EP0812355A2 - Agent for treating tumours and other hyperplasia - Google Patents

Agent for treating tumours and other hyperplasia

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Publication number
EP0812355A2
EP0812355A2 EP96903923A EP96903923A EP0812355A2 EP 0812355 A2 EP0812355 A2 EP 0812355A2 EP 96903923 A EP96903923 A EP 96903923A EP 96903923 A EP96903923 A EP 96903923A EP 0812355 A2 EP0812355 A2 EP 0812355A2
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Prior art keywords
composition according
antisense
sequence
mrna
gene
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German (de)
French (fr)
Inventor
Michael Strauss
Jiri Bartek
Jiri Lukas
Volker Sandig
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Max Planck Gesellschaft zur Foerderung der Wissenschaften eV
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Max Planck Gesellschaft zur Foerderung der Wissenschaften eV
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Priority claimed from DE19539130A external-priority patent/DE19539130C2/en
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Publication of EP0812355A2 publication Critical patent/EP0812355A2/en
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    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
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    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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    • C12N2310/00—Structure or type of the nucleic acid
    • C12N2310/10—Type of nucleic acid
    • C12N2310/11—Antisense
    • C12N2310/111—Antisense spanning the whole gene, or a large part of it

Definitions

  • the invention relates to an agent for the therapy of tumors and other hyperplasias. Areas of application of the invention are medicine and the pharmaceutical industry.
  • chemotherapeutic agents have been used in a few tumor diseases, e.g. Leukaemias, which have been shown to be particularly effective, are only unsatisfactorily effective in most tumor diseases and have too many side effects.
  • the concept of gene therapy has revolutionized the strategies for tumor therapy in the past 5 years. With genes and their products a selective effect on the growth of tumors but also other hyperplasias such as Vascular muscle cell proliferation after injury from catheter surgery is the goal of these strategies.
  • An already successfully implemented strategy consists in the selective killing of proliferating cells by introducing a gene, the product (enzyme) of which converts an initially non-toxic chemotherapeutic agent into a product which has a selective toxic effect on tumor cells.
  • a gene the product (enzyme) of which converts an initially non-toxic chemotherapeutic agent into a product which has a selective toxic effect on tumor cells.
  • the genes that are used for this are the thymidine kinase (tk) gene from Herpes si plex viruses and the bacterial cytosine desamin gene. Thy idin kinase converts the nucleoside ganciclovir into the toxic triphosphate, which leads to chain termination and thus cell death after incorporation into the DNA of replicating cells.
  • tk thymidine kinase
  • Thy idin kinase converts the nucleoside ganciclovir into the toxic triphosphate, which leads to chain termination and thus cell death after incorporation into the DNA of replicating cells.
  • the great advantage of this method compared to classic chemotherapy is that Selectivity of the toxic effect. It is not necessary for all tumor cells to be transduced with the tk gene, since the ganciclovir is passed on to neighboring cells via so-called "gap junctions", but can only poison growing cells. This effect is called “bystander” (Ram, Z. et al.
  • a recently pursued path is based on the introduction of so-called tumor suppressors into the proliferating cells with the aid of effective viral vectors (Bacchetti, S. and Graham, FL / 1993 / Int, J. Oncol. 3, 781-788; Zhang, WW et al . / 1994 / Cancer Gene Therapy 1, 5-13).
  • the two tumor suppressors used to date are the p53 gene and the Rb gene. Both encode cell division repressors. However, their inhibitory effect on cell division can only be achieved in tumors that have a defect in the endogenous tumor suppressors. This is approximately 15% for the Rb gene and approximately 50% for the p53 gene.
  • Point mutants of R58 are dominant over the normal protein, i.e. In tumor cells, significantly more protein must be expressed from the normal gene introduced than from the endogenous mutant gene in order to achieve an inhibitory effect.
  • cyclin and the cyclin-dependent kinases complexed with them
  • negative regulators are the kinase inhibitors (Sherr, CJ / 1994 / Cell 79, 551-555).
  • the invention aims to provide a new agent for the therapy of tumors and other hyperplasias. It is based on the task of developing a means that inhibits the division growth of tumors or other hyperplastic cells.
  • the invention is implemented according to claim 1, the subclaims are preferred variants.
  • the agent according to the invention is characterized in that it
  • the essence of the agent is that a gene which codes for the formation of a cdK inhibitor, or an antisense sequence or a ribozy against an raRNA for a Gl-phase-specific cyclin or a cdK in a suitable vector is present and used for gene transfer to tumor cells or other hyperplastic cells.
  • Those vectors which allow 100% infection of the target tissue are preferably used as vectors.
