WO2006036004A1 - テロメライシン-gfp遺伝子含有組換えウイルス - Google Patents
テロメライシン-gfp遺伝子含有組換えウイルス Download PDFInfo
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Definitions
- the present invention relates to a reagent for cancer cell detection or cancer diagnosis and a cell death inducer.
- telomere activity In cancerous cells or immortalized cell lines, the frequency of telomerase activity is high, and it is a book other than germline cells, blood cells, epithelial cells, etc.
- telomere activity As an index (Shay JW, Zou Y, Hiyama Satoshi, Wright WE. Teiomerase and cancer. Hum Mol Genet 10 (7): 677-85, 2001).
- cancer cells can be killed by virus propagation (Kawashima T, Kagawa S, Kobayashi N, Shirakiya Y, Umeoka T, Teraishi F, Taki M, Kyo S, Tanaka N, Fujiwara T. Related Articles, Links Abstract Telomerase-specmc Clin Cancer Res 10): 285-92, 2004).
- the present invention is as follows.
- a replication cassette containing a human telomerase promoter, E1A gene, IRES sequence, and E1B gene in this order is incorporated into the E1 region of the viral genome, and the gene encoding the marker protein and the expression of the gene are restricted.
- a reagent for detecting cancer cells comprising a recombinant virus in which a labeling force set including a controllable promoter is incorporated into the E3 region of the viral genome.
- a replication cassette containing the human telomerase promoter, E1A gene, IRES sequence, and E1B gene in this order is incorporated into the E1 region of the viral genome, and the gene encoding the marker protein and the expression of the gene are restricted.
- a diagnostic reagent for cancer comprising a recombinant virus in which a labeling cassette containing a controllable promoter is incorporated into the E3 region of the viral genome.
- these reagents are used for detection and diagnosis in the body. Can be used for hemorrhoid or navigation surgery.
- human merase promoters include hTERT promoter and GFP as a labeled protein.
- the site megalovirus promoter statement can use the hTERT promoter.
- the virus include adenovirus.
- a cell death inducer comprising a recombinant virus in which a cell death induction cassette containing a promoter capable of controlling the expression of the gene is incorporated into the E3 region of the virus genome.
- the promoter of human telomerase may be the hTERT promoter.
- cell death induction-related proteins include immune-related proteins, apoptosis-inducing proteins, and telomerase-related proteins.
- PA28 can be exemplified as an immune-related protein
- TRAIL can be exemplified as an apoptosis-inducing protein
- AU5 can be exemplified as a telomerase-related protein.
- the promoter capable of controlling the expression of cell death induction-related protein may be a cytomegalovirus promoter or hTERT promoter, and the virus may be an adenovirus. Cancer cells can also be used as the cells of the present invention.
- a method for detecting a cancer cell comprising infecting a cancer cell with the reagent of (1) above and detecting fluorescence emitted from the cancer cell.
- a method for diagnosing cancer comprising infecting a cancer cell with the reagent of (2) above and detecting fluorescence emitted from the cancer cell.
- FIG. 1 is a diagram showing the structure of telomerisin-GFP.
- Figure 2 shows the growth of non-propagating viruses.
- Figure 3 shows the results of cancer cell detection by Ad-GFP co-infection in vitro.
- Figure 4 shows the results of detection of human cancer tissue by co-infection with Ad-GFP in inbipo.
- Fig. 5 is a diagram showing morphological changes caused by telomerisin-GFP infection in Shichizuki City cancer cells.
- FIG. 6 is a diagram showing GFP fluorescence expression by telomerisin-GFP infection in human moon cake cancer cells.
- Figure 7 shows telomerisin-GFP proliferation by quantitative real-time PCR.
- FIG. 8 is a graph showing GFP fluorescence expression by telomerisin-GFP infection in human colon cancer cells.
- Figure 9 shows telomerisin-GFP proliferation by quantitative real-time PCR.
- FIG. 10 shows morphological changes caused by telomerisin-GFP infection of normal human lung fibroblasts (NHLF).
- FIG. 11 is a diagram showing GFP light expression by telomerisin-GFP infection in normal human lung fibroblasts (NHLF).
- Figure 12 shows a comparison of telomelysin-GFP proliferation by quantitative real-time PCR.
- Fig. 13 is a diagram showing intratumor growth of telomerisin-GFP by fluorescence imaging.
- FIG. 14 is a diagram showing intratumor growth of telomerisin-GFP by fluorescence imaging. ⁇
- Fig. 15 is a diagram showing proliferation and replication within a lunar ulcer in a lymph node metastasis model of telomerisin-GFP by fluorescence imaging.
- Figure 16 shows an orthotopic rectal cancer model using nude mice and HT29 human colon cancer cells.
- FIG. 6 shows histological analysis at Dell.
- Fig. 17 shows the laparotomy findings in orthotopic rectal cancer model using nude mice and HT29 human colon cancer cells.
- Figure 18 shows intratumoral growth and replication of telomersin-GFP in HT29 rectal tumors and para-aortic lymph nodes by fluorescence imaging.
- Fig. 19 is a diagram showing intratumor growth of telomerisin-GFP in a para-aortic lymph node by fluorescence imaging.
- FIG. 20 is a diagram showing intratumor growth of telomerisin-GFP in a para-aortic lymph node by fluorescence imaging.
- a replication cassette containing a human telomerase promoter, E1A gene, IRES sequence and E1B gene in this river page is incorporated into the E1 region of the viral genome, and the gene encoding the marker protein and the gene
- a reagent for detecting cancer cells which contains a recombinant quill in which a label cassette containing a promoter capable of controlling expression is incorporated into the E3 region of the viral genome.
- the present invention also provides a method for detecting a cancer cell, comprising infecting a cancer mycelium with the reagent and detecting fluorescence emitted from the cancer cell.
- the “recombinant virus” refers to a virus in which a replication cassette and a labeling cassette described below are integrated into the genome.
