WO2021172000A1 - 卵巣悪性腫瘍の検出方法及び検出試薬 - Google Patents
卵巣悪性腫瘍の検出方法及び検出試薬 Download PDFInfo
- Publication number
- WO2021172000A1 WO2021172000A1 PCT/JP2021/004736 JP2021004736W WO2021172000A1 WO 2021172000 A1 WO2021172000 A1 WO 2021172000A1 JP 2021004736 W JP2021004736 W JP 2021004736W WO 2021172000 A1 WO2021172000 A1 WO 2021172000A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tfpi2
- ovarian
- antibody
- cancer
- amount
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 114
- 206010033128 Ovarian cancer Diseases 0.000 title claims abstract description 69
- 239000003153 chemical reaction reagent Substances 0.000 title claims abstract description 43
- 201000008016 ovarian benign neoplasm Diseases 0.000 claims abstract description 44
- 206010004433 Benign ovarian tumour Diseases 0.000 claims abstract description 43
- 108090000765 processed proteins & peptides Proteins 0.000 claims abstract description 18
- 229920001184 polypeptide Polymers 0.000 claims abstract description 13
- 102000004196 processed proteins & peptides Human genes 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 4
- 101000835083 Homo sapiens Tissue factor pathway inhibitor 2 Proteins 0.000 claims abstract 10
- 102100026134 Tissue factor pathway inhibitor 2 Human genes 0.000 claims abstract 10
- 206010028980 Neoplasm Diseases 0.000 claims description 132
- 201000011510 cancer Diseases 0.000 claims description 58
- 238000005259 measurement Methods 0.000 claims description 47
- 230000002611 ovarian Effects 0.000 claims description 33
- 230000036210 malignancy Effects 0.000 claims description 25
- 206010061535 Ovarian neoplasm Diseases 0.000 claims description 23
- 150000001413 amino acids Chemical group 0.000 claims description 12
- 239000000439 tumor marker Substances 0.000 claims description 12
- 230000000890 antigenic effect Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 11
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 8
- 235000003704 aspartic acid Nutrition 0.000 claims description 8
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 8
- 235000018417 cysteine Nutrition 0.000 claims description 8
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 claims description 8
- HNDVDQJCIGZPNO-UHFFFAOYSA-N histidine Natural products OC(=O)C(N)CC1=CN=CN1 HNDVDQJCIGZPNO-UHFFFAOYSA-N 0.000 claims description 8
- 238000004949 mass spectrometry Methods 0.000 claims description 7
- 208000004548 serous cystadenocarcinoma Diseases 0.000 abstract description 3
- 102000055046 tissue-factor-pathway inhibitor 2 Human genes 0.000 description 153
- 108010016054 tissue-factor-pathway inhibitor 2 Proteins 0.000 description 153
- 239000000523 sample Substances 0.000 description 41
- 210000004027 cell Anatomy 0.000 description 26
- 210000004369 blood Anatomy 0.000 description 12
- 239000008280 blood Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 11
- 108090000623 proteins and genes Proteins 0.000 description 9
- 102000004169 proteins and genes Human genes 0.000 description 9
- 102000004190 Enzymes Human genes 0.000 description 8
- 108090000790 Enzymes Proteins 0.000 description 8
- 235000018102 proteins Nutrition 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 8
- 102000002260 Alkaline Phosphatase Human genes 0.000 description 7
- 108020004774 Alkaline Phosphatase Proteins 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000003018 immunoassay Methods 0.000 description 6
- 230000003211 malignant effect Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 239000000427 antigen Substances 0.000 description 5
- 102000036639 antigens Human genes 0.000 description 5
- 108091007433 antigens Proteins 0.000 description 5
- 230000027455 binding Effects 0.000 description 5
- 239000007853 buffer solution Substances 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 5
- 210000004408 hybridoma Anatomy 0.000 description 5
- 210000002966 serum Anatomy 0.000 description 5
- HSHNITRMYYLLCV-UHFFFAOYSA-N 4-methylumbelliferone Chemical compound C1=C(O)C=CC2=C1OC(=O)C=C2C HSHNITRMYYLLCV-UHFFFAOYSA-N 0.000 description 4
- 101000955067 Homo sapiens WAP four-disulfide core domain protein 2 Proteins 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 4
- 102100038965 WAP four-disulfide core domain protein 2 Human genes 0.000 description 4
- 238000011088 calibration curve Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003550 marker Substances 0.000 description 4
- 210000001672 ovary Anatomy 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 239000012503 blood component Substances 0.000 description 3
- 238000009534 blood test Methods 0.000 description 3
- 238000002059 diagnostic imaging Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000003053 immunization Effects 0.000 description 3
- 230000036244 malformation Effects 0.000 description 3
- 210000004379 membrane Anatomy 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 210000002381 plasma Anatomy 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 description 2
- BCHIXGBGRHLSBE-UHFFFAOYSA-N (4-methyl-2-oxochromen-7-yl) dihydrogen phosphate Chemical compound C1=C(OP(O)(O)=O)C=CC2=C1OC(=O)C=C2C BCHIXGBGRHLSBE-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 201000000274 Carcinosarcoma Diseases 0.000 description 2
- 206010008342 Cervix carcinoma Diseases 0.000 description 2
- 206010014733 Endometrial cancer Diseases 0.000 description 2
- 206010014759 Endometrial neoplasm Diseases 0.000 description 2
- 201000009273 Endometriosis Diseases 0.000 description 2
- 201000008808 Fibrosarcoma Diseases 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 101000653189 Homo sapiens Tissue factor pathway inhibitor Proteins 0.000 description 2
- 108010038807 Oligopeptides Proteins 0.000 description 2
- 102000015636 Oligopeptides Human genes 0.000 description 2
- 108010033276 Peptide Fragments Proteins 0.000 description 2
- 102000007079 Peptide Fragments Human genes 0.000 description 2
- 229940124158 Protease/peptidase inhibitor Drugs 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 2
- 102000007056 Recombinant Fusion Proteins Human genes 0.000 description 2
- 108010008281 Recombinant Fusion Proteins Proteins 0.000 description 2
- 102100030951 Tissue factor pathway inhibitor Human genes 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- 208000006105 Uterine Cervical Neoplasms Diseases 0.000 description 2
- AWUCVROLDVIAJX-UHFFFAOYSA-N alpha-glycerophosphate Natural products OCC(O)COP(O)(O)=O AWUCVROLDVIAJX-UHFFFAOYSA-N 0.000 description 2
- 210000003719 b-lymphocyte Anatomy 0.000 description 2
- 238000001574 biopsy Methods 0.000 description 2
- 208000002458 carcinoid tumor Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 201000010881 cervical cancer Diseases 0.000 description 2
- 238000010219 correlation analysis Methods 0.000 description 2
- 239000012228 culture supernatant Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 210000002308 embryonic cell Anatomy 0.000 description 2
- 230000001605 fetal effect Effects 0.000 description 2
- 238000002875 fluorescence polarization Methods 0.000 description 2
- 238000002649 immunization Methods 0.000 description 2
- 230000002163 immunogen Effects 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 210000004962 mammalian cell Anatomy 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000137 peptide hydrolase inhibitor Substances 0.000 description 2
- 102000013415 peroxidase activity proteins Human genes 0.000 description 2
- 108040007629 peroxidase activity proteins Proteins 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 125000002345 steroid group Chemical group 0.000 description 2
- 208000028210 stromal sarcoma Diseases 0.000 description 2
- 238000004885 tandem mass spectrometry Methods 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- WRGQSWVCFNIUNZ-GDCKJWNLSA-N 1-oleoyl-sn-glycerol 3-phosphate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)COP(O)(O)=O WRGQSWVCFNIUNZ-GDCKJWNLSA-N 0.000 description 1
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- 102000009027 Albumins Human genes 0.000 description 1
- 241001156002 Anthonomus pomorum Species 0.000 description 1
- 206010003445 Ascites Diseases 0.000 description 1
- 108090001008 Avidin Proteins 0.000 description 1
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 1
- 208000007690 Brenner tumor Diseases 0.000 description 1
- 241000282693 Cercopithecidae Species 0.000 description 1
- 241000699802 Cricetulus griseus Species 0.000 description 1
- 208000007033 Dysgerminoma Diseases 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 101000623901 Homo sapiens Mucin-16 Proteins 0.000 description 1
- 108060003951 Immunoglobulin Proteins 0.000 description 1
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 206010027476 Metastases Diseases 0.000 description 1
- 102100023123 Mucin-16 Human genes 0.000 description 1
- KUIFHYPNNRVEKZ-VIJRYAKMSA-N O-(N-acetyl-alpha-D-galactosaminyl)-L-threonine Chemical compound OC(=O)[C@@H](N)[C@@H](C)O[C@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1NC(C)=O KUIFHYPNNRVEKZ-VIJRYAKMSA-N 0.000 description 1
- RMINQIRDFIBNLE-NNRWGFCXSA-N O-[N-acetyl-alpha-neuraminyl-(2->6)-N-acetyl-alpha-D-galactosaminyl]-L-serine Chemical compound O1[C@H](OC[C@H](N)C(O)=O)[C@H](NC(=O)C)[C@@H](O)[C@@H](O)[C@H]1CO[C@@]1(C(O)=O)O[C@@H]([C@H](O)[C@H](O)CO)[C@H](NC(C)=O)[C@@H](O)C1 RMINQIRDFIBNLE-NNRWGFCXSA-N 0.000 description 1
- 241000283973 Oryctolagus cuniculus Species 0.000 description 1
- 206010035226 Plasma cell myeloma Diseases 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 108010026552 Proteome Proteins 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 101100221606 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) COS7 gene Proteins 0.000 description 1
- 108050000761 Serpin Proteins 0.000 description 1
- 102000008847 Serpin Human genes 0.000 description 1
- 208000024770 Thyroid neoplasm Diseases 0.000 description 1
- 101710120037 Toxin CcdB Proteins 0.000 description 1
- 102000004338 Transferrin Human genes 0.000 description 1
- 108090000901 Transferrin Proteins 0.000 description 1
- 238000001042 affinity chromatography Methods 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 238000012870 ammonium sulfate precipitation Methods 0.000 description 1
- 210000004102 animal cell Anatomy 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 229960002685 biotin Drugs 0.000 description 1
- 235000020958 biotin Nutrition 0.000 description 1
- 239000011616 biotin Substances 0.000 description 1
- 201000000053 blastoma Diseases 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000601 blood cell Anatomy 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 229940098773 bovine serum albumin Drugs 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 210000001175 cerebrospinal fluid Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000004252 chorionic villi Anatomy 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002299 complementary DNA Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000013211 curve analysis Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002651 drug therapy Methods 0.000 description 1