  • Such vectors are derived, for example, from adenovirus and are specific for the tumor tissue by using a suitable promoter.
  • Preferred cooperating tumor suppressor genes are MTS-1 (pl6) and MTS-2 (pl5).
  • antisense or ribozyme sequences are used, those sequences are preferably selected which are directed against the mRNA of the kinases cdk2, cdk4, cdk5 or cdk6 or the cyclins Dl, D2, D3 or E.
  • the invention also includes Sequences that are directed against the promoters of the cdks or of cyclins.
  • the antisense or ribozyme sequence is preferably produced synthetically and used as an oligonucleotide.
  • the antisense sequences are particularly preferred.
  • a further preferred embodiment of the invention consists in the combination of a tumor suppressor gene cooperating with the tumor suppressor Rb, an antisense or ribozyme sequence against antagonistic kinases or cyclins or another substance which inhibits the phosphorylation of the Rb protein with the p53 gene. In addition to the cytostatic effect, this also largely kills the tumor cells.
  • the combination of the cooperating is particularly preferred Do orsuppressorgens MTS-1 (pl6) with the p53 gene.
  • the complete cDNA of the human cyclin Dl gene is cloned in antisense orientation behind the CMV promoter in pX. This recombinant is transfected into different tumor cell lines, together with the marker gene CD20. After 48 hours, the cells are detached from the culture dishes by tryspination and analyzed in the fluorescence-activated cell sorter according to 2 parameters:
  • the cDNA for pl6 is cloned into pX behind the CMV promoter.
  • the resulting recombinant is transfected into different tumor cell lines together with the CD20 gene.
  • the cells in the FACS are selected for CD20 expression and the DNA profile is recorded.
  • a typical result is shown in Figure 1.
  • the result shows a clear inhibitory effect on the transition to the S phase in Rb-positive cells using the normal pl6 gene.
  • the cDNA of the human pl ⁇ gene is cloned into the adenovirus transfer plasmid p ElsplA under the control of the CMV promoter.
  • This plasmid is transfected together with the helper plasmid pJM17 by Ca ** coprecipitation into HEK 293 cells.
  • the homologous recombination between the two plasmids produces El-deficient viruses, plaque-cleaned and checked by PCR amplification and restriction digestion.
  • a purified virus stock is obtained by separating the cell lysate in the CsCl 2 gradient. The virus stock is titered using a plaque assay.
  • the effective amount of virus / cell is determined by infection with an adenovirus expressing ⁇ -galactosidase and histochemical detection of the enzyme.
  • the tumor cell lines Hu H7, Lovo, MCF7 (pl6-) as well as HepG2, BT 549 and C33A (pl6 +) are infected with Ad pl ⁇ or Ad ßgal and pl ⁇ is detected in a Western blot.
  • Virus-mediated pl ⁇ expression exceeds the endogenous level in HepG2, BT 549 and C33A cells at least 5-fold. Expression of pl6 prevents accumulation of the phosphorylated form of Rb. (Fig. 2)

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Abstract

The invention concerns an agent for treating tumours and other hyperplasia. Areas of application of the invention include medicine and the pharmaceutical industry. The agent according to the invention is characterized in that it comprises: a tumour suppressor gene co-operating with the tumour suppressor Rb; an antisense or ribozyme sequence active against antagonistic kinases or cyclines; or another substance which inhibits phosphorylation of the Rb protein.

Description

Mittel zur Therapie von Tumoren und anderen HyperplasienAgents for the therapy of tumors and other hyperplasias
Beschreibungdescription
Die Erfindung betrifft ein Mittel zur Therapie von Tumoren und anderen Hyperplasien. Anwendungsgebiete der Erfindung sind die Medizin und die pharmazeutische Industrie.The invention relates to an agent for the therapy of tumors and other hyperplasias. Areas of application of the invention are medicine and the pharmaceutical industry.