- the virus to be used is not particularly limited, but adenovirus is preferred from the viewpoint of safety. Further, Among the adenoviruses, adenovirus type 5 in terms of convenience, such as the use is particularly preferred ⁇
- the thread recombination virus used in the present invention is one in which a replication cassette is incorporated in the region corresponding to the E1 region of the adenovirus genome and a labeling cassette is incorporated in the region corresponding to region 3 of the adenovirus genome.
- Duplicate cassette is The telomerase promoter, E1A gene, IRES sequence, and E1B gene are included in this order, and the telomerase promoter drives the E1A gene, IRES sequence, and E1B gene in a cancer cell-specific and telomerase-specific manner. Proliferation ⁇ Replicated.
- the label cassette contains a gene encoding a promoter and a label protein. For example, in the CMV (cytomegalovirus) promoter, a gene encoding a label protein is driven by the hTERT promoter (Fig. 1).
- telomerase promoter determines the transcription start site of telomerase and directly regulates its frequency. Telomerase is an enzyme that maintains telomere length by antagonizing the shortening of eukaryotic chromosomes during replication.
- the type of telomerase promoter is not particularly limited as long as it is suitable for the virus used for expression of the target gene, and is not particularly limited.
- the promoter of the photoenzyme (hTERT) is preferred. Many transcription factor binding sequences have been confirmed in the 1.4 kbp region upstream of hTERT f and its 5 'end, and this region is considered to be the hTERT promoter.
- the 181 bp sequence upstream of the translation start site Is an important core region for downstream gene expression.
- any core region can be used as long as it contains this core region.
- This gene sequence of about 378 bp has been confirmed to have the same gene expression efficiency as the 181 bp core region alone.
- the nucleotide sequence of hTERT promoter having a length of 455 bp is shown in SEQ ID NO: 1.
- the hTERT promoter is a nucleotide that hybridizes under stringent conditions with DNA consisting of a nucleotide sequence complementary to the DNA consisting of SEQ ID NO: 1, and has hTERT promoter activity.
- a base sequence is also included.
- Such nucleotides are known hybridizations such as colony hybridization, plaque hybridization, Southern mouthpiece, etc. using the polynucleotide consisting of the nucleotide sequence represented by SEQ ID NO: 1 or a fragment thereof as a probe.
- CDNA library Single and genomic libraries. Refer to “Molecular Cloning, A Laboratory Manual 2nd ed.” (Cold Spring Harbor Press (1989)) for the method of preparing a cDNA library. You can also use commercially available cDNA libraries and genomic libraries.
- Examples of stringent conditions in the above hybridization include 1 X SSC to 2 X SSC, 0.1% to 0.5% SE> S, and 42 ° C to 68 ° C. For example, after prehybridization at 60 to 68 ° C for 30 minutes or more, wash in 2 X SSC, 0.1% SDS for 5 to 15 minutes at room temperature 4 to 6 times. .
- the E1A gene, the IRES sequence and the E1B gene are included in this order because the virus infects the host cell when the IRES sequence is inserted between the E1A gene and the E1B gene. This is because the proliferation ability is increased.
- the E1A gene and the E1B gene are genes included in the E1 gene.
- the E1 gene is one of the early genes (early: E) and late genes (late: L) that are involved in DNA replication. It encodes a protein involved in the regulation of transcription of the viral genome.
- the E1A protein encoded by the E1A gene activates the transcription of a group of genes (E1B, E2, E4, etc.) necessary for infectious virus production.
- the E1B protein encoded by the E1B gene promotes viral replication by helping to accumulate in the cytoplasm of the infected host cell, and by inhibiting the host cell protein synthesis. To do.
- the nucleotide sequences of the E1A gene and E1B gene are shown in SEQ ID NO: 2 and SEQ ID NO: 3, respectively.
- E1A and E1B hybridize under stringent conditions with DNA consisting of a base sequence complementary to the DNA consisting of SEQ ID NO: 2 and SEQ ID NO: 3 in addition to the base sequences shown in SEQ ID NO: 2 and SEQ ID NO: 3, respectively. Also included are base sequences that encode proteins that are soy and each have E1A and E1B activities.
- Such a nucleotide sequence is obtained by using a polynucleotide consisting of the nucleotide sequences represented by SEQ ID NO: 2 and SEQ ID NO: 3, or a fragment thereof as a probe, colony hybridization, plaque hybridization, Saza ' by known hybridization sheet 3 down method such as blot, for the manufacturing method of the cDNA library
- First and O cDNA libraries can be obtained from Genomurai Burari, "Molecular Cloning, a Laboratory Manual 2nd ed.J (Cold. Spring Harbor Press (1989) can also be referred to.
- Commercially available cDNA libraries and genomic libraries may also be used.
- Stringent conditions in the above hybridization include, for example, 1 X SSC to 2 X SSC.
- IRESdnternal Ribosome Entry Site is a protein synthesis initiation signal specific to the Picornaviridae family, and is thought to play a role as a liposome binding site because of its complementary sequence to the 3 'end of 18S liposomal RNA. ing. It is known that mRNA derived from the virus of the Picornaviridae family is translated via this sequence. Translation is highly effective from the IRES sequence, and protein synthesis is performed even in the middle of mRNA independent of the cap structure. Therefore, in this virus, both the E1A gene and the E1B gene downstream of the IRES sequence are independently translated from the promoter of human telomerase.
- telomerase promoter expression control extends independently to the E1A gene and E1B gene. Therefore, compared to the case where either the E1A gene or the E1B gene is controlled by the telomerase promoter, It can be limited to cells having telomerase activity strictly.
- the IRES sequence is shown in SEQ ID NO: 4.
- IRES is also included in a base sequence that hybridizes to a DNA consisting of a complementary base sequence to the DNA under stringent conditions and encodes a protein having IRES activity.
