WO1997010333A1 - Nouvelles proteines s'exprimant specifiquement dans le cancer du foie, genes codant ces proteines, anticorps actifs contre ces proteines et procede de detection de l'expression de ces proteines - Google Patents
Nouvelles proteines s'exprimant specifiquement dans le cancer du foie, genes codant ces proteines, anticorps actifs contre ces proteines et procede de detection de l'expression de ces proteines Download PDFInfo
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- WO1997010333A1 WO1997010333A1 PCT/JP1996/002654 JP9602654W WO9710333A1 WO 1997010333 A1 WO1997010333 A1 WO 1997010333A1 JP 9602654 W JP9602654 W JP 9602654W WO 9710333 A1 WO9710333 A1 WO 9710333A1
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- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 108010005652 splenotritin Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 210000001550 testis Anatomy 0.000 description 1
- 229940124597 therapeutic agent Drugs 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 108010080629 tryptophan-leucine Proteins 0.000 description 1
- 238000005199 ultracentrifugation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
- G01N33/57438—Specifically defined cancers of liver, pancreas or kidney
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/82—Translation products from oncogenes
Definitions
- the present invention relates to a novel protein remarkably expressed in liver cancer, a gene encoding the same, an antibody thereto, and a method for detecting the expression.
- the present invention relates to a protein that is remarkably expressed in liver cancer, a gene encoding the protein, an antibody against the protein, and a method for detecting the expression of the protein or the gene.
- a monoclonal antibody against cancer tissue is prepared, an antibody that reacts only with cancer tissue is selected from the obtained monoclonal antibodies, and then a substance to be an antigen that reacts with this monoclonal antibody is selected.
- the method of identifying the target has been used.
- genes obtained from the obtained proteins are selected from gene populations called gene libraries using gene engineering techniques. Was used.
- chaptera 8, 9, 11, 12 describe a method for screening a target gene from a gene library using a monoclonal antibody.
- the target protein be quantitatively large, or that the antigen protein be cell-surface and highly antigenic when monoclonal antibodies are used. Therefore, it is very difficult to obtain a protein that does not correspond to these, and it is also very difficult to obtain a gene encoding the protein.
- the present invention uses a completely different method instead of some of the known methods described above to isolate a gene whose expression in liver pain tissue is higher than that in normal liver tissue. It is.
- an object of the present invention is to provide a novel protein whose expression increases during a carcinogenesis process, a novel gene encoding the protein, and an antibody against the protein.
- Another object of the present invention is to provide a method for monitoring the onset and progress of liver cancer by detecting the expression of the protein and the gene. Disclosure of the invention
- the present inventors have conducted intensive studies in order to achieve the above-mentioned object, and as a result, extracted genes specifically expressed in rat liver cancer using the subtraction method, Genes with increased expression in liver cancer were isolated using a screening method. Then, a full-length cDNA of the gene was obtained from one of the liver cancer cDNA libraries, and the nucleotide sequence of the gene was determined. Further, the amino acid sequence encoded by the gene was determined. In addition, the cDNA was confirmed to be a liver cancer-specific gene by Northern blot hybridization. Furthermore, the protein encoded by the cDNA was expressed in recombinant Escherichia coli, and it was confirmed that the protein had the same function as a natural product.
- novel rat proteins CRTI or HTF
- HRPI also called CSAD
- genes encoding these proteins were isolated from liver cancer.
- a novel human protein GADII specific to liver cancer and a gene encoding the same were isolated.
- the above-mentioned protein was immunized to a mammal excluding a human other than the species from which the protein was derived, an antibody against the protein was prepared, and the antigenicity of the protein was confirmed.
- FIGS. 1A and 1B are diagrams showing results obtained by immobilizing DNA extracted from a gene library obtained from a liver cancer by a subtraction method in Example 1 on a membrane and performing dot blot screening.
- FIG. 1A is a diagram showing the results of screening with a cDNA probe prepared from liver cancer polyA RNA
- FIG. FIG. 2 is a view showing the result of screening with a cDNA probe prepared from normal liver po 1 yA RNA.
- Arrow 1 is a dot of a gene whose expression is increased in liver cancer
- arrow 2 is a dot of a gene whose expression is increased in liver cancer.
- FIGS. 2A and 2B show Northern blots in a system using rat normal liver and 7-month-old hepatocellular carcinoma using the probes (probe A and probe B, respectively) prepared in Examples 3 and 4.
- 5 is a photograph showing the results of analysis by the hybridization method.
- the left column shows normal liver (norma 1), and the right column shows liver cancer (HCC).
- FIG. 3 is a diagram showing the pET3a vector used in Example 3, Example 14 and Example 16.
- FIG. 4 is a view showing one of the pET3a vectors into which the histidine tag used to introduce the CRT I-B ⁇ gene obtained in step 1 was introduced.
- Figure 4 is a photograph showing the results of Northern blot hybridization analysis using gel electrophoresis of total RNA prepared from human liver cancer tissue and non-cancerous liver tissue of the same patient. .
- Lane 1 shows the results of migration of human liver cancer RNA
- lane 2 shows the results of migration of human non-cancerous RNA (normal portion of the same patient).
- the band indicated by the arrow is the target band.
- FIG. 5 is a photograph showing the results of a Western plot (protein level analysis) of various liver cancer tissues prepared in Example 1. From the right, marker (for ladder), rec (positive control, CRT I created in Example 4), N (normal liver), 1
- FIG. 6 is a photograph showing the results of a Western blot using various human ⁇ cells. From the right, positive control, Li 21, LiHM, LiNM (above human liver cancer cells), RERF (human lung cancer cells), AZ (human gastric cancer cells), Hec1 (human uterine cancer cells) ), Alex (human liver cancer cells), MEWO (human melanoma), and PaCa (human pancreatic cancer cells).
- the band indicated by the arrow in the figure is CRTI.
- FIG. 7 is a photograph showing the result of Northern blot hybridization of the distribution of the CRTI gene between rat tissues. The band indicated by the arrow in the figure is a band derived from the CRTI gene.
- FIG. 8 is a photograph showing the results of Northern blot hybridization of the distribution of the CRTI gene between human tissues.
- the bands indicated by the arrows are bands derived from the CRT I gene.
- Lane numbers 1 are heart, 2 are brain, 3 is placenta (Placenta), 4 is lung (Lung), 5 Indicates the liver (Liver), 6 indicates the skeletal muscle (Skeltal Muscle), 7 indicates the beard (Kidney), and 8 indicates the pancreas (Pancreas).
- FIG. 9 is a diagram showing the results of analyzing the mRNA of normal liver and liver cancer by Northern blot hybridization using the HRP I gene as a probe.
- Lane 1 is a normal liver mRNA lane
- Lane 2 is a liver mRNA lane 12 hours after DEN administration
- Lane 3 is a liver mRNA lane 24 hours after DEN administration
- Lane 4 is DEN administration Lanes of liver mRNA 48 hours later
- lane 5 liver cancer mRNA lane 1 month after DEN administration
- lane 6 liver cancer mRNA 3 months after DEN administration
- lane 7 DEN Lane 9 of the liver cancer mRNA 5 months after administration
- lane 9 is the liver cancer mRNA lane 7 months after administration of DEN
- arrow 9 indicates the position of the HR PI mRNA band.
- FIG. 10 is a diagram showing the results of Northern blot hybridization analysis of mRNA of normal liver and liver cancer using the GAD II gene as a probe.
