WO2021095776A1 - 細胞培養容器、細胞培養方法、および細胞培養容器の製造方法 - Google Patents
細胞培養容器、細胞培養方法、および細胞培養容器の製造方法 Download PDFInfo
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- WO2021095776A1 WO2021095776A1 PCT/JP2020/042106 JP2020042106W WO2021095776A1 WO 2021095776 A1 WO2021095776 A1 WO 2021095776A1 JP 2020042106 W JP2020042106 W JP 2020042106W WO 2021095776 A1 WO2021095776 A1 WO 2021095776A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/02—Form or structure of the vessel
- C12M23/12—Well or multiwell plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/46—Means for regulation, monitoring, measurement or control, e.g. flow regulation of cellular or enzymatic activity or functionality, e.g. cell viability
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0601—Invertebrate cells or tissues, e.g. insect cells; Culture media therefor
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
- B29C2045/0058—Shaping removing material
Definitions
- the present disclosure relates to a cell culture vessel, a cell culture method, and a method for producing a cell culture vessel.
- This application claims priority based on Japanese Application No. 2019-206248 filed on November 14, 2019, and incorporates all the contents described in the Japanese application.
- Patent Document 1 describes a cell culture container for culturing a cell mass or the like in a culture solution. This cell culture vessel has a plurality of wells in which a cell mass or the like to be cultured is held.
- the cell observation container is a first container configured to contain a culture solution and a state in which one or both of cells and cell clusters cultured by the culture solution are held.
- a second container having at least one well that can be taken in and out of one container is provided.
- Each at least one well has a bottom capable of holding the culture medium and a side wall extending from the periphery of the bottom. The side wall is provided with a liquid passing portion through which the culture liquid contained in the first container can pass.
- FIG. 1 is a cross-sectional view schematically showing a cell culture container according to an embodiment.
- FIG. 2 is a cross-sectional view schematically showing a cell culture container according to an embodiment.
- FIG. 3A is a plan view of the cell container shown in FIG.
- FIG. 3B is a cross-sectional view of the well of the cell container shown in FIG. 1 along the line IIIB-IIIB.
- FIG. 4A is a cross-sectional view showing a mold used in the method for producing a cell culture container according to an embodiment.
- FIG. 4B is a view of the upper mold and the core shown in FIG. 4A as viewed from below.
- FIG. 5A is a diagram showing one step of the method for producing a cell culture container according to an embodiment.
- FIG. 5B is a diagram showing a state after one step of the method for producing a cell culture vessel shown in FIG. 5A.
- the parts (a) to (d) of FIG. 6 are schematic cross-sectional views showing changes in the culture state of cells and cell clusters.
- FIG. 7 is a cross-sectional view schematically showing a culture step of the cell culture method according to the embodiment.
- FIG. 8 is a cross-sectional view schematically showing a culture step of the cell culture method according to the embodiment.
- FIG. 9 is a cross-sectional view schematically showing an observation step of the cell culture method according to the embodiment.
- FIG. 10 is a cross-sectional view schematically showing an observation step of the cell culture method according to the embodiment.
- FIG. 12A is a cross-sectional view schematically showing a cell culture vessel according to a modified example.
- FIG. 12B is a cross-sectional view schematically showing a cell culture vessel according to the modified example shown in FIG. 12A.
- FIG. 13A is a plan view schematically showing the cell container according to the modified example.
- FIG. 13B is a plan view schematically showing the cell container according to the modified example.
- FIG. 13C is a plan view schematically showing the cell container according to the modified example.
- FIG. 13D is a plan view schematically showing the cell container according to the modified example.
- FIG. 12A is a cross-sectional view schematically showing a cell culture vessel according to a modified example.
- FIG. 12B is a cross-sectional view schematically showing a cell culture vessel according to the modified example shown in FIG. 12A.
- FIG. 13A is a plan view schematically showing the cell container according to the modified example.
- FIG. 13B is a plan view schematically showing the
- FIG. 14A is a cross-sectional view schematically showing a well according to a modified example.
- FIG. 14B is a cross-sectional view schematically showing a well according to a modified example.
- FIG. 15A is a perspective view schematically showing a liquid passing portion according to a modified example.
- FIG. 15B is a perspective view schematically showing a liquid passing portion according to a modified example.
- FIG. 15C is a perspective view schematically showing a liquid passing portion according to a modified example.
- FIG. 16 is a cross-sectional view schematically showing a liquid passing portion according to a modified example.
- FIG. 17A is a cross-sectional view showing a mold used in the method for producing a cell culture container according to a modified example.
- FIG. 17A is a cross-sectional view showing a mold used in the method for producing a cell culture container according to a modified example.
- FIG. 17A is a cross-sectional view showing a mold used in the method for producing
- FIG. 17B is a cross-sectional view taken along the line XVIIB-XVIIB of the mold shown in FIG. 17A.
- FIG. 18 is a diagram showing a part of wells after molding by the method for producing a cell culture container according to a modified example.
- FIG. 19A is a diagram showing one step of a method for producing a cell culture container according to a modified example.
- FIG. 19B is a diagram showing a state after one step of the method for producing a cell culture vessel shown in FIG. 19A.
- FIG. 20A is a diagram showing one step of a method for manufacturing a cell culture container according to a modified example.
- FIG. 20B is a diagram showing a state after one step of the method for producing a cell culture container shown in FIG. 20A.
- FIG. 21 is a diagram schematically showing a well according to a further modification.
- FIG. 22 is a diagram schematically showing a well according to a further modification.
- FIG. 23 is a diagram schematically showing a well according to a further modification.
- FIG. 24 is a diagram schematically showing a well according to a further modification.
- FIG. 25 is a diagram schematically showing a well according to a further modification.
- FIG. 26 is a diagram schematically showing a well according to a further modification.
- FIG. 27 is a diagram schematically showing a well according to a further modification.
- FIG. 28 is a diagram schematically showing a well according to a further modification.
- FIG. 29 is a diagram schematically showing a cell culture vessel according to a further modified example.
- the cell culture container according to one embodiment is placed in the first container in a state of holding either or both of the first container configured to contain the culture solution and the cells and cell clusters cultured by the culture solution.
- a second container having at least one well that can be taken in and out of the cell is provided.
- Each at least one well has a bottom capable of holding the culture medium and a side wall extending from the periphery of the bottom. The side wall is provided with a liquid passing portion through which the culture liquid contained in the first container can pass.
- the culture solution is taken in and out of the well through the liquid passage portion provided on the side wall. Therefore, the wells can be filled with the culture solution only by inserting the wells into the first container containing the culture solution.
- the liquid passage portion may be at least one hole penetrating the side wall.
- the holes penetrating the side wall can realize a structure that allows the culture solution to pass through.
- the material constituting at least one well may be polystyrene. Since polystyrene has a property of being difficult to adhere to a cell mass or the like, it is suitable for culturing a cell mass or the like. By forming the well from polystyrene, for example, a cultured cell mass or the like can be easily removed from the well. Can be taken out.
- the liquid passage portion is at least a part of the side wall, and this region may be composed of a porous polymer material through which the culture liquid passes.
- the region of the side wall made of the porous polymer material can realize a structure that allows the culture solution to pass through.
- At least one well may be a plurality of wells connected to each other.