- a base sequence is a known high sequence such as colony hybridization, 'plaque hybridization, Southern blot, etc., using a polynucleotide comprising the nucleotide sequence LI represented by SEQ ID NO: 4 or a fragment thereof as a probe.
- Hybridization can be obtained from cDNA libraries and genomic libraries.
- I Molecular Cloning A Laboratory Manual 2nd ed.
- the promoter of human telomerase is located upstream of the E1 gene. This is because it can promote proliferation in cells having telomerase activity.
- the gene contained in the replication cassette of the present invention can be obtained by ordinary genetic engineering techniques. For example, a nucleic acid synthesis method using a DNA synthesizer generally used as a genetic engineering technique can be used. In addition, after isolating or synthesizing the ⁇ -type gene sequence, a primer specific to each gene is designed, and the PCR is used to amplify the gene sequence (Current Protocols in Molecular Biology, John Wiley & Sons (1987) Section 6.1-6.4) or gene amplification methods using cloning vectors can be used! The method, Moleculer cloning 2 nd Edt. Cold accordance Spring Harbor Laboratory Press (1989) or the like, be readily performed by those skilled in the art it can.
- a known method can be used for purification of the obtained PCR product.
- a method using ethimubu mouth amide, a method using SYBR Greenl (Molecular probes), a method using agarose gel by GENECLEAN (Funakoshi), QIAGEN (QIAGEN), a method using DEAE-cellulose filter paper, a freeze & squeeze method There is a method using a dialysis tube.
- agarose gel perform electrophoresis on agarose gel and excise the DNA fragment from the agarose gel for purification. If necessary, it can be confirmed that the expected gene is obtained by a conventional sequencing method.
- each of the above genes is cleaved with a known restriction enzyme or the like, and the cleaved DNA fragment of the gene is inserted into a known vector according to a known method and ligated.
- Known vectors include encephalomyocarditis virus (ECMV) IRES (ribosome-binding site inside mRNA), which can translate two open reading frames (ORFs) from one type of mRNA.
- ECMV encephalomyocarditis virus
- IRES ribosome-binding site inside mRNA
- coli-derived plasmids pCR4, pCR2, pCR2.1, pBR322, pBR325, pUC12, pUC13, etc.
- Bacillus subtilis plasmids pUB110, pTP5, pC194, etc.
- yeast-derived plasmids PSH19, pSH15, etc.
- ⁇ phage butteriophages, retroviruses, vaccinia viruses, baculoviruses, and other animal viruses, pAl-ll, XTl, pRc / CMV, pRc / RSV, pcDNAI / Neo, etc.
- E1A-S RT-PCR and / or DNA-PCR from cells expressing E1 gene, such as 293 cells
- appropriate primers such as E1A-S, El A-AS, E1B-S, E1B-AS Amplify the E1A gene and E1B gene by, confirm the sequence using a known method such as TA cloning, if necessary, and then cut out the E1A and E1B DNA fragments using a known restriction enzyme.
- the replication cassette consisting of hTERT-ElA-IRES- ⁇ used in the present invention is arranged in the order of “hTERT promoter arrangement
- each gene can be prepared by inserting using a multicloning site or the like.
- the cytomegalovirus (CMV) promoter contained in a known vector such as p Shuttle is removed with a known restriction enzyme, and an appropriate restriction enzyme is removed from that site from phTERT-ElA-IRES-ElB. It is possible to insert the sequence cut out by using.
- CMV cytomegalovirus
- the adenovirus incorporating only the replication cassette consisting of hTERT-ElA-IRES-E1B used in the present invention is called “telomerisin” or “Telomelysin J.
- Adenovirus growth under the control of the hTERT promoter The virus can be propagated specifically for cancer cells by expressing the E1 gene required for the recombinant virus used as a reagent of the present invention includes a labeling cassette as well as a replication cassette.
- the “label cassette” is, for example, incorporated into the E3 region in adenovirus.
- the original function of virus vector which is a recombinant virus used in the present invention
- the time when the cell damage occurs is as late as possible. The reason is that when cells are disrupted, the fluorescence expression generated by the propagation of the recombinant virus of the present invention disappears, and it is difficult to identify the site of the presence.
- E3A and E3B exist in the adenovirus E3 region
- the 11.6 kDa ADP (adenovirus death protein) in the E3A region has a function of promoting cell damage and virus spread.
- the recombinant virus used in the present invention can control the timing of cell death by removing the viral genomic region that encodes a protein having a function of promoting cell damage and viral spread, such as the E3 region containing ADP. Delaying and facilitating identification of cancer tissue by fluorescent expression of GFP and the like.
- the labeling protein constituting the labeling cassette is a protein that is visualized by luminescence in the cell in which the virus has grown, and preferably a fluorescent substance is used. Examples of such substances are green fluorescent protein (GFP) derived from luminescent jellyfish such as Aequorea victorea, and a modified variant (GFP variant). Examples include EGFP (Enhanced-humanized GFP) or rsGFP (red-shift GFP). It is also possible to use GFP derived from yellow fluorescent protein (YFP), cyan fluorescent protein (CFP), blue fluorescent protein (BFP), and Renilla reniformis. It is possible, and genes encoding them can be used in the present invention.
- the promoter capable of controlling the expression of the gene may be any promoter as long as it can cope with the virus used for the expression of the target gene. Examples include, but are not limited to, cytomegalovirus (CMV) promoter, hTERT promoter, SV40 late promoter, MMTV LTR promoter, RSV LTR promoter, SRa promoter, and the like.
- CMV cytomegalovirus
- hTERT SV40 late promoter
- MMTV LTR promoter MMTV LTR promoter
- RSV LTR promoter SRa promoter
- CMV promoter or hTERT promoter can be used.
- the recombinant gene contained in the label cassette of the present invention can be obtained by ordinary genetic engineering techniques.