- 201000008184 embryoma Diseases 0.000 description 1
- 239000013604 expression vector Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 229930182830 galactose Natural products 0.000 description 1
- 238000002523 gelfiltration Methods 0.000 description 1
- 230000000762 glandular Effects 0.000 description 1
- 208000003064 gonadoblastoma Diseases 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 102000018358 immunoglobulin Human genes 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 210000003292 kidney cell Anatomy 0.000 description 1
- 238000004989 laser desorption mass spectroscopy Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 1
- 108010026228 mRNA guanylyltransferase Proteins 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000001840 matrix-assisted laser desorption--ionisation time-of-flight mass spectrometry Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000005906 menstruation Effects 0.000 description 1
- 201000008806 mesenchymal cell neoplasm Diseases 0.000 description 1
- 230000009401 metastasis Effects 0.000 description 1
- 229930182817 methionine Natural products 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 201000000050 myeloid neoplasm Diseases 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009871 nonspecific binding Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 206010034260 pelvic mass Diseases 0.000 description 1
- 239000003330 peritoneal dialysis fluid Substances 0.000 description 1
- 206010034674 peritonitis Diseases 0.000 description 1
- 239000008055 phosphate buffer solution Substances 0.000 description 1
- 210000002826 placenta Anatomy 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 102000040430 polynucleotide Human genes 0.000 description 1
- 108091033319 polynucleotide Proteins 0.000 description 1
- 239000002157 polynucleotide Substances 0.000 description 1
- 230000004481 post-translational protein modification Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004007 reversed phase HPLC Methods 0.000 description 1
- 230000003248 secreting effect Effects 0.000 description 1
- 239000003001 serine protease inhibitor Substances 0.000 description 1
- 208000028467 sex cord-stromal tumor Diseases 0.000 description 1
- 235000020183 skimmed milk Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 210000002536 stromal cell Anatomy 0.000 description 1
- 238000002198 surface plasmon resonance spectroscopy Methods 0.000 description 1
- 238000001920 surface-enhanced laser desorption--ionisation mass spectrometry Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 208000013076 thyroid tumor Diseases 0.000 description 1
- 239000012581 transferrin Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- G01N33/57449—Specifically defined cancers of ovaries
-
- 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
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/46—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from vertebrates
- G01N2333/47—Assays involving proteins of known structure or function as defined in the subgroups
- G01N2333/4701—Details
- G01N2333/4703—Regulators; Modulating activity
- G01N2333/4704—Inhibitors; Supressors
-
- 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
- G01N2333/81—Protease inhibitors
- G01N2333/8107—Endopeptidase (E.C. 3.4.21-99) inhibitors
- G01N2333/811—Serine protease (E.C. 3.4.21) inhibitors
- G01N2333/8114—Kunitz type inhibitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/56—Staging of a disease; Further complications associated with the disease
Definitions
- the present invention relates to a method for detecting an ovarian malignant tumor and a reagent for detecting tissue factor pathway inhibitor 2 (Tissue Factor Pathway Inhibitor 2; TFPI2).
- tissue factor pathway inhibitor 2 Tissue Factor Pathway Inhibitor 2; TFPI2
- Ovarian cancer is estimated to be about 280,000 new cases worldwide and about 10,000 in Japan (GLOBOCAN 2018), and is the most deadly cancer among gynecologic malignancies.
- the current diagnosis of ovarian cancer is mainly based on diagnostic imaging and CA125, and malignant / benign is estimated by blood tests using multiple markers such as CA19-9. Diagnosis is being carried out.
- CA125 which is a typical ovarian cancer marker, has excellent sensitivity in detecting ovarian cancer, it may vary significantly even in benign tumors including menstruation, peritonitis, and endometriosis.
- HE4 Human epididymis protein 4
- CA125 Human epididymis protein 4
- HE4 and CA125 have a low correlation, benign and malignant discrimination accuracy in ovarian tumors can be obtained by obtaining an estimated ovarian malignant tumor (Risk of Ovarian Malignancy Algorithm: ROMA) from the measured values of both markers and menopausal information. Is further improved (Non-Patent Document 1).
- Tissue factor pathway inhibitor 2 (TFPI2) is a placenta-derived serpin protease inhibitor that is the same protein as placental protein 5 (PP5) and contains three Knitz-type protease inhibitor domains. It was clarified that TFPI2 is specifically produced from a clear cell cancer cell line in an ovarian cancer cell line, and that gene expression in a tissue of an ovarian cancer patient is specifically improved only in a clear cell cancer patient (Patent Document 1). A method for detecting clear cell ovarian cancer by measuring medium TFPI2 has been disclosed (Patent Documents 2 and 3, Non-Patent Documents 2 and 3).
- HGSC high-grade serous carcinoma
- TFPI2 TFPI2 has been reported (Non-Patent Document 4).
- TFPI2 it has been unclear whether TFPI2 can be applied to distinguish between ovarian malignancies with diverse histological types, including borderline malignancies, and benign ovarian tumors.
- An object of the present invention is to provide a method for differentiating and detecting an ovarian malignant tumor from a benign ovarian tumor and a reagent that can be used for the method.
- the present inventors have diligently studied and found that the blood TFPI2 level is significantly improved in ovarian malignant tumor patients as compared with ovarian benign tumor patients, and that TFPI2 can detect ovarian malignant tumors with high specificity.
- the present invention includes the following aspects.
- [1] A method for differentiating and detecting an ovarian malignant tumor (excluding highly atypical serous cancer) from a benign ovarian tumor, which comprises measuring the amount of TFPI2 in a sample.
- the method according to [1] wherein an ovarian malignant tumor (excluding highly atypical serous cancer) is detected when the measured value of the TFPI2 amount exceeds a preset reference value.
- [3] The method according to [1] or [2], wherein the amount of TFPI2 is the sum of the amount of TFPI2 processing polypeptide and the amount of intact TFPI2.
- [5] The method according to [4], wherein the antibody is an antibody that recognizes Kunitz domain 1 of TFPI2.
- [6] The method according to any one of [1] to [3], wherein the measurement is performed using a mass spectrometry method.
- the present invention provides a method for distinguishing an ovarian malignant tumor from a benign ovarian tumor and detecting it easily and with high accuracy, and a reagent that can be used for the method.
- the vertical axis represents the amount of TFPI2 or CA125 in blood.
- the vertical axis represents the CA125 measured value
- the horizontal axis represents the TFPI2 measured value.
- the vertical axis represents the amount of TFPI2 or CA125 in blood.
- the vertical axis represents the CA125 measured value
- the horizontal axis represents the TFPI2 measured value.
- a method for differentiating and detecting an ovarian malignant tumor of the present invention (excluding highly atypical serous cancer) from a benign ovarian tumor
- the first aspect of the present invention is an ovarian malignant tumor (however, highly atypical). It is a method for differentiating and detecting a benign ovarian tumor (excluding precervical cancer), and includes measuring the amount of TFPI2 in a sample. This is a method based on the increased presence of TFPI2 in biological samples such as blood of ovarian malignancies as compared to benign ovarian tumors. Measurement of the amount of TFPI2 in a sample is usually performed in vitro.
- an ovarian malignant tumor can be differentiated from a benign ovarian tumor and detected with high specificity.
- the method of the present invention includes the stage of differentiating and detecting an ovarian malignant tumor from a benign ovarian tumor, and does not include a final judgment act regarding the diagnosis of the ovarian malignant tumor.
- the doctor diagnoses an ovarian malignant tumor and formulates a treatment policy by referring to the detection results by the method of the present invention.
- the ovarian malignant tumor detected in the present invention refers to a malignant tumor and a borderline malignant tumor, and various tumors contained therein are targeted, and are not particularly limited except for highly atypical serous cancer.
- Malignant tumors include non-invasive low-grade serous cancer, low-grade serous cancer, mucinous cancer, endometrioid cancer, clear cell cancer, malignant Brenner tumor, serous mucinous cancer, and undifferentiated cancer (low atypia).
- Epithelial tumors such as degree intimal stromal sarcoma, highly atypical degree intimal stromal sarcoma), mixed epithelial mesenchymal tumors (carcinosarcoma / carcinosarcoma); pure stromal tumors (rich cell fibers) Sexual cord stromal such as tumor, fibrosarcoma, malignant steroid cell tumor), pure type cord tumor (adult type granule membrane cell tumor, juvenile granule membrane cell tumor, Sertri cell tumor, sex cord tumor with cricoid tubules) Tumors; mixed sex cord interstitial tumors such as Sertri-Lommetial tumors and other sex cord interstitial tumors; undifferentiated embryonic cell tumors / disgerminoma / egg sac tumors, germogenic cancers (fetal cancers) ) ⁇ Multi-embryonic tumor ⁇ Immature malformation (G3) ⁇ Mature malformation with malignant addition Embroidered tumor
- clear cell cancer, low-grade serous cancer, endometrial cancer and mucinous cancer are preferable examples. Further, clear cell cancer, endometrial cancer and mucinous cancer are given as more preferable examples. Borderline malignant tumors include serous, mucinous, intimal, clear cell, glandular fibrous, superficial papillary, Brenner's tumors, serous mucinous and other epithelial; granules with serous and micropapillary patterns.