- Lane 1 is a normal liver mRNA lane
- lane 2 is a liver mRNA lane 12 hours after DEN administration
- lane 3 is a liver mRNA lane 24 hours after DEN administration
- lane 4 is DEN administration 48 Lane, liver mRNA lane after time
- lane 5 liver cancer mRNA lane 1 month after DEN administration
- lane 6 liver pain mRNA lane 3 months after DEN administration
- lane 7 DEN Lane 8 of the liver cancer mRNA 5 months after administration
- lane 8 is the liver cancer mRNA lane 7 months after the administration of DEN
- arrow 9 indicates the position of the GAD II mRNA band.
- FIG. 11 is a diagram showing the results of performing SDS-PAGE electrophoresis on the recombinant HRP I partial protein.
- Lane 1 is a lane of a protein produced in a recombinant E. coli
- lane 2 is a lane of a purified recombinant HRPI partial protein
- arrow 3 indicates the position of the band of the HRP I partial protein.
- FIG. 12 is a diagram showing the pB1uebacIII vector used in Example 15.
- FIG. 13 is a diagram showing the results of SDS-PAGE electrophoresis of the recombinant HP RI.
- Lane 1 is a lane for a protein expressed by wild Sf9 cells
- lane 2 is a lane for a protein expressed by recombinant Sf9 cells
- arrow 3 indicates the position of the band of the recombinant HRPI. Represents.
- FIG. 14 is a diagram showing the results of performing a 10% SDS-PAGE electrophoresis on the recombinant GAD II (lane 1). The arrow indicates the position of the recombinant GAD II band.
- FIGS. 15A and 15B are diagrams showing the results obtained by reacting a sample containing the full-length HRP I protein with an anti-HRP I antibody and performing Western plot analysis.
- FIG. 15A is a diagram showing the results of Western blot analysis in which a sample containing the recombinant full-length HRP I protein was reacted with an anti-HRP I antibody
- FIG. 15B is a diagram showing rat liver extract and anti-HR PI
- FIG. 4 is a diagram showing the result of performing a western plot analysis by reacting with an antibody. Lane 1 in FIG.
- lane 15A is a lane in which the recombinant HRP I was electrophoresed
- Lane 2 is a lane in which the liver ⁇ tissue extract was electrophoresed
- arrow 3 indicates the position of the band of the recombinant HRP I. Represent.
- lane 4 is a lane in which a normal liver extract was run
- lane 5 is a lane in which a liver cancer extract was run 7 months after DEN administration
- arrow 6 is an HR PI band. Represents the position of.
- FIG. 16 is a diagram showing expression of the HR PI gene in each organ.
- Lane 1 is the lane in which the heart mRNA was migrated
- Lane 2 is the lane in which the brain mRNA was migrated
- Lane 3 was the lane in which the spleen mRNA was migrated
- Lane 4 was the lung mRNA Lane 5, lane 5 migrating liver mRNA, lane 6 lane migrating skeletal muscle mRNA, lane 7 lane migrating kidney mRNA, lane 8 This is the lane in which mRNA was migrated, and arrow 9 indicates the position of the HRP I mRNA band.
- FIG. 17 is a diagram showing expression of the GAD II gene in each organ.
- Lane 1 is a lane where heart mRNA was migrated
- lane 2 was a lane where brain mRNA was migrated
- lane 3 was a lane where spleen mRNA was migrated
- lane 4 was a lane where lung mRNA was swam and lane 5, lane migrated liver mRNA, lane 6 migrated skeletal muscle mRNA, lane 7 migrated lane mRNA, lane 8 migrated testis mRNA
- Lane 9 indicates the position of the GAD II mRNA band.
- the present invention relates to a protein whose expression in liver cancer tissue is increased as compared to normal liver tissue, a gene encoding the same, an antibody specific thereto, and a cancer by detecting those protein and gene. Is one method of monitoring.
- An amino acid having one or more amino acids added, deleted, or substituted in the amino acid sequence of SEQ ID NO: 1 in the sequence listing, and the expression of the protein in liver tissue is expressed in normal cells. It is a protein characterized by being added to cancer cells in comparison.
- a DNA comprising a nucleotide sequence encoding at least a part of the protein according to any one of the above 1 to 3, and the DNA hybridizes to RNA encoding the entire protein. It is a DNA characterized by the following.
- a DNA consisting of 12 or more consecutive nucleotides in the nucleotide sequence encoding the protein according to any one of the above 1 to 3, and having a GC content of 30 to 70%.
- a DNA comprising 16 or more consecutive bases in the nucleotide sequence encoding the protein described in any one of the above 1 to 3, and having a GC content of 30 to 70%.
- DNA consisting of 16 or more consecutive bases of the base sequence represented by SEQ ID NO: 2 in the sequence listing and having a GC content of 30 to 70%.
- RNA comprising a nucleotide sequence encoding the protein according to any one of the above 1 to 3. 17. An RNA consisting of at least 12 consecutive nucleotides in the nucleotide sequence encoding the protein according to any one of the above 1 to 3, and having a GC content of 30 to 70%.
- RNA comprising 16 or more consecutive bases in the nucleotide sequence encoding the protein according to any one of the above 1 to 3, and having a GC content of 30 to 70%.
- RNA according to any one of the above 16-18, which is chemically modified.
- a method for detecting cancer comprising detecting the protein according to any one of 1 to 3 above in a tissue of a mammal using the antibody according to 21 or 22. .
- RNA encoding a protein according to any one of the above 1 to 3 present in a mammalian tissue is detected using the DNA according to any of the above 4 to 14 as a probe.
- a method for detecting a cancer characterized in that: 28. The method for detecting a cancer according to 27 above, wherein the mammalian tissue is a liver tissue.
- An amino acid in which one or more amino acids have been added, deleted or substituted in the amino acid sequence set forth in SEQ ID NO: 3 of the sequence listing, and the expression of the protein in liver tissue is expressed in normal cells. It is a protein characterized by being increased in cancer cells.
- a DNA comprising a nucleotide sequence encoding the protein according to any one of 29 to 31.
- a DNA comprising a nucleotide sequence encoding at least a part of the protein according to any one of 29 to 31, wherein the DNA encodes the entire protein.
- DNA that is characterized by hybridizing with RNA.
- DNA consisting of 12 or more consecutive nucleotides in the nucleotide sequence encoding the protein according to any one of 29 to 31, and having a GC content of 30 to 70%.
- a DNA comprising 16 or more consecutive bases in the nucleotide sequence encoding the protein according to any one of 29 to 31, and having a GC content of 30 to 70%.
- DNA consisting of 16 or more consecutive bases in the base sequence represented by SEQ ID NO: 4 in the sequence listing and having a GC content of 30 to 70%.
- RNA comprising a nucleotide sequence encoding the protein according to any one of 29 to 31 above.
- RNA comprising at least 12 consecutive nucleotides of the nucleotide sequence encoding the protein according to any one of 29 to 31, and having a GC content of 30 to 70%.
- RNA comprising at least 16 consecutive nucleotides in the nucleotide sequence encoding the protein according to any one of 29 to 31, and having a GC content of 30 to 70%.
- RNA according to any one of the above 42 to 44 which is chemically modified.
- 46. An antisense RNA of the RNA according to any one of the above 42 to 44.
- a method for detecting a cancer comprising detecting the protein according to any one of the above 29 to 31 existing in a tissue of a mammal using the antibody according to the above 47.