- a nucleic acid synthesis method using a DNA synthesizer generally used as a genetic engineering technique can be used.
- Gene amplification using a PCR method (Current Protocols m Molecular Biology, dohn ⁇ ie & Sons (1987) Section 6.1-6.4) or cloning vectors that design specific primers and amplify their gene sequences using a PCR device can be used.
- the method Moleculer cloning 2 nd Edt.
- a known method can be used for purification of the obtained PCR product.
- a method using ethimubu mouth mouth a method using SYBR Greenl (Molecular probes)
- QIAGEN QIAGEN
- DEAE-cellulose filter paper a freeze & squeeze method
- a method using a dialysis tube There is a method using a dialysis tube.
- agarose gel perform electrophoresis on agarose gel and excise the DNA fragment from the agarose gel for purification. If necessary, it can be confirmed that the expected gene is obtained by a conventional sequencing method.
- the gene obtained as described above is cleaved with a known restriction enzyme or the like, and the cleaved DNA fragment of the gene is driven upstream of the gene fragment encoding the labeled protein.
- the recombinant gene is designed so that the gene fragment encoding the above promoter is arranged.
- shuttle plasmid pHMll can be used as the plasmid.
- both genes are ligated using DNA ligase, inserted into a vector, and a marker cassette recombination gene is prepared.
- Known vectors include pSlmttle vectors, plasmids derived from E. coli (such as pCR4 pCR2, pCR2, l, pBR322, pBR325, pUC12, and pUC13), plasmids derived from Bacillus subtilis (such as pUB110, pTP5, and pC194), and yeast-derived plasmids.
- Bacteriophages such as violet (pSH19, pSH15, etc.), ⁇ phages, animal winoles such as retrovirus, vaccinia winoles and baculoinores PAl-ll, pXTl, pRc / CMV, pRc / RSV, pcDNAI / Neo, etc. are used.
- the recombinant gene containing the replication cassette and the labeling cassette is excised using an appropriate restriction enzyme and inserted into an appropriate virus expression vector, whereby a recombinant virus can be produced.
- viral expression vectors include adenovirus, retrovirus, vaccinia virus, baculoinoles, etc.
- adenovirus particularly type 5 adenovirus, is preferred.
- the electroboration method, the ribosome method, the spheroplast method, the lithium acetate method and the like can be used.
- CMV_EGFP-SV40P (A) derived from pEGFP-Nl (CLONTECH) was inserted into shuttle plasmid pHMll, and the Csp45I fragment of this plasmid was incorporated into phTERT-ElA-IRES- ⁇ .
- pShuttle vector can be obtained by inserting into one Clal site.
- a necessary part of the sequence is cut out from the recombinant gene prepared as described above using a known restriction enzyme, and a commercially available kit such as Adeno-X Expression System (CLONTECH) is used.
- -X It can be inserted into viral DNA such as Viral DNA (the obtained one is labeled “AdenoX-hAIB”).
- the types of cancer cells to be detected in the present invention are not limited, and all types of cancer cells can be used.
- solid cancer in head and neck, stomach, large intestine, lung, liver, prostate, knee, esophagus, bladder, gallbladder / bile duct, breast, uterus, thyroid, ovary, etc. or leukemia, lymphoma, sarcoma, mesenchymal tumor, etc. It is valid.
- Most cancer cells derived from human tissues show an increase in telomerase activity, and the present invention is active in proliferation due to such telomerase activity. It is possible to detect cancer cells in general.
- telomerase expression is extremely high in cancer cells compared to normal cells
- hTERT is expressed in cancer cells containing telomerase and the replication cassette functions.
- the virus proliferates, and the replication of the labeled protein also increases due to the proliferation, so that the labeled protein is expressed and visualized.
- the reagent of the present invention does not develop fluorescence in normal cells, cancer cells containing the reagent of the present invention emit light, and the cancer cells can be visually observed.
- a culture plate containing an appropriate culture medium and cultured at 37 ° C in the presence of carbon dioxide.
- DMEM, MEM, RPMI-1640 or the like generally used for animal cell culture is adopted, and serum, antibiotics, vitamins and the like can be added as necessary.
- the cultured cells are infected by inoculating a certain amount of the virus, for example, 0.:! To 10 MOI (multiplicity of infection), preferably 1 MOI.
- MOI is the ratio between the amount of virus (infectious unit) and the number of cells when a certain amount of cultured cells are infected with a certain amount of virus particles, and is used as an indicator when cells are infected with viruses.
- cells with virus growth emit a predetermined fluorescence (for example, green fluorescence in the case of GFP) when irradiated with excitation light, so that cancer cells can be visualized.
- a predetermined fluorescence for example, green fluorescence in the case of GFP
- GFP fluorescence expression is seen in the cell.
- the GFP fluorescence expression can be observed over time using a CCD camera.
- the recombinant virus of the present invention may be administered in vivo.
- the reagent of the present invention can be applied to the affected area as it is, or any known method such as injection, inhalation from the nasal cavity, oral cavity or lung, oral administration, catheter, etc. It can also be introduced into a living body (target cell or organ) by intravascular administration or the like.
- the dosage is freely selected depending on the type of active ingredient, administration route, administration subject, patient age, body weight, sex, symptom, and other conditions.
- the amount of the dose should be about 10 6 to:! OuPFlKplaque forming units), preferably about 10 9 to lOnP U, and can be administered once a day or divided into several times.
- SN sentinel nodes
- the system for diagnosing in vivo cancer using the reagent of the present invention is a technique for directly expressing a fluorescent protein in a cancer capsule and identifying a tumor tissue or a metastasis-positive lymph node by a highly sensitive intraoperative fluorescence detection system,
- the technology of “navigation surgery” can be established.
- the recombinant virus of the present invention can proliferate and, for example, can emit strong green fluorescence of GFP.