- the height from the lower end of each bottom of each of the plurality of wells to the lower end of each liquid passing portion may be constant.
- the amount of the culture solution remaining in the well is kept constant. Is difficult.
- the height is constant from the first container.
- the first container has a plurality of storage spaces into which a part of the plurality of wells can be taken in and out, and at least one partition wall separating the plurality of storage spaces from each other. You may be.
- the plurality of accommodation spaces are watertightly partitioned, the culture solution does not enter the wells accommodated in each accommodation space from other accommodation spaces. Therefore, contamination caused by the culture medium contained in another storage space can be avoided.
- the height from the lower end of the bottom to the lower end of the liquid passage portion may be 1.0 mm or more and 5.0 mm or less.
- each of at least one well may further have an inducing member that guides the flow of the culture solution discharged from the liquid passage portion.
- the discharged culture solution causes dripping to adhere to the lower part of the well, which hinders the observation of the cultured cell mass. there's a possibility that.
- the cell culture vessel is provided with an inducing member that prevents dripping, it becomes possible to efficiently observe the cell mass.
- the guiding member When the guiding member is provided, the guiding member is provided on the outer peripheral surface of each of at least one well in a region on the lower end side of the bottom portion of the liquid passing portion, and extends to the opposite side of the liquid passing portion. You may. In this case, the guiding member can be realized with a simple configuration.
- the cell culture method includes the step of preparing any of the above cell culture containers and immersing the cells held in at least one well in the culture solution contained in the first container to obtain cells and cells. It is provided with a step of culturing the cell mass obtained by agglomeration of cells and a step of observing the cell mass.
- the step of observing the cell mass involves removing the second container from the first container, and the cells in at least one well with a part of the culture solution discharged from at least one well through the liquid passage portion. You may observe the mass. In this case, a part of the culture solution can be easily discharged from the well in the observation step.
- the cell mass in the well is observed in a state where a part of the culture solution is discharged, it is possible to suppress the inhibition of the observation of the cell mass by the culture solution. Therefore, it is possible to efficiently observe the culture state of the cell mass in the process of culturing the cell mass.
- the step of observing the cell mass may include removing the liquid adhering to the outer periphery of the bottom of the second container after removing the second container from the first container. .. In this case, it is possible to prevent the observation of the cell mass from being hindered by the culture solution adhering to the outer periphery of the second container. Therefore, it is possible to more efficiently observe the culture state of the cell mass in the process of culturing the cell mass.
- the method for manufacturing a cell culture container is the above-mentioned method for manufacturing a cell culture container, and includes a step of manufacturing a second container by molding.
- an upper mold having a convex portion having a shape corresponding to the outer shape of at least one well and a shape corresponding to the outer shape of at least one well are arranged so as to face the convex portion.
- It has a step of forming a second container, and a hole as a liquid passage portion may be formed by a core.
- a hole as a liquid passage portion is formed in the well of the second container manufactured by molding, so that a cell culture container having the above structure can be easily formed. Therefore, by using the manufactured cell culture vessel, it is possible to efficiently observe the culture state of the cell mass in the process of culturing the cell mass.
- the method for manufacturing a cell culture container is the above-mentioned method for manufacturing a cell culture container, and includes a step of manufacturing a second container by molding.
- an upper mold having a convex portion having a shape corresponding to the outer shape of at least one well and a shape corresponding to the outer shape of at least one well are arranged so as to face the convex portion. It has a step of preparing a lower mold having a concave portion of the above, a step of preparing a mold including the mold, and a step of curing a resin material poured into the mold to form a second container containing at least one well.
- the upper mold may have protrusions extending in the vertical direction, protruding from the convex portion and in contact with the concave portion, and the protrusions may form a slit as a liquid passage portion.
- a slit as a liquid passage portion is formed in the well of the second container manufactured by molding, so that a cell culture container having the above structure can be easily formed. Therefore, by using the manufactured cell culture vessel, it is possible to efficiently observe the culture state of the cell mass in the process of culturing the cell mass.
- the method for producing a cell culture vessel is the above-mentioned method for producing a cell culture vessel, which comprises a step of molding a molded product having an outer shape of at least one well by molding, and laser irradiation. It may be provided with a step of forming a hole as a liquid passage portion in the molded product. According to this method, a hole as a liquid passage portion is formed in the produced well by laser irradiation, so that a cell culture container having the above structure can be easily formed. Therefore, by using the manufactured cell culture vessel, it is possible to efficiently observe the culture state of the cell mass in the process of culturing the cell mass.
- FIG. 1 and 2 are cross-sectional views schematically showing a cell culture vessel 1 according to an embodiment.
- the cell culture vessel 1 is used when culturing cells C and cell mass M (see FIG. 8) using the culture medium S.
- cell C is shown by a virtual line.
- the cell culture vessel 1 is a vessel for agglutinating cells C in the culture medium S to obtain a cell mass M in a desired state.
- the cell culture container 1 includes a culture solution container 2 (first container) and a cell container 3 (second container).
- the culture solution container 2 is a container (dish) for accommodating the culture solution S.
- the culture solution container 2 is made of, for example, resin.
- the resin material constituting the culture solution container 2 is preferably polystyrene, for example, but may be another resin, or may be glass or metal.
- the inner surface of the culture solution container 2 may be surface-treated by coating it with fluorine or the like, or may be subjected to a surface treatment having chemical resistance according to the properties of the culture solution S.
- the culture solution container 2 does not have to be a transparent material.
- the shape of the culture solution container 2 is substantially rectangular in a plan view.
- the culture solution container 2 has a rectangular flat bottom plate 21 and four side walls 22.
- the bottom plate 21 extends so as to spread along the horizontal plane in a state in which the culture solution S is contained (the state shown in FIG. 1).
- the thickness of the bottom plate 21 is, for example, 1 mm.
- the length of the bottom plate 21 in the longitudinal direction is, for example, 120 mm or more and 132 mm or less.
- the length of the bottom plate 21 in the lateral direction is, for example, 80 mm or more and 90 mm or less.
- the four side walls 22 are erected along the four edges of the bottom plate 21. Each side wall 22 extends upward from each edge of the bottom plate 21.
- the thickness of the side wall 22 is, for example, 1 mm.
- the height H1 of the side wall 22 is, for example, 14.5 mm.
- the bottom plate 21 and the four side walls 22 define a storage space V for storing the culture solution S.
- the culture solution container 2 has only one storage space V.
- the culture solution container 2 has an opening 23 that opens the storage space V on the opposite side to the bottom plate 21. With the bottom plate 21 placed along the horizontal plane, the opening 23 opens the accommodation space V upward.
- the cell container 3 is, for example, a resin well plate.
- the cell container 3 is made of a material that can transmit a light source for observation (for example, a light source L described later), and may be made transparent to visible light.
- the material constituting the cell container 3 is preferably polystyrene, for example, but may be polycarbonate or glass.
- the cell container 3 has a plate-shaped plate 31 and a plurality of (for example, 96 in this embodiment) wells 32 provided on the plate 31.
- the well 32 includes a bottom portion 32a and a side wall 32b, as will be described later.
- the bottom 32a of the well 32 may be made of a material that can transmit the light source for observation, and other parts (for example, the side wall 32b) may be made of a material that cannot transmit the light source. Good.