- stromal tumors such as membrane cells, Sertri / stromal cell tumors (medium differentiated type), steroid cell tumors (unclassifiable type), ginando blastoma; immature malformations (G1, G2), carcinoids, thyroid tumors Embryonic cell tumors such as sex carcinoids; gonad blastoma (pure type); etc.
- the TFPI2 measured in the present invention is not particularly limited, and may be, for example, intact TFPI2 (hereinafter, also referred to as “I-TFPI2”), TFPI2 processing polypeptide (hereinafter, also referred to as “NT-TFPI2”), or both. There may be.
- SEQ ID NO: 1 shows the amino acid sequence based on the cDNA of human TFPI2.
- the signal peptide from the starting methionine to the glycine at the 22nd residue is a signal peptide.
- “Intact TFPI2” refers to a peptide represented by residues 23 to 235 of the amino acid sequence of SEQ ID NO: 1.
- NT-TFPI2 refers to a peptide fragment containing Knitz domain 1 located on the N-terminal side of intact TFPI2, as described in Patent Document 3. More specifically, NT-TFPI2 is a peptide containing at least the sequence from aspartic acid at the 23rd residue of the amino acid sequence of SEQ ID NO: 1 to histidine at the 131st residue or cysteine at the 130th residue, or the above-mentioned peptide. A peptide containing an amino acid sequence having 80% or more identity with the sequence. The identity is preferably 90% or more, more preferably 95% or more.
- this polypeptide may be a polypeptide consisting of an amino acid sequence in which one or several amino acids are deleted, substituted, inserted, and / or added in the above sequence.
- the number is preferably 2 to 20, more preferably 2 to 10, and even more preferably 2 to 5.
- other peptide fragments may be provided on both sides of the sequence, it is preferable that the antibody does not have an antigenic determinant (epitope) for an antibody that recognizes the Knitz domain 3 of TFPI2.
- test sample examples include blood components such as whole blood, blood cells, serum, and plasma, cell or tissue extract, urine, cerebrospinal fluid, peritoneal lavage fluid, and ascites.
- the ovarian tissue biopsy sample may be the test target, in which case the extract or culture supernatant of the biopsy sample is measured.
- a body fluid such as a blood component or urine as a sample because it can be performed easily and non-invasively.
- the blood component is used as a sample. Is particularly preferable.
- the dilution ratio of the sample may be appropriately selected from undiluted to 100-fold dilution according to the type and condition of the sample to be used.
- a method for detecting TFPI2 and another tumor marker for ovarian cancer (ovarian other than TFPI2). It may be used in combination with a method for detecting a cancer marker, also referred to as "another ovarian cancer marker").
- the combination is not particularly limited.
- the method of detecting TFPI2 and the method of detecting other ovarian cancer markers are performed simultaneously or separately to detect ovarian malignancies (excluding high-grade serous cancer). How to distinguish and detect benign ovarian tumors, (B) A method of first detecting TFPI2 is applied to a sample to be measured, and another ovarian cancer marker is detected in a sample determined to be negative as a result.
- Ovarian malignant tumor (however, highly atypical) A method for differentiating and detecting benign ovarian tumors (excluding cervical cancer), (C) A method of first detecting another ovarian cancer marker is applied to a sample to be measured, and then a method of detecting TFPI2 is applied to a sample judged to be negative as a result.
- a method for differentiating and detecting benign ovarian tumors (excluding cervical cancer) is preferable in that the reagent used for detection is not wasted.
- ovarian cancer markers which are detected by a method for differentiating and detecting an ovarian malignant tumor (excluding highly atypical serous cancer) of the present invention from a benign ovarian tumor, are appropriately selected from conventionally known markers.
- cancer antigen 125 Cancer Antique 125, CA125
- cancer antigen 546 CA546
- cancer antigen 72-4 CA72-4
- cancer antigen 130 CA130
- cancer antigen 602 CA602
- Sialyl Tn antigen Siallyl Tn antigen, SLN
- cancer-related galactose metastasis enzyme Galactosyltransphase Assisted with Tumor, GAT
- lysophosphatidic acid LisoPhosphatidic Acid4epid, LPA
- CA125 which is the most widely used marker for other ovarian cancers, has established clinical usefulness, and thus treats ovarian malignancies of the present invention (excluding high-grade serous cancer) in the ovary. It is preferred as another ovarian cancer marker used in a method of differentiating and detecting benign tumors. Further, even if only one other ovarian cancer marker is detected in the method for differentiating and detecting an ovarian malignant tumor (excluding high-grade serous cancer) of the present invention from a benign ovarian tumor. Well, there may be two or more.
- the time for collecting the sample in the present invention is not particularly limited. For example, it may be anytime from preoperative time when a pelvic mass is confirmed by diagnostic imaging etc. and a detailed examination is performed because it is suspected to be an ovarian malignant tumor, to follow-up after a definitive diagnosis of ovarian malignant tumor by postoperative pathological examination. Any sample collected at any stage, such as before and after a definitive diagnosis and before and after the start of treatment, can be used in the method of the present invention.
- the TFPI2 amount may be any of the intact TFPI2 amount, the NT-TFPI2 amount, or the total of the intact TFPI2 amount and the NT-TFPI2 amount, but the total of the intact TFPI2 amount and the NT-TFPI2 amount is sufficient for ease of measurement. It is more preferable from the viewpoint of compatibility with high sensitivity and specificity.
- the reference value used for the determination may be either a measured value or a converted concentration value.
- the converted concentration value refers to a value converted from a measured value based on a calibration curve prepared using TFPI2 as a standard sample.
- the standard value (Cutoff value) for distinguishing ovarian malignancies (excluding highly atypical serous cancers) from benign ovarian tumors is ovarian benign tumors and ovarian malignancies (excluding highly atypical serous tumors). Can be appropriately set to the measured values indicating the optimum sensitivity and specificity by measuring the receiver operating characteristic (ROC) curve analysis.
- ROC receiver operating characteristic
- the amount of NT-TFPI2 or the amount of intact TFPI2 in the sample may be measured individually, or the values may be summed to obtain the total amount.
- the total amount of NT-TFPI2 and intact TFPI2 in the sample may be measured by a measuring system capable of measuring the total amount at one time.
- the NT-TFPI2 amount may be indirectly measured from the total amount obtained by both measurements and the measured amount of intact TFPI2 alone.
- the method for measuring the amount of NT-TFPI2 and / or the amount of intact TFPI2 is not particularly limited. For example, a method using an antigen-antibody reaction using an antibody that recognizes NT-TFPI2 and / or intact TFPI2, and a method using mass spectrometry can be exemplified.
- A A competitive method using a labeled measurement target and an antibody that recognizes the measurement target, and utilizing that the labeled measurement target and the measurement target contained in the sample competitively bind to the antibody.
- B A method using surface plasmon resonance in which a sample is brought into contact with a chip on which an antibody that recognizes an antibody to be measured is immobilized, and a signal that depends on the binding between the antibody and the measurement target is detected.
- C A fluorescence polarization immunoassay method utilizing an antibody that recognizes a fluorescence-labeled measurement target and increasing the degree of fluorescence polarization by binding the antibody to the measurement target.
- (D) A sandwich method in which two types of antibodies having different epitopes, one of which recognizes a measurement target (one of which is a labeled antibody), is used to form a complex of the two antibodies and the measurement target.
- (E) A method in which a measurement target in a sample is concentrated with an antibody that recognizes the measurement target as a pretreatment, the measurement target is separated from the antibody, and the measurement target is detected by a mass spectrometer or the like.
- the methods (d) and (e) are simple and highly versatile, the method (d) is more preferable in treating a large number of samples because the techniques related to reagents and devices are sufficiently established.
- a method for measuring the total amount of NT-TFPI2 and intact TFPI2 using an antibody that recognizes both NT-TFPI2 and intact TFPI2 (NT + I-TFPI2 measurement system).
- Antibodies that recognize both NT-TFPI2 and intact TFPI2 are from aspartic acid at the 23rd residue of the TFPI2 amino acid sequence represented by SEQ ID NO: 1 to histidine at the 131st residue or cysteine at the 130th residue.
- An antibody that binds to an antigenic determinant in the region of TFPI2 is preferable, and an antibody that recognizes Knitz domain 1 of TFPI2 as an antigenic determinant is more preferable.
- the sandwich method described above usually two types of antibodies having different epitopes are used.
- (B) A method for measuring the amount of intact TFPI2 alone using an antibody that does not recognize NT-TFPI2 but recognizes intact TFPI2 (I-TFPI2 measurement system).
- the antibody that does not recognize NT-TFPI2 but recognizes the epitope TFPI2 is preferably an antibody that recognizes the Knitz domain 3 of TFPI2 as an antigenic determinant.
- the sandwich method described above usually, the antibody uses two types having different epitopes, and at least one type uses an antibody that does not recognize NT-TFPI2 but recognizes intact TFPI2, and the other.
- the type may be an antibody that does not recognize NT-TFPI2 and recognizes an epitope TFPI2, or an antibody that recognizes both NT-TFPI2 and an epitope TFPI2.
