, the cornea becomes edema and turbidity, resulting in a significant loss of visual acuity.
- full-thickness corneal transplantation is performed in which all three layers of the corneal epithelium, parenchyma and endothelium are transplanted.
- the cornea donation in Japan is insufficient, and the number of corneal transplants performed in Japan is about 1700 per year for about 2600 waiting patients for corneal transplantation.
- corneal transplantation in which only damaged tissues are transplanted, has attracted attention.
- deep surface corneal transplantation which is transplantation of parenchymal tissue
- Descemet's Stripping Automated Endothelial Keratoplasty which is transplantation of corneal endothelial tissue
- cultured mucosal epithelial transplantation that transplants corneal epithelium or oral mucosa cultured in vitro instead of corneal epithelium has already been clinically applied, and a method of transplanting corneal endothelium cultured in vitro is also being studied. Yes.
- a corneal endothelium-like sheet comprising a corneal endothelium layer cultured on a collagen layer
- Patent Document 1 a corneal endothelial cell, especially corneal endothelial cells derived from humans, are limited in the number of donors of the cornea and are difficult to culture in vitro, and it takes time and money to obtain the number of cultured cells necessary for transplantation. It is necessary.
- ES cells Human embryonic stem (ES) cells have high self-renewal ability and pluripotency, and are attracting attention from the viewpoint of medical application, but because cell death easily occurs by the operation of dispersing cells in the culture process, There was a practical problem that the number of cells was significantly impaired. In recent years, it has been found that cell death that occurs when human ES cells are cultured is caused by activation of Rho kinase (ROCK), and that cell death is greatly suppressed by inhibition of ROCK. It has been reported that large-scale culture of human ES cells and production of cerebral cells using Y-27632 or the like can be performed (Non-patent Document 1). Therefore, the present inventors disclosed a method for mass culture of corneal endothelial cells using Y-27632 or the like (Patent Document 2).
- ROCK Rho kinase
- Patent Document 3 discloses a neurosphere method using corneal endothelial progenitor cells.
- Patent Document 4 discloses the use of a TGF- ⁇ kinase inhibitor and a p38 MAPK inhibitor for culturing epithelial cells.
- Non-Patent Documents 2 and 4 describe the involvement of TGF- ⁇ , p38 MAPK, and Smad in specific severe corneal endothelial diseases.
- Non-Patent Document 3 describes a perspective on the proliferation of human corneal endothelial cells using ROCK inhibitors.
- Non-Patent Document 5 shows that fibrosis during severe injury of the cornea is due to activation of p38 MAPK by IL-1 ⁇ .
- Non-Patent Document 6 shows that the fibrosis observed during excessive freezing trauma in rabbits can be suppressed with an inhibitor by activation of p38 MAPK using rabbits.
- Non-Patent Document 7 describes that a conventional corneal endothelial cell culture medium cannot be proliferated while maintaining a normal state when subcultured.
- Non-Patent Document 8 discloses a medium for corneal endothelial cells. This medium contains FBS, EGF and NGF, but it is described that cells to be cultured in this medium cannot be cultured well unless they are derived from young organisms.
- Non-Patent Document 9 discloses a medium for corneal endothelial cells using basic FGF.
- Non-Patent Document 10 discloses a corneal endothelial cell lysis medium using collagenase.
- Non-Patent Document 11 discloses a corneal endothelial cell lysis medium using a conditioned medium.
- Non-Patent Documents 8 to 11 Various media have been developed as in Non-Patent Documents 8 to 11, but as shown in Non-Patent Document 7, the conventional corneal endothelial cell culture medium can be grown while maintaining a normal state when subcultured. It is known that it cannot.
- Non-patent documents 12 to 14 also describe the production of cultured corneal endothelial sheets.
- Non-patent documents 9 to 12 and 15 disclose human ocular tissue-derived stem cells and autologous corneal endothelial transplantation.
- Non-patent documents 16 and 17 also describe the production of cultured corneal endothelial sheets.
- the present inventors have found a technique capable of proliferating corneal endothelial cells while maintaining normal function by inhibiting the tumor necrosis factor ⁇ (TGF- ⁇ ) pathway. As a result, corneal endothelial cells having normal functions can be grown in a relatively large amount. That is, the present invention provides the following. (1) A culture normalizing agent for corneal endothelial cells containing a fibrosis inhibitor. (2) The culture normalizing agent according to item 1, wherein the fibrosis inhibitor comprises a transforming growth factor (TGF) ⁇ signal inhibitor. (3) The culture normalizing agent according to item 1 or 2, wherein the culture normalization includes a normal cell function selected from the group consisting of ZO-1 and Na + / K + -ATPase.
- TGF tumor necrosis factor
- the TGF- ⁇ signal inhibitor is SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl)]-1H-imidazol-2-yl] benzamide), BMP-7, anti-TGF- ⁇ antibody, anti-TGF- ⁇ receptor antibody, TGF- ⁇ siRNA, TGF- ⁇ receptor siRNA, TGF- ⁇ antisense oligonucleotide, 6,7-dimethoxy-2-((2E ) -3- (1-Methyl-2-phenyl-1H-pyrrolo [2,3-b] pyridin-3-yl-prop-2-enoyl))-1,2,3,4-tetrahydroisoquinolone, A83 -01 (3- (6-methyl-2-pyridinyl) -N-phenyl-4- (4-quinolinyl) -1H-pyrazole-1-carbothioamide), Stemolecule TM TLK Inhibitor (2- (3- (6-methylpyri
- the culture normalizing agent according to any one of items 2 to 7, comprising at least one solvate of a pharmaceutically acceptable salt thereof.
- the TGF- ⁇ signal inhibitor is SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl)]-1H-imidazol-2-yl] benzamide), BMP-7, anti-TGF- ⁇ antibody, anti-TGF- ⁇ receptor antibody, TGF- ⁇ siRNA, TGF- ⁇ receptor siRNA, TGF- ⁇ antisense oligonucleotide, A83-01 (3- (6-methyl- 2-pyridinyl) -N- phenyl-4- (4-quinolinyl)-1H-pyrazole-1-carbothioamide), stearyl leakage CURE TM TLK inhibitor (2- (3- (6-methylpyridin-2-yl) - 1H- pyrazol-4-yl) -1,5-naphthyridine), stearyl leakage C
- the TGF- ⁇ signal inhibitor is SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl) -1H-imidazol-2-yl] benzamide) or its Item 9.
- the MAP kinase inhibitor is SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine) or a pharmaceutically acceptable salt thereof.
- the culture normalizing agent according to Item 10 comprising a suitable salt.
- the aging inhibitor includes SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine). Culture normalizing agent.
- SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl) -1H-imidazol-2-yl] benzamide) and SB203580 (4- [4- (4 -Fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine) or a pharmaceutically acceptable salt thereof, items 1-8, 8A, 9, 9A, 9B , 9C, 9D, 9E, 10 or 11 to 14, the culture normalizing agent.
- the culture normalizing agent according to any one of items 1 to 8, 8A, 9, 9A, 9B, 9C, 9D, 9E, 10 or 11 to 15, further comprising a cell adhesion promoter.
- the cell adhesion promoter is (R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide or a pharmaceutically acceptable salt thereof (for example, Y-
- the culture normalizing agent according to Item 16 comprising 27632 (R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate).
- the fibrosis inhibitor is always present during the culturing of the corneal endothelial cells, while the adhesion promoter is allowed to exist for a certain period of time, and then the adhesion promoter is once depleted, and then the cell adhesion is repeated.
- Item 18 The culture normalizing agent according to Item 16 or 17, wherein the promoter is present for a certain period.
- the cell for transplant is any one of items 4 to 8, 8A, 9, 9A, 9B, 9C, 9D, 9E, 10 and 11 to 19 for preventing or treating corneal endothelial injury
- Corneal endothelial cells comprising the culture normalizing agent according to any one of items 1 to 8, 8A, 9, 9A, 9B, 9C, 9D, 9E, 10 or 11 to 20 and a culture component of corneal endothelium A medium for culturing normally.
- a method of normally culturing corneal endothelial cells comprising a step of culturing cells.
- a corneal endothelial cell preservation solution comprising the culture normalizing agent according to any one of items 1 to 8, 8A, 9, 9A, 9B, 9C, 9D, 9E, 10 and 11 to 20.
- the medicament according to item 25, wherein the treatment or prevention is for primate corneal endothelium.
- the cell adhesion promoter is (R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide or a pharmaceutically acceptable salt thereof (for example, Y-
- a cell adhesion promoter comprises a Rho kinase inhibitor.
- the cell adhesion promoter is (R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide or a pharmaceutically acceptable salt thereof (for example, Y-
- the pharmaceutical according to Item 35 or 35A which is 27632 (R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate)).
- the medicine comprises the culture normalizing agent according to any one of items 1 to 8, 8A, 9, 9A, 9B, 9C, 9D, 9E, 10 or 11 to 20, or the medium according to item 21.
- the medicament according to item 35, 35A or 36 which is used together with a corneal endothelial cell produced by a method for normally culturing corneal endothelial cells, comprising a step of culturing corneal endothelial cells.
- a method for the treatment or prevention of a human corneal endothelial disease, disorder or condition comprising the step of administering a cell adhesion promoter to a subject in need of treatment or prevention.
- 39A A method according to item 39, wherein the method has at least one of the characteristics according to any one of items 35A and 36 to 38.
- the present invention provides a technique capable of proliferating corneal endothelial cells while maintaining normal functions that have been difficult to achieve in the past.
- Normal functions include biochemical functions of corneal endothelial cells such as ZO-1 and Na + / K + -ATPase, transplantation ability to primates, etc., and include functions for realizing corneal transplantation. .
- FIG. 1 shows morphological changes when cynomolgus monkeys and human cells are cultured by a conventional method.
- the upper side shows cynomolgus monkeys and the lower side shows humans.
- Cynomolgus monkey is DMEM + 10% FBS + 2 ng / ml basic FGF
- human is Opti-MEM I Reduced-Serum Medium, Liquid + 8% FBS + 200 mg / ml CaCl 2 ⁇ 2H 2 O + 0.08% chondroitin sulfate + 20 ⁇ g / ml Ascorbic acid + 50 ⁇ g / ml It is a culture result on condition of EGF.
- the left shows the morphology of normal corneal endothelium, but morphological changes easily occur as shown on the right by long-term culture or subculture.
- FIG. 2 shows that normal function is lost when cultured with the prior art.
- the left panel shows the results of immunostaining.
- the left side shows monkey corneal endothelial cells (MCECs) that can be cultured in a normal form, and the right side shows MCECs that have undergone a fibroblast-like shape change by long-term culture.
- the upper side of the left panel shows staining with ZO-1, and the lower side shows staining with Na + / K + -ATPase.
- the upper right panel shows the results of the Western blot.
- the lower right panel shows the results of real-time PCR analysis.
- FIG. 2A shows that fibroblast primate corneal endothelial cells (CEC) produce an abnormal extracellular matrix, ie, lose normal function when cultured in the prior art.
- CEC fibroblast primate corneal endothelial cells
- the left side shows the normal cell phenotype and the right side shows the fibroblast phenotype.
- the fibroblast phenotype showed an excess of extracellular matrix such as fibronectin and collagen type 1.
- the normal cell phenotype completely lost staining ability.
- (B) Western blot of protein expression in fibronectin fibroblast phenotype and normal cell phenotype. GAPDH is a control. Fibronectin protein expression levels were strongly up-regulated in the fibroblast phenotype than in the normal phenotype.
- C Semi-quantification of collagen type 1, type 4, type 8 fibronectin, integrin ⁇ 5, and integrin ⁇ 1 (listed in order from the top) in fibroblast phenotype (right) and normal cell phenotype (left). The result of PCR is shown. GAPDH is a control.
- type 1 collagen transcript ( ⁇ 1 (I) mRNA) was abundantly expressed in the fibroblast phenotype, whereas in the normal phenotype, ⁇ 1 (I) mRNA expression was It was decreasing.
- FIG. 3 shows fibrosis with the conventional method.
- the conditioned medium for 3T3 feeder cells suppresses fibroblastic transformation (transformation) (middle), but shows that it is still transformed when subcultured (right).
- FIG. 4 is a diagram showing that the Smad pathway, the p38 MAPK pathway, and the JNK pathway are activated in the fibrotic cells of monkey corneal endothelial cells.
- the left shows normal forms of monkey corneal endothelial cells (MCEC), and the right shows MCECs that have undergone morphological changes like fibroblasts.
- FIG. 5 shows that the transformation of monkey corneal endothelium could be suppressed by inhibiting the TGF- ⁇ signal with a receptor phosphorylation inhibitor.
- the left shows that the corneal endothelium of cynomolgus monkey was cultured in DMEM + 10% FBS + 2 ng / ml basic FGF (also referred to as a normal medium in the present specification), and the corneal endothelium changed its shape like a fibroblast.
- FIG. 6 shows that TGF- ⁇ signal inhibition suppresses loss of function-related protein due to fibrosis of monkey corneal endothelial cells.
- the left side shows the MCEC that has undergone cynomolgus monkey corneal endothelium culturing with DMEM + 10% FBS + 2 ng / ml basic FGF (normal medium).
- the immuno-staining image by the function related marker ZO-1 (upper side) and Na ⁇ + > / K ⁇ + > - ATPase (lower side) is shown.
- the upper right panel shows the results of the Western blot.
- the lower right panel shows the results of real-time PCR analysis.
- FIG. 7 is a diagram showing that TGF- ⁇ is added to induce transformation and loss of function-related proteins in order to confirm that the TGF- ⁇ signal is involved in the transformation of monkey corneal endothelium.
- the upper side shows control MCEC, and the lower side shows the result of cells treated with TGF- ⁇ .
- FIG. 8 is a diagram showing that monkey corneal endothelial cells become fibrotic and morphologically change due to TGF- ⁇ and lose function-related proteins. The change with the dose of TGF- ⁇ is shown (the left panel shows 0 ng / ml, 1 ng / ml, 3 ng / ml, 10 ng / ml, 30 ng / ml from the left.
- FIG. 9 is a diagram showing that, even in human corneal endothelium, it is possible to suppress transformation and inhibit normal endothelium by inhibiting the TGF- ⁇ signal with a receptor phosphorylation inhibitor.
- the left is a control (normal medium), and the right shows the result of staining with SB431542.
- SB431542 maintains the function of human corneal endothelial cells (HCEC) and suppresses fibroblast-like changes in human corneal endothelial cells (A, B).
- HCEC human corneal endothelial cells
- A, B human corneal endothelial cells
- the left shows human corneal endothelial cells cultured in a normal medium
- the right shows that cultured in a medium in which SB431542 is added to the normal medium at a concentration of 1 ⁇ M.
- Blocking TGF receptor signaling by SB431542 allowed Na + / K + -ATPase and ZO-1 to be subcellularly localized at the cell membrane and maintained their protein expression.
- the scale bar indicates 100 ⁇ m.
- C shows an ELISA assay.
- the concentration of collagen type 1 when SB431542 is added or not is shown as the concentration in the cell supernatant.
- An ELISA assay showed that SB431542 significantly downregulated the secretion of collagen type 1 into the cell supernatant. ** P ⁇ 0.05.
- D, E shows quantitative PCR.
- FIG. 5 shows that SB431542 significantly reduces collagen type 1 and fibronectin expression at the mRNA level. * P ⁇ 0.01, ** P ⁇ 0.05.
- FIG. 10 is a diagram showing that a method other than SB431542 could antagonize the TGF- ⁇ signal and suppress the transformation of human corneal endothelium. The upper result shows the result with a phase contrast microscope.
- the lower side shows the results of phalloidin staining (green staining (the network around the cell is phalloidin, and the red staining (particulate) is PI.)
- the left side is Opti-MEM.
- FIG. 10A shows the result of examining the effect of each concentration of BMP-7, which is shown in FIG.
- BMP7 suppresses the change of human corneal endothelial cells to fibroblast-like and maintains its function.
- A It is a photograph of a phase contrast microscope. The upper left is a control without BMP-7 (displayed as Control). Upper left is 10 ng / mL, lower right is 100 ng / mL, lower left is 1000 ng / mL BMP-7.
- the elongated cell shape of the fibroblast phenotype was converted to a polygonal cell shape in response to the presence of BMP-7 in a concentration-dependent manner.
- the scale bar is 100 ⁇ m.
- the scale bar is 100 ⁇ m.
- C) and (D) are photographs of Na + / K + -ATPase and ZO-1 staining, respectively.
- the upper left is a control without addition of BMP-7.
- Upper left is 10 ng / mL
- lower right is 100 ng / mL
- lower left is 1000 ng / mL
- BMP-7 maintained the intracellular localization of Na + / K + -ATPase and ZO-1 in the cell membrane.
- the scale bar is 100 ⁇ m.
- (E) is a graph showing the ratio of Na + / K + -ATPase positive cells (E) and ZO-1 positive cells (F) when cultured using three concentrations of control and BMP-7. is there. No control is added. Both Na + / K + -ATPase positive cells and ZO-1 positive cells were significantly increased in proportion compared to controls when treated with BMP-7.
- FIG. 11 shows that when an inhibitor of p38 MAPK is used in addition to SB431542, p38 MAPK inhibition + TGF- ⁇ signal inhibition enables culturing with corneal endothelial cells retaining high density even after repeated passages.
- FIG. The upper left is the control (indicated as a normal medium in the figure), and the upper right is the result with only SB431542.
- the lower left is a result with only SB203580, and the lower right is a diagram showing the results with both SB431542 and SB203580.
- FIG. 12 is an example of a standard culture method for human corneal endothelial cells established in the present invention.
- the upper panel shows a schematic diagram of subculture, and shows schematic diagrams of culture methods 1 to 3 carried out in Example 8.
- SB203580 and SB431432 are present.
- Culture method 1 is a method in which Y-27632 is allowed to exist for 48 hours, then once deleted, and then added again. In the culture method 2, Y-27632 is always present together. In culture method 3, Y-27632 is not present.
- the result in the human corneal endothelial cell culture finally established is shown. As shown in the photograph on the left, it is understood that fibrosis is suppressed and proliferation is also smooth.
- Example 9 it is shown that transparent corneal healing can be obtained by culturing human corneal endothelial cells cultured while maintaining their functions in a normal form on a collagen sheet and transplanting them into a cynomolgus monkey bullous keratopathy model.
- the left side shows the result of transplanting only the cells cultured by the culture method of the present invention
- the right side shows the result when Y-27632, which is a ROCK inhibitor, was injected at the time of transplantation of the cells cultured by the culture method of the present invention. .
- Example 9 after euthanization after 2.5 months, the cornea was removed and the tissue was fixed, and then immunostaining was performed for phalloidin and Na + / K + -ATPase and ZO-1 in the same manner as in Example 2.
- photographed with the fluorescence microscope is shown.
- the upper row shows the result of the cell + ROCK inhibitor, and the lower row shows the result of the cell alone.
- phalloidin primary color is green, on the gray scale, it is meshed on the upper side and appears to be diffused on the lower side
- DAPI primary color is blue.
- the number is reduced compared to the upper side, showing staining of the phalloidin stain, and the center is ZO-1 (primary color is green. In the lower part, it appears to remain partly in the upper left and lower right.)
- DAPI primary color is blue.
- the gray scale the inside of the cell is stained in the form of particles, and in the lower part, the particulate staining disappears and becomes light.
- the right side is Na + / K + -ATPase (the primary color is green.
- the gray scale is mesh-like on the upper side and the lower side is partially left in the center)
- DAPI primary color is blue.
- FIG. 16 shows normalization of culture in the case of using the anti-TGF- ⁇ neutralizing antibody performed in Example 10. The left shows the results with the normal medium, and the right shows the results with the anti-TGF- ⁇ neutralizing antibody.
- FIG. 17 shows 6,7-dimethoxy-2-((2E) -3- (1-methyl-2-phenyl-1H-pyrrolo [2, sold by Calbiochem, an Smad3 inhibitor used in Example 11).
- Fibrosis inhibitor refers to any drug that inhibits fibrosis.
- Fibrosis inhibitors used in the present invention include transforming growth factor (TGF) - ⁇ signal inhibitor, mitogen-activated protein kinase (MAPK) 38 inhibitor, interleukin (IL) -12, Examples thereof include cytokines known to have an antifibrotic effect, such as IL-10, interferon (IFN) - ⁇ , or BMP-7 (OP-1). Information on such cytokines and the like can be obtained from public databases such as GenBank and magazine publications.
- the present invention achieves a significant increase in corneal endothelial cells, which conventionally had difficulty in proliferating cells with normal function, by suppressing fibrosis. I was able to. Therefore, it is understood that any agent can be used as the fibrosis inhibitor used in the present invention as long as it causes proliferation of cells having normal functions.
- IFN- ⁇ polypeptides can be used to treat human diseases, but generally human proteins are used for human corneal endothelial cells.
- Human IFN- ⁇ coding sequences can be found in GenBank accession numbers P01579 and CAA00375.
- Corresponding genomic sequences can be found in GenBank accession numbers J00219, M37265, and V00536.
- a calcium channel blocker such as verapamil can be used as a fibrosis inhibitor.
- fibrosis inhibitors can have an antifibrotic effect by stimulating the degradation of collagen type I fibers as well as the ability to reduce collagen type I synthesis.
- In vitro tests on fibroblasts show that the extracellular transport of collagen depends on the presence of calcium.
- Verapamil a calcium channel blocker, decreases intracellular calcium levels and increases collagenase activity. It also inhibits fibroblast proliferation.
- transforming growth factor- ⁇ transformed growth factor- ⁇ ; also abbreviated as TGF- ⁇
- TGF- ⁇ transformed growth factor- ⁇
- TGF- ⁇ is produced as an inactive latent type having a molecular weight of about 300 kD that cannot bind to the receptor, and is activated on the surface of the target cell and its surroundings to become an active type that can bind to the receptor and exerts its action.
- TGF- ⁇ in the target cell is transmitted by a series of protein phosphorylation pathways responsible for information transmission called Smad.
- Smad protein phosphorylation pathways responsible for information transmission.
- a receptor complex consisting of two type II receptor molecules and two type I TGF- ⁇ receptor molecules is formed. Phosphorylates type I receptors.
- phosphorylated type I receptor phosphorylates Smad2 or Smad3
- phosphorylated Smad2 and Smad3 form a complex with Smad4 and move to the nucleus, and are called CAGA boxes that exist in the target gene promoter region. It is said to bind to the target sequence and induce transcriptional expression of the target gene together with the coactivator.
- TGF- ⁇ The transforming growth factor- ⁇ signaling pathway is regulated by many target cells, such as cell proliferation and differentiation, growth arrest, apoptosis, and epithelial-mesenchymal transdifferentiation (EMT).
- EMT epithelial-mesenchymal transdifferentiation
- the activity can be modulated.
- TGF- ⁇ family including TGF- ⁇ itself (eg, TGF- ⁇ 1, TGF- ⁇ 2 and TGF- ⁇ 3), activin and bone morphogenetic protein (BMP) are cell proliferation, differentiation, migration and apoptosis It is a powerful regulator.
- TGF- ⁇ is an approximately 24 Kd protein produced by many cells, including B lymphocytes, T lymphocytes and activated macrophages, and by many other cell types.
- TGF- ⁇ effects of TGF- ⁇ on the immune system are IL-2 receptor induction, inhibition of IL-1-induced thymocyte proliferation, and blockade of IFN- ⁇ -induced macrophage activation.
- TGF- ⁇ is thought to be involved in a variety of pathological conditions (Border et al. (1992) J. Clin. Invest. 90: 1) and functions as either a tumor suppressor or tumor promoter. Is well supported.
- TGF- ⁇ mediates its signaling by two serine / threonine kinase cell surface receptors, TGF- ⁇ RII and ALK5.
- TGF- ⁇ signaling is initiated by ligand-induced receptor dimerization that allows TGF- ⁇ RII to phosphorylate the ALK5 receptor.
- the phosphorylation activates ALK5 kinase activity, which in turn activates downstream effector Smad protein (vertebrate homologue of MAD, or “Mothers against DPP” protein), Smad2 or 3 Is phosphorylated.
- Smad protein verebrate homologue of MAD, or “Mothers against DPP” protein
- Smad2 or 3 Is phosphorylated The p-Smad2 / 3 complex with Smad4 enters the nucleus and activates transcription of the target gene.
- Smad3 is a member of the R-Smad (receptor-activated Smad) subgroup of Smad and is a direct mediator of transcriptional activation by the TGF- ⁇ receptor.
- TGF- ⁇ stimulation results in phosphorylation and activation of Smad2 and Smad3, which form a complex with Smad4 (“common Smad” or “co-Smad” in vertebrates), which together with the nucleus Accumulate and regulate transcription of target genes.
- R-Smad localizes in the cytoplasm and, upon ligand-induced phosphorylation by the TGF- ⁇ receptor, forms a complex with co-Smad and translocates to the nucleus where they are chromatin and synergistic Regulates gene expression associated with transcription factors.
- Smad6 and Smad7 are inhibitory Smads (“I-Smad”), ie, are transcriptionally induced by TGF- ⁇ and function as inhibitors of TGF- ⁇ signaling (Feng et al. (2005) Annu. Rev. Cell. Dev.Biol.21: 659).
- Smad6 / 7 exerts their inhibitory effects by preventing receptor-mediated activation of R-Smad; they are associated with type I receptors that competitively prevent R-Smad mobilization and phosphorylation.
- Smad6 and Smad7 are known to recruit E3 ubiquitin ligases that result in ubiquitination and degradation of Smad6 / 7 interacting proteins.
- TGF- ⁇ signaling pathway In addition to the TGF- ⁇ signaling pathway, there are also pathways transmitted by BMP-7, etc., which function via ALK-1 / 2/3/6 and via Smad1 / 5/8. It is supposed to be expressed.
- TGF- ⁇ signaling pathway see J.A. Massagu'e, Annu. Rev. Biochem. 1998.67: 753-91; Vilar JMG, Jansen R, Sander C (2006) PLoS Compute Biol 2 (1): e3; , Abraham, D .; J. et al. FASEB J. 18, 816-827 (2004); Coert Margadand & Arnaud Sonnenberg EMBO reports (2010) 11, 97-105; Joel Rosenblum et al. , Ann Internet Med. 2010; 152: 159-166 etc.
- TGF- ⁇ signal inhibitor refers to any factor that inhibits TGF signaling.
- TGF- ⁇ transforming growth factor
- antagonizing TGF- ⁇ it may be referred to as an antagonist, but when referring to the present invention, a TGF- ⁇ antagonist is included in a TGF- ⁇ signal inhibitor.
- the TGF- ⁇ signal inhibitor used in the present invention includes, but is not limited to, an antagonist of TGF- ⁇ , an antagonist of a receptor of TGF- ⁇ , or an inhibitor of Smad3.
- TGF- ⁇ signal inhibitors that can be used in the present invention include SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl)]-1H-imidazole-2. -Yl] benzamide), BMP-7, anti-TGF- ⁇ antibody, anti-TGF- ⁇ receptor antibody, TGF- ⁇ siRNA, TGF- ⁇ receptor siRNA, TGF- ⁇ antisense oligonucleotide, 6,7-dimethoxy -2-((2E) -3- (1-methyl-2-phenyl-1H-pyrrolo [2,3-b] pyridin-3-yl-prop-2-enoyl))-1,2,3,4 -Tetrahydroisoquinolone, A83-01 (3- (6-methyl-2-pyridinyl) -N-phenyl-4- (4-quinolinyl) -1H-pyrazole-1-carbothioamide), Morekyuru TM TLK inhibitor (2-
- TGF- ⁇ signal inhibitors include monoclonal and polyclonal antibodies against one or more isoforms of TGF- ⁇ (US Pat. No. 5,571,714; WO 97/13844 and WO No. 00/66631), TGF- ⁇ receptors, soluble forms of such receptors (eg, soluble TGF- ⁇ type III receptor), or antibodies directed against TGF- ⁇ receptors (US Pat. 693,607, US Pat. No. 6,001,969, US Pat. No. 6,010,872, US Pat. No. 6,086,867, US Pat. No.