- the inner surface of the well 32 of the cell container 3 may be subjected to a surface treatment in which cells C are less likely to adhere or a chemical resistant surface treatment.
- the region (plate 31 or side wall 32b) other than the bottom 32a of the cell container 3 does not have to be a material different from the material of the bottom 32a, that is, a material that can transmit a light source, for example, an acrylic resin or a fluororesin (for example, PTFE). ) Or metal, or fibers such as non-woven fabric.
- a surface treatment that makes it difficult for cells to adhere to a region other than the inner surface of the bottom 32a of the well 32 may be performed, or a chemical-resistant surface treatment may be performed.
- the cell container 3 may be formed by appropriately combining the above-mentioned plurality of materials.
- FIG. 3A is a plan view of the cell container 3 shown in FIG.
- FIG. 3B is a cross-sectional view of the well 32 of the cell container 3 shown in FIG. 1 along the line IIIB-IIIB.
- the outer shape of the plate 31 is a substantially rectangular shape that is one size larger than the bottom plate 21.
- the thickness of the plate 31 is, for example, 1 mm.
- the plate 31 is arranged with a plurality of connection holes 31a (the same number as the wells 32, for example, 96 in the present embodiment) for connecting the wells 32 through the plate 31 in the thickness direction. ..
- the inner diameter ⁇ 1 of the connection hole 31a is, for example, 6.0 mm.
- the plate 31 connects a plurality of wells 32 to each other.
- the plate 31 has an outer shape larger than the opening 23 of the culture solution container 2, and when the cell container 3 is installed in the culture solution container 2, the plate 31 is the edge of the opening 23 of the culture solution container 2.
- Each well 32 is positioned in the culture solution container 2 by being in contact with the culture solution container 2.
- Well 32 is a container for holding cells C and cell mass M cultured in the culture medium S.
- the thickness of the well 32 is, for example, 1 mm.
- the plurality of wells 32 are configured so that they can be taken in and out of the storage space V of the culture solution container 2. In this embodiment, all wells 32 can be moved in and out of one accommodation space V.
- Each of the plurality of wells 32 is connected to the connection hole 31a.
- the plurality of wells 32 are arranged on one main surface 31b of the plate 31.
- the cell container 3 has wells 32 arranged in 12 rows in the longitudinal direction of the plate 31 and 8 rows of wells 32 in the lateral direction of the plate 31.
- the pitch P of the two adjacent wells 32 is constant (eg, 9.0 mm).
- the plurality of wells 32 are collectively arranged in the accommodating space V by moving the plate 31 close to the culture solution container 2, and collectively arranged from the accommodating space V by separating the plate 31 from the culture solution container 2. And leave.
- the well 32 has a bottom portion 32a and a side wall 32b that connects the bottom portion 32a and the plate 31.
- the bottom portion 32a has a concave shape that is recessed in a direction away from the plate 31, and can hold the culture solution S.
- the outer shape of the bottom portion 32a is, for example, hemispherical.
- the inner diameter ⁇ 2 of the bottom portion 32a is, for example, 5.2 mm.
- the side wall 32b is a tubular portion extending from the peripheral edge of the bottom 32a to the connection hole 31a of the plate 31.
- the bottom 32a and the side wall 32b define a culture space W for holding the cells C and the cell mass M to be cultured.
- the height H2 of the culture space W is smaller than the height H1 of the side wall 22.
- the height H2 is, for example, 10.5 mm.
- the end of the side wall 32b opposite to the bottom plate 21 communicates with the connection hole 31a of the plate 31, and the culture space W is
- the side wall 32b is provided with a liquid passing portion 4 through which the culture liquid S can pass.
- the liquid passage portion 4 is configured so as not to pass at least the cell mass M.
- the liquid passage portion 4 may be configured so as not to allow cells C to pass through.
- the liquid passage portion 4 is one or a plurality of holes 41.
- the number of holes 41 may be set arbitrarily. In this embodiment, an example in which a plurality of holes 41 are provided will be described.
- the hole 41 penetrates the side wall 32b along the thickness direction of the side wall 32b.
- the hole 41 may penetrate the side wall 32b along a direction inclined with respect to the thickness direction of the side wall 32b.
- the hole 41 communicates with the culture space W and the external space.
- the hole 41 allows the culture solution S to pass through.
- the shape of the hole 41 is circular when viewed from, for example, the penetrating direction (that is, the thickness direction of the side wall 32b).
- the size in the plane intersecting the penetrating direction of the hole 41 is a size that does not allow the cell mass M to pass through, for example, a diameter of 0.01 mm or more and a diameter of 6.0 mm or less.
- the in-plane size of the holes 41 intersecting in the penetrating direction may be 3.0 mm or less in diameter or 1.0 mm or less in diameter.
- the in-plane size (diameter) of the holes 41 intersecting in the penetrating direction is 1.0 mm as an example.
- the liquid passage portion 4 is provided at a position separated from the tip end (lower end) of the bottom portion 32a by a predetermined height H3 or more.
- the height H3 from the lower end of the bottom portion 32a to the lower end of the liquid passage portion 4 may be 1.0 mm or more when the diameter of the cell mass M to be cultured is 1 mm or less, and the height H3 is 5.0 mm. It may be as follows.
- the height H3 When the diameter of the cell mass M to be cultured is 0.1 mm or more and 2 mm or less, the height H3 may be 1.0 mm or more, and the height H3 may be 4.0 mm or less. Further, as a pattern of the relationship between the diameter of the cell mass M and the height H3 of the water surface of the culture solution, for example, when the diameter of the cell mass M is 1 mm or less, the height H3 may be 2 mm, and the cell mass M may be used. The height H3 may be 3 mm or more and 4 mm or less when the diameter of the cell is 1 mm or more and 2 mm or less.
- the height H3 is preferably set as low as possible so that the cell mass M is not exposed from the water surface of the culture solution and the culture solution does not hinder the observation in order to prevent drying, and the height H3 is not limited to the above range. Good. If the upper surface of the cell mass M and the water surface of the culture solution are too close to each other, the water surface directly above the cell mass M becomes convex due to the influence of surface tension, and the observation light does not become straight with respect to the microscope, which hinders observation. Therefore, for example, it is preferable to secure a distance of at least 1 mm or more or 2 mm or more as the distance from the upper part of the cell mass M to the water surface of the culture solution.
- the liquid passing portion 4 may be provided over a predetermined range R extending from a position separated by a height H3 from the lower end of the bottom portion 32a toward the plate 31.
- the range R is the entire region of the side wall 32b.
- the range R may be a part of the side wall 32b.
- a plurality of holes 41 are dispersedly provided in the range R.
- the height H3 is constant among the plurality of wells 32. In other words, among the plurality of wells 32, the heights H3 of the holes 41 located at the lowermost ends are equal to each other.
- the term "constant” used here means not only when each height H3 from the lower end of each bottom portion 32a to the lower end of each liquid passing portion 4 coincides, but also ⁇ 10% with respect to the average height of each height H3. Including the height within the range of.
- the plurality of holes 41 other than the hole 41 located at the lowermost end may be provided at an arbitrary position within the range R.
- FIG. 4A is a cross-sectional view showing a mold 5 used in the method for producing the cell culture vessel 1.