- NT-TFPI2 by subtracting the amount of intact TFPI2 measured by the I-TFPI2 measurement system of (B) from the total amount of NT-TFPI2 and intact TFPI2 measured by the NT + I-TFPI2 measurement system of (A).
- D A method for measuring the amount of NT-TFPI2 alone using an antibody that does not recognize intact TFPI2 but recognizes NT-TFPI2.
- the antibody that recognizes NT-TFPI2 without recognizing the intact TFPI2 include an antibody that specifically recognizes the peptide sequence at the C-terminal portion of NT-TFPI2.
- the sandwich method described above for example, the antibody is used as a solid phase antibody, and the antibody that recognizes Kunitz domain 1 as an antigenic determinant is used as a detection antibody.
- NT-TFPI2 measured by the methods (C) and (D) described above A single amount may be used as a criterion for judgment, but sufficient sensitivity and specificity can be obtained even if the total amount of NT-TFPI2 and intact TFPI2 measured by the method (A) is used as a criterion for judgment. The latter is more preferable because it is easy to obtain an antibody and measurement is easy in one step.
- Antibodies that recognize NT-TFPI2 and / or intact TFPI2 are oligopeptides consisting of NT-TFPI2 polypeptides or proteins, intact TFPI2 polypeptides or TFPI2 protein partial regions, NT-TFPI2 polypeptides or TFPI2 protein intact or partial regions. It can be obtained by immunizing an animal using a polypeptide or the like encoding the above as an immunogen.
- the protein or the oligopeptide or polypeptide does not reflect the three-dimensional structure of TFPI2 in vivo, or its structure may change during the preparation process.
- the obtained antibody may not have high specificity or binding force to the desired in vivo TFPI2, and even if a measurement system is constructed using this antibody, it is contained in the sample as a result. It may not be possible to accurately quantify the TFPI2 concentration.
- the intact or partial region of the TFPI2 polypeptide or intact TFPI2 protein is expressed in the body of an immune animal. It is more preferable because an antibody having high specificity and binding force (that is, high affinity) to TFPI2 in a sample can be obtained because an immune response is elicited.
- the animal used for immunization is not particularly limited as long as it has an antibody-producing ability, and may be a mammal normally used for immunization such as a mouse, a rat or a rabbit, or a bird such as a chicken.
- TFPI1 known as a homologue of TFPI2 is also present in the blood. Therefore, it is desirable to use an antibody that specifically recognizes only TFPI2 without crossing with TFPI1.
- the antibody that recognizes TFPI2 may be a monoclonal antibody or a polyclonal antibody, but a monoclonal antibody is preferable.
- the establishment of hybridoma cells that produce an antibody that recognizes TFPI2 may be appropriately selected from the methods for which techniques have been established. As an example, selection of hybridoma cells in which B cells are collected from an animal immunized by the method described above, the B cells and myeloma cells are fused electrically or in the presence of polyethylene glycol, and a desired antibody is produced by a HAT medium. By monocloning the selected hybridoma cells by the limiting dilution method, hybridoma cells that produce a monoclonal antibody that recognizes TFPI2 can be established.
- the monoclonal antibody that recognizes TFPI2 used in the present invention may be selected based on the affinity for GPI (glycosylphospatidylinositol) anchor type TFPI2 or secretory type TFPI2 derived from the host expression system.
- the host is not particularly limited, and may be appropriately selected from microbial cells such as Escherichia coli and yeast, insect cells, and animal cells that are usually used by those skilled in the art for protein expression, but disulfide bonds or sugar chains are added. It is preferable to use a mammalian cell as a host, which can express a protein having a structure similar to that of the natural TFPI2 by post-translational modification such as. Examples of mammalian cells include conventionally used human fetal kidney-derived cells (HEK) 293T cell lines, monkey kidney cell COS7 strains, Chinese hamster ovary (CHO) cells, and cancer cells isolated from humans. Be done.
- HEK human fetal kidney-derived cells
- Purification of the antibody used in the present invention may be carried out by appropriately selecting from the methods for which the technique has been established. As an example, after culturing the antibody-producing hybridoma cells established by the method described above, the culture supernatant is collected, and if necessary, the antibody is concentrated by ammonium sulfate precipitation, and then protein A, protein G, protein L, etc. are fixed. The antibody can be purified by affinity chromatography and / or ion exchange chromatography using the proteinated carrier.
- the antibody purified by the above-mentioned method may be labeled with an enzyme such as peroxidase or alkaline phosphatase, and the technique for labeling has been sufficiently established. It may be done by using a method.
- a method of measuring the amount of TFPI2 by using the mass spectrometry method will be specifically described below.
- major proteins such as albumin, immunoglobulin, and transferrin, which are abundant in blood, are removed by Agent Human 14 or the like as a pretreatment step, and then further separated by ion exchange, gel filtration, reverse phase HPLC, or the like. It is preferable to draw.
- the measurements are tandem mass spectrometry (MS / MS), liquid chromatography / tandem mass spectrometry (LC / MS / MS), matrix-assisted laser desorption / ionization flight time mass spectrometry (matrix assisted laser destruction ionization time-of-fly mass spectrometry). , MALDI-TOF / MS), surface enhanced laser ionization mass spectrometry (SELDI-MS) and the like.
- the method of the present invention for differentiating and detecting an ovarian malignant tumor (excluding highly atypical serous cancer) from a benign ovarian tumor can be applied to a method for treating an ovarian malignant tumor. That is, according to the present invention, it is a method for treating an ovarian malignant tumor in a patient.
- a method is provided that includes (i) identifying a patient as having a measured value of TFPI2 amount exceeding a preset reference value, and (ii) treating the identified patient.
- the measurement of the amount of TFPI2 may be performed using an antibody that specifically recognizes NT-TFPI2 and / or intact TFPI2, or may be performed using a mass spectrometry method. good.
- Examples of the treatment in the step (ii) include surgical treatment, drug therapy, radiation therapy, and the like, but the treatment is not particularly limited.
- a reagent for differentiating and detecting an ovarian malignant tumor (excluding highly atypical serous cancer) of the present invention from a benign ovarian tumor The second aspect of the present invention is NT-TFPI2 and / or It is a reagent for differentiating and detecting an ovarian malignant tumor (excluding high-grade serous cancer) containing an antibody that recognizes intact TFPI2 from a benign ovarian tumor.
- an antibody that recognizes NT-TFPI2 and intact TFPI2 is more preferable.
- an antibody that binds to an antigenic determinant in the region from aspartic acid at the 23rd residue to histidine at the 131st residue or cysteine at the 130th residue of the amino acid sequence shown in SEQ ID NO: 1 is more preferable. ..
- the antibody contained in the reagent of the present invention may be the antibody itself, may be labeled, or may be immobilized on a solid phase.
- the reagent of the present invention can be prepared by the methods shown in (I) to (III) below.
- (I) First, of the two types of antibodies (hereinafter referred to as "antibody 1" and "antibody 2") that recognize TFPI2 and have different epitopes used in the sandwich method, antibody 1 is used as an immunoplate, magnetic particles, or the like.
- B / F (Bound / Free) is bound to a separable carrier.
- the bonding method may be a physical bond using a hydrophobic bond, or a chemical bond using a linker reagent capable of cross-linking between two substances.
- the surface of the carrier is blocked with bovine serum albumin, skim milk, a commercially available blocking agent for immunoassay, a chemically synthesized polymer for suppressing protein adsorption, or the like in order to avoid non-specific binding. This is used as the primary reagent.
- (III) Label the other antibody 2 and prepare a solution containing the obtained labeled antibody as a secondary reagent.
- Substances labeled with antibody 2 include enzymes such as peroxidase and alkaline phosphatase, fluorescent substances, chemical luminescent substances, substances that can be detected by a detector such as radioisotope, or substances that have a specific binding partner such as avidin to biotin. Etc. are preferable.
- a buffer solution capable of performing an antigen-antibody reaction satisfactorily for example, a phosphate buffer solution, a Tris-HCl buffer solution, or the like is preferable.
- the reagent of the present invention produced in this manner may be freeze-dried if necessary.
- the antibody 1 is bound to the carrier in the same manner as in (I) to (II) described above to produce a blocking treatment, and the labeled antibody 2 is applied to the antibody-immobilized carrier.
- the reagent may be prepared by further adding the containing buffer solution.
- the methods shown in (IV) to (VI) below may be used.
- the primary reagent prepared in (II) and the sample are brought into contact with each other for a certain period of time at a certain temperature.
- the reaction conditions may be a temperature range of 4 ° C. to 40 ° C. for 5 to 180 minutes.
- the unreacted substance is removed by B / F separation, and then the secondary reagent prepared in (III) is brought into contact with the secondary reagent for a certain period of time at a certain temperature to form a sandwich complex.
- the reaction conditions may be a temperature range of 4 ° C.
- the amount of reagent components such as antibodies contained in the reagent of the present invention may be appropriately set according to various conditions such as the amount of sample, the type of sample, the type of reagent, and the measurement method. Specifically, for example, when 20 ⁇ L of serum or plasma is used as a sample and the amount of TFPI2 is measured by the sandwich method as described later, an antibody that binds 20 ⁇ L of the sample to a carrier per reaction system that reacts with the antibody. The amount may be 100 ng to 1000 ⁇ g and the labeled antibody amount may be 2 ng to 20 ⁇ g.
- the reagent of the present invention can also be used for measurement by a conventional method, and can also be used for measurement using an automatic immunodiagnosis device.
- measurement using an automatic immunodiagnosis device can be performed without being affected by intrinsic measurement interfering factors and competing enzymes contained in the sample, and TFPI2 in the sample can be quantified in a short time. ,preferable.