- a TGF- ⁇ inhibitor can be a TGF- ⁇ antagonist, a human or humanized monoclonal antibody that blocks TGF- ⁇ binding to its receptor (or F (ab) 2 fragment, Fv fragment, single chain antibody, And other forms of antibodies or fragments thereof such as fragments that retain the ability to bind to TGF- ⁇ .
- TGF- ⁇ receptors and TGF- ⁇ binding fragments of TGF- ⁇ receptors, especially soluble fragments, are useful TGF- ⁇ antagonists in the methods of the invention.
- preferred inhibitors of TGF- ⁇ function include soluble TGF- ⁇ receptors, especially, for example, the extracellular domain of TGBIIIR or TGFBIIIR, preferably a recombinant soluble TGF- ⁇ receptor (rsTGFBIIR or rsTGFBIIIR), TGF- ⁇ type II receptor (TGBIIIR) or TGF- ⁇ type III receptor (TGFBIIIR or beta glycan).
- TGF- ⁇ receptors and TGF- ⁇ binding fragments of TGF- ⁇ receptors, especially soluble fragments, are useful TGF- ⁇ antagonists in the methods of the invention.
- TGF- ⁇ receptors and the nucleic acids that encode them are well known in the art. Nucleic acid sequences encoding TGF- ⁇ 1 type receptors are disclosed in GenBank Accession No. L15436 and US Pat. No. 5,538,892 (Donahoe et al.). The nucleic acid sequence of the TGF- ⁇ type 2 receptor is publicly available under GenBank accession numbers AW236001, AI35790, AI279787, AI074706, and AA808255. The nucleic acid sequence of the TGF- ⁇ 3 type receptor is also publicly available under GenBank accession numbers NM003243, AI887852, AI817295, and AI681599.
- TGF- ⁇ signal inhibitors or antagonists and methods for their production are well known in the art, along with more currently under development.
- the specific TGF- ⁇ signal inhibitor or antagonist used is not of a limiting character, as any effective TGF- ⁇ antagonist can be useful in the methods of the invention.
- Examples of such antagonists include monoclonal and polyclonal antibodies against one or more isotypes of TGF- ⁇ (US Pat. No. 5,571,714 and WO 97/13844), TGF- ⁇ receptor, fragments thereof , Derivatives thereof, and antibodies against the TGF- ⁇ receptor (US Pat. Nos.
- antagonists include somatostatin (WO 98/08529), mannose-6-phosphate or mannose-1-phosphate (US Pat. No. 5,520,926), prolactin (WO 97/926). 40848), insulin-like growth factor II (WO 98/17304), IP-10 (WO 97/00691), arginine (arg) -glycine (gly) -aspartic acid (asp) -containing peptide (US Pat. 958,411 and WO 93/10808), extracts of plants, fungi and bacteria (European Patent Application No. 813875, JP-A-8-119984 and US Pat. No.
- Suitable TGF- ⁇ antagonists for use in the present invention are also functional variants, mutants of the aforementioned TGF- ⁇ antagonists as long as their ability to inhibit the amount or activity of TGF- ⁇ is retained.
- Derivatives and analogs are also included.
- variants “derivatives”, and “analogs” are molecules that have a similar shape or structure to the parent compound and retain the ability to act as a TGF- ⁇ antagonist. Point to.
- any of the TGF- ⁇ antagonists disclosed herein may be crystallized, and useful analogs can be rationalized based on the coordinates responsible for the active site shape (s). Can be engineered.
- TGF- ⁇ antagonist is a polypeptide
- polypeptide fragments and variants can be produced to increase ease of delivery, activity, half-life, etc. (eg, humanized as discussed above).
- Antibody or functional antibody fragment Given the level of skill in the art of synthetic and recombinant polypeptide production, such variants may be achieved without undue experimentation.
- One skilled in the art may also design novel inhibitors based on knowledge of the crystal structure and / or active site of the TGF- ⁇ inhibitors described herein.
- Polypeptide inhibitors such as the soluble TGF- ⁇ receptor can also be effectively introduced via gene transfer.
- certain embodiments of the methods of the invention include the use of a suitable vector for expression of a TGF- ⁇ receptor or binding partner, preferably a soluble receptor or soluble binding partner.
- administration of a soluble TGF- ⁇ antagonist comprises: a cDNA encoding a soluble antagonist; or a cDNA encoding the extracellular domain of a TGF- ⁇ type II receptor (rsTGBIIIR) or a TGF- ⁇ type III receptor (rsTGFBIIIR).
- a vector comprising, which causes in situ expression of a soluble TGF- ⁇ antagonist in cells transfected with the vector, inhibits the activity of TGF- ⁇ , Inhibits TGF- ⁇ mediated fibrosis.
- Any suitable vector can be used.
- Preferred vectors include adenoviral vectors, lentiviral vectors, Epstein Barr virus (EBV) vectors, adeno-associated virus (AAV) vectors, and retroviral vectors developed for gene transfer purposes.
- ESV Epstein Barr virus
- AAV adeno-associated virus
- Other non-vector methods of gene transfer such as lipid / DNA complexes, protein / DNA conjugates, naked DNA transfer methods, etc. can also be used.
- a further suitable TGF- ⁇ antagonist developed for delivery via adenovirus gene transfer is a chimeric cDNA (Isaka et al.) Encoding the extracellular domain of the TGF- ⁇ type II receptor fused to the Ig Fc domain. , 1999, Kidney Int., 55: pp. 465-475), adenoviral gene transfer vector of dominant negative mutant of TGF- ⁇ type II receptor (Zhao et al., 1998, Mech. Dev., 72: pp. 89-100), and adenovirus gene transfer vector of decorin which is a TGF- ⁇ binding proteoglycan (Zhao et al., 1999, Am. J. Physiol., 277: pp. L412 to L422), but is not limited thereto. Not . Adenovirus-mediated gene transfer is very efficient compared to other gene delivery modalities.
- TGF- ⁇ receptors and TGF- ⁇ binding fragments, soluble fragments, etc. of TGF- ⁇ receptors are TGF- ⁇ antagonists useful in the present invention.
- TGF- ⁇ receptors and the nucleic acids that encode them are well known in the art. Nucleic acid sequences encoding TGF- ⁇ type 1 receptors are disclosed in GenBank accession number L15436 and Donahoe et al. US Pat. No. 5,538,892. The nucleic acid sequence of the TGF- ⁇ type 2 receptor is publicly available under GenBank accession numbers AW236001; AI35790; AI279787; AI074706; and AA808255.
- the nucleic acid sequence of the TGF- ⁇ 3 type receptor is also publicly available under GenBank accession numbers NM003243; AI888852; AI817295; and AI681599.
- the TGF- ⁇ antagonist is its receptor, or F (ab) 2 fragment, Fv fragment, single chain antibody, and other “antibody” forms that retain the ability to bind TGF- ⁇ .
- the antibody can be chimerized or humanized.
- a chimerized antibody includes the constant region of a human antibody and the variable region of a non-human antibody such as a mouse antibody.
- Humanized antibodies comprise the constant and framework variable regions of human antibodies (ie, variable regions other than the hypervariable regions), and the hypervariable regions of non-human antibodies such as mouse antibodies.
- the antibody can be any other type of antibody derivative, such as a human antibody selected or selected from a phage display system or produced from a xenomouse.
- TGF- ⁇ signaling pathway binds to a heterodimeric cell surface complex where the molecule consists of type I (TbRI) and type II (TbRII) serine / threonine kinase receptors and the heterodimeric cells Initiated when inducing a surface complex.
- the heterodimeric receptor then propagates the signal through phosphorylation of the downstream target Smad protein.
- R-Smad receptor-controlled Smad
- Smad4 also known as Smad4
- Smad2 and Smad3 Co-Smad
- I-Smad Inhibition Smad
- the R-Smad forms a complex with the Co-Smad and moves to the nucleus, in cooperation with each other protein, Regulates transcription of target genes (Delynck, R., et al. (1998) Cell 95: 737-740); and Wotton, D.C. (2000) EMBO J.M. 19: 1745).
- the nucleotide sequence and amino acid sequence of human Smad3 are described in, for example, GenBank Accession No. gi: 42476202.
- the nucleotide sequence and amino acid sequence of murine Smad3 are described in, for example, GenBank Accession No. gi: 3153221.
- TGF- ⁇ stimulation results in phosphorylation and activation of Smad2 and Smad3, which form a complex with Smad4 (also referred to as “common Smad” or “co-Smad”), which is in the nucleus. Accumulate with and regulate transcription of target genes. Therefore, TGF- ⁇ signal inhibition can also be achieved by inhibition of Smad2, 3 or co-Smad (Smad4).
- Smad2 and Smad3 also referred to as “common Smad” or “co-Smad”
- Smad4 also referred to as “common Smad” or “co-Smad”
- Smad4 also referred to as “common Smad” or co-Smad4
- TGF- ⁇ signal inhibition can also be achieved by inhibiting R-Smad directly or indirectly.
- Smad6 and Smad7 are inhibitory Smad (I-Smad), ie, transcriptionally induced by TGF- ⁇ and function as inhibitors of TGF- ⁇ signaling (Feng et al. (2005) Annu. Rev. Cell). Dev.Biol.21: 659).
- Smad6 / 7 exerts their inhibitory effect by preventing receptor-mediated activation of R-Smad. They are associated with type I receptors that competitively prevent R-Smad mobilization and phosphorylation.
- Smad6 and Smad7 are known to recruit E3 ubiquitin ligases that result in ubiquitination and degradation of Smad6 / 7 interacting proteins. Therefore, Smad6 and 7 can function as TGF- ⁇ signal inhibitors in the present invention.
- Inhibitors of Smad3 that can be used in the present invention include antisense nucleotides, siRNAs, antibodies, and the like, as low molecular compounds, 6,7-dimethoxy-2-((2E) -3- (s) sold by Calbiochem. 1-methyl-2-phenyl-1H-pyrrolo [2,3-b] pyridin-3-yl-prop-2-enoyl))-1,2,3,4-tetrahydroisoquinolone It is not limited to them.
- culture normalization of corneal endothelial cells has at least one characteristic such as a function inherent in corneal endothelial cells (also referred to as “normal function” in the present specification). It means culturing while maintaining.
- functions include ZO-1 and Na + / K + -ATPase, adaptability to corneal transplantation (Matsubara M, Tanishima T: Wound-healing of the endogenous endothermic chemistry, 198). 26: 264-273; Matsubara M, Tanishima T: Wound-healing of corneal endothermic in monkey: anatradiologic study, Jpn J Othalmol 1983,27: 444-450 k.
- the adaptability to corneal transplantation can be carried out by transplanting cultured cells by mechanically scraping the corneal endothelium as a bullous keratosis model even in laboratory animals such as rabbits.
- rabbit corneal endothelial cells proliferate in vivo, the possibility of spontaneous healing due to proliferation of host corneal endothelial cells cannot be denied (Matsubara M, et al., Jpn J Ophthalmol 1982, 26: 264-273; Matsubara M, et al., Jpn J Ophthalmol 1983, 27: 444-450; Van Horn DL, et al., Exp Eye Res 1975, 21: 113-124 and Van Horn DL, et al., Invest Ophthalmol 77 16: 597-613).
- cynomolgus monkeys such as primates
- at least 1 month preferably at least 2 months, more preferably at least 3 months, more preferably at least 6 months, even more preferably Assess adaptability after at least 12 months.
- Confirmation of transplantation adaptability in primates such as monkeys is particularly important in human application.
- culture normalizing agent refers to an agent for preventing loss of characteristics such as normal function of corneal endothelial cells and the like that can occur during culture.
- the normal function of corneal endothelial cells as described in the present specification is maintained, or even if the decrease is reduced at least. This can be confirmed by testing.
- changes in expression are observed using functional proteins in corneal endothelial cells such as ZO-1 and Na + / K + -ATPase as an index, or engraftment by transplantation into monkeys or the like. And can be done by checking to see if it works.
- the determination method by transplantation can be performed as follows.
- corneal endothelium is cultured on type I collagen to produce a cultured corneal endothelium sheet.
- the corneal limbus of cynomolgus monkey is incised 1.5 mm, a surgical instrument made of silicon is inserted into the anterior chamber, and the corneal endothelial cells are mechanically scraped to produce a bullous keratopathy model.
- the corneal limbus is incised 5-6 mm, the cultured corneal endothelium sheet is inserted into the anterior chamber, and the anterior chamber is replaced with air to adhere the sheet to the corneal endothelium surface.
- the therapeutic effect of bullous keratopathy due to transplantation of cultured corneal endothelium sheet is evaluated by evaluating corneal transparency with a slit lamp microscope.
- a mitogen-activated protein (MAP) kinase inhibitor refers to any inhibitor that directly or indirectly inhibits the signal transduction pathway of MAP kinase.
- a MAP kinase inhibitor relates to a compound that targets, decreases or inhibits mitogen-activated protein.
- MAP kinase is a protein serine / threonine kinase group that is activated in response to various extracellular stimuli and mediates signal transduction from the cell surface to the nucleus. They control several physiological and pathological cellular phenomena, including inflammation, cell death by apoptosis, oncogenic transformation, tumor cell invasion, and metastasis.
- Useful MAP kinase inhibitors according to the present invention include any MAP kinase factor, including, but not limited to, MAPK, ERK, MEK, MEKK, ERK1, ERK2, Raf, MOS, p21ras, GRB2, SOS, JNK, It may be one that inhibits c-jun, SAPK, JNKK, PAK, RAC, and p38.
- MAP kinase inhibitors include, but are not limited to, PD184352, VX-745, SB202190, anisomycin, PD98059, SB203580, U0126, AG126, apigenin, HSP25 kinase inhibitor, 5-iodotuberucidine, MAP kinase antisense oligonucleotides, control MAP kinase oligonucleotide, MAP kinase cascade inhibitors, MAP kinase inhibitors set 1, MAP kinase inhibitors set 2, MEK inhibitors set, olomoucine (olomoucine), Isooromoushin, N 9 isopropyl Oro Mo Shin, p38 MAP kinase inhibitor, PD169316, SB202474, SB202190 hydrochloride, SB202474 dihydrochloride, SB203580 sulfo Includes Ioto-SB203580, SB220025
- MAP kinase is a generic name used to describe the serine / threonine kinase family.
- MAP kinase also called extracellular signal-regulated protein kinases or ERK, is a terminal enzyme of the 3-kinase cascade. Repetition of the 3-kinase cascade to related but delimited signaling pathways gives rise to the concept of the MAPK pathway as a modular multifunctional signaling element that acts sequentially within a pathway, where each enzyme is phosphorylated It is thus characterized by activating the next member of the sequence.
- the standard MAPK module consists of three protein kinases.
- a certain MAPK kinase activates a certain MAPK kinase (or MEK), which in turn activates a certain MAPK / ERK enzyme.
- the MAPK / ERK, JNK (c-jun amino terminal protein kinase (or SAPK)), and p38 cascade are composed of three enzyme modules, including MEKK, MEK and ERK, or MAPK superfamily members, respectively.
- Various extracellular signals when associated with their respective cell surface receptors, trigger an early event that is then transmitted inside the cell where it activates the appropriate cascade.
- MAPK is a mitogen-activated protein kinase (or ERK) superfamily and has a TXY consensus sequence in the catalytic core.
- ERK1 / 2, p38HOG, and JNK / SAPK are related but distinct terminal enzymes in the parallel pathway.
- MAP kinase constitutive activation of MAP kinase is associated with a number of cancer cell lines (pancreas, colon, lung, ovary, and kidney) and primary tumors from various human organs (kidney, colon, and lung) ( Hoshino et al., Oncogene, 18 (3): 813-22 (Jan. 1999)).
- p38 MAP kinase regulates the production of two cytokines, TNF ⁇ and IL-1, associated with the onset and progression of inflammation.
- p38 MAP kinase inhibitors may also play a promising role in the treatment of heart failure, stroke, neurological diseases, and other diseases in addition to inflammatory diseases such as rheumatoid arthritis.
- MAP kinase inhibitors are useful for treating a variety of medical conditions from cancer to inflammation.
- ERK is the only substrate as far as MEK1 is concerned, this close selectivity combined with the central role of the MAP kinase pathway and the enhanced expression of its essential components in tumor cells makes inhibition of this pathway It shows an important route for both radiation and chemosensitization of tumor cells and a potential target for pharmacological intervention in proliferative diseases.
- Sebolt-Leopold et al. Nat. Med. , 5 (7): 810-6 (Jul, 1999) describes an in vitro cascade assay system for identifying small molecule inhibitors of the MAP kinase (MAPK) pathway.
- Glutathione-S-transferase (GST) -MEK1 and GST-MAPK fusion proteins were prepared from bacterial cells and sequentially in this assay system to MEK1 MAPK and MBP (myelin basic protein). Used for phosphorylation.
- PD 184352 [2- (2-chloro-4-iodo-phenylamino) -N-cyclopropylmethoxy-3,4-difluoro-benzamide], which directly inhibits MEK1, has also been found.
- MAP kinase inhibitors include: MAP kinase inhibitor: AG126, Apigenin, HSP25 kinase inhibitor, 5-iodotuberucidine, MAP kinase antisense oligonucleotide, control MAP kinase oligonucleotide, MAP kinase cascade inhibitor , MAP kinase inhibitors set 1, MAP kinase inhibitors set 2, MEK inhibitors set, olomoucine (olomoucine), Isooromoushin, N 9 isopropyl Oro Mo thin, p38 MAP kinase inhibitors, PD98059 (2'-amino-3' Methoxyflavone), PD98059 solution, PD169316 (Calbiochem), SB202474, SB202190 (4- [4- (4-fluorophenyl) -5- (4-pyridy Nil) -1H-imidazol-2-yl
- MAP kinase inhibitors that can be used in the present invention include, for example, neutralizing antibodies against MAP kinase, compounds that inhibit the activity of MAP kinase, compounds that inhibit transcription of a gene encoding MAP kinase (for example, , Antisense nucleic acids, RNAi, ribozymes), peptides, and compounds such as plant components (eg, polyphenols, flavonoids, glycosides).
- concentration used examples include SB203580, SB202190, PD169316, FR167653, BIRB796BS, etc., and are about 50 nmol / l to 100 ⁇ mol / l, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 to 10 ⁇ mol / l, about 0.01 to 10 ⁇ mol / l, about 0.05 to 10 ⁇ mol / l, about 0.075 to 10 ⁇ mol / l, about 0.
- aging inhibitor or “anti-aging agent” of corneal endothelial cells refers to any drug capable of suppressing cell aging.
- a normal human cell loses division ability by repeating division more than a certain number of times, and becomes senescent (replicative senescence).
- Senescent cells induce specific genes through specific morphological and physiological changes.
- normal cells exhibit the same phenomenon as described above by various treatments (precure sensence).
- inhibiting aging” of a cell means having an effect of increasing the density of the cell.
- “aging inhibitor” or “anti-aging agent” refers to any agent that increases the density of cells.
- the degree of aging of cells is the observation of cell morphology (flattening and hypertrophy occurs when cells aging) and ⁇ -galactosidase staining image known as an aging marker ( ⁇ -galactosidase staining image increases as aging progresses) ) By observing. Therefore, any anti-aging agent used in the present invention can be used as long as it has the anti-aging action.
- an action to suppress aging it is an action to suppress the deterioration of normal cell function caused by aging, for example, an action to suppress cell cycle arrest, an action to reduce normal cell division life, and a normal cell survival.
- SB203580 can not only suppress the fibrosis but also suppress the decrease in cell density and culture high-density corneal endothelial cells. Therefore, when used in the present invention, it is understood that any antiaging agent can suppress the decrease in cell density and improve the culture of high-density corneal endothelial cells.
- the judgment of “aging inhibition” is based on the fact that the decrease in corneal endothelial cell density is suppressed and the high density can be maintained. It is known that the corneal endothelium density also decreases in vivo in accordance with aging (Kunitoshi Ohara, Tadahiko Mizuru, Inada Shigeru: Parameters of corneal endothelial cell morphology. Jinkai 91: 1073-1078, 1987). It is a good indicator of aging judgment from the viewpoint. In addition, as a general index of cell aging, there is a decrease in the nucleus / cytoplasm ratio, but it is considered that it can be used similarly in the corneal endothelium. Examples of other aging inhibitors include, but are not limited to, other p38 MAP kinase inhibitors.
- p38 MAP kinase inhibitor refers to any drug that inhibits MAP kinase signaling related to p38.
- a p38 MAP kinase inhibitor relates to a compound that targets, decreases or inhibits p38-MAPK, which is a MAPK family member.
- P38 is a member of the mammalian MAPK superfamily and is activated by stress, ultraviolet light, and inflammatory cytokines.
- the catalyst core has a TGY consensus sequence.
- dysregulated kinases are a major etiology in many diseases, particularly proliferative and inflammatory disorders.
- One of the first oncogenes identified in the oncology area was for epidermal growth factor receptor kinase (EGFR), but its overexpression is associated with lung, breast, brain, prostate, GI and ovarian cancer. Yes.
- EGFR epidermal growth factor receptor kinase
- constitutive activation of MAP kinase is associated with primary tumors from many cancer cell lines (pancreas, colon, lung, ovary, and kidney) and various human organs (kidney, colon, and lung) ( Hoshino et al., Oncogene, 18 (3): 813-22 (Jan. 1999)).
- p38 MAP kinase regulates the production of two cytokines, TNF ⁇ and IL-1, associated with the onset and progression of inflammation.
- p38 MAP kinase inhibitors may also play a promising role in the treatment of heart failure, stroke, neurological diseases, and other diseases in addition to inflammatory diseases such as rheumatoid arthritis.
- MAP kinase inhibitors are useful for treating a variety of medical conditions from cancer to inflammation.
- the p38 MAP kinase inhibitor that can be used in the present invention is not particularly limited as long as it is a compound having p38 MAP kinase inhibitory activity in addition to VX-745 (Vertex Pharmaceuticals Inc.). JP 2000-503304, JP 2001-522357, JP 2003-535023, JP 2001-506266, JP 9-508123, WO 01/56553, International Publication No. 93/14081, International Publication No. 01/35959, International Publication No. 03/68229, International Publication No. 03/85859, Special Publication 2002-534468, Special Publication 2001-526222 , Special Table 2001-52622 No. 6, U.S. Pat. No.
- Tocris Cookson (St Louis, USA) is available at http: // www. tocris. com / provides various MAP kinase inhibitors.
- SB202190 (4- [4- (4-fluorophenyl) -5- (4-pyridinyl) -1H-imidazol-2-yl] phenol) is a highly selective, potent and cell-permeable p38 MAP.
- a kinase inhibitor SmithKline Beecham, plc) (Jiang et al., J. Biol. Chem., 271: 17920 (1996); Frantz et al., Biochemistry, 37: 138-46 (1998); Nemoto et al., J. Biol.
- Anisomycin ((2R, 3S, 4S) -2-[(4-methoxyphenyl) methyl] -3,4-pyrrolidinediol-3-acetate) is a protein synthesis inhibitor (blocks translation). It is a potent activator of stress activated protein kinases (JNK / SAPK) and p38 MAP kinase, homologous desensitization induced by immediate early genes (c-fos, fosB, c-jun, junB, and junD) Acts as a powerful signaling agonist that selectively induces the product.
- JNK / SAPK stress activated protein kinases
- p38 MAP kinase homologous desensitization induced by immediate early genes (c-fos, fosB, c-jun, junB, and junD) Acts as a powerful signaling agonist that selectively induces the product.
- SB203580 (4- [5- (4-fluorophenyl) -2- [4- (methylsulfonyl) phenyl] -1H-imidazol-4-yl] pyridine) is a highly selective of p38 mitogen-activated protein kinase. Inhibitor (SmithKlineBeecham, plc).
- the SB203580 hydrochloride (4- [5- (4-fluorophenyl) -2- [4- (methylsulfonyl) phenyl] -1H-imidazol-4-yl] pyridine) compound is a highly selective p38 mitogen activation It is a water-soluble salt of a protein kinase inhibitor. It has been shown to inhibit interleukin-2-induced T cell proliferation, cyclooxygenase-1 and -2, and thromboxane synthase.
- U0126 (1,4-diamino-2,3-dicyano-1,4-bis [2-aminophenylthio] butadiene) is a potent and selective non-competitive inhibitor of MAP kinase kinase.
- Preferred p38 MAPK inhibitors include, but are not limited to, SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine). .
- cell adhesion promoter or “adhesion promoter” of corneal endothelial cells refers to an agent that imparts or improves cell adhesion, and if it has such a function, Any drug may be used.
- exemplary adhesion promoters for corneal endothelial cells include, but are not limited to, Rho kinase inhibitors.
- Rho kinase means a serine / threonine kinase that is activated with the activation of Rho.
- ROK ⁇ ROCK-II: Leung, T. et al., J. Biol. Chem., 270, 29051-29054, 1995
- p160 ROCK ROCK ⁇ , ROCK-I: Ishizaki, T. et al., The EMBO J., 15 (8), 1885-1893, 1996) and other proteins having serine / threonine kinase activity.
- Rho kinase inhibitor examples include the following documents: US Pat. International Publication No. 2002/083175, International Publication No. 02/100833, International Publication No. 03/059913, International Publication No. 03/062227, International Publication No. 2004/009555, International Publication No. 2004/022541, International Publication No. 2004/108724, International Publication No.
- 1- (5-isoquinolinesulfonyl) homopiperazine or a salt thereof eg, fasudil (1- (5-isoquinolinesulfonyl) homopiperazine)
- (+)-trans-4- (1-aminoethyl)- 1- (4-pyridylcarbamoyl) cyclohexane ((R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide) or a salt thereof (eg, Y-27632 ((R )-(+)-Trans- (4-pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate)), and the like.
- Yakuhin Co., Ltd., Asahi Kasei Pharma, etc. can also be suitably used.
- (+)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexane, 1- (5-isoquinolinesulfonyl) homopiperazine and pharmaceutically acceptable salts thereof are Since it is particularly excellent in promoting cell adhesion, it is preferably used.
- the salt of the compound is preferably a pharmaceutically acceptable acid addition salt, and these acids are inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, methanesulfonic acid, fumaric acid, maleic acid, mandelic acid, Organic acids such as citric acid, tartaric acid and salicylic acid are listed.
- (+)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexane ((R)-(+)-trans- (4-pyridyl) -4- (1-aminoethyl)- Cyclohexanecarboxamide) dihydrochloride (which may be a monohydrate) and 1- (5-isoquinolinesulfonyl) homopiperazine hydrochloride are more preferred.
- examples of “promotion of adhesion of corneal endothelial cells” include both promotion of adhesion between corneal endothelial cells and promotion of adhesion between corneal endothelial cells and a culture substrate.
- the (cell) adhesion promoter that can be used in the present invention is a corneal endothelium separated from a corneal tissue derived from a mammal (eg, human, mouse, rat, hamster, rabbit, cat, dog, cow, sheep, monkey, etc.). It exerts an adhesion promoting action on cells or isolated and passaged corneal endothelial cells. Since the adhesion promoter of the present invention is particularly excellent in the adhesion promoting action of human-derived corneal endothelial cells that are difficult to culture and subculture, it is preferable to target human-derived corneal endothelial cells.