Es existiert bereits eine Vielzahl von Mitteln gegen Tumor¬ wachstum und Hyperplasien, wobei es sich in der Regel um Substanzen handelt, die in irgendeiner Weise in den Zellstoff¬ wechsel eingreifen und Tumorzellen mehr oder weniger selektiv abtöten. Diese sogenannten Chemotherapeutika haben sich bei einigen wenigen Tumorkrankheiten, wie z.B. Leukämien, als besonders wirksam erwiesen, sind aber bei den meisten Tumor¬ erkrankungen nur unbefriedigend wirksam und mit zu vielen Neben¬ wirkungen behaftet. Das Konzept der Gentherapie hat in den letzten 5 Jahren die Strategien zur Tumortherapie revolu¬ tioniert. Mit Genen und deren Produkten einen selektiven Effekt auf das Wachstum von Tumoren aber auch anderen Hyperplasien, wie z.B. der Gefäßmuskelzellproliferation nach Verletzung durch Kathedereingriffe, auszuüben, ist das Ziel dieser Strategien.There are already a large number of agents against tumor growth and hyperplasia, which are generally substances which intervene in the cell metabolism in some way and kill tumor cells more or less selectively. These so-called chemotherapeutic agents have been used in a few tumor diseases, e.g. Leukaemias, which have been shown to be particularly effective, are only unsatisfactorily effective in most tumor diseases and have too many side effects. The concept of gene therapy has revolutionized the strategies for tumor therapy in the past 5 years. With genes and their products a selective effect on the growth of tumors but also other hyperplasias such as Vascular muscle cell proliferation after injury from catheter surgery is the goal of these strategies.
Eine bereits erfolgreich umgesetzte Strategie besteht in der selektiven Abtötung proliferierender Zellen durch Einbringen eines Gens, dessen Produkt (Enzym) ein zunächst ungiftiges Che otherapeutikum in ein Produkt umwandelt, das selektiv toxisch auf Tumorzellen wirkt. (Moolten, F.L. et al. /1990/ Human Gene Therapy 1, 125-134;Culver, K.W. et al. /1992/ Science 256, 1550-1552)An already successfully implemented strategy consists in the selective killing of proliferating cells by introducing a gene, the product (enzyme) of which converts an initially non-toxic chemotherapeutic agent into a product which has a selective toxic effect on tumor cells. (Moolten, F.L. et al. / 1990 / Human Gene Therapy 1, 125-134; Culver, K.W. et al. / 1992 / Science 256, 1550-1552)
Die Gene, welche hierfür Anwendung finden, sind das Thymidin- kinase (tk)-Gen von Herpes si plex Viren sowie das bakterielle Cytosin-Desamin Gen. Die Thy idinkinase wandelt das Nukleosid Ganciclovir in das toxische Triphosphat um, welches nach Einbau in die DNA replizierender Zellen zum Kettenabbruch und damit zum Zelltod führt. Der große Vorteil dieser Methode gegenüber der klassischen Chemotherapie besteht in der Selektivität des toxischen Effekts. Dabei ist es nicht erforderlich, daß alle Tumorzellen mit dem tk Gen transduziert werden, da das Ganciclovir über sogenannte "gap junctions" an benachbarte Zellen weitergegeben wird, aber nur wachsende Zellen vergiften kann. Dieser Effekt wird "bystander" genannt (Ram, Z. et al. /1993/ Cancer Res. 53, 83-88).The genes that are used for this are the thymidine kinase (tk) gene from Herpes si plex viruses and the bacterial cytosine desamin gene. Thy idin kinase converts the nucleoside ganciclovir into the toxic triphosphate, which leads to chain termination and thus cell death after incorporation into the DNA of replicating cells. The great advantage of this method compared to classic chemotherapy is that Selectivity of the toxic effect. It is not necessary for all tumor cells to be transduced with the tk gene, since the ganciclovir is passed on to neighboring cells via so-called "gap junctions", but can only poison growing cells. This effect is called "bystander" (Ram, Z. et al. / 1993 / Cancer Res. 53, 83-88).
Es hat sich aber gezeigt, daß eine größere Zahl von Tumoren resistent gegenüber dem "bystander" Effekt ist. Darüber hinaus ist die Toxizität des Ganciclovir für den Patienten nicht zu unterschätzen. Daher wird intensiv nach alternativen Gen¬ therapie-Strategien für die Tumortherapie gesucht.However, it has been shown that a larger number of tumors are resistant to the "bystander" effect. In addition, the toxicity of ganciclovir to the patient should not be underestimated. Therefore, alternative gene therapy strategies for tumor therapy are being searched intensively.
Ein kürzlich beschrittener Weg basiert auf der Einführung so¬ genannter Tumorsuppressoren in die proliferierenden Zellen mit Hilfe effektiver viraler Vektoren (Bacchetti, S. und Graham, F.L. /1993/ Int, J. Oncol. 3, 781-788; Zhang, W.W. et al. /1994/ Cancer Gene Therapy 1, 5-13).A recently pursued path is based on the introduction of so-called tumor suppressors into the proliferating cells with the aid of effective viral vectors (Bacchetti, S. and Graham, FL / 1993 / Int, J. Oncol. 3, 781-788; Zhang, WW et al . / 1994 / Cancer Gene Therapy 1, 5-13).