- a mold 5 for molding is prepared.
- FIG. 4B is a view of the upper mold 51 and the core 53 shown in FIG. 4A as viewed from below.
- 5A and 5B are diagrams showing each step of the method for producing the cell culture vessel 1.
- the mold 5 includes an upper mold 51, a lower mold 52, and a plurality of cores 53.
- the upper mold 51 and the lower mold 52 are molds for forming the outer shapes of the plate 31 and the well 32.
- the upper mold 51 has a plurality of convex portions 51a having a shape corresponding to the outer shape of each of the plurality of wells 32.
- the lower mold 52 has a plurality of concave portions 52a having a shape corresponding to the outer shape of each of the plurality of wells 32.
- Each of the convex portion 51a and the concave portion 52a is formed with a through hole through which a plurality of cores 53 pass.
- the plurality of cores 53 are molds for forming the liquid passage portion 4.
- FIG. 5A shows some wells 32 during molding and FIG. 5B shows some wells 32 after molding.
- Each core 53 forms a hole 41.
- the core 53 is a rod-shaped member having an outer peripheral surface having the same shape as the hole 41.
- the core 53 is used in a state of penetrating the upper mold 51 and the lower mold 52.
- the plurality of cores 53 may be arranged in parallel, for example, or the extending directions may intersect, depending on the position where the hole 41 is formed in the well 32.
- the plurality of cores 53 are arranged in the number of wells 32 according to the number of holes 41 formed.
- the hole 41 may be formed by one core 53 per well 32, or the hole 41 may be formed by a plurality of cores 53 per well 32.
- the pellet-shaped resin material is melted, the melted resin material is poured into the mold 5, and the cell container 3 is cured in that state. As a result, the cell container 3 in which the liquid passing portion 4 is provided in the well 32 is manufactured. As described above, the production of the cell culture container 1 is completed.
- the cell container 3 may be manufactured before the culture solution container 2 is manufactured, or the culture solution container 2 and the cell container 3 may be manufactured in parallel.
- cell culture method a method for culturing cells C and cell mass M will be described.
- culture of cell C and cell mass M means that cell C is immersed in culture medium S to aggregate, cell mass M is immersed in culture medium S to change its state, and differentiation. It means to let.
- Parts (a) to (d) of FIG. 6 are schematic cross-sectional views showing changes in the state of culture of cells C and cell mass M.
- Cell C immersed in the culture medium S (see part (a) of FIG. 6) aggregates over several hours to several days to form a cell mass M (see part (b) of FIG. 6). By continuing the culture, the cell mass M becomes more aggregated (see part (c) of FIG.
- This period varies depending on the type of cell C and the content of differentiation, and may be several days to several weeks. During this time, the cell mass M is optically observed as appropriate. Hereinafter, a specific description will be given.
- the cell culture vessel 1 is prepared (preparation step).
- a culture solution container 2 containing the culture solution S and a cell container 3 before allowing a plurality of wells 32 to enter the storage space V of the culture solution container 2 are prepared.
- the cell C is immersed in the culture solution S, and the cell C and the cell mass M obtained by agglutination of the cell C are cultured (culture step).
- the culture liquid S is also introduced into the culture space W of the well 32 via the liquid passage portion 4. Let it enter.
- the culture space W is filled with the culture solution S.
- Culture is started by seeding cells C in this culture space W.
- the cell C is in a state of being held in the well 32. In that state, it waits until a predetermined time elapses.
- the predetermined time is, for example, the time until the cell mass M is obtained by the aggregation of cells C.
- the predetermined time is appropriately set according to the cells C to be cultured, and is, for example, several hours to several days.
- FIG. 9 and 10 are cross-sectional views schematically showing a culture step of the cell culture method according to the embodiment.
- a part of the culture solution S is discharged from the culture space W of the well 32.
- the cell container 3 is taken out from the culture solution container 2.
- a part of the culture solution S is discharged from the well 32 via the liquid passing portion 4.
- the part of the culture solution S discharged here is a part of the culture solution S that was present above the lower end (the lowermost hole 41) of the liquid passage portion 4 in the culture space W of the well 32. is there.
- the part of the culture solution S in the plurality of wells 32 is discharged at once. Further, by this operation, the culture solution S remains only in the portion including the bottom portion 32a of the well 32 (the portion of the culture space W below the liquid passage portion 4). Therefore, the state in which the cell mass M is immersed in the culture solution S is maintained.
- observation is performed from below the well 32 (bottom 32a) by an observation device D (for example, a microscope). This operation is performed for each one or a plurality of wells 32.
- observation device D for example, a microscope
- the above-mentioned observation step may be executed only once or repeatedly at intervals. By repeatedly executing the observation step, the state of change in the cell mass M may be observed as appropriate (for example, periodically).
- the parts (a) to (c) of FIG. 11 are cross-sectional views schematically showing each observation step for observing the state of change in the cell mass M. Examples of changes in the cell mass M include an initial state of the cell mass M (see part (a) of FIG. 11) and a state of increased aggregation of the cell mass M (see part (b) of FIG. 11). ), The aggregation of the cell mass M is weakened (that is, the aggregation of the cell mass M is loosened), or the cell mass M is differentiated (see part (c) of FIG.
- the liquid passes by re-entering the plurality of wells 32 into the storage space V of the culture liquid container 2 containing the culture liquid S.
- the culture solution S is allowed to enter the culture space W of the well 32 via the part 4.
- the culture spaces W of the plurality of wells 32 are collectively filled with the culture solution S.
- the cell mass M is further cultured.
- the cell mass M is continuously cultured and observed again, so that the cell mass M is aggregated as shown in the part (b) of FIG.
- the state of strengthening and the state of differentiation of the cell mass M may be observed as shown in part (c) of FIG.
- the observation of the cell mass M is completed.
- the desired cell mass M is generated.
- the observation period varies depending on the type of cell and the content of differentiation, and may be several days to several weeks.
- the cell culture container 1, the method for producing the cell culture container 1, and the action and effect of the cell culture method described above will be described.
- the culture solution S is taken in and out of the well 32 via the liquid passing portion 4 provided on the side wall 32b. Therefore, the well 32 can be filled with the culture solution S only by inserting the well 32 into the culture solution container 2 containing the culture solution S. Further, when observing the culture state of the cell mass M, only a part of the culture solution S in the well 32 is held in the bottom 32a by simply ejecting the well 32 from the culture solution container 2. Only can be easily discharged. Therefore, it is possible to efficiently observe the cultured state of the cell mass M in the process of culturing the cell C and the cell mass M.
- the liquid passage portion 4 is a hole 41 penetrating the side wall 32b. According to the hole 41 penetrating the side wall 32b, a configuration capable of passing the culture solution S can be realized.
- the material constituting the well 32 is polystyrene.
- Polystyrene has a property of being difficult to adhere to cell C and cell mass M, and is therefore suitable for culturing cell C and cell mass M.
- well 32 By constructing well 32 from polystyrene, for example, cultured cells The lump or the like can be easily taken out from the well 32.
- the cell vessel 3 has a plurality of wells 32 connected to each other, and the height from the lower end of the bottom portion 32a to the lower end of the liquid passage portion 4 between the plurality of wells 32.
- H3 is constant.