- Corneal endothelial cells play a role in maintaining the transparency of the cornea. When the density of the endothelial cells decreases beyond a certain limit, swelling of the cornea occurs, the transparency of the cornea cannot be maintained, and corneal endothelial damage is caused.
- the adhesion promoter that can be used in the present invention promotes the adhesion of corneal endothelial cells and enables the formation of a corneal endothelial cell layer having good cell morphology and high cell density.
- “substance (eg, nucleic acid) that suppresses expression refers to a substance that suppresses transcription of mRNA of a target gene, or a substance (eg, nucleic acid) that degrades the transcribed mRNA. ) Or a substance that suppresses translation of protein from mRNA (for example, nucleic acid), is not particularly limited. Examples of such substances include siRNA, antisense oligonucleotides, ribozymes or nucleic acids such as expression vectors thereof. Among these, siRNA and its expression vector are preferable, and siRNA is particularly preferable.
- “substances that suppress gene expression” include proteins, peptides, and other small molecules.
- the target gene is any gene involved in the TGF- ⁇ signaling pathway.
- a method for inhibiting the expression of a specific endogenous gene such as TGF- ⁇ targeted in the present invention a method using an antisense technique is well known to those skilled in the art. There are several factors as described below for the action of the antisense nucleic acid to inhibit the expression of the target gene.
- transcription initiation inhibition by triplex formation transcription inhibition by hybridization with a site where an open loop structure is locally created by RNA polymerase, transcription inhibition by hybridization with RNA that is undergoing synthesis, intron and exon Splicing inhibition by hybrid formation at the junction with nuclease, splicing inhibition by hybridization with spliceosome formation site, inhibition of transition from nucleus to cytoplasm by hybridization with mRNA, hybridization with capping site and poly (A) addition site Inhibition of splicing by RNA, inhibition of translation initiation by hybridization with a translation initiation factor binding site, inhibition of translation by hybridization with a ribosome binding site in the vicinity of the initiation codon, hybridization with mRNA translation region and polysome binding site Outgrowth inhibitory peptide chain by de formation, and gene expression inhibition by hybrid formation at sites of interaction between nucleic acids and proteins, and the like.
- antisense nucleic acids inhibit the expression of target genes by inhibiting various processes such as transcription, splicing or translation (Hirashima and Inoue, Shinsei Kagaku Kenkyu 2, Nucleic acid IV gene replication and expression, Japan biochemicalization) Academic Society, Tokyo Kagaku Dojin, 1993, 319-347.).
- the antisense nucleic acid used in the present invention may inhibit the expression and / or function of a gene (nucleic acid) encoding the above-described TGF- ⁇ signal transduction pathway member or the like by any of the above-described actions.
- a gene nucleic acid
- an antisense sequence complementary to the untranslated region near the 5 ′ end of the mRNA of the gene encoding TGF- ⁇ or the like described above is designed, it is considered effective for inhibiting translation of the gene. .
- a sequence complementary to the coding region or the 3 'untranslated region can also be used.
- the antisense nucleic acid used in the present invention is linked downstream of a suitable promoter, and preferably a sequence containing a transcription termination signal is linked on the 3 'side.
- the nucleic acid thus prepared can be transformed into a desired animal (cell) using a known method.
- the sequence of the antisense nucleic acid is preferably a sequence complementary to a gene encoding TGF- ⁇ or the like possessed by the animal (cell) to be transformed, or a part thereof, as long as the gene expression can be effectively suppressed.
- the transcribed RNA preferably has a complementarity of 90% or more, most preferably 95% or more, to the transcript of the target gene.
- the length of the antisense nucleic acid is preferably at least 12 bases and less than 25 bases, but the antisense nucleic acid of the present invention is not necessarily of this length. For example, it may be 11 bases or less, 100 bases or more, or 500 bases or more.
- the antisense nucleic acid may be composed only of DNA, but may contain a nucleic acid other than DNA, for example, a locked nucleic acid (LNA).
- LNA locked nucleic acid
- the antisense nucleic acid used in the present invention may be an LNA-containing antisense nucleic acid containing LNA at the 5 'end and LNA at the 3' end.
- an antisense nucleic acid for example, Hirashima and Inoue, Shinsei Kagaku Kogaku Kenkyu 2 (Replication and Expression of Nucleic Acid IV Gene, edited by the Japanese Biochemical Society, Tokyo Chemical Dojin, 1993, 319-347. Can be used to design antisense sequences based on nucleic acid sequences such as TGF- ⁇ .
- Inhibition of expression of TGF- ⁇ or the like can also be carried out using a ribozyme or a DNA encoding a ribozyme.
- a ribozyme refers to an RNA molecule having catalytic activity. Although ribozymes have various activities, research focusing on ribozymes as enzymes that cleave RNA has made it possible to design ribozymes that cleave RNA in a site-specific manner. Some ribozymes have a size of 400 nucleotides or more, such as group I intron type and M1 RNA contained in RNase P, but some have an active domain of about 40 nucleotides called hammerhead type or hairpin type. (Makoto Koizumi and Eiko Otsuka, protein nucleic acid enzyme, 1990, 35, 2191.).
- the self-cleaving domain of hammerhead ribozyme cleaves 3 ′ of C15 in the sequence G13U14C15, but base pairing between U14 and A9 is important for its activity, and instead of C15, A15 or U15 However, it has been shown that it can be cleaved (Koizumi, M. et al., FEBS Lett, 1988, 228, 228.).
- a restriction enzyme-like RNA-cleaving ribozyme that recognizes the sequence UC, UU or UA in the target RNA can be created (Koizumi, M.
- Hairpin ribozymes are also useful for the purposes of the present invention.
- This ribozyme is found, for example, in the minus strand of tobacco ring spot virus satellite RNA (Buzayan, JM., Nature, 1986, 323, 349.). It has been shown that target-specific RNA-cleaving ribozymes can also be produced from hairpin ribozymes (Kikuchi, Y. & Sasaki, N., Nucl. Acids Res, 1991, 19, 6751., Hiroshi Kikuchi, Chemistry and Biology) , 1992, 30, 112.). Thus, the expression of the gene can be inhibited by specifically cleaving the transcription product of the gene encoding TGF- ⁇ or the like using a ribozyme.
- RNA interference RNA interference
- RNAi RNA interference
- dsRNA double-stranded RNA
- siRNA short-chain dsRNA
- siRNA is an RNA molecule having a double-stranded RNA portion consisting of 15 to 40 bases, cleaving the mRNA of a target gene having a sequence complementary to the antisense strand of the siRNA, It has a function of suppressing the expression of the target gene.
- the siRNA in the present invention comprises a sense RNA strand comprising a sequence homologous to a continuous RNA sequence in mRNA such as TGF- ⁇ , and an antisense RNA strand comprising a sequence complementary to the sense RNA sequence. It is RNA containing the double stranded RNA part which becomes.
- RNA region of mRNA that is a transcription product of a sequence such as TGF- ⁇ and to produce a double-stranded RNA corresponding to this region. It can be done as appropriate.
- selection of siRNA sequences having a stronger RNAi effect from mRNA sequences that are transcripts of the sequences can also be appropriately performed by those skilled in the art by known methods. If one strand is known, those skilled in the art can easily know the base sequence of the other strand (complementary strand). siRNA can be appropriately prepared by those skilled in the art using a commercially available nucleic acid synthesizer. In addition, for synthesis of a desired RNA, a general synthesis contract service can be used.
- the length of the double-stranded RNA portion is 15 to 40 bases, preferably 15 to 30 bases, more preferably 15 to 25 bases, still more preferably 18 to 23 bases, and most preferably 19 to 21 bases as a base. . It is understood that these upper and lower limits are not limited to these specific ones and may be any combination of those listed.
- the terminal structure of the sense strand or antisense strand of siRNA is not particularly limited and may be appropriately selected depending on the intended purpose. For example, it may have a blunt end or a protruding end (overhang) It is preferable that the 3 ′ end protrudes.
- the siRNA having an overhang consisting of several bases, preferably 1 to 3 bases, more preferably 2 bases, at the 3 ′ end of the sense RNA strand and the antisense RNA strand suppresses the expression of the target gene.
- the effect is often large and is preferable.
- the type of the overhanging base is not particularly limited, and may be either a base constituting RNA or a base constituting DNA.
- Preferred overhang sequences include dTdT (deoxy T 2 bp) at the 3 'end.
- preferred siRNAs include, but are not limited to, those in which dTdT (deoxy T is 2 bp) is attached to the 3 'end of the sense / antisense strands of all siRNAs.
- siRNA in which one to several nucleotides are deleted, substituted, inserted and / or added in one or both of the sense strand or antisense strand of the siRNA can also be used.
- the 1 to several bases are not particularly limited, but preferably 1 to 4 bases, more preferably 1 to 3 bases, and most preferably 1 to 2 bases.
- Such mutations include those in which the number of bases of the 3 ′ overhang portion is 0 to 3, or the base sequence of the 3 ′ overhang portion is changed to another base sequence, or insertion or addition of bases Or, there may be mentioned those in which the length of the sense RNA strand differs from that of the antisense RNA strand by 1 to 3 bases due to deletion, or in which the base is substituted with another base in the sense strand and / or antisense strand. However, it is not limited to these. However, it is necessary that the sense strand and the antisense strand can hybridize in these mutant siRNAs, and that these mutant siRNAs have the ability to suppress gene expression equivalent to siRNA having no mutation.
- the siRNA may be a molecule having a structure in which one end is closed, for example, an siRNA having a hairpin structure (Short Hairpin RNA; shRNA).
- shRNA is a RNA comprising a sense strand RNA of a specific sequence of a target gene, an antisense strand RNA consisting of a sequence complementary to the sense strand sequence, and a linker sequence connecting both strands, and a sense strand portion and an antisense strand The portions hybridize to form a double stranded RNA portion.
- siRNA does not show a so-called off-target effect in clinical use.
- the off-target effect refers to the action of suppressing the expression of another gene that is partially homologous to the siRNA used in addition to the target gene.
- NCBI National Center for Biotechnology Information
- RNA of the present invention In order to produce the siRNA of the present invention, a known method such as a method using chemical synthesis or a method using a gene recombination technique can be appropriately used.
- double-stranded RNA can be synthesized by a conventional method based on sequence information.
- an expression vector encoding a sense strand sequence or an antisense strand sequence is constructed, and the sense strand RNA or antisense strand RNA generated by transcription after introducing the vector into a host cell. It can also be produced by acquiring each of the above.
- RNA that comprises a sense strand of a specific sequence of a target gene, an antisense strand consisting of a sequence complementary to the sense strand sequence, and a linker sequence that connects both strands to form a hairpin structure.
- the whole or a part of the nucleic acid constituting the siRNA may be a natural nucleic acid or a modified nucleic acid.
- the siRNA in the present invention does not necessarily need to be a pair of double-stranded RNAs for the target sequence, and a plurality of sets for the region containing the target sequence (this “plurality” is not particularly limited, but preferably 2 to 5) It may be a mixture of double-stranded RNA.
- siRNA as a nucleic acid mixture corresponding to the target sequence can be appropriately prepared by a person skilled in the art using a commercially available nucleic acid synthesizer and a DICER enzyme. Synthetic contract service can be used.
- the siRNA of the present invention includes so-called “cocktail siRNA”. In the siRNA of the present invention, not all nucleotides are necessarily ribonucleotides (RNA).
- the one or more ribonucleotides constituting the siRNA may be corresponding deoxyribonucleotides.
- This “corresponding” refers to the same base species (adenine, guanine, cytosine, thymine (uracil)) although the structures of the sugar moieties are different.
- deoxyribonucleotide corresponding to ribonucleotide having adenine refers to deoxyribonucleotide having adenine.
- a DNA (vector) capable of expressing the RNA of the present invention is also included in a preferred embodiment of a nucleic acid capable of suppressing the expression of TGF- ⁇ and the like.
- the DNA (vector) capable of expressing the double-stranded RNA of the present invention is a DNA encoding one strand of the double-stranded RNA and a DNA encoding the other strand of the double-stranded RNA, Each DNA has a structure linked to a promoter so that it can be expressed.
- the expression vector of the present invention can be prepared by appropriately inserting DNA encoding the RNA of the present invention into various known expression vectors.
- a modified nucleic acid may be used as the nucleic acid that suppresses the expression of the target gene.
- the modified nucleic acid means one having a structure different from that of a natural nucleic acid, in which a nucleoside (base site, sugar site) and / or internucleoside binding site is modified.
- Examples of the “modified nucleoside” constituting the modified nucleic acid include an abasic nucleoside; an arabino nucleoside, 2′-deoxyuridine, ⁇ -deoxyribonucleoside, ⁇ -L-deoxyribonucleoside, and other sugars.
- nucleosides having modifications include peptide nucleic acids (PNA), peptide nucleic acids to which phosphate groups are bound (PHONA), locked nucleic acids (LNA), morpholino nucleic acids and the like.
- PNA peptide nucleic acids
- PONA peptide nucleic acids to which phosphate groups are bound
- LNA locked nucleic acids
- nucleoside having a sugar modification include substituted pentose monosaccharides such as 2′-O-methylribose, 2′-deoxy-2′-fluororibose, and 3′-O-methylribose; 1 ′, 2′-deoxyribose Arabinose; substituted arabinose sugars; nucleosides with hexose and alpha-anomeric sugar modifications are included.
- These nucleosides may be modified bases with modified base sites. Examples of such modified bases include pyrimidines such as 5-hydroxycytosine, 5-fluorouraci
- modified internucleoside linkage constituting the modified nucleic acid
- examples of the “modified internucleoside linkage” constituting the modified nucleic acid include, for example, alkyl linker, glyceryl linker, amino linker, poly (ethylene glycol) linkage, methylphosphonate internucleoside linkage; methylphosphonothioate, phosphotriester , Phosphothiotriester, phosphorothioate, phosphorodithioate, triester prodrug, sulfone, sulfonamide, sulfamate, formacetal, N-methylhydroxylamine, carbonate, carbamate, morpholino, boranophosphonate, phosphoramidate, etc.
- Non-natural internucleoside linkages include, for example, alkyl linker, glyceryl linker, amino linker, poly (ethylene glycol) linkage, methylphosphonate internucleoside linkage; methylphosphonothioate
- Examples of the nucleic acid sequence contained in the double-stranded siRNA of the present invention include siRNA for TGF- ⁇ or other TGF- ⁇ signal members.
- siRNA shows very excellent specific post-transcriptional repression effect in vitro, but in vivo it is rapidly degraded by the nuclease activity in serum, so its duration is limited and more optimal and effective delivery. System development has been demanded.
- One example is Ochiya, T et al., Nature Med.
- atelocollagen a biocompatible material
- a nucleic acid when atelocollagen, a biocompatible material, is mixed with a nucleic acid to form a complex, it has an action of protecting the nucleic acid from degrading enzymes in the living body and is very suitable as a carrier of siRNA.
- the method of introducing the nucleic acid or medicament of the present invention is not limited thereto. In this way, in the living body, it is rapidly degraded by the action of the nucleolytic enzyme in the serum, so that a long-term effect can be achieved. For example, Takeshita F.I. PNAS.
- bovine skin-derived atelocollagen forms a complex with nucleic acid and protects the nucleic acid from in vivo degrading enzymes. Have been reported to be highly suitable as a carrier of siRNA, and such a technique can be used.
- medium refers to any medium that can maintain or proliferate corneal endothelial cells, and if necessary, any medium such as a liquid medium (culture solution), suspension medium, solid medium, etc. It can take the form of Examples of the components of the medium used for such corneal endothelial cells include DMEM (GIBCO BRL), OptiMEM (Life Technologies), serum (eg, fetal bovine serum (FBS)), growth factor / growth factor (eg, B-FGF), antibiotics (for example, penicillin, streptomycin, gentamicin) and the like.
- DMEM fetal bovine serum
- FBS fetal bovine serum
- growth factor / growth factor eg, B-FGF
- antibiotics for example, penicillin, streptomycin, gentamicin
- the present invention provides a culture normalizing agent for corneal endothelial cells containing a fibrosis inhibitor.
- corneal endothelial cells were difficult to proliferate while maintaining a morphology suitable for transplantation.
- transplantation became difficult after repeated passages.
- An index that makes transplantation difficult is the loss of functional protein.
- a morphological change occurs in a normal culture method, but in the present invention, it is considered as a fibrotic change because it is morphologically fibroblast-like, and this is an activity of TGF- ⁇ signal. It was discovered that it was accompanied by crystallization.
- the activation of the TGF- ⁇ signal is not intended to be limited, but as illustrated in the Examples, extracellular such as fibronectin and collagen type 1, type 4, type 8 fibronectin, integrin ⁇ 5, and integrin ⁇ 1 This can be determined by examining the amount, level, etc. of the matrix or integrin. Without intending to be limiting, the protein expression level of fibronectin is up-regulated more strongly in the fibroblast phenotype than in the normal phenotype. Conventionally, it has been found that fibrosis of corneal endothelial cells is accompanied in extremely rare diseases such as congenital syphilis in the living body, but there is no development of a treatment for suppressing fibrosis.
- the present inventors used a drug known to suppress fibrosis as a representative example of a TGF- ⁇ signal inhibitor in other cells, which enabled culture that suppressed morphological changes and was unexpectedly normal. It was found that passage can be performed while maintaining the function (that is, culture normalization is possible), and that corneal endothelial cells can be greatly proliferated. Conventionally, it has been impossible to culture a large amount of corneal endothelial cells while maintaining normal function. Therefore, it should be said that the effect achieved by the present invention is quite remarkable.
- a fibrosis inhibitor can be included alone, or several kinds can be used in combination as required.
- the concentration of the fibrosis inhibitor used in the present invention is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l.
- the other concentration ranges can be appropriately changed, for example, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 ⁇ 10 ⁇ mol / l, about 0.01-10 ⁇ mol / l, about 0.05-10 ⁇ mol / l, about 0.075-10 ⁇ mol / l, about 0.1-10 ⁇ mol / l, about 0.5-10 ⁇ mol / l, About 0.75 to 10 ⁇ mol / l, about 1.0 to 10 ⁇ mol / l, about 1.25 to 10 ⁇ mol / l, about 1.5 to 10 ⁇ mol / l, about 1.75 to 10 ⁇ mol / l, about
- a culture normalizing agent when used in a medium or the like, can be included alone, or several types can be used in combination as necessary, and the culture normalizing agent itself contains a single active ingredient. It can also be included in combination of several types as required.
- the concentration of the culture normalizing agent of the present invention used in a medium or the like is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l.
- the concentration range can be appropriately changed.
- the concentration range is usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l.
- TGF- ⁇ signaling pathways are broadly classified into the Smad2 / 3 system via ALK4, 5 or 7, and the Smad1 / 5/8 system via ALK1, 2, 3 or 6, both of which are related to fibrosis (J. Massagu'e, Annu. Rev. Biochem. 1998.67: 753-91; Villa JMG, Jansen R, Sander C (2006) PLoS Compute Biol 2 (1): e3; Leak, A., Abraham, D.J.FASEB J.18, 816-827 (2004); Coert Margadant & Arnaud Sonnenberg EMBO reports (2010) 11, 97-105; . Al, Ann Intern Med.2010; 152: 159-166).
- Non-Patent Documents 2 and 4 a state that is accompanied by a membranous tissue that is actually made of an extracellular matrix such as collagen due to syphilitic keratitis, which is a very special disease, or a severely artificially created disorder
- Non-patent document 5 shows that fibrosis during severe injury of the cornea is caused by IL-1 ⁇ and activation of p38 MAPK in the middle, and non-patent document 6 is severe in the living body due to excessive freezing trauma in rabbits. It is shown by using rabbits that the fibrosis observed when the inflammation of the tumor occurs is accompanied by the activation of p38 MAPK and the fibrosis can be partially suppressed by the inhibitor. These documents show that extremely strong inflammation occurs in the living body and accompanies membranous tissue consisting of extracellular matrix, and that p38 MAPK activation is involved, and fibrosis occurs in normal culture conditions.
- the fibrosis inhibitor used in the present invention comprises a transforming growth factor (TGF) ⁇ signal inhibitor. Therefore, the present invention also has an aspect of providing a culture normalizing agent for corneal endothelial cells containing a TGF- ⁇ signal inhibitor.
- TGF- ⁇ signal inhibitor used in the present invention any agent may be used as long as it can inhibit the TGF- ⁇ signal pathway.
- TGF- ⁇ signaling pathways to be inhibited include those directly associated with TGF- ⁇ and TGF- ⁇ receptors, and finally TGF- ⁇ signaling pathways such as BMP-7. Any signal-related factor may be used as long as it exhibits the same effect as described above (the opposite is true for inhibitors and antagonists).
- a TGF- ⁇ signal inhibitor can be included alone, or several types can be used in combination as required.
- the concentration of the TGF- ⁇ signal inhibitor used in the present invention is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l. In this case, the concentration range can be appropriately changed.
- Examples of other concentration ranges are usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, About 1 to 10 ⁇ mol / l, about 0.01 to 10 ⁇ mol / l, about 0.05 to 10 ⁇ mol / l, about 0.075 to 10 ⁇ mol / l, about 0.1 to 10 ⁇ mol / l, about 0.5 to 10 ⁇ mol / l 1, about 0.75 to 10 ⁇ mol / l, about 1.0 to 10 ⁇ mol / l, about 1.25 to 10 ⁇ mol / l, about 1.5 to 10 ⁇ mol / l, about 1.75 to 10 ⁇ mol / l, about 2.
- ⁇ mol / l about 1.25 to 3.0 ⁇ mol / l, about 1.5 to 3.0 ⁇ mol / l, about 1.75 to 3.0 ⁇ mol / l, about 2.0 to 3.0 ⁇ mol / l, about 0 .01-1.0 ⁇ mol / l, about 0.05-1.0 ⁇ mol / l, about 0.075-1.0 ⁇ mol / l, about 0.1-1.0 ⁇ mol / l, about 0.5-1.0 ⁇ mol / L, about 0.75 to 1.0 ⁇ mol / l, about 0.09 to 35 ⁇ mol / l, about 0.09 to 3.2 ⁇ mol / l, more preferably about 0.05 to 1.0 ⁇ mol / l.
- culture normalization expresses ZO-1 and Na + / K + -ATPase and has a cellular function selected from the group consisting of morphologically polygonal and non-stratified. Including being normal.
- normalization of culture is for producing transplanted cells adapted for corneal transplantation.
- the transplant cell is a primate cell.
- the transplant cell is a human cell.
- the TGF- ⁇ signal inhibitor is an antagonist of TGF- ⁇ , an antagonist of the receptor of TGF- ⁇ , or an inhibitor of Smad3, other components exemplified herein, their pharmaceutically It includes at least one acceptable salt or solvate, or solvate of a pharmaceutically acceptable salt thereof. Any of the TGF- ⁇ antagonists, TGF- ⁇ receptor antagonists, and Smad3 inhibitors described elsewhere herein may be utilized.
- the TGF- ⁇ signal inhibitor that can be used in the present invention is SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl] -1H-imidazole- 2-yl] benzamide), BMP-7, anti-TGF- ⁇ antibody, anti-TGF- ⁇ receptor antibody, TGF- ⁇ siRNA, TGF- ⁇ receptor siRNA, TGF- ⁇ antisense oligonucleotide, 6,7- Dimethoxy-2-((2E) -3- (1-methyl-2-phenyl-1H-pyrrolo [2,3-b] pyridin-3-yl-prop-2-enoyl))-1,2,3 4-tetrahydroisoquinolone, A83-01 (3- (6-methyl-2-pyridinyl) -N-phenyl-4- (4-quinolinyl) -1H-pyrazole-1-carbothioa De), stearyl leakage CURE TM TLK inhibitor
- SB431542 Smad1 / 5/8 (related to ALK1, 2, 3 and 6), which works through Smad2 / 3 (related to ALK4, 5 and 7) Since normalization is observed in both of BMP-7 that exerts an effect through this, it is understood that the effect of the present invention can be achieved even with a TGF- ⁇ signal inhibitor of any of these pathways. Is done.
- the TGF- ⁇ signal inhibitor used in the present invention is SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl) -1H-imidazole-2- Yl] benzamide). This is because fibrosis was suppressed and it was shown that proteins responsible for normal function were retained, and it also withstood primate transplantation.
- SB431542 is included to be present at a concentration of about 0.1 ⁇ M to about 10 ⁇ M at the time of use, preferably at a concentration of about 1 ⁇ M to about 10 ⁇ M at the time of use, more preferably Included to be present at a concentration of about 1 ⁇ M when used.
- the TGF- ⁇ signal inhibitor used in the present invention comprises BMP-7.
- BMP-7 is included such that it is present at a concentration of about 10 ng / ml to about 1000 ng / ml when used, more preferably at a concentration of about 100 ng / ml to about 1000 ng / ml when used. Included to be. BMP-7 may be included to be present at a concentration of about 100 ng / ml at the time of use, or may be included to be present at a concentration of about 1000 ng / ml.
- the fibrosis inhibitor used in the present invention further comprises a MAP kinase inhibitor.
- a MAP kinase inhibitor any agent may be used as long as it can inhibit the MAP kinase signal pathway.
- the MAP kinase signal to be inhibited is involved in phosphorylating MAP kinase, and there is a pathway in which the signal is transmitted upstream or downstream, or there is a pathway that merges from other pathways as a sidestream. It may be a signal.
- one type of MAP kinase inhibitor can be included alone, or several types can be used in combination as required.
- the concentration of the MAP kinase agent used in the present invention is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l.
- the other concentration ranges may be, for example, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 to 10 ⁇ mol / l, about 0.01 to 10 ⁇ mol / l, about 0.05 to 10 ⁇ mol / l, about 0.075 to 10 ⁇ mol / l, about 0.1 to 10 ⁇ mol / l, about 0.5 to 10 ⁇ mol / l, about 0.75 to 10 ⁇ mol / l, about 1.0 to 10 ⁇ mol / l, about 1.25 to 10 ⁇ mol / l, about 1.5 to 10 ⁇ mol / l, about 1.75 to 10 ⁇ mol
- the MAP kinase inhibitor used in the present invention is SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine).
- SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine.
- other components exemplified herein are included.
- the culture normalizing agent of the present invention further comprises an aging inhibitor.
- an aging inhibitor any anti-aging agent that can be used can be used as long as it is known to suppress cell aging.
- one type of aging inhibitor can be included alone, or several types can be used in combination as required.
- the concentration of the aging inhibitor used in the present invention is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l.
- the other concentration ranges can be changed, for example, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 to 10 ⁇ mol / l, about 0.01 to 10 ⁇ mol / l, about 0.05 to 10 ⁇ mol / l, about 0.075 to 10 ⁇ mol / l, about 0.1 to 10 ⁇ mol / l, about 0.5 to 10 ⁇ mol / l, about 0.75-10 ⁇ mol / l, about 1.0-10 ⁇ mol / l, about 1.25-10 ⁇ mol / l, about 1.5-10 ⁇ mol / l, about 1.75-10 ⁇ mol / l, about 2.0-10 ⁇
- the aging inhibitor used in the present invention comprises a p38 MAP kinase inhibitor.
- one type of p38 MAP kinase inhibitor can be included alone, or several types can be used in combination as required.
- the concentration of the p38 MAP kinase agent used in the present invention is usually about 0.1 to 100 ⁇ mol / l, preferably about 0.1 to 30 ⁇ mol / l, more preferably about 1 ⁇ mol / l.