- Another aspect of the present invention is the manufacture of reagents for NT-TFPI2 and / or intact TFPI2 for differentiating and detecting ovarian malignancies (excluding highly atypical serous tumors) from benign ovarian tumors. It is used. Another aspect of the present invention is the use of NT-TFPI2 and / or intact TFPI2 in differentiating and detecting ovarian malignancies (excluding highly atypical serous cancers) from benign ovarian tumors. Another aspect of the invention is NT-TFPI2 and / or intact TFPI2, which is used to distinguish and detect ovarian malignancies (except for highly atypical serous tumors) from benign ovarian tumors. ..
- Another aspect of the present invention is for differentiating and detecting ovarian malignancies (excluding high-grade serous cancers) of antibodies that recognize NT-TFPI2 and / or intact TFPI2 from benign ovarian tumors. Use in the manufacture of reagents.
- Another aspect of the present invention is in differentiating and detecting ovarian malignancies (excluding high-grade serous cancers) of antibodies that recognize NT-TFPI2 and / or intact TFPI2 from benign ovarian tumors. It is used.
- Another aspect of the invention recognizes NT-TFPI2 and / or intact TFPI2, which is used to distinguish and detect ovarian malignancies (except for highly atypical serous tumors) from benign ovarian tumors. It is an antibody to be used.
- the antibody in these aspects is an antibody that binds to an antigenic determinant in the region from aspartic acid at the 23rd residue to histidine at the 131st residue or cysteine at the 130th residue of the amino acid sequence shown in SEQ ID NO: 1. Is preferable.
- TFPI2 measuring reagent was prepared as follows using the TFPI2 antibody obtained by the DNA immunoprescription method.
- An anti-TFPI2 monoclonal antibody (TS-TF04) was physically adsorbed on a water-insoluble ferrite-containing carrier at room temperature for a whole day and night so as to reach 100 ng / carrier, and then a 100 mM Tris buffer (pH 8.0) containing 1% BSA was added.
- TS-TF04 an anti-TFPI2 monoclonal antibody
- An alkaline phosphatase-labeled anti-TFPI2 antibody was prepared using an alkaline phosphatase labeling kit (manufactured by Dojin Chemical Co., Ltd.) using an anti-TFPI2 monoclonal antibody (TS-TF01).
- a TFPI2 measurement reagent was prepared by adding 100 ⁇ L of a solution (Tris buffer solution containing 3% BSA, pH 8.0) and freeze-drying. The prepared TFPI2 measurement reagent was sealed and sealed under nitrogen filling, and stored at 4 ° C. until measurement.
- Table 1 shows the breakdown of the clinical specimens used in this example. 33 cases of benign ovarian tumor serum and 38 cases of ovarian malignant tumor (excluding high-grade serous cancer) serum were collected by the same protocol at the Department of Obstetrics and Gynecology, Yokohama City University, and were informed outlets. Provided with consent and approval of the Yokohama City University Ethics Committee.
- a fully automatic enzyme immunoassay device AIA-2000 manufactured by Tosoh Corporation: Manufacturing and Sales Notification No. 13B3X90002000009 was used.
- the measurement of TFPI2 by the fully automatic enzyme immunoassay device AIA-2000 was carried out according to the following procedure. (1) 20 ⁇ L of the sample and 80 ⁇ L of the diluted solution containing the surfactant were automatically dispensed into the container containing the TFPI2 measurement reagent prepared in Example 1. (2) Perform an antigen-antibody reaction for 10 minutes at a constant temperature of 37 ° C. (3) After B / F separation, wash 8 times with a buffer solution containing a surfactant.
- a calibration curve was prepared using a commercially available TFPI2 recombinant protein (R & D) as a standard product, and the TFPI2 concentration in the sample was calculated.
- the CA125 was measured using the E-test TOSOHII CA125 measuring reagent (manufactured by Tosoh Corporation, approval number 20700AMZ00504000).
- FIG. 1 BoxPlot of blood TFPI2 value and blood CA125 measurement value is shown in FIG. Both TFPI2 and CA125 were found to be statistically significantly higher in ovarian malignancies (excluding highly atypical serous cancers) than in benign ovarian tumors (Man-Whitney). U test, p ⁇ 0.0001).
- the ROC analysis result is shown in FIG.
- the area under the curve (AUC) of TFPI2 is 0.7644
- the AUC of CA125 is 0.7699
- TFPI2 has good ovarian malignancies (excluding high-grade serous cancer) detection performance (excluding high-grade serous cancer) comparable to CA125. It was shown to have benign tumors and ovarian malignancies (excluding high-grade serous cancers).
- Example 3 Comparison of benign and malignant discrimination performance between TFPI2 and CA125
- the cutoff value (191 pg / mL) of TFPI2 is the concentration at which Youden index (specificity + sensitivity -1) is the maximum value from the ROC analysis result of Example 2. And said.
- the cutoff value (35 U / mL) used in clinical practice was used.
- Table 2 shows the discrimination performance (sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio) of each marker calculated using the 2 ⁇ 2 contingency table.
- TFPI2 has been shown to be superior in specificity, positive predictive value and positive likelihood ratio to CA125, while CA125 has been shown to be more sensitive than CA125.
- Example 4 Correlation analysis of TFPI2 and CA125 Based on the results of Example 2, the result of analyzing the correlation between TFPI2 and CA125 in benign ovarian tumors or malignant ovarian tumors (excluding high-grade serous cancer) Is shown in FIG. No significant correlation was found between TFPI2 and CA125 in either benign ovarian tumors or malignant ovarian tumors (excluding high-grade serous cancer), suggesting that they are independent indicators.
- Table 3 shows the breakdown of the clinical specimens used in this example. 77 cases of benign ovarian tumor serum and 274 cases of malignant ovarian tumor (excluding high-grade serous cancer) were samples collected by the same protocol at the Department of Obstetrics and Gynecology, Yokohama City University, and were informed outlets. Provided with consent and approval of the Yokohama City University Ethics Committee.
- a fully automatic enzyme immunoassay device AIA-900 manufactured by Tosoh Corporation, manufacturing and sales notification number: 13B3X9002002000122 was used.
- the measurement of TFPI2 by the fully automatic enzyme immunoassay device AIA-900 was carried out according to the following procedure. (1) 20 ⁇ L of the sample and 80 ⁇ L of the diluted solution containing the surfactant were automatically dispensed into the container containing the TFPI2 measurement reagent prepared in Example 1. (2) Perform an antigen-antibody reaction for 10 minutes at a constant temperature of 37 ° C. (3) After B / F separation, wash 8 times with a buffer solution containing a surfactant.
- TFPI2 integrity nmol / (L ⁇ s)
- R & D TFPI2 recombinant protein
- the measurement of CA125 was carried out using an E-test "TOSOH" II (CA125) measuring reagent (manufactured by Tosoh Corporation, approval number: 20700AMZ00504000). BoxPlot of blood TFPI2 value and blood CA125 measurement value is shown in FIG. Both TFPI2 and CA125 were found to be statistically significantly higher in ovarian malignancies (excluding highly atypical serous cancers) than in benign ovarian tumors (Man-Whitney). U test, p ⁇ 0.0001).
- the ROC analysis result is shown in FIG.
- the area under the curve (AUC) of TFPI2 is 0.749
- the AUC of CA125 is 0.761
- TFPI2 is a good ovarian malignancies comparable to CA125 (excluding high-grade serous cancer) detection performance (ovary). It was shown to have benign tumors and ovarian malignancies (excluding high-grade serous cancers).
- Example 6 Comparison of benign / malignant discrimination performance between TFPI2 and CA125 in the additional sample
- the cutoff values of TFPI2 and CA125 used were the same as those in Example 3 (TFPI2: 191 pg / mL, CA125: 35 U / mL).
- Table 4 shows the discrimination performance (sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio) of each marker calculated using the 2 ⁇ 2 contingency table. Similar to Example 3, TFPI2 was shown to be superior to CA125 in specificity, positive predictive value and positive likelihood ratio, while CA125 was shown to be superior in sensitivity to TFPI2.
- Example 7 Correlation analysis of TFPI2 and CA125 in additional samples Based on the results of Example 5, the correlation between TFPI2 and CA125 in benign ovarian tumors or malignant ovarian tumors (excluding high-grade serous cancer) The result of the analysis is shown in FIG. No significant correlation was found between TFPI2 and CA125 in either benign ovarian tumors or malignant ovarian tumors (excluding high-grade serous cancer), suggesting that they are independent indicators.