- the in-vivo cancer diagnosis system using the reagent of the present invention directly identifies a tumor tissue or a metastasis-positive lymph node in real time during the operation, and provides navigation for the resection range. It is extremely practical for proceeding with surgery more smoothly.
- the reagent of the present invention was endoscopically observed several days before surgery (for example, stomach, colon mucosa, stomach cancer, colon around stomach cancer and colon cancer). Cancer, lung cancer, inside of tumor such as knee cancer, etc.), tumor infiltrating tissue, tumor metastasis tissue, or lymph nodes of the lymph nodes are distributed, and the virus at the tumor site or metastasis positive site grows Allow enough time.
- the surgical field is projected from the GFP fluorescence excitation light source after laparotomy, and the image from the special 3CCD camera is projected onto the face-mount display.
- the transmission lens By using a transmission lens, the field of view of the actual surgical field can be secured, and metastasis-positive lymph nodes can be detected by overlapping GFP images.
- a special filter By attaching a special filter, it is possible to visually observe the fluorescence without using a camera.
- the reagent of the present invention can also be applied as an in vitro diagnostic agent for screening purposes.
- quantification of tumor markers is the most common method of determining the presence of cancers that cannot be detected macroscopically or whose primary focus cannot be identified.
- tumor markers are not always satisfactory in their cancer-specific life, and it is extremely difficult to search for all cancer types using a single marker.
- Telomerase has been confirmed to increase in activity in more than 85% of human malignant tumors, and its cancer specificity is considered extremely high.
- In vitro cancer diagnosis using the reagent of the present invention can be performed, for example, as follows. Red blood cells are removed from whole blood collected from a subject, and a certain ratio (0.1 to 10 MOI, preferably 1 kg) of the reagent of the present invention is mixed in a test tube with other cell suspensions. Let stand for a certain period of time (for example, 12 to 48 hours) to promote infection and growth of virus in cancer cells, and quantitatively analyze GFP expression in the cell fraction by flow cytometry. Using this system, it becomes possible to detect free cancer cells present in peripheral blood with high sensitivity. This method can be used to detect free cancer cells that are present only in trace amounts in peripheral blood.
- the present invention relates to a gene encoding a cell death-inducing protein, wherein a replication cassette containing a human telomerase promoter, an E1A gene, an IRES sequence, and an E1B gene in this order is incorporated into the E1 region of the viral genome.
- a cell death-inducing agent comprising a recombinant virus in which a cell death-inducing cassette containing a promoter capable of controlling the expression of a child is incorporated into the E3 region of the viral genome is provided.
- it can be used as an agent for inducing cell death of cancer crescent capsule for cancer gene therapy, prevention of recurrence after surgery, prevention of metastasis and Z or prevention.
- a gene encoding a protein capable of inducing cell death driven by a promoter is incorporated.
- the cell death-inducing cassette used for this recombinant virus includes a gene encoding a cell death-inducing protein and a promoter that can control the expression of the gene. Therefore, for example, when the inducer of the present invention is introduced into a cancer cell, the virus grows specifically in the cancer cell, resulting in an increase in the intracellular expression level of the cell death-inducing protein, and without damaging other normal cells. Can only induce cell death.
- the gene encoding a cell death induction-related protein refers to a gene encoding a protein related to the induction of cell death in a specific cell.
- cell death induction-related proteins examples include the following, and in the present invention, genes encoding these proteins can be incorporated.
- PA28 is mentioned as an immune-related protein.
- PA28 is a protein that activates the proteasome in the cell, and induces an immune response and induces cell death by overexpression.
- TRAIL is mentioned as an apoptosis-inducing protein.
- TRAIL refers to a molecule that induces apoptotic cell death by binding to cell surface receptors.
- telomerase-related protein is AU5.
- AU5 has a sequence that can induce cell death in cells with telomerase activity.
- the genes of these cell death induction-related proteins can be obtained by ordinary genetic engineering techniques. For example, a nucleic acid synthesis method using a DNA synthesizer generally used as a genetic engineering technique can be used. In addition, after isolating or synthesizing a gene sequence that is a cage, a primer specific to each gene is designed, and the PCR is used to amplify the gene sequence using PCR (Current Protocols in Molecular Biology, John Wiley & Sons (1987) Section 6.1-6.4) or gene amplification methods using cloning vectors can be used. The method, Moleculer cloning 2 nd Edt. Cold Spring Harbor Laboratory Press (1989) , etc. [follow this can be force S easily performed by those skilled in the art.
- Cancer suppression The gene has a function of suppressing the growth of cancer cells.
- cancer suppressor genes include the following which are used in conventional gene therapy.
- pl5 SEQ ID NO: 12; Accession No. L36844: Various types of cancer
- pl6 SEQ ID NO: 1 3; Accession No ⁇ 27211: Various cancers
- APC ' (SEQ ID NO: 14; Accession No. M74088): Colorectal cancer, stomach cancer, pancreatic cancer BRCA-1 (SEQ ID NO: 15; Accession No. U14680): Ovarian cancer, breast cancer
- DPC-4 (SEQ ID NO: 16; Accession No. U44378): colon cancer, pancreatic cancer FHIT (SEQ ID NO: 17; Accession No. NM 112012): gastric cancer, lung cancer, eclampsia cancer p73 (SEQ ID NO: 18; Accession No. Y11416): Neuroblast cell type
- PATCHED SEQ ID NO: 19; Accession No. U59464: Basal cell carcinoma
- Rb p 110 (SEQ ID NO: 20; Accession No. M15400): Lung cancer, bone and meat species
- NF1 SEQ ID NO: 2 2; Accession No.NM 000267
- Neurofibromatosis type 1 NF2 SEQ ID NO: 2 3; Accession No ⁇ 11353
- WT-1 (SEQ ID NO: 24; Accession No. NM 000378): Wilms tumor
- a nucleic acid synthesis method using a DNA synthesis apparatus generally used as a genetic engineering technique can be used.