- the other concentration ranges can be appropriately changed, for example, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 ⁇ 10 ⁇ mol / l, about 0.01-10 ⁇ mol / l, about 0.05-10 ⁇ mol / l, about 0.075-10 ⁇ mol / l, about 0.1-10 ⁇ mol / l, about 0.5-10 ⁇ mol / l, About 0.75 to 10 ⁇ mol / l, about 1.0 to 10 ⁇ mol / l, about 1.25 to 10 ⁇ mol / l, about 1.5 to 10 ⁇ mol / l, about 1.75 to 10 ⁇ mol
- the aging inhibitor used in the present invention is SB203580 (4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine). including.
- the present invention relates to SB431542 (4- [4- (1,3-benzodioxol-5-yl) 2-pyridinyl) -1H-imidazol-2-yl] benzamide) and SB203580 ( And 4- [4- (4-fluorophenyl) -2- (4-methylsulfinylphenyl) -1H-imidazol-5-yl] pyridine).
- the combination of these two drugs improves the culture while maintaining normalization, increasing the growth rate and sufficient cell density.
- the culture normalizing agent of the present invention further comprises a cell adhesion promoter.
- a cell adhesion promoter used in the present invention, any drug may be used as long as it is a drug capable of promoting cell adhesion.
- the cell adhesion promoter used in the present invention is 1- (5-isoquinolinesulfonyl) homopiperazine or a salt thereof (for example, fasudil (1- (5-isoquinolinesulfonyl) homopiperazine)), ( +)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexanecarboxamide or a salt thereof (for example, Y-27632 ((R)-(+)-trans- (4-pyridyl)- 4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate)) and the like.
- fasudil (1- (5-isoquinolinesulfonyl) homopiperazine
- +)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexanecarboxamide or a salt thereof
- the adhesion promoter that can be used in the present invention can be added to a culture normalizing agent or a medium such as a culture solution when corneal endothelial cells are cultured in a test tube.
- a Rho kinase inhibitor By adding a Rho kinase inhibitor to the culture normalizing agent or medium and continuing the culture, the Rho kinase inhibitor and the corneal endothelial cell come into contact with each other in vitro, and adhesion of the corneal endothelial cell is promoted.
- Examples of the medium that can be used in the present invention include a medium usually used for culturing endothelial cells (for example, DMEM (GIBCO BRL)), serum (for example, fetal bovine serum (FBS)), growth factor (for example, basic (b -) FGF), antibiotics (eg penicillin, streptomycin) and the like.
- DMEM fetal bovine serum
- FBS fetal bovine serum
- growth factor for example, basic (b -) FGF
- antibiotics eg penicillin, streptomycin
- Rho kinase inhibitor in the culture component of the present invention, cell adhesion is prevented by enhancing adhesion of corneal endothelial cells, and formation of a corneal endothelial cell layer having good cell morphology and high cell density is achieved.
- it is suitably used in the method for producing the corneal endothelial preparation of the present invention described in the present specification.
- the culture medium of the present invention is also used for maintaining corneal endothelial cells.
- the culture normalizing agent of the present invention may further contain a Rho kinase inhibitor.
- the Rho kinase inhibitor included in the present invention is as described above.
- the “corneal preservation solution” is a solution for preserving corneal endothelial cells that have been extracted or proliferated or preserved during the period until transplantation to a recipient. .
- the culture normalizing agent of the present invention may be used as a corneal preservation solution.
- a corneal preservation solution to which the culture normalizing agent of the present invention can be added a preservation solution usually used at the time of corneal transplantation (Optisol GS: registered trademark), an eye preservation solution for corneal transplantation (EPII) : Registered trademark)), physiological saline, phosphate buffered saline (PBS), and the like.
- Rho kinase inhibitor one type of Rho kinase inhibitor can be included alone, or several types can be used in combination as required.
- the concentration of the Rho kinase inhibitor in the present invention is usually 1 to 100 ⁇ mol / l, preferably 5 to 20 ⁇ mol / l, more preferably 10 ⁇ mol / l, and can be changed as appropriate when several types are used.
- the concentration range is, for example, usually about 0.001 to 100 ⁇ mol / l, preferably about 0.01 to 75 ⁇ mol / l, about 0.05 to 50 ⁇ mol / l, about 1 to 10 ⁇ mol / l, about 0.01 ⁇ 10 ⁇ mol / l, about 0.05-10 ⁇ mol / l, about 0.075-10 ⁇ mol / l, about 0.1-10 ⁇ mol / l, about 0.5-10 ⁇ mol / l, about 0.75-10 ⁇ mol / l, About 1.0 to 10 ⁇ mol / l, about 1.25 to 10 ⁇ mol / l, about 1.5 to 10 ⁇ mol / l, about 1.75 to 10 ⁇ mol / l, about 2.0 to 10 ⁇ mol / l, about 2.5 to 10 ⁇ mol / l, approx.
- 75-1.0 ⁇ mol / l, about 0.09-35 ⁇ mol / l, about 0.09-3.2 ⁇ mol / l, more preferably about 0.05-1.0 ⁇ mol / l, about 0.075- Examples include 1.0 ⁇ mol / l, about 0.1 to 1.0 ⁇ mol / l, about 0.5 to 1.0 ⁇ mol / l, and about 0.75 to 1.0 ⁇ mol / l. But it is not limited to, et al.
- the present invention prevents corneal transformation and enables a normal culture, or prevents detachment of cells by enhancing adhesion of corneal endothelial cells, and has good cell morphology and high cell density.
- a corneal preservation solution used for organ transplantation and the like.
- the culture normalizing agent of the present invention is also used as a preservation solution or a component thereof for cryopreserving corneal endothelial cells.
- glycerol, dimethyl sulfoxide, propylene glycol, acetamide or the like may be further added to the preservation solution of the present invention.
- a plurality of drugs can be used separately as the culture normalizing agent.
- the fibrosis inhibitor is always present during the culturing of the corneal endothelial cell, whereas the adhesion promoter is present for a certain period of time and then once depleted of the adhesion promoter, Again, the cell adhesion promoter can be present for a period of time.
- both the fibrosis inhibitor and the cell adhesion promoter can always be present during the culture of the corneal endothelial cells.
- the corneal endothelial cells cultured with the culture normalizing agent of the present invention are derived from primates. In a preferred embodiment, the corneal endothelial cells cultured with the culture normalizing agent of the present invention are human.
- the culture targeted by the present invention is a cell culture for the prevention or treatment of corneal endothelial injury.
- the present invention provides a medium for normally culturing corneal endothelial cells, comprising the culture normalizing agent of the present invention and a culture component of corneal endothelium.
- the culture normalizing agent used in the culture medium of the present invention can be in any form described herein.
- the culture component that can be used in the present invention may be any component that can be used for corneal endothelium culture, and may be a medium component that has been sold and used conventionally, or Alternatively, it may be a component separately developed for corneal endothelium. Examples of such medium components include, but are not limited to, OptiMEM, DMEM, M199, MEM and the like (available from INVITROGEN and the like).
- the present invention provides a method for normally culturing corneal endothelial cells, comprising the step of culturing corneal endothelial cells using the culture normalizing agent of the present invention or the medium of the present invention.
- the culture normalizing agent used in the method of the present invention can be in any form described herein.
- any component can be used as long as it can be used for corneal endothelium culture (in the medium for normal culture of corneal endothelial cells). What has been described can be exemplified.
- FIG. For example, in one exemplary culture method.
- a plurality of agents can be used separately.
- the fibrosis inhibitor is always present during the culture of the corneal endothelial cells, while the adhesion promoter is used for a certain period (for example, 24 hours to 72 hours, or 48 hours, etc.), then the adhesion promoter is deleted once again, and the cell adhesion promoter is used again for a certain period of time (for example, 24 hours to 72 hours, 48 hours, etc.) This period may vary each time or may be the same).
- this exemplary culture method is shown at the bottom of FIG.
- a fibrosis inhibitor can always be present during the culture of the corneal endothelial cells.
- the culture normalizing agent used includes both a fibrosis inhibitor and the cell adhesion promoter, and these are always present during the culturing of the corneal endothelial cells. it can.
- the corneal endothelial cells cultured with the culture normalizing agent of the present invention are derived from primates. In a preferred embodiment, the corneal endothelial cells cultured with the culture normalizing agent of the present invention are human.
- the culture targeted by the method of the present invention is a cell culture for the prevention or treatment of corneal endothelial injury, and can be used to produce cells or tissues for transplantation in particular.
- the present invention provides corneal endothelial cells cultured by the method of the present invention.
- the present invention is a cell that does not become fibrotic and does not lose its normal function even if it is subcultured after normal culture. The most important property is that it has a normal corneal endothelium property. Therefore, since the corneal endothelial cells provided by the present invention can be provided as a preparation, the present invention provides a corneal endothelial preparation.
- the present invention provides a method for producing a corneal endothelial preparation comprising the step of culturing corneal endothelial cells using a culture solution containing the culture normalizing agent of the present invention.
- the corneal endothelial preparation of the present invention contains a base material and a corneal endothelial cell layer cultured in a test tube on the base material.
- the substrate used in the present invention is not particularly limited as long as it supports a cultured corneal endothelial cell layer and can maintain its shape in vivo for a certain period of time, preferably at least 3 days after transplantation.
- the base material used in the present invention may have a role as a scaffold when corneal endothelial cells are cultured in a test tube, and only serves to carry a corneal endothelial cell layer after culture. You may have.
- the substrate used in the present invention is used for culturing corneal endothelial cells and has a role as a scaffold that can be directly used for transplantation after completion of the culture.
- Examples of the substrate used in the present invention include polymer materials derived from natural products such as collagen, gelatin, and cellulose, synthetic polymer materials such as polystyrene, polyester, polycarbonate, and poly (N-isopropylacrylamide), and polylactic acid. And biodegradable polymer materials such as polyglycolic acid, hydroxyapatite, and amniotic membrane.
- the shape of the substrate used in the present invention is not particularly limited as long as it supports the corneal endothelial cell layer and is suitable for transplantation, but is preferably a sheet.
- the preparation of the present invention is in the form of a sheet, it can be used by cutting into a size suitable for the application site at the time of transplantation. It is also possible to insert the sheet from the wound after rounding the sheet small.
- a preferable specific example is a circular shape covering about 80% of the area of the damaged corneal endothelium. It is also preferable to make a cut in this circular periphery so that it can be in close contact with the application site.
- an example of a substrate used in the present invention is collagen.
- collagen the collagen sheet of Unexamined-Japanese-Patent No. 2004-24852 can be used conveniently.
- Such a collagen sheet can be prepared, for example, from amniotic membrane according to the method described in JP-A-2004-24852.
- preparation of a corneal endothelial cell layer will be described as an example of a corneal endothelial preparation.
- the corneal endothelial cell layer used in the present invention preferably has at least one of the following characteristics. More preferably, it comprises two or more of the following features, and even more preferably all.
- the cell layer has a single layer structure. This is one of the features of a living corneal endothelial cell layer.
- the cell density in the cell layer is about 1,000 to about 4,000 cells / mm 2 . In particular, when an adult is a recipient (transplanter), it is preferably about 2,000 to about 3,000 cells / mm 2 .
- the planar view shape of the cell which comprises a cell layer is a substantially hexagon. This is one of the characteristics of the cells constituting the corneal endothelial cell layer in the living body.
- the preparation of the present invention is similar to a corneal endothelial cell layer in a living body, exhibits functions similar to those of a natural corneal endothelial cell layer, and can also exhibit proliferation ability in vivo.
- (4) Cells are regularly arranged in the cell layer.
- the cells constituting it are regularly arranged, and this maintains the normal function and high transparency of the corneal endothelial cell, and the water control function of the cornea is properly exhibited. It is considered. Therefore, by providing such morphological features, the preparation of the present invention is expected to exhibit the same function as the corneal endothelial cell layer in a living body.
- the production method of the present invention includes a step of culturing corneal endothelial cells using the culture normalizing agent or medium of the present invention, and can be carried out, for example, by the following method.
- Corneal endothelial cells are collected in a conventional manner from the recipient's own cornea or the cornea of an appropriate donor. Considering the transplantation conditions in the present invention, allogeneic corneal endothelial cells may be prepared. For example, after detaching the Descemet's membrane and endothelial cell layer of corneal tissue from the corneal stroma, it is transferred to a culture dish and treated with dispase or the like. As a result, corneal endothelial cells are detached from the Descemet's membrane. Corneal endothelial cells remaining on the Descemet's membrane can be removed by pipetting or the like.
- corneal endothelial cells are cultured in the culture medium of the present invention.
- the medium or culture solution include commercially available DMEM (Dulbecco's Modified Eagle's Medium) (for example, INVITROGEN, catalog number: 12320) and FBS (fetal calf serum) (for example, BIOWEST, catalog number: S1820-500). ), B-FGF (basic fibroblast growth factor) (for example, INVITROGEN, catalog number: 13256-029), and antibiotics such as penicillin and streptomycin are added as appropriate, and the components of the culture normalizing agent of the present invention What added can be used.
- DMEM Dulbecco's Modified Eagle's Medium
- FBS fetal calf serum
- BIOWEST fetal calf serum
- B-FGF basic fibroblast growth factor
- antibiotics such as penicillin and streptomycin
- a culture container (culture dish) whose surface is coated with type I collagen, type IV collagen, fibronectin, laminin, or an extracellular matrix of bovine corneal endothelial cells.
- an ordinary culture vessel treated with a commercially available coating agent such as FNC coating mix (registered trademark) (50 ml (AES-0407), ATHENA, catalog number: 0407) may be used. This is because, by using such a coating in combination with the culture solution of the present invention, adhesion of corneal endothelial cells to the surface of the culture container is promoted, and favorable growth is performed.
- the temperature conditions for culturing the corneal endothelial cells are not particularly limited as long as the corneal endothelial cells grow. For example, about 25 ° C. to about 45 ° C., and considering the proliferation efficiency, preferably about 30 ° C. to about 40 ° C. More preferably, it is about 37 ° C.
- the culture method is carried out in a normal cell culture incubator under humidification in an environment with a CO 2 concentration of about 5 to 10%.
- Subculture can be performed after the corneal endothelial cells subjected to the culture have proliferated. Preferably, subculture is performed when sub-confluent or confluent. Subculture can be performed as follows. First, the cells are detached from the surface of the culture container by treating with trypsin-EDTA or the like, and then the cells are recovered. The culture normalizing agent or medium of the present invention is added to the collected cells to obtain a cell suspension. Centrifugation is preferably performed when cells are collected or after collection. A cell suspension having a high cell density can be prepared by such centrifugation treatment. A preferred cell density is about 1-2 ⁇ 10 6 cells / mL.
- examples of the conditions for the centrifugal treatment include 500 rpm (30 g) to 1000 rpm (70 g) and 1 to 10 minutes.
- the cell suspension is seeded in a culture vessel in the same manner as in the initial culture described above and used for culture.
- the dilution factor at the time of passage varies depending on the state of the cells, it is about 1: 2 to 1: 4, preferably about 1: 3.
- Subculture can be performed under the same culture conditions as the above-mentioned initial culture.
- the culture time varies depending on the state of the cells used, but is, for example, 7 to 30 days.
- the above subculture can be performed multiple times as necessary. If a cell adhesion promoter is used in the culture normalizing agent or medium of the present invention, the culture period can be shortened by enhancing cell adhesion at the initial stage of culture.
- ⁇ 3> Preparation of Corneal Endothelial Cell Layer
- the cell suspension is seeded on a base material such as a collagen sheet and subjected to culture.
- the number of cells to be seeded is adjusted so that a cell layer having a desired cell density is formed in the corneal endothelial preparation finally produced.
- the cells are seeded so that a cell layer having a cell density of about 1,000 to about 4,000 cells / mm 2 is formed.
- the culture can be performed under the same conditions as in the initial culture. Although the culture time varies depending on the state of the cells used, it is, for example, 3 to 30 days.
- a corneal endothelial preparation in which a corneal endothelial cell layer cultured in a test tube is formed on a base material is obtained.
- the corneal endothelial preparation may contain the culture normalizing agent of the present invention or a medium containing the same in order to maintain corneal endothelial cells.
- the corneal endothelial preparation may contain the culture normalizing agent of the present invention or a medium containing the same before being used for transplantation.
- the present invention also provides a combination of a corneal endothelial preparation and the culture normalizing agent of the present invention or a medium containing the same.
- the corneal endothelium preparation obtained by the production method of the present invention is a corneal endothelium caused by diseases requiring transplantation of the corneal endothelium, such as bullous keratopathy, corneal edema, corneal vitiligo, in particular corneal dystrophy, trauma or intraocular surgery. It can be used as a graft in the treatment of bullous keratopathy caused by a disorder. Examples of causes of bullous keratopathy and corneal endothelial dysfunction include Fuchs corneal endothelial dystrophy, false desquamation syndrome, corneal endotheliitis and the like in addition to surgery.
- Examples of administration targets of the corneal endothelial preparation of the present invention include mammals (eg, humans, mice, rats, hamsters, rabbits, cats, dogs, cows, sheep, monkeys, etc.), preferably primates (eg, humans). It is.
- the present invention includes a corneal endothelial cell produced by a method for normally culturing corneal endothelial cells, comprising the step of culturing corneal endothelial cells using the culture normalizing agent of the present invention or the medium of the present invention, Provided is a medicament for the treatment or prevention of corneal endothelial disease, disorder or condition.
- the medium or culture normalizing agent of the present invention can use any form described herein, for example, (culture normalizing agent), (medium for normal culture of corneal endothelial cells ), (Method of culturing corneal endothelial cells normally) can be taken into consideration.
- corneal endothelial cells used as pharmaceuticals can take any form used in the present specification. Can do.
- the medicament of the present invention is intended for the treatment or prevention of primate corneal endothelium.
- the subject of treatment or prevention is human corneal endothelium.
- the corneal endothelial cells used in the medicament of the present invention are derived from primates.
- the corneal endothelial cell used in the medicament of the present invention is derived from a human.
- the corneal endothelial disease, disorder or condition targeted by the medicament of the present invention is bullous keratopathy, corneal endotheliitis, corneal edema, corneal vitiligo and the like.
- the medicament of the present invention is provided in the form of a sheet or a suspension.
- the medicament of the present invention further comprises a cell adhesion promoter.
- the cell adhesion promoter exerts an adhesion promoting action on corneal endothelial cells separated from corneal tissue or separated and passaged corneal endothelial cells.
- This cell adhesion promoter can be provided together with or separately from corneal endothelial cells provided as a medicament.
- the cell adhesion promoter used in the medicament of the present invention can include a Rho kinase inhibitor. Examples of Rho kinase inhibitors include the following documents: US Pat. No. 4,678,783, Patent No. 3,342,217, International Publication No.
- Such a compound can be produced by a method described in each disclosed document, for example, 1- (5-isoquinolinesulfonyl) homopiperazine or a salt thereof (for example, fasudyl (1- (5-isoquinolinesulfonyl) homopiperazine).
- (+)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexanecarboxamide or a salt thereof eg, Y-27632 ((R)-(+)-trans- (4 -Pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate)
- Y-27632 ((R)-(+)-trans- (4 -Pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate
- Examples of administration (transplantation) subjects of the pharmaceutical or method of the present invention include clear milk animals (eg, humans, mice, rats, hamsters, rabbits, cats, dogs, cows, horses, sheep, monkeys, etc.), but primates. Are preferred, and humans are particularly preferred.
- the corneal endothelium treatment in primates has not achieved satisfactory results so far, and in this sense, the present invention provides an innovative treatment method and medicine.
- the present invention relates to a cornea produced by a method for normally culturing corneal endothelial cells, comprising the step of culturing corneal endothelial cells using the culture normalizing agent of the present invention or the medium of the present invention.
- the present invention provides a medicament for the treatment or prevention of human corneal endothelial disease, disorder or condition, comprising a cell adhesion promoter.
- a cell adhesion promoter comprising a cell adhesion promoter.
- the adhesion promoting action of the cell adhesion promoter on corneal endothelial cells separated from corneal tissue or separated and passaged corneal endothelial cells is used.
- the cell adhesion promoter used in the medicament of the present invention may include a Rho kinase inhibitor. Examples of Rho kinase inhibitors include the following documents: US Pat. No. 4,678,783, Japanese Patent No. 3,342,217, International Publication No. 95/28387, International Publication No. 99/20620, International Publication No.
- Such a compound can be produced by a method described in each disclosed document, for example, 1- (5-isoquinolinesulfonyl) homopiperazine or a salt thereof (for example, fasudyl (1- (5-isoquinolinesulfonyl) homopiperazine).
- (+)-Trans-4- (1-aminoethyl) -1- (4-pyridylcarbamoyl) cyclohexanecarboxamide or a salt thereof eg, Y-27632 ((R)-(+)-trans- (4 -Pyridyl) -4- (1-aminoethyl) -cyclohexanecarboxamide dihydrochloride monohydrate)
- the present invention is the first to achieve good therapeutic results using cell adhesion promoters in primate models and cases using human cells.
- a medicament containing the cell adhesion promoter of the present invention is produced by a method for normally culturing corneal endothelial cells, comprising the step of culturing corneal endothelial cells using the culture normalizing agent of the present invention or the medium of the present invention. Used with cultured corneal endothelial cells.
- the medicament containing the cell adhesion promoter of the present invention may be administered or transplanted together with the corneal endothelial cells, or may be administered or transplanted separately.
- the corneal endothelial disease, disorder or condition targeted by the medicament containing the cell adhesion promoter of the present invention is bullous keratopathy, corneal endotheliitis, corneal edema, corneal vitiligo and the like.
- the present invention provides a method for the treatment or prevention of a human corneal endothelial disease, disorder or condition comprising the step of administering a cell adhesion promoter to a subject in need of treatment or prevention.
- the subject of administration (transplantation) of the medicament or method of the present invention is a clear mammal (for example, human, mouse, rat, hamster, rabbit, cat, dog, cow, horse, sheep, Monkeys, etc.), primates are preferred, and humans are particularly preferred.
- the corneal endothelium treatment in primates has not achieved satisfactory results so far, and in this sense, the present invention provides an innovative treatment method and medicine.
- Cell adhesion promotion for use in a medicament for treating or preventing a corneal endothelial disease, disorder or condition, comprising a medicament comprising the cell adhesion promoter of the present invention or a corneal endothelial cell produced using the method of the present invention
- concentration at which the agent or Rho kinase inhibitor is used is not limited, but is usually about 0.00001 to 1 w / v%, preferably about 0.00001 to 0.1 w / v%, more preferably about 0.
- 0.05 w / v% about 0.001 to 0.05 w / v%, about 0.002 to 0.05 w / v%, about 0.003 to 0.05 w / v%, about 0.004 ⁇ 0.05 w / v%, about 0.005 to 0.05 w / v%, about 0.006 to 0.05 w / v%, about 0.007 to 0.05 w / v%, about 0.008 to 0 .05 w / v%, about 0.009 to 0.05 w / v%, about 0.01 to 0.0 5 w / v%, about 0.02 to 0.05 w / v%, about 0.03 to 0.05 w / v%, about 0.04 to 0.05 w / v%, about 0.003 to 0.04 w / v%, about 0.004 to 0.04 w / v%, about 0.005 to 0.04 w / v%,
- the active ingredient is preferably about 0.0001 to 0.1 w / v%, preferably Is a preparation containing about 0.003 to 0.03 w / v%, 1 to 10 times per day, preferably 1 to 6 times, more preferably 1 to 3 times per day, about 0.01 to 0. 1 mL can be administered.
- a concentration of 1/10 to 1000 times the above concentration can be used.
- a person skilled in the art can appropriately select the type and concentration of the cell adhesion promoter depending on the disease state.
- Cynomolgus monkey corneal endothelial cells (Materials and methods) Cynomolgus monkey corneal endothelial cells (MCEC; source and culture method): MCECs were cultured with a modified protocol previously described [Koizumi N, et al. (2007) Invest Ophthalmol Vis Sci 48: 4519-4526], [Li W, et al. (2007) Invest Ophthalmol Vis Sci 48: 614-620].
- a cynomolgus monkey eyeball euthanized for another purpose was purchased (Nissei Bilis Co., Ltd., Ohtsu, Japan and Keari Co., Ltd., Wakayama, Japan) (method described above) Then, the Descemet's membrane containing corneal endothelial cells was detached, the corneal endothelial cells were mechanically detached together with the basement membrane, and primary culture was performed after treatment with dispase or collagenase (ROCHE catalog number: 10 103 586 001). Typically, 1 mg / mL collagenase A (Roche Applied Science, Penzberg, Germany) was used for 2 hours at 37 ° C.
- the medium used was DMEM (INVITROGEN catalog number 12320) supplemented with 10% FBS (BIOWEST, catalog number: S1820-500) and 2 ng / ml basic FGF (INVITROGEN, catalog number: 13256-029).
- FBS biOWEST, catalog number: S1820-500
- 2 ng / ml basic FGF INVITROGEN, catalog number: 13256-029.
- FNC Coating MIX registered trademark
- MCEC was cultured in a humidified atmosphere at 37 ° C. in 5% CO 2 and the culture medium was changed every two days.
- MCEC reaches confluence in 10-14 days, these, Ca 2+ and Mg 2+ free Dulbecco's were rinsed in phosphate buffered saline (PBS), 5 minutes with 0.05% trypsin at 37 ° C. - Trypsinized with EDTA (Life Technologies) and passaged at a ratio of 1: 2-4.
- SB431542 Merck Millipore, Billerica, Mass.
- TGF- ⁇ transforming growth factor- ⁇
- the Descemet's membrane containing corneal endothelial cells is exfoliated, and the corneal endothelial cells are mechanically exfoliated together with the basement membrane, and collagenase (ROCHE catalog number: 10 103 586 001) (typically treated with 1 mg / mL collagenase A (Roche Applied Science) at 37 ° C. for 2 hours), and then primary culture was performed.
- collagenase typically treated with 1 mg / mL collagenase A (Roche Applied Science) at 37 ° C. for 2 hours
- the medium is Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN catalog number: 31985-070) + 8% fetal bovine serum (FBS) (BIOEST, catalog number: S1820-500) + 200 mg / ml CaCl 2 ⁇ 2H 2 O (SIGMA catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA catalog number: C9819-5G) +20 ⁇ g / ml ascorbic acid (SIGMA catalog number: A4544-25G) +50 ⁇ g / ml gentamicin (INVITROGEN catalog number: 15710-064 ) +5 ng / ml EGF (INVITROGEN catalog number: PHG0311) conditioned for 3T3 feeder cells It was.
- FBS fetal bovine serum
- HCEC obtained from individual corneas were resuspended in culture medium and plated into 1 well of a 12-well plate coated with FNC Coating Mix®. .
- the culture medium was prepared according to published protocols with some modifications. Briefly, OptiMEM-I (Life Technologies), 8% FBS, 5 ng / mL epidermal growth factor (EGF) (Sigma-Aldrich Co., St.
- HCEC was cultured in a humidified atmosphere at 37 ° C. in 5% CO 2 and the culture medium was changed every two days. When HCECs reached confluence in 14-28 days, they were rinsed in Ca 2+ and Mg 2+ free PBS, trypsinized with 0.05% trypsin-EDTA for 5 minutes at 37 ° C., and 1: Passage at a ratio of 2.
- SB431542 (Merck Millipore), neutralizing antibody against TGF- ⁇ (R & D Systems, Inc., Minneapolis, MN), Smad3 inhibitor (Merck Millipore) and bone morphogenetic protein (BMP) BMP-7 (R & D Systems), anti-fibroblasts Cell-like effects were examined.