- the culture solution S inside the well 32 is manually removed with a dropper or the like, the culture solution S remaining in the well 32 It is difficult to keep the amount constant. Further, as the number of wells 32 increases, the labor increases.
- the plurality of wells are simply ejected from the culture solution container 2. With a certain amount of the culture solution S held in the bottom 32a of the 32, only a part of the culture solution S in the well 32 can be easily discharged.
- the liquid passage portion 4 has a side wall 32b so that the height from the lower end of the bottom portion 32a to the lower end of the liquid passage portion 4 is 1.0 mm or more and 5.0 mm or less. It may be provided in.
- the height to the lower end of the liquid passing portion 4 is 1.0 mm or more, the cell mass or the like held on the bottom 32a can be more reliably observed even when observing the cell mass or the like. It can be immersed in the culture solution. Further, since the height to the lower end of the liquid passing portion 4 is 5.0 mm or less, when observing a cell mass or the like, it is easier to obtain an appropriate amount of the culture solution that inhibits the observation. It becomes possible to discharge.
- the step of preparing the cell culture container 1 and the cell C held in the well 32 are immersed in the culture solution S contained in the culture solution container 2, and the cells C and the cells C are immersed. It is provided with a step of culturing the cell mass M obtained by agglomeration of cells and a step of observing the cell mass M.
- the observing step the cell mass M in the well 32 is observed in a state where a part of the culture solution S is discharged from the well 32 through the liquid passage portion 4 by taking out the cell container 3 from the culture solution container 2. Thereby, in the step of observing, a part of the culture solution S can be easily discharged from the well 32.
- the cell culture method according to the present embodiment is particularly advantageous when the culture state of the cell mass M is repeatedly observed as appropriate.
- the method for manufacturing the cell culture vessel 1 includes a step of manufacturing the cell vessel 3 by molding, and the step is an upper mold having a convex portion 51a having a shape corresponding to the outer shape of the well 32. 51, a lower mold 52 arranged to face the convex portion 51a and having a concave portion 52a having a shape corresponding to the outer shape of the well 32, and a core 53 penetrating the convex portion 51a and the concave portion 52a. It has a step of preparing a mold 5 provided with a mold 5 and a step of curing a resin material poured into the mold 5 to form a well 32, and a hole 41 as a liquid passing portion 4 is formed by a core 53. You may.
- the cell culture container 1 can be easily formed. Therefore, by using the manufactured cell culture vessel 1, it is possible to efficiently observe the culture state of the cell mass M in the process of culturing the cell C and the cell mass M. Further, when the cell mass M is continuously cultured and the state of change in the cell mass M is appropriately observed, the manufactured cell culture vessel 1 is used to efficiently observe the desired culture state of the cell mass M. It will be possible to do well.
- the above-described embodiment describes an embodiment of a cell culture vessel, a method for producing a cell culture vessel, and a method for culturing a cell mass according to the present disclosure.
- the cell culture container, the method for producing the cell culture container, and the cell culture method according to the present disclosure may be obtained by arbitrarily modifying each of the above-described embodiments.
- the culture solution container 2 has one continuous storage space V, but may have a plurality of storage spaces V.
- 12A and 12B are cross-sectional views schematically showing the cell culture vessel 1A according to the modified example, respectively.
- the cell culture container 1A is different from the cell culture container 1 in that it has the culture solution container 2A instead of the culture solution container 2, and has the same configuration as the cell culture container 1 in other respects.
- the culture solution container 2A has a plurality of storage spaces V. Specifically, the culture solution container 2A further has a plurality of partition walls 24 arranged in the space defined by the bottom plate 21 and the four side walls 22. The partition wall 24 watertightly partitions the adjacent accommodation spaces V. In other words, the plurality of accommodation spaces V are separated from each other by the plurality of partition walls 24. A part of a plurality of wells 32 can be taken in and out of each accommodation space V. As an example, the culture solution container 2A has 12 storage spaces V, and the size of one storage space V is a size capable of accommodating one row (8 out of 96) wells 32. ..
- the partition wall 24 is erected on the upper surface of the bottom plate 21. Each partition wall 24 is provided at a position corresponding to each accommodation space V on the upper surface of the bottom plate 21.
- the thickness of the partition wall 24 is, for example, 1 mm.
- the height H4 of the partition wall 24 is, for example, 14.5 mm.
- the material constituting the partition wall 24 may be the same as the material constituting the bottom plate 21.
- the number of accommodation spaces V may be set arbitrarily.
- the culture solution container 2A may have the same number (96) of storage spaces V as the wells 32, or may have only two storage spaces V. When the culture solution container 2A has only two storage spaces V, it may have only one partition wall 24.
- the culture solution S since the culture solution S is taken in and out of the well 32 via the liquid passage portion 4 provided on the side wall 32b, the same action and effect as the cell culture container 1 can be obtained. Further, according to the culture solution container 2A, since the plurality of storage spaces V are watertightly partitioned, the culture solution S does not enter the wells 32 housed in each storage space V from the other storage spaces V. Therefore, contamination caused by the culture solution S contained in the other storage space V can be avoided.
- the number of wells 32 in the cell container 3 is an example, and may be set as appropriate.
- 13A to 13D are plan views schematically showing the cell containers 3B to 3E according to the modified example, respectively.
- the cell containers 3B to 3E differ from the cell container 3 in the number of wells 32, and have the same configuration as the cell container 3 in other respects.
- the cell culture vessel 1 may include a cell vessel 3B having only one well 32 instead of the cell vessel 3.
- the cell culture containers 1 and 1A may include a cell container 3C having two wells 32 instead of the cell container 3.
- the cell culture containers 1 and 1A may include a cell container 3C having 6 wells 32 instead of the cell container 3.
- the cell culture containers 1 and 1A may include a cell container 3C having eight wells 32 instead of the cell container 3.
- the cell container in the cell culture containers 1 and 1A may have a number of wells 32 other than the above, and may have, for example, 384 wells 32.
- the shape of the bottom 32a of the well 32 is an example, and may be changed as appropriate.
- 14A and 14B are cross-sectional views schematically showing wells 32F and 32G according to the modified example, respectively.
- the well 32F shown in FIG. 14A differs from the well 32 in that it has a bottom 33a instead of the bottom 32a, and has the same configuration as the well 32 in other respects.
- the bottom portion 33a has a peripheral wall 33b and a circular bottom wall 33c that closes below the peripheral wall 33b.
- the peripheral wall 33b has a cylindrical shape having the same diameter as the inner diameter of the side wall 32b. In this case, the entire shape of the culture space W defined by the bottom portion 33a and the side wall 32b is a cylindrical shape.
- the liquid passage portion 4 (hole 41) is provided in a range RF separated from the tip end (lower end) of the bottom portion 33a by the above-mentioned predetermined height H3.
- the well 32G shown in FIG. 14B differs from the well 32 in that it has a bottom 34a instead of the bottom 32a, and has the same configuration as the well 32 in other respects.
- the bottom portion 34a has a peripheral wall 34b and a circular bottom wall 34c that closes below the peripheral wall 34b.
- the peripheral wall 34b has a shape tapered in a conical shape from the lower end of the side wall 32b.
- the liquid passage portion 4 (hole 41) is provided in the range RG separated from the tip end (lower end) of the bottom portion 34a by the above-mentioned predetermined height H3.