- RNA encoding the protein according to any one of the above 29 to 31 present in the tissue of a mammal using the DNA according to any one of the above 32 to 40 as a probe It is a method for detecting a cancer, characterized in that it is detected by detecting a cancer.
- a DNA comprising a base sequence encoding the protein according to any one of 54 to 56.
- a DNA comprising a nucleotide sequence encoding at least a part of the protein according to any one of the above 54 to 56, and wherein the DNA encodes all of the protein. DNA characterized in that it hybridizes with DNA.
- a DNA comprising the nucleotide sequence from the 65th A to the 1582th A of the nucleotide sequence shown in SEQ ID NO: 6 in the sequence listing.
- nucleotide sequence encoding the protein according to any one of the above 54 to 56 DNA consisting of at least 12 consecutive clays and having a GC content of 30 to 70%.
- a DNA comprising 16 or more consecutive bases in the base sequence encoding the protein according to any one of 54 to 56, and having a GC content of 30 to 70%.
- DNA consisting of 12 or more consecutive nucleotides in the base sequence represented by SEQ ID NO: 6 in the sequence listing and having a GC content of 30 to 70%.
- RNA comprising a base sequence encoding the protein according to any one of the above 54 to 56.
- RNA comprising at least 12 consecutive nucleotides of the nucleotide sequence encoding the protein according to any one of 54 to 56, and having a GC content of 30 to 70%.
- RNA comprising 16 or more consecutive bases in the nucleotide sequence encoding the protein according to any one of 54 to 56, and having a GC content of 30 to 70%.
- a cancer comprising detecting the protein according to any one of 54 to 56 present in a tissue of a mammal using the antibody according to 72 or 73. Is a detection method.
- tissue of the mammal is a liver tissue.
- RNA that encodes the protein according to any one of 54 to 56 present in a mammalian tissue is used as a probe with the DNA according to any one of 57 to 65 as a probe.
- a method for detecting a cancer characterized in that the method is used for detection.
- An amino acid having one or more amino acids added, deleted or substituted in the amino acid sequence set forth in SEQ ID NO: 7 in the sequence listing, and the expression of the protein in liver tissue is expressed in normal cells. It is a protein characterized by being added to cancer cells in comparison.
- a DNA comprising 12 or more consecutive bases in the base sequence encoding the protein according to any one of 80 to 82 and having a GC content of 30 to 70%.
- a DNA comprising 16 or more consecutive bases in the base sequence encoding the protein according to any one of 80 to 82 and having a GC content of 30 to 70%.
- DNA comprising 12 or more consecutive bases in the base sequence represented by SEQ ID NO: 8 in the sequence listing and having a GC content of 30 to 70%.
- DNA consisting of 16 or more consecutive bases of the base sequence represented by SEQ ID NO: 8 in the sequence listing and having a GC content of 30 to 70%.
- RNA comprising a base sequence encoding the protein according to any one of 80 to 82.
- RNA comprising at least 12 consecutive bases in the nucleotide sequence encoding the protein according to any one of 80 to 82, and having a GC content of 30 to 70%.
- RN consisting of 16 or more consecutive nucleotides in the nucleotide sequence encoding the protein of any one of 80 to 82, and having a GC content of 30 to 70%.
- RNA according to any one of 93 to 95 which has been chemically modified.
- 97 An antisense RNA of the RNA according to any one of 93 to 95.
- a method for detecting cancer comprising detecting the protein according to any one of the above 80 to 82 present in a mammalian tissue using the antibody according to the above 98 or 99. .
- RNA encoding the protein according to any one of the above 80-82 present in a mammalian tissue using the DNA according to any one of the above 83-91 as a probe A method for detecting a cancer, characterized in that:
- the present invention relates to a protein specifically expressed in liver cancer and a gene encoding the same. They are obtained from rat liver, as disclosed in the Examples below. It was obtained by isolating the gene specifically present in liver cancer by the subtraction method and determining the nucleotide sequence. Then, a protein specifically expressed in liver cancer was identified and isolated from the gene.
- liver cancer-specific proteins were named rat CRTI, rat HRPI, rat GADII and human GADII, respectively.
- the amino acid sequences of these proteins and the gene sequences encoding them are shown in SEQ ID NOs: 1 and 2, 3 and 4, 5, and 6, 7 and 8, respectively.
- the protein isolated in the present invention also has the same function as the protein, and has a homology with the protein of 30% or more (preferably 40% or more). It is quite possible that mammals other than rats also have the protein.
- the fact that there is a homology here means that a homologous amino acid is generally counted as a positive one by a calculation method. If the length of the amino acid chain is different, the It indicates the ratio of the part with the homology to the length.
- the protein according to the present invention means a protein having the following two features.
- liver cancer In liver tissue, expression in liver cancer is significantly increased compared to expression in normal cells.
- the genes encoding CRT I, HRP I, and GAD I I according to the present invention are the genes encoding CRT I, HRP I, and GAD I I as defined above, respectively.
- the present invention relates to the antigenicity of the above-mentioned proteins, ie, CRT I, HRP I and GAD II, as exemplified in the Examples, for immunizing mammals other than the species from which the protein is derived and other than humans. This makes it clear that antibodies can be easily obtained by performing the method. Therefore, the antibodies against CRT I, HRP I, and GAD II of the present invention can be obtained by the same method, that is, anti-blood and polyclonal antibodies obtained by immunizing animals other than the species from which the protein is derived.
- Null antibodies are included within that range. It is also frequently used by those skilled in the art to use, as an immunogen, a protein obtained by binding a part of the protein to another carrier protein such as blood serum albumin, even if it is a part of the protein. It is a way to be. A part of the protein may be synthesized using, for example, a peptide synthesizer. It is preferable that a part of the protein has eight or more amino acid residues in order to sufficiently act as an immunogen.
- a polyclonal antibody can be obtained by immunization
- a monoclonal antibody can be produced by a hybridoma using lymphocytes of the immunized animal (for example, ⁇ Antibodies AL aboratory Manual (Cold Spring Harbor Laboratory Press, 1 988) Chapter 6). Therefore, the antibodies against CRT I, HR PI, and GAD II of the present invention include polyclonal antibodies and monoclonal antibodies within the scope thereof.
- the method for detecting CRT HRPI or GADIII includes a method using an antibody, a method using an enzymatic reaction utilizing an enzymatic reaction, and a method for detecting each gene.
- the method using an antibody include: (1) a method of detecting the protein using an antibody against each of the above proteins; and (2) a detection of the protein using an antibody against each of the proteins and a labeled secondary antibody of the antibody.
- Method for example, a radioisotope (R I), an enzyme, avidin or biotin, or a fluorescent substance (FITC, rhodamine, etc.) is used.
- ELISA As a method of using an antibody utilizing an enzymatic reaction, for example, ELISA is mentioned.
- the examples of the present invention disclose the optimum conditions for the properties of the membrane used and the length of the probe to be obtained. If the length of the membrane or the probe is different, the hybridization can naturally be performed under different hybridization conditions. . For example, Hybridization may occur even without sodium phosphate.
- One preferred embodiment is as follows.
- Reaction time 50 minutes or more 1 hour 10 minutes or less
- sodium pyrophosphate (pH 6.8) or SDS is mainly used mainly for improvement based on background.
- the probe used for detection of the gene can be either DNA or RNA.
- the base number of non-Bok of the genome is said to be 3 X 1 0 9 pieces. Since there are 4 16 types of 16-base DNA, a DNA of this length can identify all human proteins.