- -Cell observation method such as staining (histological examination): Cell observation was performed with a phase contrast microscope. In addition, after cells were fixed, immunostaining was performed using ZO-1, Na + / K + -ATPase as a function-related marker, and observation was performed with a fluorescence microscope.
- cultured MCEC or HCEC were placed in Lab-Tek TM Chamber Slides TM (NUNC A / S, Roskilde, Denmark), fixed with 4% formaldehyde for 10 minutes at room temperature (RT), and 1% bovine Incubated with serum albumin (BSA) for 30 minutes.
- cultured MCEC or HCEC on Lab-Tek TM Chamber Slides TM (NUNC A / S, Roskilde, Denmark) was fixed in 4% formaldehyde for 10 minutes at room temperature and with 1% bovine serum albumin (BSA) Incubated for 30 minutes.
- ZO-1 Zymed Laboratories, Inc., South San Francisco, Calif.
- a tight junction-related protein Na + / K + -ATPase (Upstate Biotec), a protein related to pump function. , Inc., Lake Placid, NY)
- immunohistochemical analysis of fibronectin BD, Franklin Lakes, NJ
- fibronectin and type 1 collagen was used to do this.
- Staining of ZO-1, Na + / K + -ATPase, type 1 collagen and fibronectin uses a 1: 200 dilution of ZO-1 polyclonal antibody, Na + / K + -ATPase monoclonal antibody, and fibronectin monoclonal antibody, respectively. Carried out. Secondary antibodies used were Alexa Fluor® 488 labeled or 1: 2000 dilution of Alexa Fluor® 594 labeled goat anti-mouse IgG (Life Technologies). Actin staining was performed using a 1: 400 dilution of Alexa Fluor® 488-labeled phalloidin (Life Technologies).
- the cell nuclei were then stained with DAPI (Vector Laboratories, Inc., Burlingame, CA) or PI (Sigma-Aldrich). The slides were then observed with a fluorescence microscope (TCS SP2 AOBS; Leica Microsystems, Welzlar, Germany).
- DAPI Vector Laboratories, Inc., Burlingame, CA
- PI Sigma-Aldrich
- FIG. 1 shows the results of culturing by conventional cell culture methods in cynomolgus monkeys and humans. As is apparent from the culture results, monkeys and human corneal endothelium are transformed by the usual culture method, that is, all cells are fibrotic, and are different from normal cells that are polygonal single-layer cells. It can be seen that it is in an unsuitable state for transplantation.
- Comparative Example 2 Comparative Example 2
- an experiment was conducted to show that normal function is lost when cultured by the conventional technique.
- whether or not monkey corneal endothelium loses expression of function-related protein was demonstrated by immunostaining and Western blotting and real-time PCR. The details are shown below.
- phosphatase inhibitor cocktail 2 Sigma-Aldrich
- protease inhibitor cocktail Nacalai Tesque, Kyoto
- BCA PROTEIN ASSAY KIT manufactured by PIERCE (catalog number: 23227)
- Tris-buffered saline (10 mM Tris-HCl, pH 7 supplemented with 0.1% (vol / vol) polyethylene sorbitan monolaurate (Nacalai Tesque, catalog number: 28353-85) (TBS-T) and 10% fetal calf serum .4; 100 mM NaCl) for 1 hour for blocking.
- Rabbit anti-human ZO-1 antibody (1: 200) and mouse anti-human Na + / K + -ATPase antibody (1: 200) were used as primary antibodies and reacted at room temperature for 1 hour.
- An antibody against fibronectin and an antibody against collagen type 1 were used in the same manner.
- a dilution ratio of 1: 200 or 1: 1000 was used as appropriate.
- the separated protein was transferred to a PVDF membrane (manufactured by PALL LIFE SCIENCE (catalog number: EH-2222)). 0.1% (vol / vol) polyethylene sorbitan monolaurate (Nacalai Tesque, catalog number: 28353-85) supplemented with 5% non-fat dry milk (5% NON FAT DRY MILK, CELL SIGNALING, catalog number: 9999) Blocking was performed by incubating the blotted membrane with Tris-buffered saline solution (10 mM Tris-HCl, pH 7.4; 100 mM NaCl) (TBS-T) for 1 hour.
- Tris-buffered saline solution 10 mM Tris-HCl, pH 7.4; 100 mM NaCl
- ZO-1 antibody and Na + / K + -ATPase antibody diluted 1000 times with TBS-T supplemented with 5% non-fat dry milk were immersed in a membrane and reacted at room temperature for 1 hour. After washing 3 times with TBS-T, it was incubated with a mouse-IgG antibody HRP complex (CELL SIGNALING (catalog number: 7074P2)), washed, and then ECL-ADVAVCE Western Blotting Detection Kit (GE Healthcare Japan (catalog)) No .: RPN2135V)).
- An antibody against fibronectin and an antibody against collagen type 1 were used in the same manner.
- RNA samples were exposed by ECL Advance Western Blotting Detection Kit (GE Healthcare, Piscataway, NJ) and then examined using the LAS4000S imaging system (Fuji Film Co., Tokyo).
- Real-time PCR (semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR)): Also, a PCR method for Na + / K + -ATPase, ZO-1, and GAPDH was performed by the following method. The primer used was purchased from INVITROGEN, an oligonucleotide synthesis company, and desalted.
- RNA levels of Na + / K + -ATPase and ZO-1 were examined by a semiquantitative PCR method.
- RNEasy QIAGEN, catalog number: 74106
- the extracted RNA is subjected to reverse transcription reaction (42 ° C., 60 minutes) by RiverTra Ace (TOYOBO (catalog number: TRT-101)), and GAPDH is internally contained by TAKARA Taq HotStart Version (Takara Bio, catalog number: RR001A).
- Na + / K + -ATPase and ZO-1 were amplified as standards.
- the same amount of cDNA was amplified by a PCR machine (GeneAmp 9700; Applied Biosystems) and the following primer pair. The following primers were used for the PCR reaction. The following primers were also used in the same manner for PCR reactions against antibodies against fibronectin, collagen type 1, type 4, integrin ⁇ 5, and integrin beta1.
- the amplified DNA fragment was electrophoresed on a 1.5% agarose gel (Nacalai Tesque, catalog number: 01149-76) and detected by staining with ethidium bromide (Nacalai Tesque, catalog number: 14603-51).
- PCR was performed using the following TaqMan (registered trademark) (Invitrogen) primers.
- Collagen type 1 Hs00164004_m1; Fibronectin: Hs01554976_m1; GAPDH: Hs00266705_g1.
- PCR was performed using a StepOne TM (Applied Biosystems) real-time PCR system. GAPDH was used as an internal standard.
- primate CEC in culture showed two different phenotypes as determined by cell morphology and characteristic contact-inhibited phenotypes. Approximately 60% of the cells maintained a characteristic polygonal cell morphology and contact-inhibited phenotype, and these cells were referred to as normal phenotypes. On the other hand, 40% of cells showed a fibroblast-like shape with multiple layers, and these cells were referred to as a fibroblast-like phenotype (FIG. 1).
- FIG. 2A shows that fibroblast primate CEC produces an abnormal extracellular matrix, ie, it loses normal function when cultured with the prior art.
- A Expression of fibronectin and collagen type 1 in the fibroblast phenotype and normal cell phenotype. The upper row shows fibronectin and the lower row shows collagen type 1. The left side shows the normal cell phenotype and the right side shows the fibroblast phenotype. The fibroblast phenotype showed an excess of extracellular matrix such as fibronectin and collagen type 1. On the other hand, the normal cell phenotype completely lost staining ability.
- B Western blot of protein expression in fibronectin fibroblast phenotype and normal cell phenotype. GAPDH is a control.
- Fibronectin protein expression levels were strongly up-regulated in the fibroblast phenotype than in the normal phenotype.
- C Semi-quantification of collagen type 1, type 4, type 8 fibronectin, integrin ⁇ 5, and integrin ⁇ 1 (listed in order from the top) in fibroblast phenotype (right) and normal cell phenotype (left). The result of PCR is shown. GAPDH is a control.
- type 1 collagen transcript ⁇ 1 (I) mRNA
- ⁇ 1 (I) mRNA type 1 collagen transcript ( ⁇ 1 (I) mRNA) was abundantly expressed in the fibroblast phenotype, whereas in the normal phenotype, ⁇ 1 (I) mRNA expression was It was decreasing.
- the fibroblast phenotype showed a fibronectin fibrotic ECM staining pattern, whereas the normal phenotype fully demonstrated fibronectin staining ability.
- FIG. 2A Fibronectin protein levels were more strongly upregulated in the fibroblast phenotype than in the normal phenotype (FIG. 2A, B).
- Collagen type 1 produced by the fibroblast phenotype showed dual site expression and was seen in both ECM and cytoplasm.
- the cytoplasmic site of collagen type 1 appears to be in the Golgi complex and its intracellular localization is essential for secretion.
- collagen type 1 staining in the normal phenotype was not clearly observed (FIG. 2A).
- RT-PCR analysis was used to measure the expression of the major ECM proteins.
- Collagen type 1 transcript ( ⁇ 1 (I) mRNA) was found to be abundantly expressed in the fibroblast phenotype.
- ⁇ 1 (I) mRNA expression was negligible in the normal phenotype (FIG. 2C).
- the basement membrane collagen phenotypes ⁇ 1 (IV) mRNA and ⁇ I (VIII) mRNA were expressed in both normal and fibroblast phenotypes, The degree of expression was less in the normal phenotype than in the fibroblast phenotype.
- Fibronectin and integrin ⁇ 5 expression were observed in the fibroblast phenotype. Conversely, in the normal phenotype, these two transcripts were not expressed (C in FIG. 2A). On the other hand, ⁇ 1 integrin mRNA was expressed at similar levels in both normal and fibroblast phenotypes (C in FIG. 2A).
- Conditioned medium for 3T3 feeder cells 10% FBS (BIOWEST, catalog number: NIH3T3 cells in a 150 mm dish (FALCON, catalog number: 3025) coated with 0.1% gelatin (SIGMA, catalog number: G1890-500G) S1820-500) / DMEM (INVITROGEN, catalog number: 12320), and cultured until subconfluent. Subsequently, the cells are incubated with a final concentration of 0.04 mg / mL mitomycin C solution (Kyowa Hakko Kirin, catalog number 874231) at 37 ° C. in a 5% CO 2 incubator for 2 hours.
- Example 1 In this example, focusing on the fact that transformation is in a fibroblast-like form, Western blotting is used for the activation of pathways activated during the induction of fibrosis, which is known in general cell types. It examined in.
- Cynomolgus monkey corneal endothelial cells Purchasing cynomolgus monkey eyeballs euthanized for another purpose (Nissei Bilis Co., Ltd., Ohtsu, Japan and Keari Co., Ltd., Wakayama, Japan) It peeled mechanically with the basement membrane, peeled off from the basement membrane using dispase or collagenase, and then collected, followed by primary culture.
- monkey corneal endothelial cells may be cultured in a normal form as shown in FIG. 1, but they often change in a fibroblast-like shape by the same culture method, long-term culture, and subculture. . Therefore, cells that could be cultured in a normal form and cells that changed in shape like a fibroblast were collected and used for Western blotting.
- -Antibodies to pSmad2 those obtained from CELL SIGNALING (catalog number: 3108P) were used.
- -Antibodies to pSmad those obtained from CELL SIGNALING (catalog number: 5339P) were used.
- -Antibodies to pp38 those obtained from BD TRANSDUCTIONL LABORATORIES (same as p38a / SAPK2a, catalog number: 61168) were used.
- -Antibodies to p38 those obtained from BD TRANSDUCTIONL LABORATORIES (catalog number: 61280) were used.
- -Antibodies to pERK1 / 2 those obtained from BD TRANSDUCTIONL LABORATORIES (catalog number: 61358) were used.
- -Antibodies to ERK1 / 2 those obtained from BD TRANSDUCTIONL LABORATORIES (catalog number: 610030) were used.
- -Antibodies to pJNK those obtained from BD TRANSDUCTIONL LABORATORIES (catalog number: 610627) were used.
- -Antibodies to JNK those obtained from BD TRANSDUCTIONL LABORATORIES (catalog number: 61540) were used.
- FIG. 4 shows the results of Western blotting using monkey corneal endothelium for the activities of main pathways that can cause transformation of fibrosis.
- phosphorylation of Smad2 activation of TGF- ⁇ pathway
- activation of p38 MAPK activation of p38 MAPK
- JNK pathway phosphorylation of ERK1 / 2 was suppressed.
- Smad2, p38, ERK1 / 2 and JNK are all reportedly involved in the EMT pathway [Chen KH, et al. (1999) Invest Ophthalmol Vis Sci 40: 2513-2519], [Kim TY, et al.
- Example 2 Inhibition of transformation of corneal endothelium
- Cynomolgus monkey corneal endothelial cells Purchasing cynomolgus monkey eyeballs euthanized for another purpose (Nissei Bilis Co., Ltd., Ohtsu, Japan and Keari Co., Ltd., Wakayama, Japan) It peeled mechanically together with the basement membrane, peeled off the basement membrane using collagenase, and then collected, followed by primary culture.
- a basic medium for culture of monkey corneal endothelium (10% FBS (BIOWEST, catalog number: S1820-500) and 2 ng / ml basic FGF (INVITROGEN, catalog number: 13256-029) was added.
- DMEM (INVITROGEN, catalog number: 12320)) and 1 ⁇ mol / l SB431542 (TOCRIS, catalog number: 1614) added to the basic medium were used.
- the phase contrast image shows that the primate CEC cultured in the presence of SB431542 shows a true polygonal cell shape and a contact-inhibited monolayer, while the control CEC is fibroblast-like.
- Fig. 4A Those cultured in the control basal medium are transformed into fibroblast-like cells and show stratification, while the TGF- ⁇ signal is inhibited by a phosphorylation inhibitor of the receptor to reduce the size of the polygonal small and large immobility. It showed the same form as the living body and was able to suppress the transformation of monkey corneal endothelium.
- Example 3 Demonstration of maintenance of normal function of corneal endothelium
- a function-related protein of corneal endothelium is maintained as a demonstration of normalization of culture. Details are shown below.
- Example 2 Bacterials and methods
- -SB431542 obtained from TOCRIS (catalog number: 1614).
- -An antibody against Na + / K + -ATPase manufactured by MILLIPORE (catalog number: 05-369) was used.
- -Antibody to ZO-1 Mouse INVITROGEN (catalog number: 339100), rabbit ZYMED LABORATORIES (catalog number: 61-7300) were used.
- -Antibodies to GAPDH those manufactured by ABCAM (catalog number: ab36840) were used.
- Example 2 Cells cultured as in Example 2 were fixed, immunostained for Na + / K + -ATPase and ZO-1, and photographed with a fluorescence microscope.
- Western blotting method The Western blotting method for Na + / K + -ATPase, ZO-1, and GAPDH was performed in the same manner as in Example 1.
- Real-time PCR method Also, a PCR method for Na + / K + -ATPase, ZO-1, and GAPDH was performed by the following method. The primer used was purchased from INVITROGEN, an oligonucleotide synthesis company, and desalted.
- RNA levels of Na + / K + -ATPase and ZO-1 were examined by a semiquantitative PCR method.
- RNEasy QIAGEN, catalog number: 74106
- the extracted RNA was subjected to reverse transcription reaction (42 ° C., 60 minutes) by River Tra Ace (TOYOBO, catalog number: TRT-101), and GAPDH was internally stored by TAKARA Taq HotStart Version (Takara Bio, catalog number: RR001A).
- Na + / K + -ATPase and ZO-1 were amplified as standards.
- the following primers were used for the PCR reaction.
- the amplified DNA fragment was electrophoresed on a 1.5% agarose gel and detected by ethidium bromide staining.
- TGF- ⁇ may be a direct mediator of the endothelial-mesenchymal transition observed in primate CEC cultures.
- Example 4 Ability to lose normalization of TGF- ⁇
- TGF- ⁇ was added to induce transformation and loss of function-related protein (immunity). staining).
- Western blotting showed that TGF- ⁇ was added to induce transformation and loss of function-related protein. Details are shown below.
- TGF- ⁇ R & D SYSTEMS (catalog number: 240-B) was used.
- -An antibody against Na + / K + -ATPase manufactured by MILLIPORE (catalog number: 05-369) was used.
- -Antibody to ZO-1 Mouse INVITROGEN (catalog number: 339100), rabbit ZYMED LABORATORIES (catalog number: 61-7300) were used.
- -Antibodies to GAPDH those manufactured by ABCAM (catalog number: ab36840) were used.
- -Antibodies to pSmad2 those from CELL SIGNALING (catalog number: 3108P) were used.
- -Antibodies to pSmad those from CELL SIGNALING (catalog number: 5339P) were used.
- Culture method Monkey corneal endothelial cells were cultured to subconfluence, TGF- ⁇ 1 was added to the medium so that the final concentration was 0, 1, and 10 ng / mL, and the culture was cultured at 37 ° C. until changes in morphology appeared.
- -Dyeing method as in the above example.
- -Cell fraction extraction method as in the above example.
- Western blot method as in the above example.
- Example 5 Demonstration in human cells
- Corneal endothelial cells were mechanically detached together with the basement membrane from the research cornea purchased from Seattle Eye Bank, peeled off from the basement membrane using collagenase, and then subjected to primary culture.
- the medium is Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN, catalog number: 31985-070) + 8% FBS (BIOWEST, catalog number: S1820-500) +200 mg / ml CaCl 2 .2H 2 O (SIGMA, catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA, catalog number: C9819-5G) +20 ⁇ g / ml ascorbic acid (SIGMA, catalog number: A4544-25G) +50 ⁇ g / ml gentamicin (INVITROGEN, catalog number: 15710-064) +5 ng / Ml EGF (INVITROGEN, catalog number: PHG0311) conditioned for 3T3 feeder
- SB431542 has been demonstrated using various experiments to maintain HCEC function and suppress HCEC fibroblast-like changes. The results are shown in FIG. 9A.
- Blocking TGF receptor signaling by SB431542 enables Na + / K + -ATPase and ZO-1 to be subcellularly localized at the cell membrane, as shown in FIGS. 9A A and B. It became possible to maintain protein expression.
- the scale bar indicates 100 ⁇ m.
- the ELISA assay showed that SB431542 significantly downregulated secretion of collagen type 1 into the cell supernatant. ** P ⁇ 0.05.
- SB431542 was shown to significantly reduce collagen type 1 and fibronectin expression at the mRNA level.
- Example 6 Normalized culture of corneal endothelium by another method
- BMP-7 was used as a method other than SB431542 used in the above-described examples
- TGF- ⁇ signal could be antagonized and transformation of human corneal endothelium could be suppressed. The details are shown below.
- the culture was carried out in a medium in which BMP-7 (100 ng / ml) was added to the same conditioned medium, and the culture in the same conditioned medium as a control was compared. .
- BMP-7 100 ng / ml
- BMP-7 is known to be common as a factor related to the TGF- ⁇ signal, although SB431542 differs in other detailed transmission pathways. That is, TGF- ⁇ signaling pathways are broadly classified into Smad2 / 3 systems via ALK4, 5 or 7, and Smad1 / 5/8 systems via ALK1, 2, 3 or 6, both of which are fibrotic. It is well known that it is related to Therefore, it is understood that transformation of the corneal endothelium can be suppressed by substantially suppressing the overall TGF- ⁇ signal.
- TGF- ⁇ signaling pathways are broadly classified into the Smad2 / 3 system via ALK4 / 5/7 and the Smad1 / 5/8 system via ALK1 / 2/3/6, both of which are related to fibrosis (J. Massagu'e, Annu. Rev. Biochem.
- BMP-7 suppresses the change to HCEC fibroblast-like and maintains its function.
- BMP-7 promotes MET and specifically inhibits TGF- ⁇ -mediated epithelial-mesenchymal transition. This molecule is therefore used to antagonize the EMT process [ZeisbergM, et al. (2003) Nat Med 9: 964-968], [Simic P, et al. (2007) EMBO Rep 8: 327-331], [BuijsJT, et al. (2007) Am J Pathol 171: 1047-1057], [Zeisberg M, et al. (2007) J BiolChem 282: 23337-23347]. Therefore, we examined whether BMP-7 could antagonize the inevitable changes in HCEC. Fibroblast-like HCEC was treated with BMP-7 at concentrations ranging from 10 to 1000 ng / ml.
- FIG. 10A The results are shown in FIG. 10A.
- the elongated cell shape of the fibroblast phenotype was converted to a polygonal cell shape in response to the presence of BMP-7 in a concentration-dependent manner.
- the scale bar is 100 ⁇ m.
- B BMP-7 was observed in normal CEC [BarryPA, et al. (1995) Invest Ophthalmol Vis Sci 36: 1115-1124], allowing normal hexagonal cell morphology and allowing cytoskeleton distribution in the cell surface of actin.
- the scale bar is 100 ⁇ m.
- BMP-7 maintained the intracellular localization of Na + / K + -ATPase and ZO-1 in the cell membrane (plasma membrane).
- the scale bar is 100 ⁇ m.
- BMP-7 can maintain CEC in a polygonal contact-inhibiting phenotype with positive expression of function-related markers at a concentration of 1000 ng / ml. It was. In addition, control is no addition. Both Na + / K + -ATPase positive cells and ZO-1 positive cells were significantly increased in proportion compared to controls when treated with BMP-7. * P ⁇ 0.01, ** P ⁇ 0.05.
- BMP-7 was used to suppress the fibroblast-like change and maintain the endothelial cell function.
- BMP-7 bone morphogenetic protein 7
- Fibroblast-like HCEC was treated with BMP-7 at a concentration range of 10 ng / ml to 1000 ng / ml.
- the elongated cell shape of the fibroblast-like phenotype was converted to a polygonal cell morphology in response to the presence of BMP-7 in a concentration-dependent manner (A in FIG. 10A).
- BMP-7 allowed hexagonal cell morphology and maintained the cytoskeleton distribution of actin on the cell surface (B in FIG. 10A). This is the same condition as observed in normal CEC (Barry PA, Petrol WM, Andrews PM, Cavanag HD, Jester JV.
- BMP-7 can maintain CEC in a polygonal form at a concentration of 1000 ng / ml and maintain the phenotype by contact inhibition with positive expression of a function-related marker (Fig. E and F of 10A). This tendency was also observed at 10 ng / ml, the tendency increased at 100 ng / ml, and was more prominent at 1000 ng / ml.
- Example 7 Confirmation of additional effect
- SB203580 which is also an inhibitor of p38 MAPK, in addition to SB431542 in TGF- ⁇ signaling. Details are shown below.
- Corneal endothelial cells were mechanically detached together with the basement membrane from the research cornea purchased from Seattle Eye Bank, peeled off from the basement membrane using collagenase, and then subjected to primary culture.
- the medium is Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN catalog number: 31985-070) + 8% FBS (BIOWEST, catalog number: S1820-500) +200 mg / ml CaCl 2 .2H 2 O (SIGMA catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA catalog number: C9819-5G) +20 ⁇ g / ml ascorbic acid (SIGMA catalog number: A4544-25G) +50 ⁇ g / ml gentamicin (INVITROGEN catalog number: 15710-064) +5 ng / ml EGF (INVITROGEN catalog number: PHG0311) conditioned for 3T3 feeder cells was used as bas
- SB431542 (1 ⁇ mol / l, TOCRIS, catalog number: 1614) added to the basic medium
- SB203580 (1 ⁇ mol / l, CALBIOCHEM, catalog number: 559389) added
- SB431542 (1 ⁇ mol / l)
- SB203580 1 ⁇ mol / l
- SB203580 1 ⁇ mol / l
- the collected human corneal endothelial cells were divided into two parts, one was cultured in a basic medium and used as a control, and the other was added to the basic medium and added with SB431542 (TOCRIS) to a final concentration of 1 ⁇ mol / l.
- SB203580 which is also an inhibitor of p38 MAPK in TGF- ⁇ signaling, has been demonstrated to enhance culture normalization by being used in addition to SB431542, and further activated by aging
- SB203580 an inhibitor of p38 MAPK, which is known to increase the corneal endothelial density, which is known to decrease with aging. From this, it is understood that the effect of SB203580 is enhanced by additionally exhibiting the effect of inhibiting aging (maintaining undifferentiation).
- TGF- ⁇ signal inhibition makes it possible to culture human corneal endothelial cells (HCEC) that retain their shape at high density even after repeated passages. It was found that normalization was further enhanced (indicating that HCEC with high density and shape retention can be obtained even after repeated passages).
- Non-Patent Document 7 describes that conventional corneal endothelial cell culture media cannot be proliferated while maintaining a normal state when subcultured.
- Non-Patent Documents 8 to 11 describe a medium containing FBS, EGF and NGF, a medium using b-FGF, a medium using collagenase, and a medium using a conditioned medium, respectively.
- none of the conventional media can proliferate corneal endothelial cells while maintaining normal function.
- Example 8 Establishment of preferred culture method
- Corneal endothelial cells were mechanically detached together with the basement membrane from the research cornea purchased from Seattle Eye Bank, peeled off from the basement membrane using collagenase, and then subjected to primary culture.
- the medium is Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN catalog number: 31985-070) + 8% FBS (BIOWEST, catalog number: S1820-500) +200 mg / ml CaCl 2 .2H 2 O (SIGMA catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA catalog number: C9819-5G) +20 ⁇ g / ml ascorbic acid (SIGMA catalog number: A4544-25G) +50 ⁇ g / ml gentamicin (INVITROGEN catalog number: 15710-064) +5 ng / ml EGF (INVITROGEN Catalog Number: PHG0311) SB4 using conditioned medium for 3T3 feeder cells
- Rho-kinase inhibitor Y-27632 (WAKO, catalog number: 253-00513) was always added during the culture at a final concentration of 10 ⁇ mol / l.
- FIG. 13 shows an example of the finally established human corneal endothelial cell culture.
- human corneal endothelial cells are used in any of the culture methods 1 to 3. Was confirmed to be amplified at a high density as cells exhibiting a polygonal normal form while maintaining its normal function, and an example of a standard culture method could be established.
- Example 9 Example of cultured human corneal endothelium transplantation
- the result of having transplanted the human corneal endothelial cell cultured by the culture method 3 among the culture methods established in Example 8 to the corneal endothelial dysfunction model (bullous keratopathy model) using the primate cynomolgus monkey is shown. It shows that transparent healing of the cornea can be obtained by transplanting human corneal endothelial cells cultured with a ROCK inhibitor having adhesion promoting action. This indicates that the human corneal endothelial cells cultured in the present invention express normal functions even in living bodies and can be applied to regenerative medicine.
- the corneal limbus of cynomolgus monkey is incised 1.5 mm, a surgical instrument made of silicon is inserted into the anterior chamber, and the corneal endothelial cells are mechanically scraped to produce a bullous keratopathy model. Subsequently, 2.0 ⁇ 10 5 human corneal endothelial cells cultured in vitro according to the method of the present invention were suspended in a basal medium, and Y-27632, a ROCK inhibitor having an adhesion promoting effect, was added at a final concentration of 100 ⁇ mol / l was added and injected into the anterior chamber.
- Example 10 Example with anti-TGF- ⁇ neutralizing antibody
- Example 10 Example with anti-TGF- ⁇ neutralizing antibody
- Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN catalog number: 31985-070) + 8% fetal bovine serum (FBS) (BIOWEST, catalog number: S1820) ⁇ 500) +200 mg / ml CaCl 2 .2H 2 O (SIGMA catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA catalog number: C9819-5G) +20 ⁇ g ascorbic acid (SIGMA catalog number: A4544-25G) +50 ⁇ g / Incubate with ml gentamicin (INVITROGEN catalog number: 15710-064) + 5 ng / ml EGF (INVITROGEN catalog number: PHG0311) Things and were compared it to those cultured in media supplemented with TGF-beta neutralizing antibodies (500ng / ml).