Die beiden bisher verwendeten Tumorsuppressoren sind das p53- Gen und das Rb-Gen. Beide kodieren Repressoren der Zellteilung. Ihr Hemmeffekt auf die Zellteilung ist aber nur bei solchen Tumoren zu erreichen, die einen Defekt in den endogenen Tumorsuppressoren aufweisen. Dies sind beim Rb-Gen etwa 15% und beim p53-Gen etwa 50%.The two tumor suppressors used to date are the p53 gene and the Rb gene. Both encode cell division repressors. However, their inhibitory effect on cell division can only be achieved in tumors that have a defect in the endogenous tumor suppressors. This is approximately 15% for the Rb gene and approximately 50% for the p53 gene.
Dabei sind Punktmutanten des R58 dominant gegenüber dem Normalprotein, d.h. in Tumorzellen muß wesentlich mehr Protein vom eingebrachten Normalgen exprimiert werden als vom endogenen Mutantengen, um einen Hemmeffekt zu erzielen.Point mutants of R58 are dominant over the normal protein, i.e. In tumor cells, significantly more protein must be expressed from the normal gene introduced than from the endogenous mutant gene in order to achieve an inhibitory effect.
Die Zellteilungsforschung hat in den letzten Jahren zur Ent¬ deckung zahlreicher positiver und negativer Regulatoren der Zellteilung geführt. Positive Regulatoren sind die sogenannten Cykline und die mit ihnen komplexierten Cyklin-abhängigen Kinasen (cdK); negative Regulatoren sind die Kinase- Inhibitoren (Sherr, C.J. /1994/ Cell 79, 551-555). Die Erfindung hat das Ziel, ein neues Mittel zur Therapie von Tumoren und anderen Hyperplasien bereitzustellen. Ihr liegt die Aufgabe zugrunde, ein Mittel zu entwickeln, daß das Teilungswachstum von Tumoren oder anderen hyperplastischen Zellen hemmt.In recent years, cell division research has led to the discovery of numerous positive and negative regulators of cell division. Positive regulators are the so-called cyclin and the cyclin-dependent kinases (cdK) complexed with them; negative regulators are the kinase inhibitors (Sherr, CJ / 1994 / Cell 79, 551-555). The invention aims to provide a new agent for the therapy of tumors and other hyperplasias. It is based on the task of developing a means that inhibits the division growth of tumors or other hyperplastic cells.
Die Erfindung wird gemäß Anspruch 1 realisiert, die Unter¬ ansprüche sind Vorzugsvarianten. Das erfindungsgemäße Mittel ist dadurch gekennzeichnet, daß esThe invention is implemented according to claim 1, the subclaims are preferred variants. The agent according to the invention is characterized in that it
- ein mit dem Tumorsuppressor Rb kooperierendes- A cooperating with the tumor suppressor Rb
Tumorsuppressorgen,Tumor suppressor gene,
- eine antisense- oder Ribozym-Sequenz gegen antagonistische- an antisense or ribozyme sequence against antagonistic
Kinasen bzw. Cycline oderKinases or Cyclins or
- eine andere die Phosphorylierung des Rb-Proteins hemmendeanother inhibiting the phosphorylation of the Rb protein
Substanz enthält.Contains substance.
Das Wesen des Mittels besteht darin, daß ein Gen, welches für die Bildung eines cdK-Inhibitors kodiert, oder eine antisense- Seguenz bzw. ein Ribozy gegen eine raRNA für ein Gl-Phase-spe- zifisches Cyklin oder eine cdK in einem geeigneten Vektor klomiert vorliegt und für den Gentransfer in Tumorzellen oder andere hyperplastische Zellen eingesetzt wird. Als Vektoren finden bevorzugt solche Verwendung, die eine 100%ige Infektion des Zielgewebes erlauben. Solche Vektoren sind zum Beispiel vom Adenovirus abgeleitet und durch Verwendung eines geeigneten Promoters spezifisch für das Tumorgewebe.The essence of the agent is that a gene which codes for the formation of a cdK inhibitor, or an antisense sequence or a ribozy against an raRNA for a Gl-phase-specific cyclin or a cdK in a suitable vector is present and used for gene transfer to tumor cells or other hyperplastic cells. Those vectors which allow 100% infection of the target tissue are preferably used as vectors. Such vectors are derived, for example, from adenovirus and are specific for the tumor tissue by using a suitable promoter.
Bevorzugte kooperierende Tumorsuppressorgene sind MTS-1 (pl6) und MTS-2 (pl5).Preferred cooperating tumor suppressor genes are MTS-1 (pl6) and MTS-2 (pl5).