- the present invention provides a method for differentiating and detecting an ovarian malignant tumor (excluding highly atypical serous cancer) from a benign ovarian tumor by a simple blood test with a relatively small burden on the patient. This is expected to contribute to the treatment of ovarian malignancies, which do not have effective tumor markers and rely on diagnostic imaging, and is extremely useful in industry.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Urology & Nephrology (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- Cell Biology (AREA)
- Hospice & Palliative Care (AREA)
- Biotechnology (AREA)
- Food Science & Technology (AREA)
- Oncology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Peptides Or Proteins (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
一方、別の研究グループから卵巣悪性腫瘍の1つである高異型度漿液性がん(HGSC)と卵巣良性腫瘍の血漿のプロテオーム解析の結果、HGSC群で測定中央値が上昇するタンパク質群の一つとしてTFPI2が報告されている(非特許文献4)。しかし今日まで、TFPI2が境界悪性腫瘍を含む多様な組織型を有する卵巣悪性腫瘍と卵巣良性腫瘍の鑑別に適用できるかは不明であった。
すなわち、本発明は、以下の態様を包含する。
[1]検体において、TFPI2量を測定することを含む、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法。
[2]前記TFPI2量の測定値が、予め設定した基準値を超えた場合に、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)が検出されたとする、[1]に記載の方法。
[3]前記TFPI2量が、TFPI2プロセシングポリペプチド量及びインタクトTFPI2量の合計である、[1]又は[2]に記載の方法。
[4]前記TFPI2量の測定が、配列番号1のアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体を用いた抗原抗体反応により行われるものである、[1]~[3]のいずれかに記載の方法。
[5]前記抗体が、TFPI2のクニッツドメイン1を認識する抗体である、[4]に記載の方法。
[6]質量分析法を用いて測定を行う、[1]~[3]のいずれか一項に記載の方法。
[7]さらにTFPI2以外の卵巣癌マーカーを検出する方法を組み合わせて行うものである、[1]~[6]のいずれか一項に記載の方法。
[8]配列番号1に示すアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体を含む、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出するための試薬。
本発明の第一の態様は、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法であり、検体においてTFPI2量を測定することを含む。これは、卵巣良性腫瘍と比べて、卵巣悪性腫瘍の血液等の生体試料中においてTFPI2の存在が上昇することに基づく方法である。検体におけるTFPI2量の測定は、通常インビトロ(in vitro)で行われる。この方法により、後述する実施例が示す通り、高い特異度で卵巣悪性腫瘍を卵巣良性腫瘍と鑑別して検出することができる。
なお、本発明の方法は、卵巣悪性腫瘍を卵巣良性腫瘍と鑑別して検出する段階までを含むものであり、卵巣悪性腫瘍の診断に関する最終的な判断行為は含まれない。医師は、本発明の方法による検出結果等を参照して、卵巣悪性腫瘍を診断したり治療方針を立てたりする。
悪性腫瘍としては、非浸潤性低異型度漿液性癌、低異型度漿液性癌、粘液性癌、類内膜癌、明細胞癌、悪性ブレンナー腫瘍、漿液粘液性癌、未分化癌(低異型度類内膜間質肉腫、高異型度類内膜間質肉腫)、混合型上皮性間葉系腫瘍(線肉腫・癌肉腫)などの上皮性;純粋型間質性腫瘍(富細胞性線維腫・線維肉腫・悪性ステロイド細胞腫瘍)、純粋型性索腫瘍(成人型顆粒膜細胞腫・若年型顆粒膜細胞腫・セルトリ細胞腫・輪状細管を伴う性索腫瘍)などの性索間質性腫瘍;セルトリ・ライディッヒ細胞腫瘍、その他の性索間質性腫瘍などの混在型性索間質性腫瘍;未分化胚細胞腫瘍/ディスジャーミノーマ・卵黄嚢腫瘍、体芽性癌(胎児性癌)・多胎芽腫・未熟奇形腫(G3)・悪性添加を伴う成熟奇形腫線維肉腫・絨毛癌・混在型胚細胞腫瘍などの胚細胞腫瘍;癌種、肉腫;悪性リンパ腫;二次性(転移性)腫瘍等が挙げられる。これらの中でも、明細胞癌、低異型度漿液性癌、類内膜癌及び粘液性癌が好ましい例示としてあげられる。また、明細胞癌、類内膜癌及び粘液性癌が更に好ましい例示としてあげられる。
境界悪性腫瘍としては、漿液性・微少乳頭状パターンを伴う漿液性、粘液性、類内膜、明細胞、腺線維種、表在性乳頭状、ブレンナー腫瘍、漿液粘液性などの上皮性;顆粒膜細胞、セルトリ・間質細胞腫瘍(中分化型)、ステロイド細胞腫瘍(分類不能型)、ギナンドブラストーマなどの性策間質性腫瘍;未熟奇形腫(G1、G2)、カルチノイド、甲状腺腫性カルチノイドなどの胚細胞腫瘍;性腺芽腫(純粋型);等が挙げられる。
配列番号1に、ヒトTFPI2のcDNAに基づくアミノ酸配列を示す。配列番号1において、開始メチオニンから22残基目のグリシンまではシグナルペプチドである。
「インタクトTFPI2」とは、配列番号1のアミノ酸配列の23残基目から235残基目で表されるペプチドをいう。
(A)測定対象検体に対し、TFPI2を検出する方法と他の卵巣癌マーカーを検出する方法とを、同時にまたは別個に行ない、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法、
(B)測定対象検体に対し、まずTFPI2を検出する方法を適用し、その結果陰性と判定された検体に対して、他の卵巣癌マーカーを検出する方法で、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法、
(C)測定対象検体に対し、まず他の卵巣癌マーカーを検出する方法を適用し、その結果陰性と判定された検体に対して、TFPI2を検出する方法で、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法、
があげられるが、(B)または(C)の方法が、検出の際用いる試薬に無駄が生じなくなる点で好ましい。
卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して判定する基準値(Cutoff値)は、卵巣良性腫瘍と卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)をそれぞれ測定し、受信者動作特性(ROC)曲線解析により最適な感度と特異度を示す測定値に適宜設定することができる。
本発明において、検体中のNT-TFPI2量又はインタクトTFPI2量を個別に測定してもよく、またその値を合計して合計量としてもよい。また、検体中のNT-TFPI2とインタクトTFPI2の合計量を一度に測定できる測定系で測定してもよい。あるいは、後述するように、両方の測定による合計量とインタクトTFPI2単独の測定量とから間接的にNT-TFPI2量を測定してもよい。
本発明の方法において、NT-TFPI2量及び/又はインタクトTFPI2量を測定する方法は特に制限されない。例えば、NT-TFPI2及び/又はインタクトTFPI2を認識する抗体を用いる抗原抗体反応を利用した方法や、質量分析法を利用した方法が例示できる。
(b)測定対象を認識する抗体を固定化したチップに検体を接触させ、当該抗体と測定対象との結合に依存したシグナルを検出する表面プラズモン共鳴を用いた方法。
(c)蛍光標識した測定対象を認識する抗体を用い、当該抗体と測定対象とが結合することで蛍光偏光度が上昇することを利用した蛍光偏光免疫測定法。
(d)エピトープの異なる2種類の、測定対象を認識する抗体(うち1つは標識した抗体)を用い、当該2つの抗体と測定対象との3者の複合体を形成させるサンドイッチ法。
(e)前処理として測定対象を認識する抗体により検体中の測定対象を濃縮後、その測定対象を抗体より分離し、質量分析装置等により検出する方法。
(d)、(e)の方法が簡便かつ汎用性が高いが、多検体を処理する上では(d)の方法が試薬及び装置に関する技術が十分確立されている点でより好ましい。
(A)NT-TFPI2とインタクトTFPI2の両方を認識する抗体を用いて、NT-TFPI2及びインタクトTFPI2の合計量を測定する方法(NT+I-TFPI2測定系)。なお、前記NT-TFPI2とインタクトTFPI2の両方を認識する抗体は、配列番号1で表されるTFPI2アミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体であることが好ましく、TFPI2のクニッツドメイン1を抗原決定基として認識する抗体であることがさらに好ましい。また、この方法で前述したサンドイッチ法を用いる場合は、通常、前記抗体はエピトープの異なる2種類を用いる。
(D)インタクトTFPI2を認識せずNT-TFPI2を認識する抗体を用いて、NT-TFPI2単独の量を測定する方法。なお、前記インタクトTFPI2を認識せずNT-TFPI2を認識する抗体は、例えば、NT-TFPI2のC末端部分のペプチド配列を特異的に認識する抗体が挙げられる。前述したサンドイッチ法を用いる場合は、例えば、当該抗体を固相抗体とし、クニッツドメイン1を抗原決定基として認識する抗体を検出抗体とする。
免疫に用いる動物は、抗体産生能を有するものであれば特に限定はなく、マウス、ラット、ウサギなど通常免疫に用いる哺乳動物でもよいし、ニワトリなど鳥類を用いてもよい。
TFPI2を認識する抗体を産生するハイブリドーマ細胞の樹立は、技術が確立された方法の中から適宜選択して行えばよい。一例として、前述した方法で免疫した動物からB細胞を採取し、前記B細胞とミエローマ細胞とを電気的にまたはポリエチレングリコール存在下で融合させ、HAT培地により所望の抗体を産生するハイブリドーマ細胞の選択を行ない、選択したハイブリドーマ細胞を限界希釈法によりモノクローン化を行なうことで、TFPI2を認識するモノクローナル抗体を産生するハイブリドーマ細胞を樹立することができる。
なお、前記宿主としては特に限定はなく、当業者がタンパク質の発現に通常用いる、大腸菌や酵母などの微生物細胞、昆虫細胞、動物細胞の中から適宜選択すればよいが、ジスルフィド結合もしくは糖鎖付加といった翻訳後修飾により、天然型のTFPI2に近い構造を有するタンパク質の発現が可能な、哺乳細胞を宿主として用いると好ましい。哺乳細胞の一例としては、従来用いられている、ヒト胎児腎臓由来細胞(HEK)293T細胞株、サル腎臓細胞COS7株、チャイニーズハムスター卵巣(CHO)細胞またはヒトから単離された癌細胞などが挙げられる。
なお、前述したサンドイッチ法で抗原抗体反応を行なう際に用いる標識した抗体は、前述した方法で精製した抗体をペルオキシダーゼやアルカリ性ホスファターゼなどの酵素で標識すればよく、その標識も技術が十分確立された方法を用いて行なえばよい。
検体が血液である場合は、前処理工程として血液に多く含まれるアルブミン、イムノグロブリン、トランスフェリン等の主要タンパク質をAgilent Human 14等で除去した後、イオン交換、ゲル濾過または逆相HPLC等でさらに分画することが好ましい。または、抗TFPI2抗体を用いた免疫的手法によりTFPI2のみを特異的に回収することも可能である。
(i)TFPI2量の測定値が予め設定した基準値を超えるものとして患者を同定する工程、及び
(ii)前記同定された患者に対して治療を施す工程、を含む方法が提供される。
前記工程(i)の同定において、TFPI2量の測定は、NT-TFPI2及び/又はインタクトTFPI2を特異的に認識する抗体を用いて行われてもよいし、質量分析法を用いて行われてもよい。
前記工程(ii)の治療としては、外科的治療、薬物療法、放射線療法等が挙げられるが特に限定されない。
本発明の第二の態様は、NT-TFPI2及び/又はインタクトTFPI2を認識する抗体を含む、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出するための試薬である。係る抗体としては、NT-TFPI2及びインタクトTFPI2を認識する抗体がより好ましい。より具体的には、配列番号1に示すアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体がさらに好ましい。