- FBS fetal bovine serum
- Example 11 Normalized culture of corneal endothelium in another method
- SGF3 inhibitor can be used as a method other than SB431542 used in the above-mentioned examples to inhibit TGF- ⁇ signal and suppress transformation of human corneal endothelium. The details are shown below.
- Smad3 inhibitor 6,7-dimethoxy-2-((2E) -3- (1-methyl-2-phenyl-1H-pyrrolo [2,3-b] pyridin-3-yl-prop- from Calbiochem) 2-Enoyl))-1,2,3,4-tetrahydroisoquinolone (catalog number: 564405) was used. Smad3 inhibitors are also available from Merck Millipore. Culture method: Human corneal endothelial cells were cultured by the same method as the method showing the results of FIG. 3 (see Comparative Example 3 and the like).
- Opti-MEM I Reduced-Serum Medium, Liquid (INVITROGEN catalog number: 31985-070) + 8% fetal bovine serum (FBS) (BIOWEST, catalog number: S1820) ⁇ 500) +200 mg / ml CaCl 2 .2H 2 O (SIGMA catalog number: C7902-500G) + 0.08% chondroitin sulfate (SIGMA catalog number: C9819-5G) +20 ⁇ g ascorbic acid (SIGMA catalog number: A4544-25G) +50 ⁇ g / Incubate with ml gentamicin (INVITROGEN catalog number: 15710-064) + 5 ng / ml EGF (INVITROGEN catalog number: PHG0311) And stuff, were compared those cultured in media supplemented with this Smad3 inhibitor (0.3 mM and 3 mM).
- Corneal endothelial dysfunction with visual impairment is a major indication for corneal transplant surgery [Darlington JK, et al. (2006) Ophthalmology 113: 2171-2175], [Price MO, et al. (2010) Clin Experiment Ophthalmol 38: 128-140].
- corneal transplantation is widely used for corneal endothelial dysfunction, researchers are currently exploring alternative methods for restoring healthy corneal endothelium.
- the corneal endothelium is cultured from a young donor and stocked as “master cells” to allow transplantation of cells with high functional capacity.
- HLA-compatible transplantation [Khaireddin R, et al.
- endothelial mesenchymal transition The conversion from endothelial cells to fibroblast-like cells is called endothelial mesenchymal transition. Such conversion is triggered by TGF- ⁇ via the Smad2 / 3 pathway [Saika S (2006) Lab Invest 86: 106-115]. Endothelial mesenchymal transition causes loss of characteristic endothelial phenotypes, such as contact-inhibited monolayer loss and apical binding protein loss in the plasma membrane. Furthermore, this causes the induction of fibrous proteins such as type 1 collagen and fibronectin.
- the fibroblast-like phenotype of cultured CEC greatly loses endothelium-like characteristics; the expression of Na + / K + -ATPase and ZO-1 is significantly reduced
- its intracellular localization was in the cytosol, not the true cell membrane.
- the fibroblast-like phenotype significantly enhances the production of fibrotic ECM proteins (type 1 collagen, fibronectin and integrin ⁇ 5) rather than the basement membrane phenotype (type IV and type VIII collagen). The presence of such undesirable cells will greatly hinder the success of transplanting cultured cells in a clinical setting.
- SB431542 completely abolishes undesirable cell changes, and when either primate or human CEC cultures were treated with SB431542, the unavoidable changes in cells to a fibroblast-like phenotype were completely abolished. It was. At the same time, the characteristic intracellular location of ZO-1 and Na + / K + -ATPase returns to the plasma membrane, and the expression of these two proteins is greatly increased at both the mRNA and protein levels, It is suggested that the function of barriers and pumps in culture is intact. In addition, the inventors have also found that the production of fibrous ECM protein is greatly reduced. The inventors further describe BMP-7 [Zeisberg M, et al. (2003) Nat Med 9: 964-968], [Zeisberg M, et al.
- Example 12 Example with other inhibitors
- the experiment can be performed in accordance with the above-described example.
- A83-01 (available from TOCRIS or Miltenyi Biotec): A83-01 is a selective inhibitor of type I TGF-b receptor ALK5, Activin / Nodal receptor ALK4, Nodal receptor ALK7 It is.
- Stemolecule TM ALK5 inhibitor (available from Miltenyi Biotec): Selective ATP competitive of activin receptor-like kinase (ALK5), a type I TGF-b receptor It is an inhibitor.
- LDN-193189 (available from Miltenyi Biotec): inhibits BMP Type I receptors ALK2 and ALK3.
- Smad siRNA (synthesized by standard methods) A similar experiment is performed using these in place of SB431542 or BMP-7 used in the above-mentioned examples, and normalization of culture is confirmed.
- Example 12 Formulation example: culture medium for preparing corneal endothelial sheet
- a culture solution for preparing a corneal endothelial sheet containing the culture normalizing agent of the present invention is produced as follows.
- Example 13 Formulation example: corneal preservation solution containing culture normalizing agent
- a corneal preservation solution containing the culture normalizing agent of the present invention is produced as follows.
- Example 14 Production of cultured corneal endothelial cell sheet for transplantation
- rabbit corneal endothelial cells prepared by the technique established in Example 8 or an equivalent method are used.
- a Rho kinase inhibitor or a control substance as a cell adhesion promoter prepared by the same method as in Example 9 is used.
- Rho kinase inhibitor such as Y-27632 is added, and ZO-1 and Na + which are functional proteins of corneal endothelial cells are used in the same manner as in the above-described Examples. Fluorescent immune cell staining of / K + ATPase is performed to confirm expression.
- the corneal endothelium sheet is fixed with 95% ethanol ( ⁇ 30 ° C.) for 10 minutes. After washing with PBS, treat with 0.5% Triton X-100 / PBS for 5 minutes. Thereafter, 1% BSA / PBS is treated for 1 hour. Thereafter, anti-ZO-1 antibody or anti-Na + / K + ATPase antibody is treated overnight. After washing with PBS, Alexa-488 labeled secondary antibody is treated for 1 hour. After washing with PBS, a DAPI-containing mounting agent is dropped and sealed with a cover glass. Photographs are taken with a fluorescence microscope to confirm the expression of ZO-1 and Na + / K + ATPase.
- Example 15 Preparation of injection
- Example of Eye Drops The composition of the test substance at each concentration is shown below.
- Y-27632 WAKO, catalog number: 253-00513
- Rho kinase inhibitor 0.003 g, 0.01 g, 0.03 g, 0.05 g or 0.1 g (dose as dehydrochlorinated form)
- Sodium chloride 0.85g Sodium dihydrogen phosphate dihydrate 0.1g
- Benzalkonium chloride 0.005g
- Purified water appropriate amount Total amount 100 mg (pH 7.0).
- O Eye drops can be diluted with a base.
- composition of the substrate is as follows.
- a normalization culture method for corneal endothelial cells is provided, and a technique that can be used in industries (cell culture industry, pharmaceuticals, etc.) related to techniques related to corneal transplantation is provided.
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Abstract
Description
(1)線維化抑制剤を含む角膜内皮細胞の培養正常化剤。
(2)前記線維化抑制剤はトランスフォーミング増殖因子(TGF)βシグナル阻害剤を含む、項目1に記載の培養正常化剤。
(3)前記培養正常化は、ZO−1およびNa+/K+−ATPaseからなる群より選択される細胞機能が正常であることを含む、項目1または2に記載の培養正常化剤。
(4)前記培養正常化は角膜移植に適応する移植用細胞を製造するためのものである、項目1~3のいずれか1項に記載の培養正常化剤。
(5)前記移植用細胞は霊長類の細胞である、項目4に記載の培養正常化剤。
(6)前記移植用細胞はヒトの細胞である、項目4または5に記載の培養正常化剤。
(7)前記TGF−βシグナル阻害剤は、TGF−βのアンタゴニスト、TGF−βのレセプターのアンタゴニスト、またはSmad3の阻害剤である、項目2~6のいずれか1項に記載の培養正常化剤。
(8)前記TGF−βシグナル阻害剤は、SB431542(4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)]−1H−イミダゾール−2−イル]ベンズアミド)、BMP−7、抗TGF−β抗体、抗TGF−βレセプター抗体、TGF−βのsiRNA、TGF−βレセプターのsiRNA、TGF−βのアンチセンスオリゴヌクレオチド、6,7−ジメトキシ−2−((2E)−3−(1−メチル−2−フェニル−1H−ピロロ[2,3−b]ピリジン−3−イル−プロプ−2−エノイル))−1,2,3,4−テトラヒドロイソキノロン、A83−01(3−(6−メチル−2−ピリジニル)−N−フェニル−4−(4−キノリニル)−1H−ピラゾール−1−カルボチオアミド)、ステモレキュールTM TLK インヒビター(2−(3−(6−メチルピリジン−2−イル)−1H−ピラゾール−4−イル)−1,5−ナフチリジン)、ステモレキュールTM BMPインヒビターLDN−193189(6−(4−(ピペリジン−1−イル)エトキシ)フェニル)−3−(ピリジン−4−イル)ピラゾロ[1,5−a]ピリミジン)、SD−208(2−(5−クロロ−2−フルオロフェニル)−4−[(4−ピリジニル)アミノ]プテリジン)、LY364947(4−[3−(2−ピリジニル)−1H−ピラゾール−4−イル]−キノリン)、それらの薬学的に許容可能な塩もしくは溶媒和物、またはその薬学的に受容可能な塩の溶媒和物を少なくとも1種含む、項目2~7のいずれか1項に記載の培養正常化剤。
(8A)前記TGF−βシグナル阻害剤は、SB431542(4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)]−1H−イミダゾール−2−イル]ベンズアミド)、BMP−7、抗TGF−β抗体、抗TGF−βレセプター抗体、TGF−βのsiRNA、TGF−βレセプターのsiRNA、TGF−βのアンチセンスオリゴヌクレオチド、A83−01(3−(6−メチル−2−ピリジニル)−N−フェニル−4−(4−キノリニル)−1H−ピラゾール−1−カルボチオアミド)、ステモレキュールTM TLK インヒビター(2−(3−(6−メチルピリジン−2−イル)−1H−ピラゾール−4−イル)−1,5−ナフチリジン)、ステモレキュールTM BMPインヒビターLDN−193189(6−(4−(ピペリジン−1−イル)エトキシ)フェニル)−3−(ピリジン−4−イル)ピラゾロ[1,5−a]ピリミジン)、SD−208(2−(5−クロロ−2−フルオロフェニル)−4−[(4−ピリジニル)アミノ]プテリジン)、LY364947(4−[3−(2−ピリジニル)−1H−ピラゾール−4−イル]−キノリン)、それらの薬学的に許容可能な塩もしくは溶媒和物、またはその薬学的に受容可能な塩の溶媒和物を少なくとも1種含む、項目2~8のいずれか1項に記載の培養正常化剤。
(9)前記TGF−βシグナル阻害剤は、SB431542(4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)−1H−イミダゾール−2−イル]ベンズアミド)またはその薬学的に許容可能な塩を含む、項目2~8または8Aのいずれか1項に記載の培養正常化剤。
(9A)前記SB431542は、使用時に約0.1μM~約10μMの濃度で存在するように含まれる、項目8、8Aまたは9に記載の培養正常化剤。
(9B)前記TGF−βシグナル阻害剤は、BMP−7を含む、項目2~8または8Aのいずれか1項に記載の培養正常化剤。
(9C)前記BMP−7は、使用時に約10ng/ml~約1000ng/mlの濃度で存在するように含まれる、項目8、8Aまたは9Bに記載の培養正常化剤。
(9D)前記BMP−7は、使用時に約100ng/ml~約1000ng/mlの濃度で存在するように含まれる、項目8、8Aまたは9Bに記載の培養正常化剤。
(9E)前記BMP−7は、使用時に約1000ng/mlの濃度で存在するように含まれる、項目8、8Aまたは9Bに記載の培養正常化剤。
(10)前記線維化抑制剤はさらにMAPキナーゼ阻害剤を含む、項目1~8、8A、9、9A、9B、9C、9Dまたは9Eのいずれか1項に記載の培養正常化剤。
(11)前記MAPキナーゼ阻害剤はSB203580(4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジン)またはその薬学的に許容可能な塩を含む、項目10に記載の培養正常化剤。
(12)老化抑制剤をさらに含む、項目1~8、8A、9、9A、9B、9C、9D、9E、10または11のいずれか1項に記載の培養正常化剤。
(13)前記老化抑制剤は、p38 MAPキナーゼ阻害剤を含む、項目12に記載の培養正常化剤。
(14)前記老化抑制剤はSB203580(4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジン)を含む、項目13に記載の培養正常化剤。
(15)SB431542(4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)−1H−イミダゾール−2−イル]ベンズアミド)と、SB203580(4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジン)またはその薬学的に許容可能な塩とを含む、項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~14のいずれか1項に記載の培養正常化剤。
(16)細胞接着促進剤をさらに含む、項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~15のいずれか1項に記載の培養正常化剤。
(17)前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミドまたはその薬学的に許容可能な塩(たとえば、Y−27632(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミド2塩酸1水和物)を含む、項目16に記載の培養正常化剤。
(18)前記線維化抑制剤は、前記角膜内皮細胞の培養の間常に存在させ、他方、前記接着促進剤は、一定期間存在させた後、いったん該接着促進剤を欠損させ、再度該細胞接着促進剤は、一定期間存在させることを特徴とする、項目16または17に記載の培養正常化剤。
(19)前記線維化抑制剤および前記細胞接着促進剤の両方を、前記角膜内皮細胞の培養の間常に存在させることを特徴とする、項目16または17に記載の培養正常化剤。
(20)前記移植用細胞は、角膜内皮障害の予防または治療のためのものである、項目4~8、8A、9、9A、9B、9C、9D、9E、10または11~19のいずれか1項に記載の培養正常化剤。
(21)項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤と角膜内皮の培養成分とを含む、角膜内皮細胞を正常に培養するための培地。
(22)項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤、または項目21に記載の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法。
(23)項目22に記載の方法で培養される角膜内皮細胞。
(24)項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤を含む、角膜内皮細胞の保存液。
(25)項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤、または項目21に記載の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞を含む、角膜内皮疾患、障害または状態の処置または予防のための医薬。
(26)前記処置または予防は、霊長類の角膜内皮のためのものである、項目25に記載の医薬。
(27)前記処置または予防は、ヒトの角膜内皮のためのものである、項目25または26に記載の医薬。
(28)前記角膜内皮細胞は霊長類由来である、項目25~27のいずれか1項に記載の医薬。
(29)前記角膜内皮細胞はヒト由来である、項目25~28のいずれか1項に記載の医薬。
(30)前記角膜内皮疾患、障害または状態が水疱性角膜症または角膜内皮炎である、項目25~29のいずれか1項に記載の医薬。
(31)前記医薬は、シート状または懸濁物である、項目25~30のいずれか1項に記載の医薬。
(32)細胞接着促進剤をさらに含む、項目24~31のいずれか1項に記載の医薬。
(32A)前記細胞接着促進剤はRhoキナーゼ阻害剤を含む、項目32に記載の医薬。
(33)前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミドまたはその薬学的に許容可能な塩(たとえば、Y−27632(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミド2塩酸1水和物))である、項目32または32Aに記載の医薬。
(34)項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤、または項目21に記載の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞を用いる工程を包含する、角膜内皮疾患、障害または状態の処置または予防のための方法。
(34A)さらに、項目26~32、32Aおよび33のいずれか1項に記載の特徴を少なくとも1つ有する、項目34に記載の方法。
(35)細胞接着促進剤を含む、ヒトの角膜内皮疾患、障害または状態の処置または予防のための医薬。
(35A)前記細胞接着促進剤はRhoキナーゼ阻害剤を含む、項目35に記載の医薬。
(36)前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミドまたはその薬学的に許容可能な塩(たとえば、Y−27632(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミド2塩酸1水和物))である、項目35または35Aに記載の医薬。
(37)前記医薬は、項目1~8、8A、9、9A、9B、9C、9D、9E、10または11~20のいずれかに記載の培養正常化剤、または項目21に記載の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞と共に用いられる、項目35、35Aまたは36に記載の医薬。
(38)前記角膜内皮疾患、障害または状態が水疱性角膜症または角膜内皮炎である、項目35、35A、および36~37のいずれか1項に記載の医薬。
(39)細胞接着促進剤を処置または予防が必要な被験体に投与する工程を包含する、ヒトの角膜内皮疾患、障害または状態の処置または予防のための方法。
(39A)項目35A、および36~38のいずれか1項に記載の特徴を少なくとも1つ有する、項目39に記載の方法。
本明細書において「線維化抑制剤」とは、線維化を抑制する任意の薬剤を言う。本発明で使用される線維化抑制剤は、トランスフォーミング増殖因子(TGF)−βシグナル阻害剤、***促進因子(マイトージェン)活性化タンパク質キナーゼ(MAPK)38抑制剤、インターロイキン(IL)−12、IL−10、インターフェロン(IFN)−γ、またはBMP−7(OP−1)などの、抗線維化作用を有することが知られているサイトカイン等を挙げることができる。このようなサイトカイン類等の情報は、公的データベース、例えばGenBank、雑誌刊行物などから入手することができる。理論に束縛されることを望まないが、本発明では、線維化を抑制することによって、従来は、正常な機能を有する細胞の増殖が困難であった角膜内皮細胞の顕著な増加を達成することができた。したがって、本発明に用いられる線維化抑制剤は、正常な機能を有する細胞の増殖をもたらすものである限り、どのような薬剤でも用いられることが理解される。
本明細書において用いられる分子生物学的手法、生化学的手法、微生物学的手法は、当該分野において周知であり慣用されるものであり、例えば、Sambrook J.et al.(1989).Molecular Cloning:A Laboratory Manual,Cold Spring Harborおよびその3rd Ed.(2001);Ausubel,F.M.(1987).Current Protocols in Molecular Biology,Greene Pub.Associates and Wiley−Interscience;Ausubel,F.M.(1989).Short Protocols in Molecular Biology:A Compendium of Methods from Current Protocols in Molecular Biology,Greene Pub.Associates and Wiley−Interscience;Innis,M.A.(1990).PCR Protocols:A Guide to Methods and Applications,Academic Press;Ausubel,F.M.(1992).Short Protocols in Molecular Biology:A Compendium of Methods from Current Protocols in Molecular Biology,Greene Pub.Associates;Ausubel,F.M.(1995).Short Protocols in Molecular Biology:A Compendium of Methods from Current Protocols in Molecular Biology,Greene Pub.Associates;Innis,M.A.et al.(1995).PCR Strategies,Academic Press;Ausubel,F.M.(1999).Short Protocols in Molecular Biology:A Compendium of Methods from Current Protocols in Molecular Biology,Wiley,and annual updates;Sninsky,J.J.et al.(1999).PCR Applications:Protocols for Functional Genomics,Academic Press、Gait,M.J.(1985).Oligonucleotide Synthesis:A Practical Approach,IRLPress;Gait,M.J.(1990).Oligonucleotide Synthesis:A Practical Approach,IRL Press;Eckstein,F.(1991).Oligonucleotides and Analogues:A Practical Approach,IRL Press;Adams,R.L.etal.(1992).The Biochemistry of the Nucleic Acids,Chapman&Hall;Shabarova,Z.et al.(1994).Advanced Organic Chemistry of Nucleic Acids,Weinheim;Blackburn,G.M.et al.(1996).Nucleic Acids in Chemistry and Biology,Oxford University Press;Hermanson,G.T.(I996).Bioconjugate Techniques,Academic Press、別冊実験医学「遺伝子導入&発現解析実験法」羊土社、1997などに記載されている。角膜内皮細胞については、Nancy Joyceらの報告{Joyce,2004 #161}{Joyce,2003 #7}がよく知られているが、前述のごとく長期培養、継代培養により線維芽細胞様の形質転換を生じ、効率的な培養法の研究が現在も行われている。これらは本明細書において関連する部分(全部であり得る)が参考として援用される。
以下に好ましい実施形態の説明を記載するが、この実施形態は本発明の例示であり、本発明の範囲はそのような好ましい実施形態に限定されないことが理解されるべきである。当業者はまた、以下のような好ましい実施例を参考にして、本発明の範囲内にある改変、変更などを容易に行うことができることが理解されるべきである。
