JP6829888B2 - 非アルコール性脂肪性肝炎診断用キット及び試験方法 - Google Patents
非アルコール性脂肪性肝炎診断用キット及び試験方法 Download PDFInfo
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Classifications
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- 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
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
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- 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
-
- 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
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
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- Physics & Mathematics (AREA)
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- Urology & Nephrology (AREA)
- Bioinformatics & Cheminformatics (AREA)
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- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Enzymes And Modification Thereof (AREA)
Description
(1)Procollagen C−endopeptidase enhancer(PCPE−1)遺伝子又はPCPE−1タンパク質からなる、NASHマーカー。
(2)PCPE−1タンパク質に対する特異的結合物質、PCPE−1遺伝子のcDNAを増幅するためのプライマーセット、又はPCPE−1遺伝子のmRNAに特異的にハイブリダイズするプローブ、を備える、NASH診断用キット。
(3)生体試料中の、PCPE−1遺伝子又はPCPE−1タンパク質の発現量を定量する工程を備える、NASHの検出方法。
1実施形態において、本発明は、PCPE−1遺伝子又はPCPE−1タンパク質からなる、NASH(非アルコール性脂肪性肝炎)マーカーを提供する。
1実施形態において、本発明は、PCPE−1タンパク質に対する特異的結合物質、PCPE−1遺伝子のcDNAを増幅するためのプライマーセット、又はPCPE−1遺伝子のmRNAに特異的にハイブリダイズするプローブ、を備える、NASH診断用キットを提供する。
1実施形態において、本発明は、生体試料中の、PCPE−1遺伝子又はPCPE−1タンパク質の発現量を定量する工程を備える、NASHの検出方法を提供する。本実施形態の検出方法は、NASHの診断方法であるということもできる。
(褐色脂肪組織から分泌されるタンパク質の探索)
発明者らは、褐色脂肪組織から分泌されるタンパク質を解析した。その結果、NASHマーカーを見出した。本実験例の内容について、以下に、より詳細に説明する。
(肥満ストレスで褐色脂肪組織におけるPCPE−1の発現レベルが上昇した)
4週齢のマウスに高脂肪食を8週間与えた肥満マウスモデルの各臓器におけるPCPE−1遺伝子の発現量をリアルタイムPCRにより測定した。対照として通常食を与えたマウスを使用した。マウスPCPE−1遺伝子のcDNAを増幅するためのプライマーとしては、センスプライマー(配列番号7)及びアンチセンスプライマー(配列番号8)を使用した。また、臓器としては、褐色脂肪組織、白色脂肪組織、肝臓、心臓、腎臓、肺、筋、脾臓を用いた。
(肥満ストレスで血漿中のPCPE−1レベルが上昇した)
4週齢のマウスに高脂肪食を8ヶ月間与えた肥満マウスモデル及び通常食を与えた対照のマウスの血漿中のPCPE−1タンパク質の量をELISA法により定量した。PCPE−1タンパク質の定量には、市販のキット(型式「DL−PCPE1−Mu」、DLDEVELOP社)を使用した。
(肥満ストレスにより肝臓におけるPCPE−1レベルが上昇した)
4週齢のマウスに高脂肪食を8ヶ月間与えた肥満マウスモデルの肝臓における、PCPE−1タンパク質の存在を、ウエスタンブロッティング法により検出した。対照として通常食を与えたマウスの肝臓を使用した。PCPE−1タンパク質の検出には、抗PCPE−1抗体(型式「MAB2239」、R&Dシステムズ社)を使用した。また、ローディングコントロールとして、グリセルアルデヒド3リン酸脱水素酵素(GAPDH)タンパク質を検出した。GAPDHタンパク質の検出には、抗GAPDH抗体(型式「#3683S」、Cell Signaling Technology社)を使用した。
(NASH患者の血清中でPCPE−1レベルが上昇した)
NASH患者の血清中のPCPE−1タンパク質の量を定量した(n=46)。また、同時に、健常人(n=29)及び肥満患者(BMI25以上)(n=22)の血清中のPCPE−1タンパク質の量を定量した。PCPE−1タンパク質の定量には、市販のキット(型式「MBS722836」、MyBioSource社)を使用した。
(PCPE−1は肝星細胞によるI型コラーゲンの分泌を促進した)
NASH患者の肝臓においてTransforming growth factor(TGF)−βの発現が上昇することが知られている。そこで、ヒト肝星細胞株LX−2を、終濃度1.0ng/mLのTGF−β(型式「240−B−002」、R&D社)の存在下で培養した。上記の細胞の培地に、リン酸緩衝液(PBS)(n=4)又は終濃度8.5μMのPCPE−1タンパク質(型式「2627−PE−020」、R&D社)(n=4)を添加して24時間培養し、I型コラーゲンの分泌量を定量した。対照として、TGF−βの非存在下で培養したLX−2細胞の培地に、リン酸緩衝液(PBS)(n=6)又は終濃度8.5μMのPCPE−1タンパク質(n=8)を添加して24時間培養し、I型コラーゲンの分泌量をELISA法により定量した。I型コラーゲンの定量には市販のキット(型式「ACE−EC1−E205−EX」、コスモバイオ社)を使用した。
Claims (3)
- Procollagen C−endopeptidase enhancer(PCPE−1)タンパク質に対する特異的結合物質、
PCPE−1遺伝子のcDNAを増幅するためのプライマーセット、又は
PCPE−1遺伝子のmRNAに特異的にハイブリダイズするプローブ、
を備える、非アルコール性脂肪性肝炎診断用キット。 - 被験者由来の褐色脂肪組織試料におけるPCPE−1遺伝子又はPCPE−1タンパク質の発現量を定量する工程を備え、前記発現量が、健常人由来の褐色脂肪組織におけるPCPE−1遺伝子又はPCPE−1タンパク質の発現量と比較して有意に高いことが、前記被験者が非アルコール性脂肪性肝炎に罹患している可能性が高いことを示す、褐色脂肪組織試料の試験方法。
- 被験者由来の血清又は血漿中のPCPE−1タンパク質の発現量を定量する工程を備え、前記発現量が、健常人由来の血清又は血漿中のPCPE−1タンパク質の発現量と比較して有意に高いことが、前記被験者が非アルコール性脂肪性肝炎に罹患している可能性が高いことを示す、血清又は血漿の試験方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2015202418 | 2015-10-13 | ||
JP2015202418 | 2015-10-13 | ||
PCT/JP2016/080346 WO2017065206A1 (ja) | 2015-10-13 | 2016-10-13 | 非アルコール性脂肪性肝炎マーカー及びその使用 |
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JPWO2017065206A1 JPWO2017065206A1 (ja) | 2018-07-26 |
JP6829888B2 true JP6829888B2 (ja) | 2021-02-17 |
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US20200393473A1 (en) | 2018-02-26 | 2020-12-17 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Ezetimibe metabolite as a non-invasive biomarker for non-alcoholic steatohepatitis (nash) |
FR3133609A1 (fr) | 2022-03-17 | 2023-09-22 | Nvh Medicinal | Ligands spécifiques de la glycoprotéine PCPE-1 et leurs utilisations |
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WO2009122367A2 (en) * | 2008-04-02 | 2009-10-08 | Tel Hashomer Medical Research Infrastructure And Services Ltd | Procollagen c-proteinase enhancer (pcpe) biomarker for bone formation |
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