- the culture solution S is taken in and out of the wells 32F and 32G via the liquid passing portion 4 provided on the side wall 32b. Therefore, it is possible to efficiently observe the cultured state of the cell mass M in the process of culturing the cell C and the cell mass M. Further, when the cell mass M is subsequently cultured and the state of change in the cell mass M is appropriately observed, it becomes possible to efficiently observe the desired culture state of the cell mass M.
- the configuration of the liquid passage portion 4 is an example, and may be changed as appropriate.
- the shape of the hole 41 of the liquid passage portion 4 may be changed as appropriate.
- the shape of the hole 41 may be, for example, an elliptical shape or a semicircular shape.
- the liquid passage portion 4 may be a combination of a plurality of holes 41 having different shapes.
- the liquid passage portion 4H shown in FIG. 15A is provided in a partial region (range RH) of the side wall 32b.
- the lower end of the range RH is a position separated by a height H3 from the tip (lower end) of the bottom portion 32a.
- the height of the range RH is, for example, 7.0 mm.
- the liquid passage portion 4H is one or more elongated holes 41H (slits).
- the elongated hole 41H penetrates the side wall 32b.
- the elongated hole 41H extends along the extending direction (vertical direction) of the side wall 32b.
- the shape of the elongated hole 41H is, for example, a rectangular shape.
- the height of the elongated hole 41H (in the present modification, the size in the longitudinal direction) is 0.01 mm or more and 7.0 mm or less, which is the same as the range RH (7.0 mm) as an example.
- the width of the elongated hole 41H (in this modified example, the size in the lateral direction) is, for example, 0.01 mm or more and 6.0 mm or less. Alternatively, the width of the elongated hole 41H may be 3.0 mm or less, or 1.0 mm or less.
- the liquid passage portion 4J shown in FIG. 15B is provided in a partial region (range RJ) of the side wall 32b.
- the range RJ is similar to, for example, the range RH.
- the liquid passage portion 4J is a plurality of holes 41 densely provided in the range RJ.
- the liquid passage portion 4K shown in FIG. 15C is provided in a partial region (range RK) of the side wall 32b.
- the range RK is the same as, for example, the ranges RH and RJ.
- the liquid passage portion 4K is a plurality of holes 41K densely provided in the range RK.
- the hole 41K differs from the hole 41 in that it exhibits a rhombus when viewed from the penetrating direction, and has the same configuration as the hole 41 in other respects.
- the height of the hole 41K is, for example, 0.01 mm or more and 7.0 mm or less.
- the width of the hole 41K is, for example, 0.01 mm or more and 6.0 mm or less. Alternatively, the width of the hole 41K may be 3.0 mm or less, or 1.0 mm or less.
- FIG. 16 is a cross-sectional view schematically showing the liquid passing portion 4L according to the modified example.
- the liquid passage portion 4L may be configured by forming at least a part of the side wall 32b (range R) with a material different from that of the bottom 32a.
- the range R is the entire region of the side wall 32b.
- examples of the material constituting the liquid passing portion 4L include a porous polymer material through which the culture liquid S passes. As a result, it is possible to realize a structure in which the culture solution S can pass through the region of the side wall 32b made of the porous polymer material.
- FIG. 17A is a cross-sectional view showing a mold 5A used in the method for producing a cell culture container according to a modified example.
- FIG. 17B is a cross-sectional view taken along the line XVIIB-XVIIB of FIG. 17A.
- FIG. 18 is a diagram showing a part of wells 32M after molding by the method for producing a cell culture container according to a modified example.
- the mold 5A has an upper mold 51A and a lower mold 52A.
- the upper mold 51A has a plurality of wells 32 and a plurality of convex portions 51a having the same shape as each of the wells 32.
- the lower mold 52A has a plurality of wells 32 and a plurality of concave portions 52a having the same shape as each of the wells 32.
- the upper mold 51A has one or more (four in the example of FIG. 17B) protrusions 51b that further project from the surface of the convex portion 51a.
- the protrusion 51b extends in the vertical direction (that is, the direction in which the upper mold 51A and the lower mold 52A face each other) over the range in which the liquid passing portion (the liquid passing portion 4M described later) is provided. ..
- the well 32M differs from the well 32 in that it has a liquid passing portion 4M instead of the liquid passing portion 4, and has the same configuration as the well 32 in other respects.
- the protrusion 51b forms a slit 41M as a liquid passage portion 4M.
- One protrusion 51b may form one slit 41M per well 32M, or a plurality of slits 41M may be formed by a plurality of protrusions 51b per well 32.
- the slit 41M as the liquid passage portion 4M is formed in the well 32M of the cell container 3 manufactured by molding, so that the cell culture container 1 can be easily formed. Therefore, by using the manufactured cell culture vessel 1, it is possible to efficiently observe the cell mass M in the process of culturing the cell C and the cell mass M. Further, when the cell mass M is subsequently cultured and the state of change in the cell mass M is appropriately observed, it becomes possible to efficiently observe the desired culture state of the cell mass M.
- FIGS. 20A and 20B are diagrams showing each step of the method for producing a cell culture vessel according to a modified example.
- FIG. 19A shows some wells 32 in the step of irradiating the laser
- FIG. 19B shows some wells 32 after molding by the step shown in FIG. 19A.
- the molded body 30 is molded by mold molding (step of molding the mold).
- the molded body 30 exhibits the outer shape of the plate 31 and the plurality of wells 32.
- the holes 41 are formed in the molded body 30 by laser irradiation (step of irradiating the laser).
- the laser device 6 is used in the step of irradiating the laser.
- the laser device 6 has a plurality of laser heads 61 arranged corresponding to the plurality of wells 32.
- Each laser head 61 outputs a laser beam in a direction diagonally intersecting the side wall 32b.
- a hole 41 that obliquely penetrates the side wall 32b may be formed.
- the step of irradiating the laser may be performed as follows.
- FIG. 20A shows some wells 32 in the step of irradiating another laser
- FIG. 20B shows some wells 32 after molding according to FIG. 20A.
- the laser device 7 may be used instead of the laser device 6.
- the laser device 7 has a plurality of laser heads 71 arranged corresponding to the plurality of wells 32. Each laser head 71 outputs a laser beam in a direction orthogonal to the side wall 32b.
- a shielding plate 72 may be arranged between two adjacent molded bodies 30.
- the laser beam may be irradiated over the plurality of molded bodies 30 by not arranging the shielding plate 72.
- a hole 41 may be formed through the side wall 32b in the thickness direction of the side wall 32b.
- the cell container 3 provided with the liquid passing portion 4 in the well 32 is manufactured.
- the manufactured well 32 is formed with a hole 41 as a liquid passage portion 4 by laser irradiation, so that the cell culture vessel 1 can be easily formed. Therefore, by using the manufactured cell culture vessel 1, it is possible to efficiently observe the cell mass M in the process of culturing the cell C and the cell mass M. Further, when the cell mass M is subsequently cultured and the state of change in the cell mass M is appropriately observed, it becomes possible to efficiently observe the desired culture state of the cell mass M.
- 21 to 28 are diagrams schematically showing wells according to a further modification.
- the well 32 is taken out from the culture solution container 2 when observing the cell mass M by the light emitted from the light source L.