Im Falle des Einsatzes von antisense- oder Ribozym-Seguenzen werden bevorzugt solche Sequenzen gewählt, die gegen die mRNA der Kinasen cdk2, cdk4, cdk5 oder cdk6 bzw. der Cycline Dl, D2, D3 oder E gerichtet ist. Die Erfindung umfaßt auch Sequenzen, die gegen die Promotoren der cdks oder von Cyclinen gerichtet ist.If antisense or ribozyme sequences are used, those sequences are preferably selected which are directed against the mRNA of the kinases cdk2, cdk4, cdk5 or cdk6 or the cyclins Dl, D2, D3 or E. The invention also includes Sequences that are directed against the promoters of the cdks or of cyclins.
Im Falle vom phosphorylierungshemmenden Substanzen kommen vor¬ zugsweise solche zum Einsatz, die spezifisch die Kinasen cdk4 oder cdk6 hemmen.In the case of substances which inhibit phosphorylation, preference is given to those which specifically inhibit the kinases cdk4 or cdk6.
Die antisense- oder Ribozymsequenz wird gemäß der Erfindung be¬ vorzugt synthetisch hergestellt und als Oligonukleotid ein¬ gesetzt.According to the invention, the antisense or ribozyme sequence is preferably produced synthetically and used as an oligonucleotide.
Besonders bevorzugt sind die antisense-SequenzenThe antisense sequences are particularly preferred
- gegen die RNA von cdk2 der Bausteinreihenfolge 5' GAAGTTCTCCATGAAG 3' ,- against the RNA of cdk2 with the sequence 5 'GAAGTTCTCCATGAAG 3',
- gegen die mRNA von cdk4 der Bausteinreihenfolge 5'- against the mRNA of cdk4 of the building block sequence 5 '
CTCACCATGTGACC 3' ,CTCACCATGTGACC 3 ',
- gegen die mRNA von cdk6 der Bausteinreihenfolge 5' CCGTCCTTCTCCATG 3' ,- against the mRNA of cdk6 of the building block sequence 5 'CCGTCCTTCTCCATG 3',
- gegen die mRNA von Cyclin Dl der Bausteinreihenfolge 5' AGGAGCTGGTCTTCCATG 3' ,- against the mRNA of cyclin Dl of the building block sequence 5 'AGGAGCTGGTCTTCCATG 3',
- gegen die mRNA von Cyclin D2 der Bausteinreihenfolge 5' TGGCACAGCAGCTCCATG 3' ,- against the mRNA of cyclin D2 of the building block sequence 5 'TGGCACAGCAGCTCCATG 3',
- gegen die mRNA von Cyclin D3 der Bausteinreihenfolge 5' AACACAGCAGCTCCATAC 3' und- against the mRNA of cyclin D3 with the order 5 'AACACAGCAGCTCCATAC 3' and
- gegen die mRNA von Cyclin E der Bausteinreihenfolge 5' CCGCTCCTTCGCATC 3' .- against the mRNA of cyclin E of the building block sequence 5 'CCGCTCCTTCGCATC 3'.
Eine weiter bevorzugte Ausführungsform der Erfindung besteht in der Kombination eines mit dem Tumorsuppressor Rb kooperierenden Tumorsuppressorgens, einer antisense- oder Ribozym-Sequenz gegen antagonistische Kinasen bzw. Cycline bzw. einer anderen die Phosphorylierung des Rb-Proteins hemmenden Substanz mit dem p53-Gen. Dadurch wird neben dem cytostatischen Effekt auch eine weitgehende Abtötung der TumorZeilen erreicht. Besonders bevorzugt ist die Kombination des koperierenden Tu orsuppressorgens MTS-1 (pl6)mit dem p53-Gen.A further preferred embodiment of the invention consists in the combination of a tumor suppressor gene cooperating with the tumor suppressor Rb, an antisense or ribozyme sequence against antagonistic kinases or cyclins or another substance which inhibits the phosphorylation of the Rb protein with the p53 gene. In addition to the cytostatic effect, this also largely kills the tumor cells. The combination of the cooperating is particularly preferred Do orsuppressorgens MTS-1 (pl6) with the p53 gene.
Die Erfindung soll nachfolgend durch Ausführungsbeispiele näher erläutert werden.The invention will be explained in more detail below by means of exemplary embodiments.