- the promoter capable of controlling the expression of the gene may be any suitable promoter that can cope with the virus used for the expression of the target gene.
- CMV promoter or fTER hTERT promoter Preferably use CMV promoter or fTER hTERT promoter
- the present invention is not limited thereto, and for example, SV40 late promoter, MMTV LTR promoter, RSV LTR promoter, SR promoter, etc. can be used.
- Cell death-inducing agent of the present invention it is to be 1 be applied to the affected area, roughness loose known methods, for example, intravenous, intramuscular, intraperitoneal or subcutaneous like O injection, or nasal, inhalation from the oral cavity or lung, oral It can be introduced into a living body (target cell or organ) by administration, intravascular administration using a catheter, or the like.
- a known pharmaceutically acceptable carrier such as an excipient, a bulking agent, a binder, a lubricant, a known additive (buffer, isotonic) Agent, chelating agent, coloring agent, preservative, fragrance, flavoring agent, sweetening agent, etc.
- the cell death inducer of the present invention is an oral administration agent such as tablets, capsules, powders, condyles, pills, pills, solutions, syrups, etc., injections, external preparations, suppositories, eye drops, etc. It can be administered orally or parenterally depending on the form. Preferable examples include local injection into muscle, abdominal cavity and the like, and injection into vein.
- the dosage is appropriately selected according to the type of active ingredient, administration route, administration subject, patient age, weight, sex, symptom, and other conditions, but the daily dose of the virus of the present invention, which is usually an effective ingredient 10 6 ⁇ : LO u PFU (pla (iue forming units) or so, preferably 10 9 to 10 UPFU, and can be given once or once, and divided into several times. You can also.
- LO u PFU plaque (iue forming units) or so, preferably 10 9 to 10 UPFU
- the virus of the present invention when using the virus of the present invention, by using a known immunosuppressive agent J or the like, the immunity of the living body can be suppressed and the virus can be easily infected. Furthermore, the virus of the present invention may be used in combination with at least one anticancer agent selected from the group consisting of known anticancer agents and radiation. Anti-cancer IJs include, but are not limited to:
- Alkylation activator This preparation has the effect of introducing an alkyl group into the nucleic acid protein of cancer cells to cause cell damage.
- Carbocon Busu / Lefan (Mustard drug)
- -Mustine nitrosourea
- Antimetabolite active agent This preparation has an action of antagonizing an enzyme in the metabolic process and inhibiting cell synthesis.
- methotrexate folic acid type
- mercaptopurine ' (purine type)
- Cytarabine pyrimidine
- fluorouracil tegafur, carmofur and the like.
- Antibiotics Actinomycin D, bleomycin, adriamycin, mitomycin C, etc., which have an antidepressant action.
- Microtubule inhibitor active agent This preparation acts on microtubules and exhibits an antitumor effect. For example, docetaxel, paclitaxel (taxane), vinorelbine, pink listin, vinblastine (alkaloid) Etc. ⁇
- Platinum preparation This preparation has an action of inhibiting DNA synthesis by constituting intra-DNA chain or inter-chain bond or DNA protein bond, such as cisplatin, alpoplatin, nedaplatin, etc. Can be given.
- Topoisomerase inhibitor activators Topoisomerase inhibitor, irinotecan (topoisomerase I inhibitor), podophyllotoxin derivative (topoisomerase II inhibitor) and the like.
- Topoisomerase is an enzyme that catalyzes a reaction that temporarily cuts DNA and changes the linking number of the DNA strand.
- the cell death inducer of the present invention is considered to be an extremely safe preparation because it is considered that the possibility of side effects is extremely low for the following reasons.
- Normal somatic cells have almost no telomerase activity, and floating cells such as hematopoietic cells are less susceptible to infection with the virus of the present invention.
- the virus of the present invention Since the virus of the present invention has a proliferative ability, it can be used at a lower concentration than a non-proliferative virus used in normal gene therapy.
- Cell death can be induced in the target cells by infecting the recombinant virus of the present invention in the target cells.
- the type of target cell is particularly limited For example, tumor cells, actively proliferating cells, and cells with increased telomerase activity can be mentioned.
- morphological observation can be performed by the following method. That is, when the cells adhering to the bottom surface of the culture vessel are infected with the recombinant virus of the present invention after a certain period of time, the cells are rounded under an inverted microscope and peeled off from the bottom surface as glossy cells in the culture solution. To float. At this point, the cell has failed in the mechanism that maintains its life, and it can be determined that cell death has been induced. Cell death can also be confirmed with a commercially available live cell assembly kit using tetrazolium salt (MTT, XTT, etc.).
- MTT tetrazolium salt
- This example shows in vitro fluorescence when co-infected with the virus “Telomelysin” containing a replicating cassette and the non-proliferating virus “Ad_GFP” containing a labeled cassette. This is a preliminary examination.
- Human colon cancer cell SW620, human lung cancer cell A549, and H1299 were infected with 0.1 MOI (multiplicity of infection) Ad-GFP (Fig. 2).
- Ad-GFP and 8 x 10 6 PFU TRAD were intratumorally administered to human colon cancer SW620 and human lung cancer A549 tumor transplanted subcutaneously in the back of nude mice, and fluorescence was observed over time did.
- a single virus contains a replication cassette containing the telomerase promoter and the E1 gene and a labeling cassette containing the gene encoding the GFP protein.
- Figure 1 shows an overview of telomerisin-GF.
- Telomerein-GFP is driven by the hTERT promoter and is driven by E1A / IRES / E1B, and is proliferated and replicated specifically in cancer cells and telomerase. Is incorporated. Therefore, cells with virus growth emit green fluorescence by excitation light, and cancer cells can be visualized.
- Such a non-proliferating virus was prepared as follows. 2. Production of recombinant virus.