1つの局面において、本発明は、線維化抑制剤を含む角膜内皮細胞の培養正常化剤を提供する。本発明が提供される前、角膜内皮細胞は、移植に適した形態を維持しつつ増殖させることは困難であった。特に、継代を重ねると移植が困難になるものであった。移植が困難になる指標としては、機能タンパク質の消失がある。従来、通常の培養法では形態変化が生じることが知られていたが、本発明ではこれが形態的に線維芽細胞様であることから線維性変化であると考え、それがTGF−βシグナルの活性化を伴うものであることを発見した。ここで、TGF−βシグナルの活性化は、限定を意図しないが、実施例で例示されるように、フィブロネクチンおよびコラーゲン1型、4型、8型フィブロネクチン、インテグリンα5、およびインテグリンβ1などの細胞外マトリクスまたはインテグリン等の量、レベル等を調べることによって、判定することができる。限定を意図するものではないが、フィブロネクチンのタンパク質発現レベルは、正常の表現型よりも線維芽細胞の表現型において強くアップレギュレートされる。従来、生体において先天性梅毒などの極めて稀な疾患において角膜内皮細胞の線維化が伴うことは見いだされていたが、線維化を抑制する治療法の開発はない。したがってこのような疾患や培養条件下において線維化を薬物により抑制することで正常な機能を維持することができるかどうか予想できなかった。本発明者らは、他の細胞でTGF−βシグナル阻害剤を代表例として線維化を抑えることが知られている薬剤を使用したところ、形態変化を抑制した培養が可能になり予想外に正常機能を維持しつつ継代を行なうことができ(すなわち、培養正常化が可能)、角膜内皮細胞の大幅な増殖を可能にすることを見出した。正常な機能を維持しながら角膜内皮細胞を大量培養することは従来不可能であった。したがって、本発明によって達成された効果は、まさに顕著であるというべきである。
別の局面において、本発明は、本発明の培養正常化剤と角膜内皮の培養成分とを含む、角膜内皮細胞を正常に培養するための培地を提供する。本発明の培地において用いられる培養正常化剤は、本明細書において説明される任意の形態を用いることができることが理解される。また、本発明において使用されうる培養成分は、角膜内皮の培養に用いられうる成分であればどのようなものでも用いることができ、従来販売され使用されている培地成分であってもよく、あるいは、別途角膜内皮用に開発された成分であってもよい。そのような培地成分の例としては、OptiMEM、DMEM,M199、MEM等(これらは、INVITROGEN等から入手可能)を挙げることができるがこれらに限定されない。
別の局面において、本発明は、本発明の培養正常化剤、または本発明の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法を提供する。本発明の方法において用いられる培養正常化剤は、本明細書において説明される任意の形態を用いることができることが理解される。また、本発明の方法において使用されうる培養成分は、角膜内皮の培養に用いられうる成分であればどのようなものでも用いることができ、(角膜内皮細胞を正常に培養するための培地)において説明されたものを例示することができる。
本発明は、本発明の方法で培養される角膜内皮細胞を提供する。本発明は、通常の培養を行い継代しても、線維化せず、正常機能を喪失しないという細胞である点従来の細胞に無い性質を有するということができる。そして、最も重要な性質は、機能としては正常な角膜内皮の性質を有しているという点である。したがって、本発明が提供する角膜内皮細胞は、製剤として提供されうることから、本発明は、角膜内皮製剤を提供するということになる。
(1)細胞層が単層構造である。これは生体の角膜内皮細胞層が備える特徴の一つである。
(2)細胞層における細胞密度は約1,000~約4,000細胞/mm2である。特に、成人をレシピエント(移植者)とする場合には約2,000~約3,000細胞/mm2であることが好ましい。
(3)細胞層を構成する細胞の平面視形状が略六角形である。これは生体における角膜内皮細胞層を構成する細胞が備える特徴の一つである。本発明の製剤は生体の角膜内皮細胞層に類似し、生来の角膜内皮細胞層と同様の機能を発揮するとともに、生体内で増殖能も発揮することができる。
(4)細胞層において細胞が規則正しく整列している。生体の角膜内皮細胞層においてはそれを構成する細胞は規則正しく整列しており、これによって角膜内皮細胞の正常な機能と高い透明性が維持され、また角膜の水分調整機能が適切に発揮されると考えられている。したがって、このような形態的な特徴を備えることにより、本発明の製剤は、生体における角膜内皮細胞層と同様の機能を発揮することが期待される。
角膜内皮細胞はレシピエント自身または適切なドナーの角膜から常法で採取される。本発明における移植条件を考慮すれば、同種由来の角膜内皮細胞を準備すればよい。例えば、角膜組織のデスメ膜と内皮細胞層を角膜実質から剥離した後、培養皿に移し、ディスパーゼなどで処理する。これによって角膜内皮細胞はデスメ膜より脱落する。デスメ膜に残存している角膜内皮細胞はピペッティングなどによって脱落させることができる。デスメ膜を除去した後、本発明の培養液中で角膜内皮細胞を培養する。培地または培養液としては例えば市販のDMEM(Dulbecco’s Modified Eagle’s Medium)(例えば、INVITROGEN、カタログ番号:12320等を)にFBS(ウシ胎仔血清)(例えば、BIOWEST、カタログ番号:S1820−500)、b−FGF(塩基性線維芽細胞増殖因子)(例えば、INVITROGEN、カタログ番号:13256−029)、およびペニシリン、ストレプトマイシンなどの抗生物質を適宜添加し、さらに本発明の培養正常化剤の成分を添加したものを使用することができる。培養容器(培養皿)にはその表面にI型コラーゲン、IV型コラーゲン、フィブロネクチン、ラミニンまたはウシ角膜内皮細胞の細胞外マトリックスなどをコーティングしてあるものを使用することが好ましい。あるいは、通常の培養容器をFNC coating mix(登録商標)(50ml(AES−0407)、ATHENA、カタログ番号:0407)等の市販のコーティング剤で処理したものを用いてもよい。かかるコーティングと本発明の培養液とを併用することにより、角膜内皮細胞の培養容器表面への接着が促され、良好な増殖が行われるからである。
培養に供された角膜内皮細胞が増殖した後に継代培養を行うことができる。好ましくはサブコンフルエントないしコンフルエントになった時点で継代培養を行う。継代培養は次のように行うことができる。まずトリプシン−EDTA等で処理することによって細胞を培養容器表面から剥がし、次いで細胞を回収する。回収した細胞に本発明の培養正常化剤または培地を加えて細胞浮遊液とする。細胞を回収する際、あるいは回収後に遠心処理を行うことが好ましい。かかる遠心分離処理によって細胞密度の高い細胞浮遊液を調製することができる。好ましい細胞密度は、約1~2×106個/mLである。尚、ここでの遠心処理の条件としては、例えば、500rpm(30g)~1000rpm(70g)、1~10分を挙げることができる。
細胞浮遊液は、コラーゲンシート等の基材上に播種され、培養に供される。この際、最終的に製造される角膜内皮製剤において所望の細胞密度の細胞層が形成されるように播種する細胞数が調整される。具体的には細胞密度が約1,000~約4,000細胞/mm2の細胞層が形成されるように細胞を播種する。培養は上記の初期培養などと同様の条件で行うことができる。培養時間は使用する細胞の状態などによっても異なるが、例えば3~30日間である。
本発明は、本発明の培養正常化剤、または本発明の培地を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞を含む、角膜内皮疾患、障害または状態の処置または予防のための医薬を提供する。本発明の培地または培養正常化剤は本明細書において説明される任意の形態を用いることができることが理解され、例えば、(培養正常化剤)、(角膜内皮細胞を正常に培養するための培地)、(角膜内皮細胞を正常に培養する方法)に記載された事項を参酌することができる。また、医薬として使用される角膜内皮細胞は、本明細書において使用される任意の形態をとり得ることが理解され、例えば、(角膜内皮細胞および角膜内皮製剤)に記載された事項を参酌することができる。
それぞれ、日精バイリス株式会社滋賀研究所および株式会社イブバイオサイエンスで飼われた4匹のカニクイザル(3~5歳齢;ヒト年齢では5~20歳に等しいと推定される)からの8個の角膜を、サル角膜内皮細胞(MCEC)培養に使用した。12個のヒトドナー角膜は、SightLifeTMアイバンクから入手し、全ての角膜を、初代培養前に14日未満の期間にわたり、保存培地(Optisol;Chiron Vision Corporation,Irvine,CA)中、4℃で保存した。
2サンプルの比較の平均値における統計的有意差(P値)は、スチューデントのt検定を用いて決定した。複数のサンプルセットの比較における統計的有意差は、ダネットの多重比較検定を用いて解析した。グラフに示す値は平均±SEを表す。
本例では、従来法で培養したカニクイザルおよびヒトの角膜内皮細胞の様子を示す。以下にその詳細を示す。
・カニクイザル角膜内皮細胞(MCEC;入手先および培養方法):MCECは、以前に記載された改良型プロトコールで培養した[Koizumi N,et al.(2007)Invest Ophthalmol Vis Sci 48:4519−4526]、[Li W,et al.(2007)Invest Ophthalmol Vis Sci 48:614−620]。簡単に述べると、別の目的で安楽死させたカニクイザルの眼球を購入して、(Nissei Bilis Co.,Ltd.,Ohtsu,JapanおよびKeari Co.,Ltd.,Wakayama,Japan)(方法は上述)、角膜内皮細胞を含むデスメ膜を剥離し、角膜内皮細胞を基底膜とともに機械的に剥離して、ディスパーゼあるいはコラゲナーゼ(ROCHE カタログ番号:10 103 586 001)を用いて処理後に初代培養を行った。代表的には、1mg/mLコラゲナーゼA(Roche Applied Science,Penzberg,Germany)を用いて37℃にて2時間処理した。培地は10%FBS(BIOWEST、カタログ番号:S1820−500)と2ng/ml 塩基性FGF(INVITROGEN、カタログ番号:13256−029)を添加したDMEM(INVITROGEN カタログ番号12320)を用いた。培養には、FNC Coating MIX(登録商標)(Athena Environmental Sciences.,Baltimore,MD)でコーティングした6ウェルプレート等を用いた。次いで、MCECを5%CO2中37℃の加湿雰囲気下で培養し、2日おきに培養培地を交換した。MCECが10~14日でコンフルエントに達すると、これらを、Ca2+およびMg2+非含有ダルベッコリン酸緩衝化生理食塩水(PBS)中でリンスし、37℃にて5分間0.05%トリプシン−EDTA(Life Technologies)でトリプシン処理し、そして、1:2~4の比で継代した。トランスフォーミング増殖因子−β(TGF−β)の選択的インヒビターであるSB431542(Merck Millipore,Billerica,MA)を、抗線維芽細胞様作用について調べた。
・ヒト角膜内皮細胞(HCEC、入手先および培養方法):HCECは、MCECについて用いたプロトコールの改良バージョンで培養した。簡単に述べると、シアトルアイバンクから購入した研究用角膜より、角膜内皮細胞を含むデスメ膜を剥離し、角膜内皮細胞を基底膜とともに機械的に剥離して、コラゲナーゼ(ROCHE カタログ番号:10 103 586 001)を用いて基底膜よりはがして(代表的には、1mg/mLコラゲナーゼA(Roche Applied Science)を用いて37℃にて2時間処理した。)回収後、初代培養を行った。培地はヒトはOpti−MEM I Reduced−Serum Medium,Liquid(INVITROGEN カタログ番号:31985−070)+8%ウシ胎仔血清(FBS)(BIOWEST、カタログ番号:S1820−500)+200mg/ml CaCl2・2H2O(SIGMA カタログ番号:C7902−500G)+0.08% コンドロイチン硫酸(SIGMA カタログ番号:C9819−5G)+20μg/ml アスコルビン酸(SIGMA カタログ番号:A4544−25G)+50μg/ml ゲンタマイシン(INVITROGEN カタログ番号:15710−064)+5ng/ml EGF(INVITROGEN カタログ番号:PHG0311)を3T3フィーダー細胞用に馴化させたものを用いた。具体的には、37℃での消化後、個々の角膜から得られたHCECを培養培地中に再懸濁させ、FNC Coating Mix(登録商標)でコーティングした12ウェルプレートの1ウェルにプレーティングした。培養培地は、一部の改変を加えた公開されたプロトコールに従って調製した。簡単に述べると、OptiMEM−I(Life Technologies)、8% FBS、5ng/mL 上皮増殖因子(EGF)(Sigma−Aldrich Co.,St.Louis,MO)、20μg/mL アスコルビン酸(Sigma−Aldrich)、200mg/L 塩化カルシウム(Sigma−Aldrich)、0.08% コンドロイチン硫酸(和光純薬工業株式会社、大阪市)および50μg/mLのゲンタマイシンを含有する基本培養培地を準備し、次いで、不活性化3T3線維芽細胞の培養後に馴化培地を回収した。3T3線維芽細胞の不活性化は、以前に記載されたとおりに実施した。簡単に述べると、コンフルエントな3T3線維芽細胞を4μg/mL マイトマイシンC(MMC)(協和発酵キリン株式会社、東京都)とともに、5%CO2下で37℃にて2時間インキュベートし、次いでトリプシン処理し、そして、2×104細胞/cm2の密度でプラスチック皿にプレーティングした。HCECは、5%CO2中37℃にて加湿雰囲気下で培養し、2日おきに培養培地を交換した。HCECが14~28日でコンフルエントに達すると、これらを、Ca2+およびMg2+非含有PBS中でリンスし、37℃にて5分間0.05%トリプシン−EDTAでトリプシン処理し、そして、1:2の比で継代した。SB431542(Merck Millipore)、TGF−βに対する中和抗体(R&D Systems,Inc.,Minneapolis,MN)、Smad3インヒビター(Merck Millipore)および骨形成タンパク質(BMP)BMP−7(R&D Systems)を、抗線維芽細胞様作用について調べた。
・染色等の細胞観察方法(組織学的試験):細胞観察は位相差顕微鏡にて行った。また、細胞を固定した後に機能関連マーカーとしてZO−1、Na+/K+−ATPaseを用いて免疫染色を行い蛍光顕微鏡にて観察を行った。組織染色検査のために、培養したMCECまたはHCECをLab−TekTM Chamber SlidesTM(NUNC A/S,Roskilde,Denmark)に入れ、4%ホルムアルデヒドで10分間室温(RT)で固定し、1%ウシ血清アルブミン(BSA)とともに30分間インキュベートした。具体的には、Lab−TekTMChamber SlidesTM(NUNC A/S,Roskilde,Denmark)上の培養MCECまたはHCECを室温で10分間4%ホルムアルデヒド中で固定し、1%ウシ血清アルブミン(BSA)とともに30分間インキュベートした。CECの表現型を調べるために、密着結合関連タンパク質であるZO−1(Zymed Laboratories,Inc.,South San Francisco,CA)、ポンプ機能に関連するタンパク質であるNa+/K+−ATPase(Upstate Biotec,Inc.,Lake Placid,NY)、フィブロネクチン(BD,Franklin Lakes,NJ)およびアクチンの免疫組織化学分析を行った。CECの機能に関連するマーカーとしてZO−1およびNa+/K+−ATPaseを使用し、線維芽細胞様の変化を評価するためにフィブロネクチンおよび1型コラーゲンを使用し、そして、細胞の形態を評価するためにアクチンの染色を使用した。ZO−1、Na+/K+−ATPase、1型コラーゲンおよびフィブロネクチンの染色は、それぞれ、ZO−1ポリクローナル抗体、Na+/K+−ATPaseモノクローナル抗体、およびフィブロネクチンモノクローナル抗体の1:200希釈を用いて実施した。二次抗体には、Alexa Fluor(登録商標)488標識、または、Alexa Fluor(登録商標)594標識ヤギ抗マウスIgG(Life Technologies)の1:2000希釈を使用した。アクチンの染色は、Alexa Fluor(登録商標)488標識ファロイジン(Life Technologies)の1:400希釈を用いて実施した。次いで、細胞の核をDAPI(Vector Laboratories,Inc.,Burlingame,CA)またはPI(Sigma−Aldrich)で染色した。次いで、スライドを蛍光顕微鏡(TCS SP2 AOBS;Leica Microsystems,Welzlar,Germany)で観察した。
図1にカニクイザルおよびヒトにおける従来の細胞培養法での培養結果を示す。培養結果から明らかなように、サル、ヒトの角膜内皮において通常の培養法では形質転換し、すなわち、いずれの細胞でも線維化が生じており、多角形の一層の細胞である正常細胞とは異なった形態であり移植には適さない状態となっていることが分かる。
本例では、従来技術で培養した場合に、正常機能を消失することを示す実験を行った。本例では、サル角膜内皮が機能関連タンパク質の発現を消失するかどうかを、免疫染色およびウェスタンブロット法ならびにリアルタイムPCR法にて実証した。以下にその詳細を示す。
以下に使用した材料のうち比較例1と同じものは比較例1と同様に入手し培養等を行った。
・カニクイザル角膜内皮細胞:比較例1と同じである。
・ヒト角膜内皮細胞:比較例1と同じである。
・Na+/K+−ATPaseに対する抗体:MILLIPORE社製(MILLIPORE カタログ番号:05−369)のものを用いた。
・ZO−1に対する抗体:マウスINVITROGEN社製(INVITROGEN カタログ番号:339100)、ウサギZYMED LABORATORIES社製(ZYMED LABORATORIES カタログ番号:61−7300)のものを用いた。・フィブロネクチンに対する抗体::BDBIOSCIENCES社製(カタログ番号:610077)
・コラーゲン1型に対する抗体:(ABCAM社製)(カタログ番号:ab292)
・GAPDHに対する抗体:ABCAM社製(カタログ番号:ab36840)のものを用いた。
・二次抗体(HPR結合抗ウサギIgG二次抗体)Cell Signaling Technology社製(カタログ番号:7074)
・二次抗体(抗ウサギIgG二次抗体)Cell Signaling Technology社製(カタログ番号:7076)
・細胞画分抽出・調製法:コンフルエントに達した細胞をPBS(Dulbecco’s PBS、ニッスイ、カタログ番号:5913)で3回洗浄後、RIPAバッファー(1×PBS、1% Nonidet P−40(ナカライテスク、カタログ番号:23640−94)、0.5%デオキシコール酸ナトリウム(ナカライテスク、カタログ番号:10712−12)、0.1%SDS(ラウリル硫酸ナトリウム、ナカライテスク、カタログ番号:31607−65))で溶解した。前述のRIPAバッファー中には、ホスファターゼインヒビターカクテル2(Sigma−Aldrich)およびプロテアーゼインヒビターカクテル(ナカライテスク株式会社、京都市)を添加した。得られた細胞溶解液を遠心分離(15000rpm、10分間)し、その上清を回収し、タンパク質をBCA PROTEIN ASSAY KIT(PIERCE社製(カタログ番号:23227))により定量した。5mM 2−メルカプトエタノール(ナカライテスク社製(カタログ番号:21418−42))を含む100μlの溶解バッファー(レムリサンプルバッファー)で溶解した。
・免疫染色:コンフルエントに達した細胞をPBS(ニッスイ、カタログ番号:5913)洗浄後、氷冷したエタノール(ナカライテスク、カタログ番号:14713−95)と酢酸(WAKO カタログ番号:017−00256)(95:5)にて10分間固定した。
・ウェスタンブロット法:RIPAバッファーで抽出し得られたタンパク質を7.5%ポリアクリルアミドで電気泳動した。分離されたタンパク質はPVDF膜(PALL LIFE SCIENCE社製(カタログ番号:EH−2222))に転写した。5%無脂肪乾燥乳(5%NON FAT DRY MILK、CELL SIGNALING社 カタログ番号:9999)を補った0.1%(vol/vol)ポリエチレンソルビタンモノラウレート(ナカライテスク、カタログ番号:28353−85)を含むTris緩衝化食塩水(10mMTris−HCl、pH7.4;100mM NaCl)(TBS−T)と、ブロットした膜を1時間インキュベートすることによりブロッキング操作を行った。この後、ZO−1抗体とNa+/K+−ATPase抗体を5%無脂肪乾燥乳を補ったTBS−Tにて1000倍に希釈したものをメンブレンに浸し、室温で1時間反応させた。TBSーTで3回洗浄後、マウス−IgG抗体HRP複合体(CELL SIGNALING社(カタログ番号:7074P2))とインキュベートし、洗浄後、ECL−ADVAVCE Western Blotting Detection Kit(GE ヘルスケア・ジャパン社(カタログ番号:RPN2135V))で発光させたバンドを検出した。フィブロネクチンに対する抗体、コラーゲン1型に対する抗体についても、同様に使用した。次いで、以下の一次抗体:Na+/K+−ATPase(Merck Millipore)、ZO−1、GAPDH(Abcam,Cambridge,UK)、フィブロネクチンおよびSmad2(Cell Signaling Technology)、リン酸化Smad2(Cell Signaling Technology)、ERK1/2(BD)、リン酸化ERK1/2(BD)、p38MAPK(BD)、リン酸化p38MAPK(BD)、JNK(BD)またはリン酸化JNK(BD)(1:1000希釈)、および、HRP標識抗ウサギまたは抗ウサギIgG二次抗体(Cell Signaling Technology)(1:5000希釈)とともにインキュベーションを行った。メンブレンを、ECL Advance Western Blotting Detection Kit(GE Healthcare,Piscataway,NJ)によって感光させ、次いで、LAS4000S画像化システム(富士フィルム株式会社、東京都)を用いて調べた。
・リアルタイムPCR(半定量的逆転写酵素ポリメラーゼ連鎖反応(RT−PCR)):また、以下の方法にてNa+/K+−ATPase、ZO−1、GAPDHに対するPCR法を行った。プライマーは、オリゴヌクレオチド合成会社であるINVITROGENから購入し、脱塩処理したものを用いた。自然に線維様形態に変化した角膜内皮細胞および正常角膜内皮細胞を試料とし、Na+/K+−ATPase、ZO−1のmRNA量を半定量的PCR法により調べた。細胞からの総RNAの抽出にはRNEasy(QIAGEN社、カタログ番号:74106)を用いた。抽出したRNAはReverTra Ace(TOYOBO社(カタログ番号:TRT−101))により逆転写反応(42℃、60分間)を行い、TAKARA Taq HotStart Version(タカラバイオ社、カタログ番号:RR001A)によりGAPDHを内部標準としてNa+/K+−ATPase、ZO−1を増幅した。同量のcDNAを、PCR機(GeneAmp 9700;Applied Biosystems)と、下記のプライマーペアによって増幅した。PCR反応には下記に示すプライマーを用いた。フィブロネクチンに対する抗体、コラーゲン1型、4型、インテグリンα5、インテグリンベータ1に対するPCR反応についても、同様に下記プライマーを使用した。
増幅されたDNA断片は1.5%アガロースゲル(ナカライテスク、カタログ番号:01149−76)で電気泳動し、エチジウムブロマイド(ナカライテスク、カタログ番号:14603−51)での染色により検出した。
・定量PCRは、以下のTaqMan(登録商標)(Invitrogen)プライマーを用いて実施した。コラーゲン1型:Hs00164004_m1;フィブロネクチン:Hs01549976_m1;GAPDH:Hs00266705_g1。PCRは、StepOneTM(Applied Biosystems)リアルタイムPCRシステムを用いて行った。GAPDHは内部標準として用いた。
図2で示されるように、従来技術で培養した場合に、線維芽細胞様に形態変化したサル角膜内皮細胞においては正常機能を消失することが示された。正常の形態に培養できたサル角膜内皮細胞と比較すると、線維芽細胞様(fibroblastic)に形態変化することで、サル角膜内皮が機能関連マーカーの発現を消失することを免疫染色、ウェスタンブロット法およびリアルタイムPCR法にて示された。
さらに、線維芽霊長類CECは、細胞外マトリックス等の状況がどうなっているかを調べた。その結果を図2Aに示す。
本比較例では、従来の培養法では角膜内皮細胞の線維化が生じることを確認した(図3)。3T3フィーダー細胞由来の馴化培地は線維芽変化(fibroblastic change)を抑制する。しかし3T3フィーダー細胞由来の馴化培地のみでは継代培養を行うとやはり形質転換にいたることを示す(図3右)。
使用した材料のうち比較例1および2と同じものは比較例1および2と同様に入手し培養等を行った。
・コントロール:コントロールのヒト角膜内皮細胞の培養に用いた培地はOpti−MEM I Reduced−Serum Medium,Liquid(INVITROGEN カタログ番号:31985−070)+8%FBS(BIOWEST、カタログ番号:S1820−500)+200mg/ml CaCl2・2H2O(SIGMA カタログ番号:C7902−500G)+0.08% コンドロイチン硫酸(SIGMA カタログ番号:C9819−5G)+20μg/ml アスコルビン酸(SIGMA カタログ番号:A4544−25G)+50μg/ml ゲンタマイシン(INVITROGEN カタログ番号:15710−064)+5ng/ml EGF(INVITROGEN カタログ番号:PHG0311)である。
・3T3フィーダー細胞用の馴化培地:NIH3T3細胞を0.1%ゼラチンコート(SIGMA社、カタログ番号:G1890−500G)した150mm ディッシュ(FALCON、カタログ番号:3025)に10%FBS(BIOWEST、カタログ番号:S1820−500)/DMEM(INVITROGEN、カタログ番号:12320)で播種し、サブコンフルエントまで培養しておく。続いて終濃度0.04mg/mL マイトマイシンC溶液(協和発酵キリン、カタログ番号 874231)にて37℃、5%CO2インキュベーター内で2時間インキュベートする。10%FBS(BIOWEST、カタログ番号:S1820−500)/DMEM培地に置換して一晩培養する。このように作成したNIH3T3細胞にOpti−MEM I Reduced−Serum Medium,Liquid(INVITROGEN、カタログ番号:31985−070)+8%FBS(BIOWEST、カタログ番号:S1820−500)+200mg/ml CaCl2・2H2O(SIGMA、カタログ番号:C7902−500G)+0.08% コンドロイチン硫酸(SIGMA、カタログ番号:C9819−5G)+20μg/mlアスコルビン酸(SIGMA、カタログ番号:A4544−25G)+50μg/ml ゲンタマイシン(INVITROGEN、カタログ番号:15710−064)+ 5ng/ml EGF(INVITROGEN、カタログ番号:PHG0311)を加えて1晩培養してヒト角膜内皮培養用馴化培地とする。
・培養方法:比較例1と同様の方法で、それぞれの培地を用いて培養した。
・染色等の細胞観察方法:位相差顕微鏡にて細胞の形態を観察した。
図3に示すように、従来法の別法として3T3フィーダー細胞を用いた馴化培地での培養でも、線維化が生じ移植には適しない状態になってしまったことが示された。
本実施例では、形質転換が線維芽細胞様の形態であることに着目して、一般的な細胞種で知られている線維化誘導の際に活性化される経路の活性化についてウエスタンブロット法にて検討した。
使用した材料のうち比較例1~3と同じものは比較例1~3と同様に入手し培養等を行った。
・カニクイザル角膜内皮細胞:別の目的で安楽死させたカニクイザルの眼球を購入して、(Nissei Bilis Co.,Ltd.,Ohtsu,Japanおよび Keari Co.,Ltd.,Wakayama,Japan)角膜内皮細胞を基底膜とともに機械的に剥離し、ディスパーゼあるいはコラゲナーゼを用いて基底膜よりはがして回収後、初代培養を行った。培地は10%FBS(BIOWEST、カタログ番号:S1820−500)と2ng/ml 塩基性FGF(INVITROGEN、カタログ番号:13256−029)を添加したDMEM(INVITROGEN、カタログ番号:12320)を用いた。この際、サル角膜内皮細胞は図1に示したように正常の形態に培養されることもあるが、同様の培養法、長期培養、継代培養により線維芽細胞様に形態変化することが多い。そこで、正常の形態に培養できた細胞と線維芽細胞様に形態変化した細胞を回収してウエスタンブロット法に用いた。
・pSmad2に対する抗体:CELL SIGNALING社から入手したもの(カタログ番号:3108P)を用いた。
・pSmadに対する抗体:CELL SIGNALING社から入手したもの(カタログ番号:5339P)を用いた。
・pp38に対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(p38a/SAPK2aと同じ。カタログ番号:612168)を用いた。
・p38に対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(カタログ番号:612280)を用いた。
・pERK1/2に対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(カタログ番号:612358)を用いた。
・ERK1/2に対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(カタログ番号:610030)を用いた。
・pJNKに対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(カタログ番号:610627)を用いた。
・JNKに対する抗体:BD TRANSDUCTIONL LABORATORIES社から入手したもの(カタログ番号:612540)を用いた。
・細胞画分抽出・調製法:コンフルエントに達した細胞をPBSで3回洗浄後、RIPAバッファー(1×PBS(ニッスイ、カタログ番号:5913)、1% Nonidet
P−40(ナカライテスク、カタログ番号:23640−94)、0.5%デオキシコール酸ナトリウム(ナカライテスク、カタログ番号:10712−12)、0.1% SDS(ナカライテスク、カタログ番号:31607−65))で溶解した。得られた細胞溶解液を遠心分離(15000rpm、10分間)し、その上清を回収し、タンパク質をBCA PROTEIN ASSAY KIT(PIERCE社製、カタログ番号:23227)により定量した。5mM2−メルカプトエタノール(ナカライテスク社製、カタログ番号:21418−42)を含む100μlの溶解バッファー(レムリサンプルバッファー)で溶解した。
・ウェスタンブロット法:RIPAバッファーで抽出し得られたタンパク質を7.5%ポリアクリルアミドで電気泳動した。分離されたタンパク質はPVDF膜(PALL LIFE SCIENCE社製、カタログ番号:EH−2222)に転写した。0.1%(vol/vol)ポリエチレンソルビタンモノラウレート(ナカライテスク、カタログ番号:28353−85)(TBS−T)と5%無脂肪乾燥乳(CELL SIGNALING社、カタログ番号:9999)を補ったTris緩衝化食塩水(10mMTris−HCl、pH7.4;100mMNaCl)と、ブロットした膜を1時間インキュベートすることによりブロッキング操作を行った。この後、Smad2抗体、pSmad2抗体、p38抗体、pp38抗体、ERK抗体、pERK抗体、JNK抗体、およびpJNK抗体を5%NON FAT DRY MILK(CELL SIGNALING社、カタログ番号:9999)を補ったTBS−Tにて1000倍に希釈したものをメンブレンに浸し、室温で1時間反応させた。T−TBSで3回洗浄後、マウス−IgG抗体HRP複合体(CELL SIGNALING社、カタログ番号:7074P2)とウサギ−IgG抗体HRP複合体(GE Healthcare、カタログ番号:NA934)インキュベートし、洗浄後、ECL−ADVAVCE(GE ヘルスケア・ジャパン社、カタログ番号:RPN2135V)で発光させたバンドを検出した。
図4に、線維化の形質転換の原因となりうる主たる経路の活性をサル角膜内皮を用いてウェスタンブロットで検討した結果を示す。線維芽細胞においてSmad2のリン酸化(TGF−β経路の活性化)、p38 MAPKの活性化、JNK経路の活性化が認められた。一方で、ERK1/2のリン酸化は抑制されていた。Smad2、p38、ERK1/2およびJNKは報告によればすべてEMT経路に関与している[Chen KH,et al.(1999)Invest Ophthalmol Vis Sci 40:2513−2519]、[Kim TY,et al.(2001)Invest Ophthalmol Vis Sci 42:3142−3149]、[Naumann GO,et al.(2000)Ophthalmology 107:1111−1124]、[Parsons CJ,et al.(2007)J Gastroenterol Hepatol 22 Suppl 1:S79−84]、[Ma FY,et al.(2009)Front Biosci(Schol Ed)1:171−187]ので、本発明者らは、Smad2およびMAPKが、上皮細胞において観察されるEMTと同様の内皮間葉転換に関与するかどうかを検討した。Smad2のリン酸化は、正常表現型のものと比較した場合に、線維芽細胞様表現型において大いに促進されることが分かった(図4)。p38およびERK1/2のリン酸化は、線維芽細胞様表現型において大いに増強されたが、JNKの活性化は無視しうるものであった。ただし、ERKのリン酸化は細胞の線維化による変化のみではなく、細胞増殖による影響があるために、細胞の増殖の状態によっては異なる結果となることがありうることを確認している。これらの知見は、TGF−βシグナル伝達が、CECの線維芽細胞様転換にとって重要な役割を発揮し得ることを示す。