- the culture solution S discharged from the liquid passing portion 4 drips (see FIG. 29) and adheres to the outside of the bottom portion 32a of the well 32.
- the droplet of the culture solution S may be located on the line connecting the light source L, the cell mass M, and the observation device D, and may hinder the observation of the cell mass M. Therefore, for example, as shown in FIGS.
- the guiding members 80, 81 that guide the flow of the culture solution S discharged from the liquid passing portion 4 on the outer peripheral surfaces of the bottom portions 32a, 33a, 34a. , 82 may be provided respectively.
- Each of the guiding members 80 to 82 is, for example, a tubular member extending in a circumferential shape.
- Each of the guiding members 80 to 82 is provided on the outer peripheral surface of each well 32, 32F, 32G in a region on the bottom 32a, 33a, 34a side of the liquid passing portion 4, and is provided on the opposite side of the liquid passing portion 4. (That is, it extends to the lower side of the figure).
- the guide members 80 to 82 need only have a length that does not transmit the culture solution S to the bottoms 32a, 33a, 34a, and have a length equal to the lower ends of the bottoms 32a, 33a, 34a. It may be longer, or it may be longer.
- the length of the guide members 80 to 82 can be, for example, 0.5 mm or more and 10 mm or less. This prevents the observation of the cell mass M due to the dripping of the culture solution S discharged from the liquid passage portion 4 when the cell container 3 having the wells 32, 32F or 32G is taken out from the culture solution container 2. Can be done.
- the guide member 83 may be provided so as to incline toward the outside of the well 32. In this case, the guide member 83 may be inclined outward at an inclination angle of 90 degrees or less with respect to the vertical direction.
- the guiding member 84 may be provided so as to incline toward the inside of the well 32. In this case, it may be inclined inward with an inclination angle of 45 degrees or less with respect to the vertical direction. At this angle, the installation of the observation device D is not hindered.
- the guiding member 80 may be configured to extend linearly downward from the side wall 32b, but as shown in FIG.
- the guiding member 85 is radially downward with respect to the side wall 32b. It may be configured to be located inside the bottom portion 32a and extend downward from the middle portion of the bottom portion 32a. However, in the configuration shown in FIG. 26, the facing distance of the guiding member 85 can be made larger than the diameter of the cell mass M to be observed. For example, when the diameter of the cell mass M is 1 mm or less, the installation location of the guide member 85 can be a region having a diameter of 1 mm or more from the center of the bottom portion 32a. As a result, it is possible to prevent the observation of the cell mass M by the observation device D from being hindered.
- the guiding member is configured to prevent dripping, it is not necessary to be arranged on the entire circumference of the bottom portion 32a.
- the liquid passing portion 4 is one of the side walls 32b.
- the guiding member 86 may be provided only on the side where the liquid passing portion 4 is provided.
- the guiding member 86 may be a member having a semi-cylindrical shape or an arc-shaped cross section.
- the liquid passing portion 4 A hole 87a may be provided in a part of the guide member 87 on the side where the guide member 87 is not provided.
- the cell culture vessel 1 may be further provided with the dripping removing device 90.
- the dripping remover 90 is made of, for example, resin or metal.
- a gauze 91 for absorbing water droplets S1 of the culture solution S may be installed on the dripping remover 90.
- the base itself of the dripping remover 90 is made of an absorbent material (sponge material), and the droplet S1 of the culture solution S adhering to the outer periphery of the bottom 32a of the well 32 of the cell culture container 1 is formed. It may be absorbed and removed before observation.
- the surface of the dripping removing device 90 may have an uneven shape so as to avoid the guiding member 80 or the like, or may have a flat surface when the guiding member 80 or the like is absent.
- the base of the dripping remover 90 or the gauze 91 arranged on the base may be made of a material that can be sterilized in order to prevent contamination.
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Abstract
Description