- the length required for the probe is theoretically 16 bases. Needless to say, it is desirable that the length be longer than this in practical use, but practically, 12 or more bases are often used in terms of synthesis efficiency, operability, and the like.
- a non-coding region or a coding region can be used as a probe.
- any of the non-coding region and the coding region can be used as the probe.
- the antisense DNA or antisense RNA of the present invention includes naturally occurring nucleotides consisting of a plurality of nucleotides consisting of bases, phosphates, and sugars. All are included, including those that do not.
- the antisense polynucleotide derivative of the present invention includes all those whose tertiary structure and function are similar to those of the polynucleotide.
- substitutions, deletions, and / or additions have been made to the 3'-end or 5'-end of a polynucleotide to which another substance is bound, or to at least a part of the base, sugar, or phosphate of the polynucleotide
- the antisense polynucleotide and its derivative may hybridize to any part of the polynucleotide encoding the protein whose expression is increased in the liver cancer of the present invention. It has a base sequence complementary to a part of mRNA encoding all or part of the protein, and hybridizes to the mRNA. Things are preferred. Particularly preferred is one that hybridizes to mRNA encoding at least CRT I, HRP I or GAD II.
- the antisense polynucleotide and its derivative can be used as a research polynucleotide probe for examining the presence of a polynucleotide encoding a protein whose expression is increased in the liver cancer of the present invention in a tissue or a cell, and the state of its expression. It can be used immediately. It can also be used as a polynucleotide probe for diagnosis.
- the probe those having 12 bases or more and a GC content of 30 to 70% are preferable, and those having 16 bases or more and a GC content of 30 to 70% are particularly preferable.
- the antisense polynucleotide and its derivative can be used to regulate the expression of a protein of the present invention whose expression is increased in the liver cancer. Since these are expected to hybridize to the gene encoding the protein or mRNA and suppress the expression of the protein, they are useful as therapeutic agents for diseases based on abnormalities in functions involving the protein. Can be used. That is, it is possible to develop an antisense drug from the antisense polynucleotide or a derivative thereof.
- an example of an antisense polynucleotide derivative is preferably a derivative having at least one of enhanced nuclease resistance, tissue selectivity, cell permeability, and avidity.
- the polynucleotide derivative is a derivative having a phosphorothioate bond as a skeletal structure.
- the polynucleotide of the present invention and derivatives thereof also include derivatives having these functions or structures.
- the method for producing the antisense polynucleotide derivative of the present invention for example, the method described in U1n Antisense Research and Apications (CRC Publishing, Florida, 1999) can be used. .
- the antisense polynucleotide of the present invention can be obtained by a PCR method using a gene encoding a protein whose expression is increased in the liver cancer of the present invention as a type II.
- Some derivatives such as a methylphosphonate type and a phosphorothioate type can be synthesized using a chemical synthesizer (for example, Model 394 manufactured by PerkinElmer Japan).
- a chemical synthesizer for example, Model 394 manufactured by PerkinElmer Japan.
- the target polynucleotide or polynucleotide derivative can be obtained.
- Modifications that can be introduced during chemical synthesis include, for example, 1) biotinylation, 2) methylation, 3) dikoxygenination, 4) dephosphorylation, 5) fluorescent labeling (fluorescein, mouth-damine, Texas red and its derivatives), 6) Amination, 7) Synthesis of DNA and RNA in which S in the phosphate group is replaced with O.
- Chemical modifications that can be introduced enzymatically include, for example, 1) biotinylation, 2) methylation, 3) dicoxigenation, 4) dephosphorylation, 5) fluorescent labeling (fluorescein, rhodamine, Texas Red and its Derivatives), 6) Enzyme labeling (alkaline phosphatase).
- the DNA and RNA of the present invention include the chemically modified DNA and RNA in its range.
- Monitoring of the progress of cancer by detecting CRT I, HRP I or GAD II can be performed by examining the presence of the protein in tissues or cells collected from a subject.
- CRT I, HRP I or GAD II is secreted or released extracellularly. If issued, it is possible to monitor the progress of cancer by examining the presence or absence of CRT I, HRP I or GAD II in the subject's blood. Specifically, it may be performed in the same manner as the above-mentioned method for detecting CRT I, HRP I or GAD II (a method using an antibody, a method using an antibody utilizing an enzymatic reaction, and a method for detecting each gene).
- monitoring of the degree of progress of cancer by a gene can be performed by examining whether or not the gene is present in tissues or cells collected from a subject.
- the method for detecting the gene includes the Northern blot hybridization method—the RT-PCR method and the in situ hybridization method.
- Example 1 Protein whose expression is increased in liver cancer and its gene
- the liver cancer rat was prepared based on the Salt-Farber method ("Nature" Vol. 263, 1976, pp 701-703). Actually, a 5-week-old Wistar rat (Funa Tachibana Co., Ltd.) was intraperitoneally administered with getylnitrosamine (DEN), and two weeks later it contained 0.02% of 2-aminoacetylfluorene (AAF). Oral administration of M feed (manufactured by Oriental Yeast) was started, and one week later, regenerative liver surgery was performed. At 12, 24, 48 hours and 1, 3, 5, and 7 months after DEN administration, the liver was removed and used for RNA preparation later.
- DEN getylnitrosamine
- AAF 2-aminoacetylfluorene
- a regenerated liver showing normal growth was prepared by removing the liver at 12, 24, and 48 hours after regenerative liver surgery, and used for subsequent analysis.
- RNA was prepared based on the method described in “Methodsinenzymo 1 ogy” V o 1 ⁇ 154 (academic Press 11, 1987) 3-28. actually,
- the solution was centrifuged at 1500 rpm to recover the solution portion.
- RNA is oligotexd T 30 super TM (Manufactured by Nippon Roche) according to the instruction manual. The amount of the total RNA used was 1 mg each time, and the RNA was purified by using oligotexd T30 super TM ( 7501). In each liver, about 20 ⁇ g of po 1 yA RNA was obtained from 1 mg of total RNA.
- the po 1 y A RNA used as the material was 7-month-old liver cancer and normal liver, and 15 ⁇ g of each was used.
- the cDNA subtraction reaction was carried out between this sense strand cDNA and normal liver cDNA-oligotexd T30 super TM .
- pBLuescrripTII vector (Stratagene) was cut with EcoRI and XhoI (Takara Shuzo). As the cutting conditions, the conditions shown in 3. (2) were used.
- step (4) all the reaction solutions reacted in step (4) are mixed with E. c 0 1 i JM1 09 combi-tent cells (manufactured by Takara Shuzo), and placed on ice for 30 minutes, 42 at 45 seconds, and on ice. After the reaction was performed for 3 minutes, SOC medium 9001 was added, and the mixture was left at 37 for 1 hour, and the vector was introduced into E. coli JMl09. Thereafter, E. coli JM109 was recovered.
- the Escherichia coli was spread on an LB agar medium having the following composition and cultured overnight to form a colony.
- nucleotide sequence was performed according to the method described in "MolecuLarClonIngSececOndEdiotion". Actually, the nucleotide sequence of the gene having a large amount of binding to the cDNA probe of the obtained liver cancer was determined on the pB1uescript II by the dideoxytaminator method using T7 sequencekit TM (manufactured by Pharmacia). The sequence of the gene part inserted in was read.
- the homology analysis was performed by querying the determined nucleotide sequence of the gene to a data bank of DDB J (DNA DataBase Jap an). As a result, the above three genes were found to be novel genes with no homology found. These genes were named CRT I gene, HRP I gene and GAD I I gene, respectively. For each gene, the following analysis was performed to confirm whether the gene was full-length.