本発明の試薬を前述したサンドイッチ法に利用する場合は、前記抗体としてエピトープの異なる2種類の抗体を含むことが好ましい。
本発明の試薬に含まれる抗体は、抗体そのものであってもよく、標識されていてもよく、固相に固定化されていてもよい。
まず、本発明の試薬は、以下の(I)から(III)に示す方法で作製することができる。
(I)まず、サンドイッチ法で用いる、TFPI2を認識する、エピトープの異なる2種類の抗体(以下、「抗体1」及び「抗体2」とする)のうち、抗体1をイムノプレートや磁性粒子等のB/F(Bound/Free)分離可能な担体に結合させる。結合方法は、疎水結合を利用した物理的結合であってもよいし、2物質間を架橋可能なリンカー試薬などを用いた化学的結合であってもよい。
なお、1ステップサンドイッチ法の場合は、前述した(I)~(II)同様に担体に抗体1を結合させブロッキング処理を行なったものを作製し、前記抗体固定化担体に、標識した抗体2を含む緩衝液をさらに添加して試薬を作製すればよい。
(IV)(II)で作製した1次試薬と検体とを一定時間、一定温度のもと接触させる。反応条件は、温度4℃から40℃の範囲で、5分から180分間反応させればよい。
(V)未反応物質をB/F分離により除去し、続いて(III)で作製した2次試薬と一定時間、一定温度のもと接触させ、サンドイッチ複合体を形成させる。反応条件は、温度4℃から40℃の範囲で、5分から180分間反応させればよい。
(VI)未反応物質をB/F分離により除去し、標識抗体の標識物質を定量し、既知濃度のTFPI2溶液を標準とし作成した検量線により、検体中のヒトTFPI2を定量する。
本発明の別の側面は、NT-TFPI2及び/又はインタクトTFPI2の、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出することにおける使用である。
本発明の別の側面は、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出するために使用される、NT-TFPI2及び/又はインタクトTFPI2である。
本発明の別の側面は、NT-TFPI2及び/又はインタクトTFPI2を認識する抗体の、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出することにおける使用である。
本発明の別の側面は、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出するために使用される、NT-TFPI2及び/又はインタクトTFPI2を認識する抗体である。
これらの側面における前記抗体としては、配列番号1に示すアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体が好ましい。
特許文献3の方法に従い、DNA免疫法により得られたTFPI2抗体を用いてTFPI2測定試薬を以下の通り調製した。
(1)水不溶性フェライト含有担体に抗TFPI2モノクローナル抗体(TS-TF04)を100ng/担体になるように室温にて一昼夜物理的に吸着させ、その後1%BSAを含む100mMトリス緩衝液(pH8.0)にて53℃・4時間ブロッキングを行なうことで、抗TFPI2抗体固定化担体を調製した。
(2)抗TFPI2モノクローナル抗体(TS-TF01)をアルカリフォスファターゼ標識キット(同仁化学社製)にて、アルカリフォスファターゼ標識抗TFPI2抗体を調製した。
(3)磁力透過性の容器(容量1.2mL)に、(1)で調製した12個の抗体固定化担体を入れた後、(2)で調製したアルカリフォスファターゼ標識抗体を1μg/mL含む緩衝液(3%BSAを含むトリス緩衝液、pH8.0)100μLを添加し、凍結乾燥を実施することで、TFPI2測定試薬を作製した。なお、作製したTFPI2測定試薬は窒素充填下にて密閉封印シールを施し、測定まで4℃で保管した。
本実施例で使用した臨床検体の内訳を表1に示す。卵巣良性腫瘍血清33例と卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)血清38例は横浜市立大学産婦人科にて同一プロトコルにて収集された検体であり、インフォームドコンセントの承諾及び横浜市立大学倫理委員会の承認を受けて提供された。
(1)サンプル20μLと界面活性剤を含む希釈液80μLを、実施例1で作製したTFPI2測定試薬を収容した容器に自動で分注し、
(2)37℃恒温下で10分間の抗原抗体反応を行ない、
(3)B/F分離後、界面活性剤を含む緩衝液にて8回の洗浄を行ない、
(4)4-メチルウンベリフェリルリン酸塩を添加し、単位時間当たりのアルカリフォスファターゼによる4-メチルウンベリフェロン生成濃度をもって測定値(TFPI2 intensity、nmol/(L・s))とした。
ROC解析結果を図2に示す。TFPI2の曲線下面積(AUC)は0.7644、CA125のAUCは0.7699となり、TFPI2はCA125に匹敵する良好な卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)検出性能(卵巣良性腫瘍と卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)の鑑別性能)を有することが示された。
TFPI2のカットオフ値(191pg/mL)は実施例2のROC解析結果よりYouden index(特異度+感度-1)が最大値となる濃度とした。CA125は臨床現場で使用されているカットオフ値(35U/mL)を用いた。2×2分割表を用いて算出した各マーカーの鑑別性能(感度、特異度、陽性的中率、陰性的中率、陽性尤度比、陰性尤度比)を表2に示す。TFPI2はCA125に比べて特異度、陽性的中率および陽性尤度比に優れることが示された、一方、CA125はTFPI2に比べて感度に優れることが示された。
実施例2の結果を基に、卵巣良性腫瘍または卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)におけるTFPI2とCA125の相関を解析した結果を図3に示す。TFPI2とCA125は卵巣良性腫瘍または卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)のいずれにおいても有意な相関は認められず、独立した指標となることが示唆された。
本実施例で使用した臨床検体の内訳を表3に示す。卵巣良性腫瘍血清77例と卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)血清274例は横浜市立大学産婦人科にて同一プロトコルにて収集された検体であり、インフォームドコンセントの承諾及び横浜市立大学倫理委員会の承認を受けて提供された。
(1)サンプル20μLと界面活性剤を含む希釈液80μLを、実施例1で作製したTFPI2測定試薬を収容した容器に自動で分注し、
(2)37℃恒温下で10分間の抗原抗体反応を行ない、
(3)B/F分離後、界面活性剤を含む緩衝液にて8回の洗浄を行ない、
(4)4-メチルウンベリフェリルリン酸塩を添加し、単位時間当たりのアルカリフォスファターゼによる4-メチルウンベリフェロン生成濃度をもって測定値(TFPI2 intensity、nmol/(L・s))とした。
市販TFPI2組み換えタンパク(R&D社)を標準品として検量線を作成し、検体中のTFPI2濃度を算出した。CA125の測定は、Eテスト「TOSOH」II(CA125)測定試薬(東ソー社製、承認番号:20700AMZ00504000)を用いて測定した。
血中TFPI2値および血中CA125測定値のBoxPlotを図4に示す。TFPI2およびCA125はいずれも卵巣良性腫瘍と比較して卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)では統計的有意差を持って高値を示すことが明らかとなった(マン=ホイットニーのU検定、p<0.0001)。
TFPI2およびCA125のカットオフ値は、実施例3と同じ値(TFPI2:191pg/mL、CA125:35U/mL)を用いた。2×2分割表を用いて算出した各マーカーの鑑別性能(感度、特異度、陽性的中率、陰性的中率、陽性尤度比、陰性尤度比)を表4に示す。実施例3と同様に、TFPI2はCA125に比べて特異度、陽性的中率および陽性尤度比に優れることが示された、一方、CA125はTFPI2に比べて感度に優れることが示された。
実施例5の結果を基に、卵巣良性腫瘍または卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)におけるTFPI2とCA125の相関を解析した結果を図6に示す。TFPI2とCA125は卵巣良性腫瘍または卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)のいずれにおいても有意な相関は認められず、独立した指標となることが示唆された。
Claims (8)
- 検体において、TFPI2量を測定することを含む、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出する方法。
- 前記TFPI2量の測定値が、予め設定した基準値を超えた場合に、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)が検出されたとする、請求項1に記載の方法。
- 前記TFPI2量が、TFPI2プロセシングポリペプチド量及びインタクトTFPI2量の合計である、請求項1又は2に記載の方法。
- 前記TFPI2量の測定が、配列番号1のアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体を用いた抗原抗体反応により行われるものである、請求項1~3のいずれか一項に記載の方法。
- 前記抗体が、TFPI2のクニッツドメイン1を認識する抗体である、請求項4に記載の方法。
- 質量分析法を用いて測定を行う、請求項1~3のいずれか一項に記載の方法。
- さらにTFPI2以外の卵巣癌マーカーを検出する方法を組み合わせて行うものである、請求項1~6のいずれか一項に記載の方法。
- 配列番号1に示すアミノ酸配列の23残基目のアスパラギン酸から131残基目のヒスチジン又は130残基目のシステインまでの領域内の抗原決定基に結合する抗体を含む、卵巣悪性腫瘍(但し、高異型度漿液性がんを除く)を卵巣良性腫瘍と鑑別して検出するための試薬。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022503238A JPWO2021172000A1 (ja) | 2020-02-26 | 2021-02-09 | |
CA3172404A CA3172404A1 (en) | 2020-02-26 | 2021-02-09 | Method and reagent for detecting malignant ovarian tumors |
US17/802,354 US20230122642A1 (en) | 2020-02-26 | 2021-02-09 | Method and reagent for detecting malignant ovarian tumors |
BR112022016212A BR112022016212A2 (pt) | 2020-02-26 | 2021-02-09 | Método para detectar tumor ovariano maligno, e, uso de um anticorpo |
EP21760051.9A EP4113119A4 (en) | 2020-02-26 | 2021-02-09 | METHOD AND REAGENT FOR DETECTING MALIGNANT OVARIAN TUMORS |
AU2021227181A AU2021227181A1 (en) | 2020-02-26 | 2021-02-09 | Method and reagent for detecting malignant ovarian tumors |
CN202180016885.2A CN115151821A (zh) | 2020-02-26 | 2021-02-09 | 卵巢恶性肿瘤的检测方法和检测试剂 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020030210 | 2020-02-26 | ||
JP2020-030210 | 2020-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021172000A1 true WO2021172000A1 (ja) | 2021-09-02 |
Family
ID=77490489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/004736 WO2021172000A1 (ja) | 2020-02-26 | 2021-02-09 | 卵巣悪性腫瘍の検出方法及び検出試薬 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20230122642A1 (ja) |
EP (1) | EP4113119A4 (ja) |
JP (1) | JPWO2021172000A1 (ja) |
CN (1) | CN115151821A (ja) |