- RT-PCR was performed from RNA extracted from 293 cells using the following specific primers (E1A-S, E1A-AS) and PCR conditions to amplify the 897 bp E1A gene.
- E1A-S 5'-AC A CCG GGA CTG AAA ATG AG-3 '(SEQ ID NO: 5)
- DNA-PCR was performed from DNA extracted from 293 cells using the following primers (E1B-S, E1B-AS) to amplify the 1822 bp E1B gene.
- E1B-S 5'-CTG ACC TCATGG AGG CTT GG-3 '(SEQ ID NO: 7)
- E1B-AS 5, -GCC CAC ACA TTT CAG TAG CTC-3 '(SEQ ID NO: 8)
- the PCR solution composition and reaction conditions were the same as for the E1A gene.
- O TA cloning of each PCR product (TA Cloning kit dual Promoter; Invitrogen) was performed, the sequence was confirmed, and the restriction enzyme EcoRI The DNA fragments of 911 bp (El A) and 1836 bp (EIB), respectively, were excised.
- E1A was inserted into the Mlul cleavage site of the pIRES vector (CLONTECH) and E1B was inserted into the Sail site in the forward direction (E1A-IRES I-E1B).
- cytomegalovirus (CMV) promoter contained in the pSliuttle vector was removed by treatment with the restriction enzymes Mfel and Nhel, and a 3828 bp sequence excised from the phTERT-E1A-IRES-E1B with the restriction enzymes Nhel and Notl. (PSh-hAIB).
- pEGFP-Nl (CLONTECH) was cut with Agel / Nhel, blunted with Klenow fragment, and self-ligated (pEGFP-N2).
- This pEGFP-N2 was cleaved with Nsil / Aflll, blunted with T4 DNA polymerase, and a Bglll site was prepared using a Bglll linker. This Bglll fragment was inserted into the BamHI site of pHMll (pHMll_EGFP-N2).
- telomerisin-GFP infectious recombinant adenovirus
- Non-small cell lung cancer-derived H1299 cells cultured in vitro were infected with telomersin-GFP at 1 MOI and 10 MOI. Specifically, 5 ⁇ 10 4 H1299 cells were seeded on a 24 well plate, and the virus was added to the culture solution at a concentration of 1 MOI or 10 MOI after 24 hours. Thereafter, the cell morphology was observed over time under an inverted microscope to examine the cytotoxic activity of the virus.
- telomerisin-GFP growth was observed under a fluorescence microscope. Also on concentration dependence PT / JP2005 / 018401 GFP green fluorescence indicating virus growth in a time-dependent manner was observed (Fig. 6). GFP expression was observed in the most cells 72 hours after 10MOI infection, and the number of GFP positive cells decreased with the induction of cell death (Fig. 6). 3. Verification of telomerisin-GFP growth by quantitative real-time PCR
- H1299 human lung cancer cells were infected with telomerisin-GFP at 10 MOI, and after 2 hours. After 26, 50, and 74 hours, cells were collected and DNA was extracted. Real-time PCR was performed using primers that target the E1A gene of telomerisin-GFP, and virus growth and replication were quantitatively analyzed.
- the primer and PCR conditions used were as follows.
- E1A-S 5'-CCT GTG TCT AGA GAA TGC AA-3 '(SEQ ID NO: 9)
- E1A-AS 5'-AC A GCT CAA GTC CAA AGG TT-3, (SEQ ID NO: 10) PCR solution composition: 1 X LC FastStart DNA Master SYBR Green I
- telomerisin-GFP had already proliferated 1 million times after 26 hours (Fig. 7), and then reached a plateau, but it was shown that GFP fluorescence increased slightly later. (Fig. 7).
- telomerisin-GFP infection SW62 cells derived from human colon cancer were infected with telomerisin-GFP at 10 MOI, and changes over time were observed under an inverted microscope and a fluorescence microscope.
- SW620 human colon cancer cells were infected with telomericin-GFP at 10 MOI, and after 2 hours, cells were collected 26, 50, 74, and 98 hours, DNA was extracted, and virus propagation was performed in real-time PCR. Quantitative analysis. Real-time PCR conditions (reaction solution composition, cycle, time, etc.) are the same as for H1299 cells.
- telomerisin-GFP proliferated 1 million times after 26 hours and remained almost plateau until 98 hours (Fig. 9).
- NHLF normal human lung fibroblasts
- telomerisin-GFP hardly proliferated and replicated in normal cells (Fig. 11).
- telomerisin-GFP proliferated approximately 1 million times after 24 hours, and GFP fluorescence was pronounced after 72 hours, whereas NH F was approximately 1000 times even after 72 hours. GFP fluorescence was hardly detected (Fig. 12).
- Example 7 Intratumoral growth of telomerisin-GFP-detection of replication by fluorescence imaging
- telomericin-GFP 10 7 PFU of telomericin-GFP was administered into H1299 human lung cancer tumors transplanted into nude mice, and GFP fluorescence expression was observed over time with a CCD camera. As a result, GFP fluorescence expression by telomerisin-GFP proliferation was recognized and confirmed within 24 hours, and the range and brightness were enhanced after 3 days and 5 days (FIG. 13). 2. In the same manner as described above, 107: PFU telomerisin-GFP was administered into H1299 human lung cancer tumors transplanted to nude mice, and subcutaneous tumors were removed 1 week later and 3 weeks later. The CCD camera was used to observe the expression of GFP fluorescence on the entire surface of the tumor.
- HT29 human colon cancer cells were transplanted into the rectal wall of a nude mouse, and when a gross tumor was formed, the tumor was removed and prayed with hematoxylin eosin (HE) staining.
- HE hematoxylin eosin
- a tumor was formed around the rectum, and a tumor cell mass was also confirmed in the lymphatic vessel in the rectal wall (Fig. 16).
- Fluorescence imaging with a CCD camera showed GFP fluorescence in the transplanted HT29 rectal tumor and in one of the three para-aortic lymph nodes (Figure 18).