- a double-stranded cDNA is synthesized by a reverse transcription reaction and a DNA synthesis reaction using a DNA polymerase using a random primer, and a Not I / Eco RI adapter is added to both ends of the cDNA. 4 DNA ligase treatment and polynucleotide kinase treatment were performed. As a result, cDNA having EcoRI restriction enzyme cleavage sites at both ends was obtained.
- This cDNA was inserted into a gtll cloning vector (Pharmacia) using T4 DNA ligase, packaged using GI GAPACK Go Id TM (Stratagene), and c DNA was introduced and used for gene isolation.
- the filter was used to denature the cDNA in the plaque with sodium hydroxide.
- the denaturation conditions were the same as those described in 7. (1).
- the denatured cDNA was heat-treated at 75 for 2 hours, fixed, and used for hybridization.
- the probe used in the hybridization A part of the CRTI gene whose base sequence was determined was labeled with 32 P-d CTP by random labeling (using a random labeling kit manufactured by Behringer Mannheim). The conditions for hybridization and washing were in accordance with those described in the literature.
- Example 1 The ⁇ phage recovered from the plaque formed on the NZY agar medium in 1 1. (4) or (5) of Example 1 was suspended in the SM solution.
- the DNA cleavage system was as follows, and DNA was digested with a restriction enzyme Not I (Takara Shuzo).
- CRT I-A The recombinant Escherichia coli transfected with this CRT I gene (CRT I-A) was transferred to the Institute of Biotechnology and Industrial Technology, the Institute of Industrial Science and Technology of the Ministry of Commerce and Industry (1-3 1-3 Higashi, Tsukuba, Ibaraki, Japan) in 1995. 1 Deposited on January 21 (Accession No. F ERM P—15302), and then transferred to the International Depositary on September 9, 1996 (Accession No. FE RM BP -5658).
- white colonies were inoculated on 2 ml LB medium (containing 100 ⁇ g / m1 ampicillin) and cultured at 37 for 16 hours.
- the full-length CRTI gene used was obtained by the method described in Example 1.11. Hybridization conditions and washing conditions were as described in the literature.
- the resulting gene fragment was introduced into Escherichia coli in the same manner as described in 1., 2., 3., and 2. of Example 2.
- the nucleotide sequence of this gene fragment was determined by the method described in this section. As a result, a CRTI gene fragment containing SEQ ID NO: 2 from position 500 to position 1415 was obtained.
- CRT I-B a recombinant Escherichia coli (E. coli HB101) transfected with this gene
- CRT I-B a biotechnology industrial research institute
- Ichihigashi 1-chome 1-3 Deposited at Ichihigashi 1-chome 1-3 (Accession No. FERM P-155303), and the international deposit was transferred on September 9, 1996 (Accession No. FERM BP-5659).
- CRT I—A is SEQ ID NO: 2 in the sequence listing Including 525th to 2520th.
- the amino acid sequence of CRTI was determined from the nucleotide sequence determined in 4.
- the amino acid sequence of CRTI is shown in SEQ ID NO: 1 in the sequence listing.
- a CRTI gene probe labeled with 32 P-d CTP was prepared.
- analysis was performed by the Northern blot hybridization method in a system using normal liver and 7-month-old liver cancer.
- the CRTI gene was detected as a gene that was significantly increased in liver cancer. From this, it was found that using the CRTI gene makes it possible to distinguish liver cancer from normal liver, that is, it is possible to diagnose liver cancer.
- Figure 2 probe A
- Kodak XAR film was used for the film
- Dupont Lighting Plus was used for the screen.
- HCC indicates liver cancer.
- Fig. 2 the results of Northern blot hybridization analysis of poly A RNA derived from hepatocellular carcinoma using the probe of Example 3 of the CRT gene are detected.
- the band observed at about 2.0 kb corresponds to the gene having the nucleotide sequence from the 500th to the 2520th base sequence in SEQ ID NO: 2 in the sequence listing.
- Another gene corresponding to the band found at about 2.5 kb was obtained by the method described in Example 1.11.
- the nucleotide sequence of the obtained gene was determined by the methods described in 1. to 4. in Example 2. It was shown that the gene was extended 499 bp to the 5 'side of the gene of about 2.0 kb.
- the obtained CRTI gene base sequence of about 2.5 kb is shown in SEQ ID NO: 2 in the sequence listing.
- DNAs from positions 1 to 372 of the 499 bp obtained above were According to the method described in Example 3, Northern plot hybridization was performed. In autoradiography, Kodak XAR film was used for the film, and DuPont Lighting Plus (+) was used for the screen, and exposed at 180 ° C for 24 hours. The presence of a 2.5 bp band specific to rat liver cancer was confirmed in a system using po1yA RNA from rat normal liver and liver cancer (Fig. 2 (probe B)). This result indicates that liver cancer can be detected based on the 499 bp DNA obtained above.
- TREB 5 (or XBP) was searched as a sequence having the homology, and about 79% of the homology with the CRT I of the present invention was found.
- TREB 5 is reported in The EM BO Journal vol.9, No.8, pp 2537-2542 (1990)
- XB P is reported in Science vol.247, ppl58 1584 (1990). I have.
- the CRT I-B gene obtained in Example 2 was inserted into a histidine-tagged pET3a vector (FIG. 3), and then introduced into Escherichia coli BL21 (DE3) pLysS.
- E. coli was recovered, suspended in Lysis Buffer, sonicated, and used with a Beckman Optima XL—80 using a 50.2 Ti rotor for 18000. r pm, at 4. Centrifuged for 15 minutes. (3) Thereafter, the precipitate was dissolved in 6M guanidine hydrochloride and purified using Ni-agarose (manufactured by Qiagen) according to the instruction manual.
- the purified sample was subjected to SDS-polyacrylamide electrophoresis and stained with Coomassie-Priable Blue to confirm that the purification was successful.
- RNA was prepared from human liver cancer tissue and non-cancerous liver tissue of the same patient, respectively, according to the single-step RNA isolation method described in Chapter 4 of Shirrent Protocols in Molecular Biology. . Reagents, operating environment, and the like also followed the conditions described in the above-mentioned literature.
- Fig. 4 shows the results.
- the expression level of the human liver cancer was significantly increased in the cancerous part compared with the non-cancerous part. This indicates that it is possible to monitor human liver cancer by using this CRTI gene.
- Example 5 The CRT I protein prepared in Example 5 was replaced with “Antibodies AL abo Rabbit rabbits were immunized according to the method described in Chapter 5 of Cold Rabbit Laboratory (1988), and an anti-CRTI antibody was prepared.
- an anti-CRTI antibody was reacted with the CRTI protein.
- the secondary antibody was reacted with an alkaline phosphatase-labeled anti-Egret IgG antibody, and then the alkaline phosphatase was reacted with a substrate (NBT, BC ID (both from Promega)) to develop color. . This confirmed that the anti-CRTI antibody reacts with CRTI.
- liver cancer tissue (lg) prepared in Example 1 was homogenized with 5 ml of 2 ⁇ SDS samp 1 ebuf fer, and then boiled for 3 minutes to obtain a liver cancer tissue extract.
- Example 7 the anti-CRTI antibody prepared in Example 7 was reacted with the extract.
- an anti-Egret IgG antibody labeled with alfa phosphatase is reacted, and the alkaline phosphatase is reacted with a substrate (NBT, BC ID (both manufactured by Puguchi Mega)) to produce color. (Fig. 5).