BeispieleExamples
1. Expression von antisense - RNA σeσen Cvclin Dl1. Expression of antisense - RNA σeσen Cvclin Dl
Die komplette cDNA des humanen Cyclin Dl-Gens wird in antisense-Orientierung hinter den CMV-Promoter in pX kloniert. Diese Reko binante wird in verschiedene Tumorzellinien transfiziert, und zwar zusammen mit dem Markergen CD20. Nach 48 Std. werden die Zellen durch Tryspinierung von den Kulturschalen abgelöst und im Fluoreszenz-aktivierten Zellsortierer nach 2 Parametern analysiert:The complete cDNA of the human cyclin Dl gene is cloned in antisense orientation behind the CMV promoter in pX. This recombinant is transfected into different tumor cell lines, together with the marker gene CD20. After 48 hours, the cells are detached from the culture dishes by tryspination and analyzed in the fluorescence-activated cell sorter according to 2 parameters:
1. Präsenz von CD20 (zeigt erfolgreich transfizierte Zellen an;1. Presence of CD20 (indicates successfully transfected cells;
2. DNA-Profil (Phasenverteilung).2. DNA profile (phase distribution).
Ein typisches Ergebnis ist in Tabelle 1 dargestellt:A typical result is shown in Table 1:
Tab. 1; KontrpllseKtpr antisense DlTab. 1; KontrpllseKtpr antisense Dl
ZeJ.lin.ie Ci s G2/M Gl sZeJ.lin.ie Ci s G2 / M Gl s
___M___M
SaOS-2 (Rb ) 51 31 18 52 32 16SaOS-2 (Rb) 51 31 18 52 32 16
BT549 (Rb ) 51 36 13 56 32 12BT549 (Rb) 51 36 13 56 32 12
U205 (RB ) 50 37 13 84 16 0 MCF-7 (Rb ) 58 29 13 92 8 0 SK-LMS-1 (Rb ) 56 30 14 82 18 0U205 (RB) 50 37 13 84 16 0 MCF-7 (Rb) 58 29 13 92 8 0 SK-LMS-1 (Rb) 56 30 14 82 18 0
Das Ergebnis zeigt eindeutig einen hemmenden Effekt der antisense-Dl-Konstruktion auf den Übergang der Zellen in die S-Phase, allerdings nur in Rb-positiven Zellen, was darauf hindeutet, daß Cyclin Dl die Präsenz von Rb benötigt, um seine stimmulierende Wirkung auf die Zellteilung auszuüben.The result clearly shows an inhibitory effect of the antisense Dl construction on the transition of the cells to the S phase, but only in Rb-positive cells, what is there suggests that cyclin Dl needs the presence of Rb to exert its stimulating effect on cell division.
2. Transfer des plβ-Gens in TumorZellen2. Transfer of the plβ gene into tumor cells
Die cDNA für pl6 wird hinter den CMV-Promoter in pX kloniert. Die resultierende Rekombinante wird in verschiedene Tumorzellinien zusammen mit dem CD20-Gen transfiziert. Nach 48 Std. werden die Zellen im FACS auf CD20-Expression selektiert und das DNA-Profil aufgenommen. Ein typisches Ergebnis ist in Abbildung 1 dargestellt. Das Ergebnis zeigt einen eindeutigen Hemmeffekt auf den Übergang in die S-Phase bei Rb-positiven Zellen unter Verwendung des normalen pl6-Gens. Ein als Kontrolle dienendes mutiertes pl6-Gen, das aus einer Tumorlinie isoliert wurde, hatte dagegen keinen Hemmeffekt.The cDNA for pl6 is cloned into pX behind the CMV promoter. The resulting recombinant is transfected into different tumor cell lines together with the CD20 gene. After 48 hours, the cells in the FACS are selected for CD20 expression and the DNA profile is recorded. A typical result is shown in Figure 1. The result shows a clear inhibitory effect on the transition to the S phase in Rb-positive cells using the normal pl6 gene. A mutant pl6 gene, which served as a control and was isolated from a tumor line, had no inhibitory effect.
3. Transfer des plβ-Gens durch einen Adenovirasrektor3. Transfer of the plβ gene through an adenovirus rector
Die cDNA des humanen plβ-Gens wird unter Kontrolle des CMV- Promoters in das Adenovirus-Transferplasmid p ElsplA klo¬ niert. Dieses Plasmid wird gemeinsam mit dem Helferplasmid pJM17 durch Ca**-Kopräzipitation in HEK 293-Zellen transfiziert. Durch homologe Rekombination zwischen beiden Plasmiden ent-stehende El-defiziente Viren werden Plaque- gereinigt und durch PCR-Amplifikation und Restriktaseverdau überprüft. Nach Vermehrung auf HEK 293-Zellen wird ein gereinigter Virusstock durch Auftrennung des Zelllysates im CsCl2-Gradienten gewonnen. Der Virusstock wird mittels Plaqueassay getitert. Für verschiedene Tumorzellinien wird die effektive Virusmenge/Zelle (MOI) durch Infektion mit einem ß- Galaktosidase-exprimierenden Adenovirus und histochemisehen Nachweis des Enzyms bestimmt.The cDNA of the human plβ gene is cloned into the adenovirus transfer plasmid p ElsplA under the control of the CMV promoter. This plasmid is transfected together with the helper plasmid pJM17 by Ca ** coprecipitation into HEK 293 cells. The homologous recombination between the two plasmids produces El-deficient viruses, plaque-cleaned and checked by PCR amplification and restriction digestion. After propagation on HEK 293 cells, a purified virus stock is obtained by separating the cell lysate in the CsCl 2 gradient. The virus stock is titered using a plaque assay. For various tumor cell lines, the effective amount of virus / cell (MOI) is determined by infection with an adenovirus expressing β-galactosidase and histochemical detection of the enzyme.