本例では、TGF−βシグナルをレセプターのリン酸化阻害剤により阻害することでサル角膜内皮の形質転換を抑制することができた例を示す。
使用した材料のうち比較例1~3および実施例1と同じものは比較例1~3および実施例1と同様に入手し培養等を行った。
・カニクイザル角膜内皮細胞:別の目的で安楽死させたカニクイザルの眼球を購入して、(Nissei Bilis Co.,Ltd.,Ohtsu,Japanおよび Keari Co.,Ltd.,Wakayama,Japan)角膜内皮細胞を基底膜とともに機械的に剥離し、コラゲナーゼを用いて基底膜よりはがして回収後、初代培養を行った。この際同一角膜を2分して、サル角膜内皮培養用基本培地(10%FBS(BIOWEST、カタログ番号:S1820−500)と2ng/ml 塩基性FGF(INVITROGEN、カタログ番号:13256−029)を添加したDMEM(INVITROGEN、カタログ番号:12320))および基本培地に1μmol/lSB431542(TOCRIS社、カタログ番号:1614)を添加したものを用いた。
図5に示すように、位相差像は、SB431542の存在下で培養した霊長類CECが真の多角形細胞形状と接触阻害型の単層を示す一方で、コントロールのCECは、線維芽細胞様の形態を示すことを実証した(図4A)。コントロールの基本培地で培養したものは線維芽細胞様に形質転換して重層化を認める一方で、TGF−βシグナルをレセプターのリン酸化阻害剤により阻害することで多角形の大小不動の小さい一層の生体同様の形態を示し、サル角膜内皮の形質転換を抑制することができた。
本実施例では、本発明により、培養の正常化の実証として、角膜内皮の機能関連タンパク質が維持されることを実証した。以下に詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。特に実施例2と同様のものを用いた。
・SB431542:TOCRIS社から得た(カタログ番号:1614)。
・Na+/K+−ATPaseに対する抗体:MILLIPORE社製のもの(カタログ番号:05−369)を用いた。
・ZO−1に対する抗体:マウスINVITROGEN社製(カタログ番号:339100)、ウサギZYMED LABORATORIES社製(カタログ番号:61−7300)のものを用いた。
・GAPDHに対する抗体:ABCAM社のもの(カタログ番号:ab36840)を用いた。
・免疫染色等:実施例2と同様に培養した細胞を固定してNa+/K+−ATPaseおよびZO−1に対して免疫染色を行い、蛍光顕微鏡にて撮影した。
・ウエスタンブロット法:実施例1と同様にNa+/K+−ATPase、ZO−1、GAPDHに対するウエスタンブロット法を行った。
・リアルタイムPCR法:また、以下の方法にてNa+/K+−ATPase、ZO−1、GAPDHに対するPCR法を行った。プライマーは、オリゴヌクレオチド合成会社であるINVITROGENから購入し、脱塩処理したものを用いた。自然に線維様形態に変化した角膜内皮細胞および正常角膜内皮細胞を試料とし、Na+/K+−ATPase、ZO−1のmRNA量を半定量的PCR法により調べた。細胞からの総RNAの抽出にはRNEasy(QIAGEN社、カタログ番号:74106)を用いた。抽出したRNAはRever Tra Ace(TOYOBO社、カタログ番号:TRT−101)により逆転写反応(42℃、60分間)を行い、TAKARA Taq HotStart Version(タカラバイオ社、カタログ番号:RR001A)によりGAPDHを内部標準としてNa+/K+−ATPase、ZO−1を増幅した。PCR反応には下記に示すプライマーを用いた。
増幅されたDNA断片は1.5%アガロースゲルで電気泳動し、エチジウムブロマイド染色により検出した。
図6に示すように、培養により線維芽細胞様に形質転換したサル角膜内皮細胞においては機能関連マーカーであるNa+/K+−ATPase、ZO−1の発現が免疫染色、ウェスタンブロット、PCRにて示された。一方で、TGF−βシグナルをレセプターのリン酸化阻害剤により阻害することでサル角膜内皮の機能関連タンパク質が維持されることが示された。すなわち、SB431542処理したCECがNa+/K+−ATPaseおよびZO−1の特徴的な原形質膜染色を示した一方で、コントロールのCECはその染色を失っており、SB431542処理した細胞では内皮機能が維持されることが示唆された(図6左)。また、Na+/K+−ATPaseおよびZO−1の発現は、タンパク質(図6右上)およびmRNAレベル(図6右下)の両方で、SB431542処理した線維芽細胞様表現型において強力に亢進された。これらのデータは、TGF−βが霊長類CEC培養において観察された内皮間葉転換の直接媒介因子であり得ることをさらに確認した。
本実施例では、TGF−βシグナルがサル角膜内皮の形質転換に関与することを確認するために、TGF−βを添加して形質転換を誘導し機能関連タンパクが喪失することを示した(免疫染色)。また、ウェスタンブロットにより、TGF−βを添加して形質転換を誘導し機能関連タンパクが喪失することを示した。以下に詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・TGF−β:R&D SYSTEMS社のもの(カタログ番号:240−B)を用いた。
・Na+/K+−ATPaseに対する抗体:MILLIPORE社製のもの(カタログ番号:05−369)を用いた。
・ZO−1に対する抗体:マウスINVITROGEN社製(カタログ番号:339100)、ウサギZYMED LABORATORIES社製(カタログ番号:61−7300)のものを用いた。
・GAPDHに対する抗体:ABCAM社のもの(カタログ番号:ab36840)を用いた。
・pSmad2に対する抗体:CELL SIGNALING社のもの(カタログ番号:3108P)を用いた。
・pSmadに対する抗体:CELL SIGNALING社のもの(カタログ番号:5339P)を用いた。
・培養方法:サル角膜内皮細胞をサブコンフルエントまで培養し、培地中に終濃度0、1、10ng/mLとなるようにTGF−β1を添加し、37℃で形態に変化が現れるまで培養した。
・染色方法:上記実施例のとおりである。
・細胞画分抽出法:上記実施例のとおりである。
・ウェスタンブロット法:上記実施例のとおりである。
図7に示すように、TGF−βシグナルがサル角膜内皮の形質転換に関与することを確認するために免疫染色を行ったところ、TGF−βを添加して形質転換を誘導し機能関連タンパクが喪失することが示された。すなわち、図7に示すように、正常表現型が、外来性TGF−βに曝露された際に、線維芽細胞様の細胞へと転換することが示された。正常表現型の原形質膜におけるNa+/K+−ATPaseおよびZO−1の染色パターンは、TGF−βに暴露されることにより完全に消失した(図7中列、右列)。
本実施例では、ヒト角膜内皮においても、TGF−βシグナルをレセプターのリン酸化阻害剤により阻害することで形質転換を抑制し、正常な内皮を培養することを確認した。以下に詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・酵素結合免疫吸着測定法(ELISA):HCECの培養上清中の1型コラーゲンを、ELISA kits for Collagen Type I Alpha 2(COL1a2)(Uscn Life Science Inc.,Wuhan,China)を製造元の説明書に従って使用して測定した。SB431542と共に、または、SB431542なしで培養したHCEC由来の培養上清を各群(n=5)について使用した。
(結果)
図9に示すように、SB431542を含まない基本培地で培養すると線維芽細胞様に形質転換して、重層化するのに対して、SB431542を培地に添加したものでは多角形の大小不動の少ない一層の細胞が培養される。このことより、サルのみならずヒト角膜内皮においても、TGF−βシグナルをレセプターのリン酸化阻害剤により阻害することで形質転換を抑制し、正常な内皮を培養することが確認された。すなわち、霊長類CECにおいて観察された興味深い知見から、HCECが、内皮間葉転換に至る同様の望ましくない細胞の不可避の変化に供されたかどうかをさらに検討した。最も興味深いことに、培養HCECは、特徴的な接触阻害型の単層構造と、多角形表現型を失い、そして、霊長類CECのような線維芽細胞様の細胞形態を獲得した(図9)。
次に、本発明者らは、SB431542が内皮細胞の機能を維持することができるかどうか試験した。ここでは、SB431542が、HCECの機能を維持し、HCECの線維芽細胞様の変化を抑制することを種々の実験を用いて実証した。結果を図9Aに示す。
本実施例では、上述の実施例で用いたSB431542以外の方法としてBMP−7を用いてもTGF−βシグナルを拮抗させヒト角膜内皮の形質転換を抑制することができることを実証した。以下にその詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・BMP−7:R&D SYSTEMS社のもの(カタログ番号:354−BP)を用いた。
・ファロイジン:Alexa Fluor(登録商標)488(INVITROGEN、カタログ番号:A12379)を用いた。
・培養方法:図3と同様の方法でヒト角膜内皮細胞を馴化培地にて培養した。続いてトリプシンにて継代培養を行ったが、同様の馴化培地にBMP−7(100ng/ml)を添加した培地で培養したものと、コントロールとして同様の馴化培地にて培養したものを比較した。
・位相差顕微鏡およびファロイジンによる細胞骨格の染色による形態観察において、コントールでは線維芽細胞様に形質転換して重層化する一方で、BMP−7添加培地では一層の多角形細胞の形態を維持できた。
図10に示すように、SB431542以外の方法としてBMP−7を用いてもTGF−βシグナルを拮抗させサル角膜内皮の形質転換を抑制することができた。BMP−7はSB431542とは他の詳細な伝達経路は異なるもののTGF−βシグナルに関連する因子としては共通することが知られている。すなわち、TGF−βシグナル伝達経路は、ALK4,5または7を経由するSmad2/3系と、ALK1,2,3または6を経由するSmad1/5/8系とに大きく分類され、いずれも線維化に関連していることがよく知られている。したがって、実質的にTGF−βシグナル全般を抑制することにより、角膜内皮の形質転換を抑制することができることが理解される。理論に束縛されることを望まないが、Smad2/3(ALK4、5および7に関連する)を介して効果を奏するSB431542、Smad1/5/8(ALK1、2、3および6に関連する)を介して効果を奏するBMP−7の両方で正常化が観察されていることから、これらのいずれの経路のTGF−βシグナル阻害剤であっても、本発明の効果を達成することができると理解される。TGF−βシグナル伝達経路は、ALK4/5/7を経由するSmad2/3系と、ALK1/2/3/6を経由するSmad1/5/8系とに大きく分類され、いずれも線維化に関連していることがよく知られている(J.Massagu’e,Annu.Rev.Biochem.1998.67:753−91;Vilar JMG,Jansen R,Sander C(2006)PLoS Comput Biol 2(1):e3;Leask,A.,Abraham,D.J.FASEB J.18,816−827(2004);Coert Margadant & Arnoud Sonnenberg EMBO reports(2010)11,97−105;Joel Rosenbloom et al.,Ann Intern Med.2010;152:159−166.)。したがって、2種類の代表的なTGF−βシグナル阻害剤のいずれによっても培養正常化が達成し得たことから、これらの結果から、Smad経路を問わず、どのようなTGF−βシグナル阻害剤であっても、培養正常化剤として機能しうることが理解される。
次に、3種類の濃度を用いて、BMP7がHCEC線維芽細胞様への変化を抑制し、その機能を維持することを示した。BMP−7はMETを促進し、TGF−β媒介性の上皮間葉転換を特異的に阻害する。したがって、この分子は、EMTプロセスをアンタゴナイズするために使用されている[ZeisbergM,et al.(2003)Nat Med 9:964−968]、[Simic P,et al.(2007)EMBO Rep 8:327−331]、[BuijsJT,et al.(2007)Am J Pathol 171:1047−1057]、[Zeisberg M,et al.(2007)J BiolChem 282:23337−23347]。それゆえ、本発明者らは、BMP−7がHCECの不可避の変化をアンタゴナイズできたかどうかを検討した。線維芽細胞様HCECを、10~1000ng/mlの範囲の濃度のBMP−7で処理した。
本実施例では、TGF−βシグナル伝達においてp38 MAPKの阻害剤でもあるSB203580を、SB431542に加えて用いることによって、培養正常化が強化されることを示す。以下に詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
図11に示すように、TGF−βシグナル伝達においてp38 MAPKの阻害剤でもあるSB203580を、SB431542に加えて用いることによって、培養正常化が強化されることが実証され、さらに老化により活性化することが知られているp38 MAPKの阻害剤であるSB203580を添加することで、老化することで低下することが知られている角膜内皮密度が上昇した。このことからSB203580の老化抑制(未分化維持)の効果も追加的に発揮されることにより、効果が増強されることが理解される。このように、p38 MAPK阻害に加えてTGF−βシグナル阻害によりヒト角膜内皮細胞が、継代を繰り返しても高密度で形態保持したヒト角膜内皮細胞(HCEC)の培養が可能になり、培養の正常化がより強化されることが分かった(継代を繰り返しても高密度で形態保持したHCECができることを示す)。
以上の実施例等の結果から、ヒト角膜内皮細胞の好ましい培養法の確立を試みた。以下にその詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
初代培養および継代培養時には接着促進作用をもつRhoキナーゼ阻害剤であるY−27632(WAKOあるいはTOCRIS)を最終濃度10μmol/lとして48時間添加した。
Rhoキナーゼ阻害剤であるY−27632(WAKO、カタログ番号:253−00513)を最終濃度10μmol/lとして培養中は常に添加した。
Y−27632を添加しないで基本培地としてSB431542(1μmol/l)およびSB203580(1μmol/l)を添加したもので培養した。
図13に示すのは最終的に確立されたヒト角膜内皮細胞培養の1例であり、この図および図12で示されるように、培養法1~培養法3のいずれにおいても、ヒト角膜内皮細胞をその正常な機能を維持しつつ多角形の一層の正常の形態を示す細胞として高密度で増幅させることが確認され、標準培養法の例を確立することができた。
実施例8で確立された培養法のうち培養法3により培養したヒト角膜内皮細胞を、霊長類であるカニクイザルを用いた角膜内皮不全モデル(水疱性角膜症モデル)に移植した結果を示す。接着促進作用を有するROCK阻害剤とともに培養したヒト角膜内皮細胞を移植することにより角膜の透明治癒が得られることを示す。これは本発明において培養したヒト角膜内皮細胞が生体においても正常な機能を発現して、再生医療に応用できることを示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・カニクイザル:滋賀医科大学動物生命科学研究センターにおいて倫理審査を得たのちに、可能な限り動物愛護的に以下の検討を行った。
本実施例では、抗TGF−β中和抗体でも同様に培養正常化が達成されるか確認した。薬剤を交換すること以外は、上記比較例および実施例に準じて実験をした。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・抗TGF−β中和抗体:R&D SYSTEMS社のもの(カタログ番号:MAB240)を用いた。
・培養方法:図3の結果を示した方法(比較例3等を参照)と同様の方法でヒト角膜内皮細胞を培養した。続いてトリプシンにて継代培養を行ったが、通常培地としてOpti−MEM I Reduced−Serum Medium,Liquid(INVITROGEN カタログ番号:31985−070)+8%ウシ胎仔血清(FBS)(BIOWEST、カタログ番号:S1820−500)+200mg/ml CaCl2・2H2O(SIGMA カタログ番号:C7902−500G)+0.08% コンドロイチン硫酸(SIGMA カタログ番号:C9819−5G)+20μg アスコルビン酸(SIGMA カタログ番号:A4544−25G)+50μg/ml ゲンタマイシン(INVITROGEN カタログ番号:15710−064)+5ng/ml EGF(INVITROGEN カタログ番号:PHG0311)で培養したものと、これにTGF−β中和抗体(500ng/ml)を添加した培地で培養したものを比較した。
・位相差顕微鏡による形態観察において、図16に示されるように、通常培地では形質転換して多角形細胞の形態を喪失し、大小不動の細胞が多く認められる一方で、TGF−β中和抗体添加培地では高密度の一層の多角形細胞の形態を維持できた。霊長類CECと一致して、CECを、TGF−β受容体に対する特異的インヒビター(SB431542)とともに培養した場合、このインヒビターは、細胞の形状が線維芽細胞様表現型に変化することをブロックすることができた。線維芽細胞様表現型に対するSB431542の阻害作用と同様に、TGF−βに対する中和抗体(図16B)もまた、細胞が線維芽細胞様表現型を獲得するのをブロックした。
本実施例では、上述の実施例で用いたSB431542以外の方法としてSmad3阻害剤を用いてTGF−βシグナルを阻害させヒト角膜内皮の形質転換を抑制することができることを実証した。以下にその詳細を示す。
使用した材料のうち上記比較例および実施例と同じものは上記比較例および実施例と同様に入手し培養等を行った。
・Smad3阻害剤:Calbiochem社の6,7−ジメトキシ−2−((2E)−3−(1−メチル−2−フェニル−1H−ピロロ[2,3−b]ピリジン−3−イル−プロプ−2−エノイル))−1,2,3,4−テトラヒドロイソキノロン(カタログ番号:566405)を用いた。Smad3阻害剤は、Merck Milliporeからも入手可能である。
・培養方法:図3の結果を示した方法(比較例3等を参照)と同様の方法でヒト角膜内皮細胞を培養した。続いてトリプシンにて継代培養を行ったが、通常培地としてOpti−MEM I Reduced−Serum Medium,Liquid(INVITROGEN カタログ番号:31985−070)+8%ウシ胎仔血清(FBS)(BIOWEST、カタログ番号:S1820−500)+200mg/ml CaCl2・2H2O(SIGMA カタログ番号:C7902−500G)+0.08% コンドロイチン硫酸(SIGMA カタログ番号:C9819−5G)+20μg アスコルビン酸(SIGMA カタログ番号:A4544−25G)+50μg/ml ゲンタマイシン(INVITROGEN カタログ番号:15710−064)+5ng/ml EGF(INVITROGEN カタログ番号:PHG0311)で培養したものと、これにSmad3阻害剤(0.3mMおよび3mM)を添加した培地で培養したものを比較した。
視覚障害をともなう角膜内皮機能不全は、角膜移植手術の主要な適応症である[Darlington JK,et al.(2006)Ophthalmology 113:2171−2175]、[Price MO,et al.(2010)Clin Experiment Ophthalmol 38:128−140]。角膜移植は角膜内皮機能不全について広く行われているが、研究者らは現在、健康な角膜内皮を回復させるための代替的な方法を探究している。角膜内皮が、若いドナーから培養され、「マスター細胞」としてストックすることにより、高い機能的能力を持つ細胞の移植が可能となる。加えて、拒絶のリスクを低下させるためのHLA適合移植[Khaireddin R,et al.(2003)Graefes Arch Clin Exp Ophthalmol 241:1020−1028]、[Coster DJ,et al.(2005)Am J Ophthalmol 140:1112−1122]が可能となる。組織生体工学は、視力を失った患者のための治療を開発するための新たなアプローチである[Engelmann K,et al.(2004)Exp Eye Res 78:573−578]。今日までに、生体工学的アプローチを利用する2つの方法が存在する:1)生体工学コンストラクト上に接着させた培養ドナーHCECの使用[Ishino Y,et al.(2004)Invest Ophthalmol Vis Sci 45:800−806]、[Mimura T,et al.(2004)Invest Ophthalmol Vis Sci 45:2992−2997]、[Koizumi N,et al.(2007)Invest Ophthalmol Vis Sci 48:4519−4526]、[Koizumi N,et al.(2012)Exp Eye Res 95:60−67]、そして、2)前眼房内への培養HCECの移植[Okumura N,et al.(2012)Am J Pathol 181:268−277]、[Mimura T,et al.(2003)Exp Eye Res 76:745−751]、[Mimura T,et al.(2005)Invest Ophthalmol Vis Sci 46:3128−3135]、[Patel SV,et al.(2009)Invest Ophthalmol Vis Sci 50:2123−2131]。臨床の状況に対してこれら2つの方法のいずれを応用するかに関わらず、HCECのための効率的な培養技術の確立は、必須かつ不可避である[Peh GS,et al.(2011)Transplantation 91:811−819]。多くの研究者が、HCECの不変で長期の培養を確立することが非常に難しいことを認めている[Engelmann K,et al.(2004)Exp Eye Res 78:573−578]。HCECの首尾よい培養がいくつかのグループによって報告されているが、単離およびその後の培養プロトコールにともなう手順は、研究室間で非常に多様である[Peh GS,et al.(2011)Transplantation 91:811−819]。最も困難な問題の1つは、HCECが、各継代ごとに甚だしい線維芽細胞様の変化を受けやすいことである[Engelmann K,et al.(2004)Exp Eye Res 78:573−578]。それゆえ、移植の目的での後の使用のために生理学的表現型を維持するためには、CECの自発的な転換を回避する手段を見出すことが必須である。
本実施例では、他のTGF−βシグナル阻害剤でも同様に培養正常化が達成されるか確認する。薬剤を交換すること以外は、上記実施例に準じて実験をすることができる。
・A83−01(TOCRIS社またはミルテニーバイオテク(Miltenyi Biotec)社から入手可能):A83−01はI型TGF−b受容体ALK5、Activin/Nodal受容体ALK4、Nodal受容体ALK7の選択的阻害物質である。
・StemoleculeTM ALK5インヒビター(ミルテニーバイオテク(Miltenyi Biotec)社から入手可能):I型TGF−b受容体であるアクチビン受容体様キナーゼ(activin receptor−like kinase)(ALK5)の選択的なATP競合的阻害物質である。
・LDN−193189(ミルテニーバイオテク(Miltenyi Biotec)社から入手可能):BMP Type I受容体ALK2およびALK3を阻害する。
・SmadのsiRNA(標準的な方法で合成する。)
これらを上記実施例で使用されたSB431542またはBMP−7に代えて用いて同様の実験を行い、培養正常化を確認する。
本実施例では、製剤例として、本発明の培養正常化剤を含有する角膜内皮シート調製用培養液を以下のようにして製造する。
SB431542 3.8439mg
SB203580 3.7743mg
FBS 10mL
ペニシリン−ストレプトマイシン溶液 1mL
FGF basic 200ng
DMEM 適量
全量 100mL
FBSは例えば、BIOWEST(カタログ番号:S1820−500)またはインビトロジェン製、ペニシリン−ストレプトマイシン溶液はナカライテスク製(ペニシリン 5000u/mL,ストレプトマイシン 5000μg/mL含有)、FGF basicは例えば、インビトロジェン製(INVITROGEN、カタログ番号:13256−029)、SB431542はTOCRIS社製、SB203580はCALBIOCHEM社製、DMEMはインビトロジェン製を用いることができる。
本実施例では、製剤例として、本発明の培養正常化剤を含有する角膜保存液を以下のように製造する。
SB431542 3.8439mg
SB203580 3.7743mg
Optisol−GS(Bausch−Lomb)適量
全量100mL
各成分は、実施例12と同様に入手することができる。
本実施例では、実施例8で確立した手法または同等の方法により調製したウサギ角膜内皮細胞を使用する。また、本実施例では、実施例9と同様の方法により調製した細胞接着促進剤としてのRhoキナーゼ阻害剤または対照物質を使用する。
点眼剤の調製例
各濃度の被験物質の組成を以下に示す。
塩化ナトリウム 0.85g
リン酸二水素ナトリウム二水和物 0.1g
ベンザルコニウム塩化物 0.005g
水酸化ナトリウム 適量
精製水 適量
全量100mg(pH7.0)。
リン酸二水素ナトリウム二水和物 0.1g
ベンザルコニウム塩化物 0.005g
水酸化ナトリウム 適量
精製水 適量
全量100mg(pH7.0)。
Claims (39)
- 線維化抑制剤を含む角膜内皮細胞の培養正常化剤。
- 前記線維化抑制剤はトランスフォーミング増殖因子(TGF)βシグナル阻害剤を含む、請求項1に記載の培養正常化剤。
- 前記培養正常化は、ZO−1およびNa+/K+−ATPaseからなる群より選択される細胞機能が正常であることを含む、請求項1に記載の培養正常化剤。
- 前記培養正常化は角膜移植に適応する移植用細胞を製造するためのものである、請求項1に記載の培養正常化剤。
- 前記移植用細胞は霊長類の細胞である、請求項4に記載の培養正常化剤。
- 前記移植用細胞はヒトの細胞である、請求項4に記載の培養正常化剤。
- 前記TGF−βシグナル阻害剤は、TGF−βのアンタゴニスト、TGF−βのレセプターのアンタゴニスト、またはSmad3の阻害剤である、請求項2に記載の培養正常化剤。
- 前記TGF−βシグナル阻害剤は、4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)]−1H−イミダゾール−2−イル]ベンズアミド、BMP−7、抗TGF−β抗体、抗TGF−β レセプター抗体、TGF−βのsiRNA、TGF−βレセプターのsiRNA、TGF−βのアンチセンスオリゴヌクレオチド、6,7−ジメトキシ−2−((2E)−3−(1−メチル−2−フェニル−1H−ピロロ[2,3−b]ピリジン−3−イル−プロプ−2−エノイル))−1,2,3,4−テトラヒドロイソキノロン、3−(6−メチル−2−ピリジニル)−N−フェニル−4−(4−キノリニル)−1H−ピラゾール−1−カルボチオアミド、2−(3−(6−メチルピリジン−2−イル)−1H−ピラゾール−4−イル)−1,5−ナフチリジン、6−(4−(ピペリジン−1−イル)エトキシ)フェニル)−3−(ピリジン−4−イル)ピラゾロ[1,5−a]ピリミジン、2−(5−クロロ−2−フルオロフェニル)−4−[(4−ピリジニル)アミノ]プテリジン、4−[3−(2−ピリジニル)−1H−ピラゾール−4−イル]−キノリン、それらの薬学的に許容可能な塩もしくは溶媒和物、またはその薬学的に受容可能な塩の溶媒和物を少なくとも1種含む、請求項2に記載の培養正常化剤。
- 前記TGF−βシグナル阻害剤は、4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)−1H−イミダゾール−2−イル]ベンズアミドまたはその薬学的に許容可能な塩を含む、請求項2に記載の培養正常化剤。
- 前記線維化抑制剤はさらにMAPキナーゼ阻害剤を含む、請求項1に記載の培養正常化剤。
- 前記MAPキナーゼ阻害剤は4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジンまたはその薬学的に許容可能な塩を含む、請求項10に記載の培養正常化剤。
- 老化抑制剤をさらに含む、請求項1に記載の培養正常化剤。
- 前記老化抑制剤は、p38 MAPキナーゼ阻害剤を含む、請求項12に記載の培養正常化剤。
- 前記老化抑制剤は4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジンまたはその薬学的に許容可能な塩を含む、請求項13に記載の培養正常化剤。
- 4−[4−(1,3−ベンゾジオキソール−5−イル)2−ピリジニル)−1H−イミダゾール−2−イル]ベンズアミドまたはその薬学的に許容可能な塩と、4−[4−(4−フルオロフェニル)−2−(4−メチルスルフィニルフェニル)−1H−イミダゾール−5−イル]ピリジン)またはその薬学的に許容可能な塩を含む、請求項1に記載の培養正常化剤。
- 細胞接着促進剤をさらに含む、請求項1のいずれか1項に記載の培養正常化剤。
- 前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミドまたはその薬学的に許容可能な塩を含む、請求項16に記載の培養正常化剤。
- 前記線維化抑制剤は、前記角膜内皮細胞の培養の間常に存在させ、他方、前記接着促進剤は、一定期間存在させた後、いったん該接着促進剤を欠損させ、再度該細胞接着促進剤は、一定期間存在させることを特徴とする、請求項16に記載の培養正常化剤。
- 前記線維化抑制剤および前記細胞接着促進剤の両方を、前記角膜内皮細胞の培養の間常に存在させることを特徴とする、請求項16に記載の培養正常化剤。
- 前記移植用細胞は、角膜内皮障害の予防または治療のためのものである、請求項4に記載の培養正常化剤。
- 請求項1に記載の培養正常化剤と角膜内皮の培養成分とを含む、角膜内皮細胞を正常に培養するための培地。
- 請求項1に記載の培養正常化剤を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法。
- 請求項22に記載の方法で培養される角膜内皮細胞。
- 請求項1に記載の培養正常化剤を含む、角膜内皮細胞の保存液。
- 請求項1に記載の培養正常化剤を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞を含む、角膜内皮疾患、障害または状態の処置または予防のための医薬。
- 前記処置または予防は、霊長類の角膜内皮のためのものである、請求項25に記載の医薬。
- 前記処置または予防は、ヒトの角膜内皮のためのものである、請求項25に記載の医薬。
- 前記角膜内皮細胞は霊長類由来である、請求項25に記載の医薬。
- 前記角膜内皮細胞はヒト由来である、請求項25に記載の医薬。
- 前記角膜内皮疾患、障害または状態が水疱性角膜症または角膜内皮炎である、請求項25に記載の医薬。
- 前記医薬は、シート状または懸濁物である、請求項25に記載の医薬。
- 細胞接着促進剤をさらに含む、請求項25に記載の医薬。
- 前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミドまたはその薬学的に許容可能な塩である、請求項32に記載の医薬。
- 請求項1に記載の培養正常化剤を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞を用いる工程を包含する、角膜内皮疾患、障害または状態の処置または予防のための方法。
- 細胞接着促進剤を含む、ヒトの角膜内皮疾患、障害または状態の処置または予防のための医薬。
- 前記細胞接着促進剤は(R)−(+)−トランス−(4−ピリジル)−4−(1−アミノエチル)−シクロヘキサンカルボキサミド2塩酸1水和物である、請求項35に記載の医薬。
- 前記医薬は、請求項1に記載の培養正常化剤を用いて角膜内皮細胞を培養する工程を包含する、角膜内皮細胞を正常に培養する方法によって生産された角膜内皮細胞と共に用いられる、細胞接着促進剤を含む、ヒトの角膜内皮疾患、障害または状態の処置または予防のための医薬。
- 前記角膜内皮疾患、障害または状態が水疱性角膜症または角膜内皮炎である、請求項35に記載の医薬。
- 細胞接着促進剤を処置または予防が必要な被験体に投与する工程を包含する、ヒトの角膜内皮疾患、障害または状態の処置または予防のための方法。
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2019
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2022
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