- NBT, BC ID both manufactured by Puguchi Mega
- a significant increase in the CRT I protein was confirmed in liver cancer and in the process of developing liver cancer. That is, the antibody distinguishes between liver cancer and normal liver and It was confirmed that the liver in the process of expression can be distinguished from normal liver, and that it can be used for early diagnosis of liver cancer.
- Li 21 (human liver cancer cell line) 2 Li HM (human liver cancer cell line) 3 Li NM (human liver cancer cell line) 4 RERF (human lung cancer cell line) 5 AZ (human gastric cancer cell line) ) 6 He c 1 (Human uterine cancer cell line) 7 Alex (Human liver cancer cell line) 8 ME WO (Human melanoma) 9 P a Ca (Human knee cancer cell line) 4, 5, 6 , 8 and 9 for JC RB (Japananese Cancer Research search source)
- strains (1) and (2) may be other strains.
- RPMI 1640 supplemented with 10% FCS was used for the medium.
- 4 to 6, 8 and 9 were cultured in the medium recommended at the time of the sale.
- each cultured cell grown to about 80% of the Petri dish area was washed twice with 5 ml lx PBS, and then 2 x 1 lm per 10 cm Petri dish
- Example 7 the anti-CRTI antibody prepared in Example 7 was reacted with the extract.
- Anti-Egret IgG antibody labeled with alkaline phosphatase was reacted as a secondary antibody.
- the alkaline phosphatase was reacted with a substrate (NB and BC ID (both manufactured by Promega)) to develop a color (FIG. 6).
- NB and BC ID both manufactured by Promega
- FIG. 6 the expression of CRTI protein was confirmed in all the cancer expression processes including liver cancer. That is, it was confirmed that the antibody was able to detect CRTI of cancer cells in humans, and could be used for cancer diagnosis and the like.
- this antibody was found to cross-react with humans and rats.
- Rat MTN B1ot TM (Clontech) was used to confirm the distribution between tissues.
- This product is a commercially available membrane obtained by blotting polYRNA of each rat tissue, which is commercially available for performing the above-mentioned Northern blot hybridization.
- This membrane was prepared according to the method described in “Mo 1 ecu 1 ar Clonin S econd Edition” (Cold Spring Spring Laboratory Press, 1989), pp 7.3—7.84, and in accordance with the product instruction manual. Northern blot hybridization was performed using the same CRT I gene probe as that prepared in Example 3.
- Fig. 7 shows the results. As is evident from the results, the CRT I gene is expressed in all the examined organs, and especially in the liver and lung.
- Example 3 From these results and the results of Example 3, it is considered that if the organs also become cancerous, the expression of the CRTI gene is increased in each organ. It is thought that the monitoring of is possible.
- Hum an MTN B1ot TM (Clontech) was used to confirm the distribution between tissues.
- This product is a membrane obtained by blotting polNARNA of each human tissue, which is commercially available for performing the above-described Northern blot hybridization.
- This membrane was prepared using the method described in “Mo 1 ecu 1 ar Cloning S econd Edition” (Cold Spring Harbor Laboratory Press, 1989), pp 7.3—7.84, and instructions for product use.
- Northern blot hybridization was carried out using the same CRTIII gene probe prepared in Example 3 according to the written description. In radiography, Kodak XAR film was used for the film, and DuPont Lighting Plus (+) was used for the screen, and exposed at -80 for 24 hours.
- Fig. 8 shows the results. As is evident from the results, the CRT I gene is expressed in all the examined organs, especially in the knee and liver.
- Example 6 From these results and the results of Example 6, it is considered that if the organs of a human become cancerous, the expression of the CRTI gene is increased, and the cancer of each human organ is increased by the CRTI gene. It is possible to monitor the onset and progress.
- cancers such as liver cancer can be diagnosed by detecting CRT I or the CRT I gene of the present invention from tissues such as liver.
- the onset of cancer such as liver cancer can be diagnosed based on the gene expression level.
- the use of an anti-CRTI antibody makes it possible to immunohistologically diagnose the onset of cancer such as liver pain. Further, application to the treatment of cancer using the gene or the antibody is expected in the future.
- Example 1 The ⁇ phage recovered from the plaque formed on the NZY agar medium in 1 1. (4) or (5) of Example 1 was suspended in the SM solution.
- the HRPI gene was inserted into the vector by the following procedure.
- the DNA cleavage system was performed as follows, and DNA was digested with a restriction enzyme NotI (Takara Shuzo).
- DNA The DNA obtained in 2) was reacted with the pBluescriptl obtained in 3 in the following system, and DNA was inserted into the vector.
- the GAD II gene was inserted into the vector by the following procedure.
- DNA was digested with a restriction enzyme EcoRI (Takara Shuzo) as follows.
- DNA The DNA obtained in 2) was reacted with the pBluescriptl obtained in 3 in the following system, and the DNA was inserted into a vector.
- the vector containing the HR PI prepared in step 2 and the vector containing the GAD II prepared in step 3 were transferred to the E. coli JM 10 9 After mixing with Combitent Cell (Takara Shuzo) and reacting on ice for 30 minutes, at 42 for 45 seconds and on ice for 3 minutes, add 900 ⁇ l of SOC medium, place for 1 hour at 37, and remove the vector. E. c ⁇ 1 i Introduced to JM109. Thereafter, E.co 1 i JM109 was recovered.
- the recombinant Escherichia coli containing the HRPI gene was deposited at the Research Institute of Biotechnology and Industrial Technology of the Ministry of International Trade and Industry of the Ministry of Trade and Industry (1-1-3 Higashi, Tsukuba, Ibaraki, Japan).
- white colonies were inoculated on 2 ml LB medium (containing 100 ⁇ g Zm1 ampicillin) and cultured at 37 for 16 hours.
- the recovered DNA was sequenced according to the T7 sequencing kit (Pharmacia), and the entire nucleotide sequence was determined.
- the nucleotide sequence of the HRP I gene is shown in SEQ ID NO: 4 in the sequence listing
- the nucleotide sequence of the GAD II gene is shown in SEQ ID NO: 6 in the sequence listing.
- Homologous search using the database for the obtained GAD II gene sequence As a result, the CSAD gene was searched as a sequence having a homology in some of them.
- the CSAD gene has been reported in Biochemica et Biophysica Acta vol.1262, pp79-82Q995).
- the cDNA library used was a Human Liv er 5'-Stre tch hlusc DNA library from CLONTE CH. This c
- the DNA library was mixed with NZY medium containing 0.7% agar and spread on NZY medium plates containing 1.5% agar.
- a plaque containing a large amount of cDNA was formed by culturing for 6 hours at 42.
- a nitrocellulose filter Imobilon (registered trademark, manufactured by Millipore) was placed on this plate, and the formed plaque was formed.
- Millipore nitrocellulose filter
- the denatured cDNA was heat-treated at 75 ° C for 2 hours, fixed, and used for hybridization.
- the probe used for the hybridization was a rat GAD II gene whose nucleotide sequence was determined in step I, 65 of SEQ ID NO: 4 in the sequence listing. Th with which up to 61 first G was 32 P- d CT P-labeled random labeling (using the random labeling kit from Boehringer Man high beam) from A.
- the conditions for hybridization and washing were in accordance with those described in the literature.
- nucleotide sequence of human GAD II gene was determined in the same manner as in I. That is, the procedure was performed as follows.
- the human GAD II gene was inserted into the vector by the following procedure.