Die Tumorzellinien Hu H7, Lovo, MCF7 (pl6-) sowie HepG2, BT 549 und C33A (pl6+) werden mit Ad plβ bzw. Ad ßgal infiziert und plβ im Westernblot nachgewiesen. Die virusvermittelte plβ- Expression übersteigt das endogene Niveau in HepG2, BT 549 und C33A-Zellen mindestens 5fach. Die Expression von pl6 verhindert eine Anreicherung der phosphorylierten Form von Rb. (Abb. 2)The tumor cell lines Hu H7, Lovo, MCF7 (pl6-) as well as HepG2, BT 549 and C33A (pl6 +) are infected with Ad plβ or Ad ßgal and plβ is detected in a Western blot. Virus-mediated plβ expression exceeds the endogenous level in HepG2, BT 549 and C33A cells at least 5-fold. Expression of pl6 prevents accumulation of the phosphorylated form of Rb. (Fig. 2)
Die Infektion mit Ad plβ bewirkt in Zellen mit funktioneilen Rb einen Wachstumsstop, während die Infektion mit Ad Bgal nur zu einer Verlangsamung des Zellzyklus führt. Bei der Analyse des DNA-Profils im FACS ist in Rb positiven Zellen eine Hemmung beim Übergang in die S-Phase zu verzeichnen (Abb. 3). Infection with Ad plβ stops growth in cells with functional Rb, while infection with Ad Bgal only slows down the cell cycle. When analyzing the DNA profile in FACS, inhibition in the transition to the S phase was observed in Rb positive cells (Fig. 3).

Claims

Patentansprüche claims
1. Mittel zur Therapie von Tumoren und anderen Hyperplasien, gekennzeichnet dadurch, daß es ein mit dem Tumorsuppressor Rb kooperierendes Tumorsuppressorgen, eine antisense- oder Ribozym-Sequenz gegen antagonistische Kinasen bzw. Cycline oder eine andere die Phosphorylierung des Rb-Proteins hemmende Substanz enthält.1. Agent for the therapy of tumors and other hyperplasias, characterized in that it contains a tumor suppressor gene cooperating with the tumor suppressor Rb, an antisense or ribozyme sequence against antagonistic kinases or cyclins or another substance which inhibits the phosphorylation of the Rb protein.
2. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß das kooperierende Tumorsuppressorgen MTS-1 (plβ) ist.2. Composition according to claim 1, characterized in that the cooperating tumor suppressor gene is MTS-1 (plβ).
3. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß das kooperierende Tumorsuppressorgen MTS-2 (pl5) ist.3. Means according to claim 1, characterized in that the cooperating tumor suppressor gene is MTS-2 (pl5).
4. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß die antisense- oder Ribozym-Sequenz gegen die mRNA der Kinasen cdk2, cdk4, cdk5 oder cdkβ gerichtet ist.4. Composition according to claim 1, characterized in that the antisense or ribozyme sequence is directed against the mRNA of the kinases cdk2, cdk4, cdk5 or cdkβ.
5. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß die antisense- oder Ribozym-Sequenz gegen die mRNA der Cycline Dl, D2, D3 oder E gerichtet ist.5. Composition according to claim 1, characterized in that the antisense or ribozyme sequence is directed against the mRNA of the cyclins Dl, D2, D3 or E.
6. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die Promotoren der cdks oder Cycline gerichtet ist.6. Composition according to claim 1, characterized in that the antisense sequence is directed against the promoters of the cdks or cyclins.
7. Mittel nach Anspruch 1, dadurch gekennzeichnet, daß die phosphorylierungshem ende Substanz spezifisch die Kinasen cdk4 oder cdkβ hemmt.7. Composition according to claim 1, characterized in that the phosphorylierungshem ende substance specifically inhibits the kinases cdk4 or cdkβ.