- a reagent for detecting cancer cells or a reagent for diagnosing cancer and a cell death inducer are provided. Since the reagent of the present invention can detect cancer cells with extremely high sensitivity even in vivo, it is useful for gradual navigation surgery and the like. Sequence listing free text
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Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ554799A NZ554799A (en) | 2004-09-29 | 2005-09-28 | Telomelysin-GFP gene-containing recombinant virus |
AT05790164T ATE520420T1 (de) | 2004-09-29 | 2005-09-28 | Das telomelysin-gfp-gen enthaltendes rekombinantes virus |
AU2005288034A AU2005288034A1 (en) | 2004-09-29 | 2005-09-28 | Telomelysin-GFP gene-containing recombinant virus |
CA002581969A CA2581969A1 (en) | 2004-09-29 | 2005-09-28 | Telomelysin-gfp gene-containing recombinant virus |
JP2006537857A JP5006045B2 (ja) | 2004-09-29 | 2005-09-28 | テロメライシン−gfp遺伝子含有組換えウイルス |
EP05790164A EP1795604B1 (en) | 2004-09-29 | 2005-09-28 | Telomelysin-gfp gene-containing recombinant virus |
MX2007002999A MX2007002999A (es) | 2004-09-29 | 2005-09-28 | Virus recombinante que contiene el gen de telomelisin-proteina verde fluorescente. |
BRPI0516191-6A BRPI0516191A (pt) | 2004-09-29 | 2005-09-28 | reagentes para detecção de célula cancerosa, e para diagnose de cáncer, agente indutor de morte celular, e, métodos de detecção de células cancerosas, de diagnose de cáncer, e de indução de morte celular em uma célula alvo |
EA200700694A EA011880B1 (ru) | 2004-09-29 | 2005-09-28 | Рекомбинантный вирус, содержащий ген теломелизина-gfp |
IL181876A IL181876A0 (en) | 2004-09-29 | 2007-03-12 | Telomelysin-gfp gene-containing recombinant virus |
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JP2004285383 | 2004-09-29 | ||
JP2004-285383 | 2004-09-29 |
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PCT/JP2005/018401 WO2006036004A1 (ja) | 2004-09-29 | 2005-09-28 | テロメライシン-gfp遺伝子含有組換えウイルス |
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US (3) | US7943373B2 (ja) |
EP (2) | EP1795604B1 (ja) |
JP (1) | JP5006045B2 (ja) |
KR (1) | KR20070059191A (ja) |
CN (1) | CN101035906A (ja) |
AT (1) | ATE520420T1 (ja) |
AU (1) | AU2005288034A1 (ja) |
BR (1) | BRPI0516191A (ja) |
CA (1) | CA2581969A1 (ja) |
EA (1) | EA011880B1 (ja) |
IL (1) | IL181876A0 (ja) |
MX (1) | MX2007002999A (ja) |
NZ (1) | NZ554799A (ja) |
WO (1) | WO2006036004A1 (ja) |
ZA (1) | ZA200703294B (ja) |
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JP2008096266A (ja) * | 2006-10-11 | 2008-04-24 | Olympus Corp | 生体試料解析方法 |
WO2010071114A1 (ja) | 2008-12-18 | 2010-06-24 | シスメックス株式会社 | 血液試料中の癌細胞の検出方法 |
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JP2007319042A (ja) * | 2006-05-30 | 2007-12-13 | Sysmex Corp | 新規な癌細胞検出試料調製用キット及びそれを用いた癌細胞検出用キット |
JP2008096266A (ja) * | 2006-10-11 | 2008-04-24 | Olympus Corp | 生体試料解析方法 |
WO2010071114A1 (ja) | 2008-12-18 | 2010-06-24 | シスメックス株式会社 | 血液試料中の癌細胞の検出方法 |
JPWO2010071114A1 (ja) * | 2008-12-18 | 2012-05-31 | シスメックス株式会社 | 血液試料中の癌細胞の検出方法 |
WO2013027427A1 (ja) | 2011-08-23 | 2013-02-28 | 独立行政法人医薬基盤研究所 | 制限増殖型アデノウイルス |
JPWO2013027427A1 (ja) * | 2011-08-23 | 2015-03-05 | 独立行政法人医薬基盤研究所 | 制限増殖型アデノウイルス |
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JP2013226157A (ja) * | 2013-07-11 | 2013-11-07 | National Institute Of Biomedical Innovation | 遺伝子発現制御機構を含む新規Adベクター |
WO2021010369A1 (ja) * | 2019-07-12 | 2021-01-21 | 学校法人順天堂 | ウイルスを用いた循環腫瘍細胞の検出方法 |
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EA200700694A1 (ru) | 2007-08-31 |
EP1795604A4 (en) | 2008-08-27 |
BRPI0516191A (pt) | 2008-08-26 |
EA011880B1 (ru) | 2009-06-30 |
IL181876A0 (en) | 2007-07-04 |
JPWO2006036004A1 (ja) | 2008-05-15 |
AU2005288034A1 (en) | 2006-04-06 |
KR20070059191A (ko) | 2007-06-11 |
US20080032283A1 (en) | 2008-02-07 |
NZ554799A (en) | 2009-03-31 |
US20110111480A1 (en) | 2011-05-12 |
MX2007002999A (es) | 2007-08-07 |
ATE520420T1 (de) | 2011-09-15 |
EP2311499A1 (en) | 2011-04-20 |
US20060067890A1 (en) | 2006-03-30 |
US7943373B2 (en) | 2011-05-17 |
EP2311499B1 (en) | 2012-08-29 |
CN101035906A (zh) | 2007-09-12 |
EP1795604B1 (en) | 2011-08-17 |
CA2581969A1 (en) | 2006-04-06 |
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ZA200703294B (en) | 2008-08-27 |
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