本出願は、2019年11月14日出願の日本出願第2019-206248号に基づく優先権を主張し、前記日本出願に記載された全ての記載内容を援用する。
細胞培養容器を用いて細胞塊等の培養が行われる際、ウェルの内部は、細胞塊等の培養のために培養液によって満たされる。細胞塊等の培養の際には、培養液の蒸発によって細胞塊等が乾燥してしまうことを避ける観点から、所定量以上の培養液がウェルの内部に存在していることが求められる。しかしながら、培養の過程で細胞塊を光学的に観察しようとすると、この培養液の光吸収によってウェルを観察するための透過光量を十分に得られない場合がある。そのような場合、ウェルの内部の培養液を減らす必要が生じる。培養液を減らすためには、例えば、ウェルの内部の培養液をスポイト等によって手作業で抜くことが考えられ、手間がかかる。
本開示によれば、細胞塊を培養する過程において細胞塊の培養状態の観察を効率よく行うことが可能となる。
最初に、本開示の実施形態の内容を列記して説明する。一実施形態に係る細胞培養容器は、培養液を収容するように構成された第1容器と、培養液によって培養される細胞および細胞塊のいずれか一方または両方を保持した状態で第1容器に対して出し入れ可能な少なくとも一つのウェルを有する第2容器と、を備える。少なくとも一つのウェル各々は、培養液を保持可能な底部と、底部の周縁部から延在する側壁と、を有する。側壁には、第1容器に収容された培養液が通過可能な液通過部が設けられている。
本開示に係る細胞培養容器、細胞培養方法、および細胞培養容器の製造方法の具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。以下の説明においては、同一要素または同一機能を有する要素には同一の符号を付し、重複する説明を省略する場合がある。
図1および図2は、一実施形態に係る細胞培養容器1を模式的に示す断面図である。細胞培養容器1は、培養液Sを用いて細胞Cおよび細胞塊M(図8を参照)を培養する際に用いられる。図1では、細胞Cが仮想線にて示されている。具体的には、細胞培養容器1は、培養液S中において、細胞Cを凝集させて所望の状態の細胞塊Mを得るための容器である。細胞培養容器1は、培養液容器2(第1容器)と、細胞容器3(第2容器)と、を備える。
以上説明した細胞培養容器1を製造する製造方法の一例について説明する。はじめに、培養液容器2をモールド成形によって製造する(第1容器を製造する工程)。例えば、ペレット状の樹脂材を溶融させ、溶融した樹脂材を金型に流し込み、その状態で硬化させる。これにより、培養液容器2が製造される。次に、細胞容器3をモールド成形によって製造する(第2容器を製造する工程)。図4Aは、細胞培養容器1の製造方法において用いられる金型5を示す断面図である。第2容器を製造する工程では、まず、モールド成形のための金型5を準備する。図4Bは、図4Aに示す上部金型51および中子53を下方から見た図である。図5Aおよび図5Bは、細胞培養容器1の製造方法の各工程を示す図である。
次に、細胞培養方法として、細胞Cおよび細胞塊Mの培養方法について説明する。本明細書において、「細胞Cおよび細胞塊Mの培養」とは、細胞Cを培養液Sに浸して凝集させること、細胞塊Mを培養液Sに浸して状態を変化させること、および、分化させることをいう。図6の(a)部~(d)部は、細胞Cおよび細胞塊Mの培養の状態の変化を示す模式的な断面図である。培養液Sに浸された細胞C(図6の(a)部を参照)は、数時間から数日かけて凝集して細胞塊Mとなる(図6の(b)部を参照)。細胞塊Mは、更に培養を継続することにより、凝集が強まったり(図6の(c)部を参照)、分化したりする(図6の(d)部を参照)。この期間は細胞Cの種類や分化の内容によって異なり、数日から数週間になることもある。この間、適宜、細胞塊Mを光学的に観察する。以下、具体的に説明する。
以上説明した細胞培養容器1、細胞培養容器1の製造方法、および細胞培養方法の作用効果について説明する。細胞培養容器1においては、側壁32bに設けられた液通過部4を介して培養液Sがウェル32に出し入れされる。このため、培養液Sが収容された培養液容器2にウェル32を進入させるだけで、ウェル32を培養液Sで満たすことができる。また、細胞塊Mの培養状態を観察する際には、培養液容器2からウェル32を退出させるだけで、底部32aに培養液Sを保持した状態で、ウェル32内の培養液Sの一部のみを簡易に排出することができる。したがって、細胞Cおよび細胞塊Mの培養の過程において細胞塊Mの培養状態の観察を効率よく行うことが可能となる。
以上の実施形態は、本開示に係る細胞培養容器、細胞培養容器の製造方法、および細胞塊の培養方法の一実施形態について説明したものである。本開示に係る細胞培養容器、細胞培養容器の製造方法、および細胞培養方法は、上述した各実施形態を任意に変更したものとすることができる。
2,2A…培養液容器(第1容器)
3,3B,3C,3D,3E,…細胞容器(第2容器)
4,4H,4J,4K,4L,4M…液通過部
5,5A…金型
6,7…レーザー装置
21…底板
22…側壁
23…開口部
24…隔壁
30…成形体
31…プレート
31a…接続孔
32,32F,32G,32M,32L…ウェル
32a,33a,34a…底部
32b…側壁
33b,34b…周壁
33c,34c…底壁
41,41K…孔
41H…長孔
41M…スリット
51,51A…上部金型
51a…凸状部
51b…突起
52,52A…下部金型
52a…凹状部
53…中子
61,71…レーザーヘッド
72…遮蔽板
80,81,82,83,84,85,86,87…誘導部材
87a…孔
90…液だれ除去装置
91…ガーゼ
C…細胞
D…観察装置
H1,H2,H3,H4…高さ
L…光源
M…細胞塊
P…ピッチ
R,RF,RG,RH,RJ,RK…範囲
S…培養液
S1…液滴
V…収容空間
W…培養空間
φ1,φ2…内径
Claims (15)
- 培養液を収容するように構成された第1容器と、
前記培養液によって培養される細胞および細胞塊のいずれか一方または両方を保持した状態で前記第1容器に対して出し入れ可能な少なくとも一つのウェルを有する第2容器と、
を備え、
前記少なくとも一つのウェル各々は、
前記培養液を保持可能な底部と、
前記底部の周縁部から延在する側壁と、を有し、
前記側壁には、前記第1容器に収容された前記培養液が通過可能な液通過部が設けられている、
細胞培養容器。 - 前記液通過部は、前記側壁を貫通する少なくとも一つの孔である、
請求項1に記載の細胞培養容器。 - 前記少なくとも一つのウェルを構成する材料は、ポリスチレンである、
請求項1または請求項2に記載の細胞培養容器。 - 前記液通過部は、前記側壁の少なくとも一部の領域であって、
前記領域は、前記培養液を通過させる多孔質な高分子材料によって構成されている、
請求項1に記載の細胞培養容器。 - 前記少なくとも一つのウェルは、互いに連結された複数のウェルである、
請求項1から請求項4のいずれか一項に記載の細胞培養容器。 - 前記複数のウェル各々の前記各底部の下端から前記各液通過部の下端までの高さは一定である、
請求項5に記載の細胞培養容器。 - 前記第1容器は、
前記複数のウェルのうちの一部をそれぞれ出し入れ可能な複数の収容空間と、
前記複数の収容空間を互いに隔てる少なくとも一つの隔壁と、を有する、
請求項5又は請求項6に記載の細胞培養容器。 - 前記底部の下端から前記液通過部の下端までの高さが1.0mm以上で且つ5.0mm以下である、
請求項1から請求項7のいずれか1項に記載の細胞培養容器。 - 前記少なくとも一つのウェル各々は、前記液通過部から排出される前記培養液の流れを誘導する誘導部材を更に有する、
請求項1から請求項8の何れか一項に記載の細胞培養容器。 - 前記誘導部材は、前記少なくとも一つのウェル各々の外周面上であって前記液通過部よりも前記底部の下端側の領域に設けられ、前記液通過部とは逆側に延在する、
請求項9に記載の細胞培養容器。 - 請求項1から請求項10のいずれか一項に記載の細胞培養容器を準備する工程と、
前記少なくとも一つのウェルに保持された前記細胞を前記第1容器に収容された前記培養液に浸して、前記細胞と前記細胞が凝集して得られた細胞塊とを培養する工程と、
前記細胞塊を観察する工程と、を備え、
前記細胞塊を観察する工程は、前記第2容器を前記第1容器から取り出すことを含み、前記液通過部を介して前記少なくとも一つのウェルから前記培養液の一部を排出した状態で、前記少なくとも一つのウェル内の前記細胞塊を観察する、
細胞培養方法。 - 前記細胞塊を観察する工程は、前記第2容器を前記第1容器から取り出した後に前記第2容器の前記底部の外周に付着している液を除去することを含む、
請求項11に記載の細胞培養方法。 - 請求項1に記載の細胞培養容器を製造する方法であって、
モールド成形によって前記第2容器を製造する工程を備え、
前記工程は、
前記少なくとも一つのウェル各々の外形状に対応する形状の凸状部を有する上部金型と、前記凸状部と向かい合って配置され、前記少なくとも一つのウェル各々の外形状に対応する形状の凹状部を有する下部金型と、前記凸状部および前記凹状部を貫通する中子と、を備える金型を準備する工程と、
前記金型に流し込んだ樹脂材を硬化させて前記少なくとも一つのウェルを含む前記第2容器を成形する工程と、
を有し、
前記中子によって前記液通過部としての孔を形成する、
細胞培養容器の製造方法。 - 請求項1に記載の細胞培養容器を製造する方法であって、
モールド成形によって前記第2容器を製造する工程を備え、
前記工程は、
前記少なくとも一つのウェル各々の外形状に対応する形状の凸状部を有する上部金型と、前記凸状部と向かい合って配置され、前記少なくとも一つのウェル各々の外形状に対応する形状の凹状部を有する下部金型と、を備える金型を準備する工程と、
前記金型に流し込んだ樹脂材を硬化させて前記少なくとも一つのウェルを含む前記第2容器を成形する工程と、
を有し、
前記上部金型は、上下方向に沿って延び、前記凸状部から突出して前記凹状部に接する突起を有し、
前記突起によって前記液通過部としてのスリットを形成する、
細胞培養容器の製造方法。 - 請求項1に記載の細胞培養容器を製造する方法であって、
モールド成形によって前記少なくとも一つのウェルの外形状を呈する成形体を成形する工程と、
レーザー照射によって前記成形体に前記液通過部としての孔を形成する工程と、を備える、細胞培養容器の製造方法。
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