AU (1) | AU2021227181A1 (ja) |
BR (1) | BR112022016212A2 (ja) |
CA (1) | CA3172404A1 (ja) |
WO (1) | WO2021172000A1 (ja) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050037389A1 (en) * | 2003-06-03 | 2005-02-17 | Santin Alessandro D. | Gene expression profiling of uterine serous papillary carcinomas and ovarian serous papillary tumors |
US20050095592A1 (en) * | 2002-02-13 | 2005-05-05 | Jazaeri Amir A. | Identification of ovarian cancer tumor markers and therapeutic targets |
JP2007506965A (ja) * | 2003-09-24 | 2007-03-22 | オンコセラピー・サイエンス株式会社 | Tfpi−2タンパク質を用いた卵巣子宮内膜症の診断法 |
JP2012145500A (ja) * | 2011-01-13 | 2012-08-02 | National Institute Of Advanced Industrial & Technology | 上皮性卵巣癌鑑別マーカー |
JP2013061321A (ja) * | 2011-08-19 | 2013-04-04 | Yokohama City Univ | 組織因子経路阻害因子2(tfpi2)測定による卵巣明細胞腺癌の検査方法および検査薬 |
JP5224309B2 (ja) | 2010-02-22 | 2013-07-03 | 公立大学法人横浜市立大学 | 卵巣明細胞腺癌に特異的に発現しているタンパク質とその応用 |
WO2016084912A1 (ja) | 2014-11-27 | 2016-06-02 | 公立大学法人横浜市立大学 | 卵巣明細胞腺癌の検査方法及び検査薬 |
EP3657170A1 (en) * | 2018-11-20 | 2020-05-27 | Philipps-Universität Marburg | Method for the early detection and diagnosis of primary and relapsed ovarian carcinoma (oc) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6760562B2 (ja) * | 2016-09-30 | 2020-09-23 | 公立大学法人横浜市立大学 | 卵巣明細胞癌患者の予後を予測するための情報提供方法 |
-
2021
- 2021-02-09 JP JP2022503238A patent/JPWO2021172000A1/ja active Pending
- 2021-02-09 WO PCT/JP2021/004736 patent/WO2021172000A1/ja unknown
- 2021-02-09 CN CN202180016885.2A patent/CN115151821A/zh active Pending
- 2021-02-09 US US17/802,354 patent/US20230122642A1/en active Pending
- 2021-02-09 CA CA3172404A patent/CA3172404A1/en active Pending
- 2021-02-09 BR BR112022016212A patent/BR112022016212A2/pt unknown
- 2021-02-09 AU AU2021227181A patent/AU2021227181A1/en active Pending
- 2021-02-09 EP EP21760051.9A patent/EP4113119A4/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050095592A1 (en) * | 2002-02-13 | 2005-05-05 | Jazaeri Amir A. | Identification of ovarian cancer tumor markers and therapeutic targets |
US20050037389A1 (en) * | 2003-06-03 | 2005-02-17 | Santin Alessandro D. | Gene expression profiling of uterine serous papillary carcinomas and ovarian serous papillary tumors |
JP2007506965A (ja) * | 2003-09-24 | 2007-03-22 | オンコセラピー・サイエンス株式会社 | Tfpi−2タンパク質を用いた卵巣子宮内膜症の診断法 |
JP5224309B2 (ja) | 2010-02-22 | 2013-07-03 | 公立大学法人横浜市立大学 | 卵巣明細胞腺癌に特異的に発現しているタンパク質とその応用 |
JP2012145500A (ja) * | 2011-01-13 | 2012-08-02 | National Institute Of Advanced Industrial & Technology | 上皮性卵巣癌鑑別マーカー |
JP2013061321A (ja) * | 2011-08-19 | 2013-04-04 | Yokohama City Univ | 組織因子経路阻害因子2(tfpi2)測定による卵巣明細胞腺癌の検査方法および検査薬 |
JP6074676B2 (ja) | 2011-08-19 | 2017-02-08 | 公立大学法人横浜市立大学 | 組織因子経路阻害因子2(tfpi2)測定による卵巣明細胞腺癌の検査方法および検査薬 |
WO2016084912A1 (ja) | 2014-11-27 | 2016-06-02 | 公立大学法人横浜市立大学 | 卵巣明細胞腺癌の検査方法及び検査薬 |
EP3657170A1 (en) * | 2018-11-20 | 2020-05-27 | Philipps-Universität Marburg | Method for the early detection and diagnosis of primary and relapsed ovarian carcinoma (oc) |
Non-Patent Citations (8)
Title |
---|
BOLTENBERG A, FURGYIK S: "PLACENTAL PROTEINS (PP 5, PP 12 AND PP 14) IN OVARIAN TUMORS A PRELIMINARY REPORT", ACTA OBSTETRICIA AND GYNECOLOGICA SCANDINAVICA., MUNKSGAARD, COPENHAGEN., DK, vol. 66, no. 03, 1 January 1987 (1987-01-01), DK, pages 213 - 215, XP000990701, ISSN: 0001-6349 * |
FRONTIERS IN ONCOLOGY, vol. 9, 2019, pages 1150 |
INABA N, ISHIGE H, IJICHI M, SATOH N, OHKAWA R, SEKIYA S, SHIROTAKE S, TAKAMIZAWA H, RENK T, BOHN H: "IMMUNO HISTOCHEMICAL DETECTION OF PREGNANCY SPECIFIC PROTEIN SP-1 AND PLACENTA SPECIFIC TISSUE PROTEINS PP-5 PP-10 PP-11 AND PP-12 IN OVARIAN ADENO CARCINOMAS", ONCODEVELOPMENT BIOLOGY AND MEDICINE, ELSEVIER, AMSTERDAM,, NL, vol. 3, no. 5-6, 1 January 1982 (1982-01-01), NL, pages 379 - 390, XP009140970, ISSN: 0167-1618 * |
J. PROTEOME RES., vol. 12, no. 10, 2013, pages 4340 - 4350 |
PLOS ONE, vol. 10, 2016, pages e0165609 |
See also references of EP4113119A4 |
TUMOR BIOLOGY, vol. 2, 2015, pages 1045 - 1053 |
ZHANG, QING ET AL.: "A multiplex methylation- specific PCR assay for the detection of early- stage ovarian cancer using cell -free serum DNA", CYNECOLOGIC ONCOLOGY, vol. 130, 2013, pages 132 - 139, XP028569267, DOI: 10.1016/j.ygyno.2013.04.048 * |
Also Published As
Publication number | Publication date |
---|---|
CA3172404A1 (en) | 2021-09-02 |
CN115151821A (zh) | 2022-10-04 |
US20230122642A1 (en) | 2023-04-20 |
BR112022016212A2 (pt) | 2022-10-04 |
JPWO2021172000A1 (ja) | 2021-09-02 |
EP4113119A1 (en) | 2023-01-04 |
AU2021227181A1 (en) | 2022-09-22 |
EP4113119A4 (en) | 2024-03-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11193936B2 (en) | Method and reagent for detecting ovarian clear cell adenocarcinoma | |
EP3742166B1 (en) | Renal cancer detection method and test drug | |
JP5856956B2 (ja) | 血液検査方法 | |
WO2021172000A1 (ja) | 卵巣悪性腫瘍の検出方法及び検出試薬 | |
JP6760562B2 (ja) | 卵巣明細胞癌患者の予後を予測するための情報提供方法 | |
WO2021246153A1 (ja) | 膵臓がんの検出方法及び検出試薬 | |
WO2023013673A1 (ja) | 悪性腫瘍関連血栓塞栓症の検出方法及び検出試薬 | |
US8741288B2 (en) | Protein markers for detecting liver cancer and method for identifying the markers thereof | |
WO2021100621A1 (ja) | がんの骨転移を検出する方法及び検出試薬 | |
JP2024117619A (ja) | 子宮体癌患者の予後を予測するための情報提供方法 | |
US20130095483A1 (en) | Predictive biomarkers for breast cancer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21760051 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022503238 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 3172404 Country of ref document: CA |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112022016212 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 2021227181 Country of ref document: AU Date of ref document: 20210209 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021760051 Country of ref document: EP Effective date: 20220926 |
|
ENP | Entry into the national phase |
Ref document number: 112022016212 Country of ref document: BR Kind code of ref document: A2 Effective date: 20220815 |