- the DNA cleavage system was performed as follows, and the DNA was digested with a restriction enzyme EcoRI (Takara Shuzo).
- DNA The DNA obtained in 2) was reacted with the pBluescriptl obtained in 3 in the following system, and the DNA was inserted into the vector.
- the vector containing the human GAD II inserted in (2) was mixed with E. coli JM109 competent cells (Takara Shuzo) in the usual manner according to a standard method, and the mixture was placed on ice for 30 minutes. , 42 for 45 seconds and on ice for 3 minutes, then added 900 ⁇ l of SOC medium, kept for 37 hours, and introduced the vector into E. coli JM109. Thereafter, E.coIiJM109 was recovered.
- the recombinant Escherichia coli having the human GAD II gene introduced was named hCSAD2 and deposited with the Institute of Biotechnology and Industrial Technology, Institute of Industrial Science and Technology, Ministry of International Trade and Industry (1-1-3, Higashi 1-3-1, Tsukuba, Ibaraki, Japan). (Accession No. FE RM P-1 575 6 2) and transferred to the International Depositary on September 4, 1996 (Accession No. FE RM BP _ 565 3).
- E.co 1 iJ M109 collected in (3) was transferred to LB agar medium (100 ⁇ g / m 1 ampicillin, 0.1 mM IPTG, 0.004% X-ga 1) And cultured at 37 for 16 hours.
- white colonies were inoculated on 2 ml LB medium (containing 100 ⁇ g Zm1 ampicillin) and cultured at 37 for 16 hours.
- the recovered DNA was sequenced using a DNA sequencing kit (Dye-Minator method, manufactured by PerkinElmer) according to the instruction manual, and the entire nucleotide sequence was determined.
- the nucleotide sequence is shown in SEQ ID NO: 8 in the sequence listing.
- the homology with the rat GADII gene human homology with rat
- the homology calculation was performed using the maximum matching of DINA SIS V e r 3.0 (manufactured by Hitachi Software Engineering Co., Ltd.).
- Escherichia coli prepared in step 1 was cultured in an LB medium containing 100 ⁇ g "m1 of ampicillin, and the turbidity measured by a spectrophotometer (Beckman) reached 0.5 at a wavelength of 600 nm. Then, IPTG was added to a concentration of 0.5 mM to induce the expression of the HRP I protein.
- Escherichia coli was collected, suspended in a lysis buffer, sonicated, and used with a Beckman Otima XL-80. at pm, 4. Centrifuged for 15 minutes.
- the HRPI ⁇ gene was incorporated into the pB1ueBacIII vector-1 (Invitrogen) into which the histidine tag shown in FIG. 12 was introduced. The details are described below.
- the nucleotide sequence encoding the first methionine portion of the HRP I gene was amplified as an Nde I recognition site.
- EcoRI / NdeIno EcoRI adapter (5 'AATTC CATA ATGG 3') was synthesized using a DNA synthesizer, and T4 polynucleotide kinase (Takarashu) And phosphorylation according to the instructions.
- NdeI and SacI of the vector prepared in 6) were cut, and the gene prepared in 4) was inserted into the site.
- the vector was introduced into Escherichia coli JM109 according to a conventional method, and the Escherichia coli into which the vector was inserted was cultured in an LB medium (containing 100 ⁇ g Zm1 of ampicillin).
- the desired vector was purified from the cultured Escherichia coli using MagnicMinip (Promega, registered trademark) according to the manufacturer's instructions.
- the vector was ligated to NdelNcoI linker (5, TATCCATGG 3 ') using Ligation Pack, and both ends of the vector were set to NcoI. .
- the plasmid prepared in a large amount was introduced into Sf9 cells by the Lipofection method (DO TAP (registered trademark, manufactured by Boehringer Mannheim)).
- DO TAP registered trademark, manufactured by Boehringer Mannheim
- FIG. 13 shows the results of SDS-PAGE electrophoresis.
- the rat GAD II gene was incorporated into the histidine tag-introduced pET3a vector shown in FIG. The details are described below.
- the pBluescript II vector into which the GAD II gene prepared in 3. of Example 12 was inserted was inserted by PCR (“Curentprotocolsin mole le biology” (Greene Pu blishing As sociates and Wiley—described in Interscience, 1987) chapter 15), using the primers of the nucleotide sequences of the following formulas (3) and (4), the first methionine of the GAD II gene An EcoRI site was introduced before the nucleotide sequence encoding the portion to increase the length.
- the gene excised in (2) and the gene excised in (3) were ligated using Ligati0nPack (manufactured by Nippon Gene) in accordance with the instruction manual to prepare a GADII gene.
- the pET3a vector into which the histidine tag shown in FIG. 3 was introduced was digested with EcoRI and SmaI, and then dephosphorylated.
- the GAD II gene prepared in 64 and the vector prepared in 5 were ligated using LigatonPacck (manufactured by Nippon Gene) according to the instruction manual.
- the gene inserted into the vector in the above process was confirmed by reading the base sequence of the inserted fragment.
- the Escherichia coli was cultured in an LB medium containing 100 ⁇ g / m1 of ampicillin, and when the turbidity reached 0.5 at a wavelength of 600 nm using a spectrophotometer (manufactured by Beckman), the IPTG was added to 0. GAD II expression was induced at 5 mM.
- E. coli was recovered, suspended in lysis buffer, sonicated in 4 and 1800 using a Beckman Optima XL-80 with a 50.2 Ti rotor. Centrifuged at 4 rpm for 15 minutes.
- the target band stained white at around 56 kD was cut out with a cutter knife, and the band was further finely cut with a cutter knife.
- the HRP I partial protein prepared in Example 14 was prepared as "Antibodies ALaboratooryManual” (ColdSprong Harrbor
- an anti-HRPI antibody was reacted with the partial HRPI protein or the full-length HRPI protein, respectively.
- a secondary antibody is reacted with anti-heron IgG antibody labeled with alkaline phosphatase, and the alkaline phosphatase is used as a substrate.
- liver cancer tissue lg prepared in Example 1 was homogenized with 5 ml of 2 ⁇ SDS samp 1 ebuffer, and then boiled for 3 minutes to obtain a liver cancer tissue extract.
- the extract was subjected to 12.5% SDS-PAGE electrophoresis, and then subjected to ⁇ stan blot. The amount of protein was adjusted by staining the gel separately subjected to the same electrophoresis with Coomassie Priliant Blue, and then performing colorimetry.
- Example 17 Thereafter, the anti-HRPI antibody prepared in Example 17 was reacted with the extract.
- an anti-Egret IgG antibody labeled with alfa phosphatase is reacted, and the alkaline phosphatase is reacted with a substrate (NBT, BC ID (both manufactured by Puguchi Mega)) to produce color. (Fig. 15 [B]).
- NBT, BC ID both manufactured by Puguchi Mega
- the GAD II protein prepared in Example 16 was immunized to persimmons according to the method described in “Antibodies AL aboratory Manual” (Cold S prong Harbor Laboratory, 1988) chapter 5 to obtain anti- HRP I antibody was produced.
- Example 16 The GAD II protein produced and purified in Example 16 was subjected to Western blotting on a nylon membrane (Immobilon P (manufactured by Millipore)).
- liver cancer tissue (7 months after DEN administration) and the normal liver tissue prepared in Example 1 were homogenized with 5 ml of 2 x SDS sample buffer, respectively, and then boiled for 3 minutes. An extract was obtained.
- the anti-GAD I I antibody prepared in Example 19 was reacted with the extract.