8. Mittel nach Anspruch 1 und 2 bzw. 3, dadurch gekennzeichnet, daß die cDNA für plβ bzw. pl5 mit einem Promotor in einem geeigneten Vektor vorliegt. 8. Composition according to claim 1 and 2 or 3, characterized in that the cDNA for plβ or pl5 is present with a promoter in a suitable vector.
9. Mittel nach Anspruch 1 und 4 bzw. 5, dadurch gekennzeichnet, daß die antisense- oder Ribozymsequenz als DNA in einem Expressionsvektor vorliegt.9. Composition according to claim 1 and 4 or 5, characterized in that the antisense or ribozyme sequence is present as DNA in an expression vector.
10. Mittel nach Anspruch 1 und 4 bzw. 5, dadurch gekennzeichnet, daß die antisense- oder Ribozymsequenz synthetisch hergestellt und als Oligonukleotid eingesetzt wird.10. Composition according to claim 1 and 4 or 5, characterized in that the antisense or ribozyme sequence is synthetically produced and used as an oligonucleotide.
11. Mittel nach Anspruch 1, 4 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von cdk2 die Bausteinreihenfolge 5'GAAGTTCTCCATGAAG 3 ' aufweist.11. Composition according to claim 1, 4 and 10, characterized in that the antisense sequence against the mRNA of cdk2 has the building block sequence 5 ' GAAGTTCTCCATGAAG 3 ' .
12. Mittel nach Anspruch 1, 4 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von cdk4 die Bausteinreihenfolge 5 CTCACCATGTGACC 3' aufweist.12. Composition according to claim 1, 4 and 10, characterized in that the antisense sequence against the mRNA of cdk4 has the block sequence 5 CTCACCATGTGACC 3 ' .
13. Mittel nach Anspruch 1, 4 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von cdkβ die Bausteinreihenfolge 5'CCGTCCTTCTCCATG 3' aufweist.13. Composition according to claim 1, 4 and 10, characterized in that the antisense sequence against the mRNA of cdkβ has the building block sequence 5 ' CCGTCCTTCTCCATG 3 ' .
14. Mittel nach Anspruch 1, 5 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von Cyclin Dl die Bausteinreihenfolge 5 AGGAGCTGGTCTTCCATG 3' aufweist.14. Composition according to claim 1, 5 and 10, characterized in that the antisense sequence against the mRNA of cyclin Dl has the block sequence 5 AGGAGCTGGTCTTCCATG 3 ' .
15. Mittel nach Anspruch 1, 5 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von Cyclin D2 die Bausteinreihenfolge 5'TGGCACAGCAGCTCCATG 3' aufweist.15. Composition according to claim 1, 5 and 10, characterized in that the antisense sequence against the mRNA of cyclin D2 has the building block sequence 5 ' TGGCACAGCAGCTCCATG 3 ' .
16. Mittel nach Anspruch 1, 5 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von Cyclin D3 die Bausteinreihenfolge 5 AACACAGCAGCTCCATAC 3' aufweist.16. Composition according to claim 1, 5 and 10, characterized in that the antisense sequence against the mRNA of cyclin D3 has the building block sequence 5 AACACAGCAGCTCCATAC 3 ' .
17. Mittel nach Anspruch 1, 5 und 10, dadurch gekennzeichnet, daß die antisense-Sequenz gegen die mRNA von Cyclin E die Bausteinreihenfolge 5'CCGCTCCTTCGCATC 3' aufweist. 17. Composition according to claim 1, 5 and 10, characterized in that the antisense sequence against the mRNA of cyclin E has the building block sequence 5 ' CCGCTCCTTCGCATC 3 ' .
18. Mittel nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß es ein mit dem Tumorsuppressor Rb kooperierendes Tumor¬ suppressorgen, eine antisense- oder Ribozym-Sequenz gegen antagonistische Kinasen bzw. Cycline oder eine andere die Phosphorylierung des Rb-Proteins hemmende Substanz in Kombination mit dem p53-Gen enthält.18. A composition according to claim 1 to 7, characterized in that it is a tumor suppressor cooperating with the tumor suppressor Rb, an antisense or ribozyme sequence against antagonistic kinases or cyclins or another substance which inhibits the phosphorylation of the Rb protein in combination with the p53 gene.
19. Mittel nach Anspruch 1 und 18, dadurch gekennzeichnet, daß es das kooperierende Tumorsuppressorgen MTS-1 (pl6) in Kombination mit dem p53-Gen enthält. 19. Composition according to claim 1 and 18, characterized in that it contains the cooperating tumor suppressor gene MTS-1 (pl6) in combination with the p53 gene.
EP96903923A 1995-02-28 1996-02-26 Agent for treating tumours and other hyperplasia Withdrawn EP0812355A2 (en)

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