- the secondary antibody was reacted with an alkaline phosphatase-labeled anti-Egret IgG antibody, and the alkaline phosphatase was reacted with a substrate (NBT, BC ID (both manufactured by Promega)) to develop color. .
- NBT NBT, BC ID (both manufactured by Promega)
- a significant increase in GADII protein was confirmed in liver cancer and in the process of developing liver cancer. That is, it was confirmed that the antibody was able to distinguish liver cancer from normal liver and between developing liver and normal liver, and was used for monitoring the development of liver cancer, early diagnosis of liver cancer, and the like.
- FIG. 16 shows the results of the HRPI gene probe
- FIG. 17 shows the results of the GADII gene probe.
- the HRP I gene is strongly expressed in liver and kidney, and is also expressed in lung.
- the GAD II gene is strongly expressed in the liver and Xu, and is also expressed in the lung, although the length varies.
- an anti-HRPI antibody or an anti-GADII antibody makes it possible to diagnose the onset of liver cancer immunohistologically.
- the gene, antisense gene of the gene, and application to liver cancer treatment using the antibody are expected.
- Pro Pro Gin Asn lie Phe Pro Trp lie Leu Thr Leu Leu Pro Leu Gin
- Sequence type nucleic acid
- Sequence type nucleic acid
- Glu Arg Gin lie Ser Leu Ala Glu Ala Glu Gly Ser Val Pro Phe Leu 225 230 235 240
- Gly Thr Met Met lie Gly Tyr Gin Pro His Gly Thr Arg Ala Asn Phe
- Sequence type nucleic acid
- Glu Arg Gin lie Gly Met Ala Glu Ala Glu Gly Ala Val Pro Phe Leu 225 230 235 240
- Gly Ser Met Met lie Gly Tyr Gin Pro His Gly Thr Arg Gly Asn Phe
- Sequence type nucleic acid
- G CCC CCGGCCG903 GCCGGACC ATCCG CAAT GGCGGAATA iTT 1TTATA--
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Description
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EP96930419A EP0857780A4 (en) | 1995-09-14 | 1996-09-17 | NEW PROTEINS EXCELLENTLY EXPECTED IN LIVER CANCER, GENES THAT ENCODE THESE PROTEINS, ANTIBODIES AGAINST AND SUITABLE METHODS |
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JP8/179885 | 1996-06-20 | ||
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Cited By (6)
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WO1999000495A1 (fr) * | 1997-06-26 | 1999-01-07 | Sumitomo Electric Industries, Ltd. | Nouvelle proteine ayant une excellente expression dans le cancer du sang, gene codant cette proteine, anticorps dirigee contre cette derniere et procede de detection de l'expression de cette proteine |
US5883245A (en) * | 1996-10-02 | 1999-03-16 | Orient Chemical Industries, Ltd. | Deodorizer consisting of metallophthalocyanine and process for preparing metallophthalocyanine |
WO1999041612A1 (en) * | 1998-02-13 | 1999-08-19 | Oxford Glycosciences (Uk) Ltd. | Methods and compositions for diagnosis of hepatoma |
WO1999057269A1 (fr) * | 1998-04-30 | 1999-11-11 | Sumitomo Electric Industries, Ltd. | Gene hrpi humain |
JPWO2005014818A1 (ja) * | 2003-08-08 | 2006-10-05 | 株式会社ペルセウスプロテオミクス | 癌高発現遺伝子 |
US7812128B2 (en) | 2003-08-08 | 2010-10-12 | Hiroyuki Aburatani | Gene overexpressed in cancer |
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CA2396062C (en) * | 1999-12-30 | 2009-11-17 | President And Fellows Of Harvard College | Methods and compositions relating to modulation of hepatocyte growth, plasma cell differentiation or t cell subset activity by modulation of xbp-1 activity |
US6974667B2 (en) * | 2000-06-14 | 2005-12-13 | Gene Logic, Inc. | Gene expression profiles in liver cancer |
US8940479B2 (en) | 2008-01-14 | 2015-01-27 | Cornell University | Methods for modulating de novo hepatic lipogenesis by modulating XBP-1 activity |
WO2012109238A2 (en) | 2011-02-07 | 2012-08-16 | President And Fellows Of Harvard College | Methods for increasing immune responses using agents that directly bind to and activate ire-1 |
WO2013134774A1 (en) | 2012-03-09 | 2013-09-12 | Cornell University | Modulation of breast cancer growth by modulation of xbp1 activity |
EP3049521B1 (en) | 2013-09-25 | 2019-03-06 | Cornell University | Compounds for inducing anti-tumor immunity and methods thereof |
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JPH09203734A (ja) * | 1996-01-26 | 1997-08-05 | Sumitomo Electric Ind Ltd | 抗血清、抗体、リガンド及びそれらの検出方法 |
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BIOCHEM. BIOPHYS. ACTA (1996, Jun.), Vol. 1307, REYMOND, I. et al., "Molecular Cloning and Sequence Analysis of the cDNA Encoding Rat Liver Cysteine Sulfinate Decarboxylase (CSD)", p. 152-156. * |
BIOCHEM. BIOPHYS. RES. COMMUN., (1996, Jun.), Vol. 223, KISHIMOTO, T. et al., "HTF:A B-ZIP Transcription Factor that is Closely Related to the Human XBP/TREB5 and is Activated by Hepatocelluar Carcinoma in Rats", p. 746-751. * |
CANCER RES. (1996, Nov.), Vol. 56, No. 22, KISHIMOTO, T. et al., "Overexpression of Cysteine Sulfinic Acid Decarboxylase Stimulated by Hepatocarcinogenesis Results in Autoantibody Production in Rats", p. 5230-5237. * |
See also references of EP0857780A4 * |
Cited By (9)
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US5883245A (en) * | 1996-10-02 | 1999-03-16 | Orient Chemical Industries, Ltd. | Deodorizer consisting of metallophthalocyanine and process for preparing metallophthalocyanine |
WO1999000495A1 (fr) * | 1997-06-26 | 1999-01-07 | Sumitomo Electric Industries, Ltd. | Nouvelle proteine ayant une excellente expression dans le cancer du sang, gene codant cette proteine, anticorps dirigee contre cette derniere et procede de detection de l'expression de cette proteine |
WO1999041612A1 (en) * | 1998-02-13 | 1999-08-19 | Oxford Glycosciences (Uk) Ltd. | Methods and compositions for diagnosis of hepatoma |
WO1999057269A1 (fr) * | 1998-04-30 | 1999-11-11 | Sumitomo Electric Industries, Ltd. | Gene hrpi humain |
JPWO2005014818A1 (ja) * | 2003-08-08 | 2006-10-05 | 株式会社ペルセウスプロテオミクス | 癌高発現遺伝子 |
US7812128B2 (en) | 2003-08-08 | 2010-10-12 | Hiroyuki Aburatani | Gene overexpressed in cancer |
JP4643450B2 (ja) * | 2003-08-08 | 2011-03-02 | 株式会社ペルセウスプロテオミクス | 癌高発現遺伝子 |
US9376475B2 (en) | 2003-08-08 | 2016-06-28 | Hiroyuki Aburatani | Gene overexpressed in cancer |
US9434775B2 (en) | 2003-08-08 | 2016-09-06 | Hiroyuki Aburatani | Gene overexpressed in cancer |
Also Published As
Publication number | Publication date |
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EP0857780A4 (en) | 2001-12-05 |
EP0857780A1 (en) | 1998-08-12 |
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