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2016 Fiscal Year Annual Research Report

Development of new therapeutic approaches against chronic liver diseases with combination of hepatic progenitor cells and clinical available agents

Research Project

Project/Area Number 26461017
Research InstitutionNara Medical University

Principal Investigator

吉治 仁志  奈良県立医科大学, 医学部, 教授 (40336855)

Co-Investigator(Kenkyū-buntansha) 北出 光輝  奈良県立医科大学, 医学部, 学内講師 (40526795)
Project Period (FY) 2014-04-01 – 2017-03-31
Keywords肝線維化 / 肝前駆細胞 / 肝再生 / 選択的NOTCH1阻害薬
Outline of Annual Research Achievements

今年度は昨年度に行った肝前駆細胞 (HPC)とアンジオテンシン受容体阻害薬 (ARB)の相互作用に加えて、HPCの分化運命を胆管上皮細胞に向けているNOTCHを特異的に阻害するNOTCH1阻害薬を用いて生体における肝線維化抑制効果について検討し成果を得た。我々はこれまでの本基盤
研究において、障害肝においてNOTCH1を制御すると肝前駆細胞(HPC)の分化運命が胆管上皮細胞から肝細胞に向かうことにより効率的な肝再生をきたす事を報告してきた。今回は、マウス肝線維化モデルにおける新規NOTCH1選択的阻害剤による肝再生治療の可能性について検討した。マウスに、HPCを強く誘導する5- diethoxycarbonyl- 1,4- dihydrocollidine (DDC)を4週間投与してHPC増加を伴う実験的肝線維症を作成して多方面からの解析を行った。また、マウスHPC株におけるNOTCH1阻害剤の肝細胞分化効率についてもin vitroで解析を加えた。その結果、NOTCH1阻害薬投与群では有意な肝重量増加、血清T-bil値低下を呈し、NOTCH1制御による肝再生促進が示唆された。組織学的検討を行ったところ、両群ともA6/CK19両陽性HPCが見られたが、NOTCH1阻害薬投与群においてA6陽性・CK19陰性の新生肝細胞数が増加する一方、A6/CK19両陽性新生胆管数は減少していた。また、マウスHPC株の肝細胞分化効率は、NOTCH1阻害剤の投与によって増加した。これらの結果より、NOTCH1制御によってHPCの分化運命が胆管上皮細胞から肝細胞に傾き、その結果肝再生が効率的に行われた事が示唆された。以上の結果より新規NOTCH1阻害剤による肝線維化抑制と共に、HPC分化運命制御を介した効率的な肝再生治療の可能性を確認した。

  • Research Products

    (11 results)

All 2017 2016

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 5 results) Book (1 results)

  • [Journal Article] Clinical significance of the Scheuer histological staging system for primary biliary cholangitis in Japanese patients.2017

    • Author(s)
      Namisaki T, Yoshiji H
    • Journal Title

      Eur J Gastroenterol Hepatol.

      Volume: 29 Pages: 23-30

    • DOI

      PMID:27755231

    • Peer Reviewed
  • [Journal Article] Ipragliflozin, a sodium-glucose cotransporter 2 inhibitor, ameliorates the development of liver fibrosis in diabetic Otsuka Long-Evans Tokushima fatty rats.2016

    • Author(s)
      Nishimura N, Yoshiji H.
    • Journal Title

      J Gastroenterol

      Volume: 12 Pages: 1141-1149

    • DOI

      PMID:27025708 Epub 2016 Mar 29.

    • Peer Reviewed
  • [Journal Article] Combined treatment with dipeptidyl peptidase-4 inhibitor (sitagliptin) and angiotensin-II type 1 receptor blocker (losartan) suppresses progression in a non-diabetic rat model of steatohepatitis.2016

    • Author(s)
      Okura Y,Yoshiji H.
    • Journal Title

      Hepatol Res

      Volume: Dec28 Pages: online first

    • DOI

      doi: 10.1111/hepr.12860

    • Peer Reviewed
  • [Journal Article] Efficacy of alogliptin in preventing non-alcoholic fatty liver disease progression in patients with type 2 diabetes.2016

    • Author(s)
      Mashitani T Yoshiji H.
    • Journal Title

      Biomed Rep.

      Volume: 4 Pages: 183-187

    • DOI

      PMID: 26893835

    • Peer Reviewed
  • [Journal Article] DNA methylation of angiotensin II receptor gene in nonalcoholic steatohepatitis-related liver fibrosis2016

    • Author(s)
      Asada K, Yoshiji H
    • Journal Title

      World J Hepatol

      Volume: 8 Pages: 1194-1197

    • DOI

      PMID:27729955

    • Peer Reviewed
  • [Presentation] DNMT1-deleted hepatocytes cause promoted replicative senescence and induce liver fibrosis development with global DNA hypomethylation.2016

    • Author(s)
      Kaji K, Yoshiji H;
    • Organizer
      AASLD
    • Place of Presentation
      ボストン米国
    • Year and Date
      2016-11-11 – 2016-11-12
    • Int'l Joint Research
  • [Presentation] Combination treatment of dipeptidyl peptidase Ⅳ inhibitor and angiotensin-Ⅱtype 1 receptor blocker attenuates progression of nonalcoholic steatohepatitis in rats.2016

    • Author(s)
      Sato S, Yoshiji H;
    • Organizer
      AASLD
    • Place of Presentation
      ボストン米国
    • Year and Date
      2016-11-11 – 2016-11-12
    • Int'l Joint Research
  • [Presentation] mpact of the combination of Farnesoid Ⅹ receptor agonist and angiotensin-Ⅱtype1 receptor blocker on hepatic fibrogenesis in the rat model of nonalcoholic steatohepatitis.2016

    • Author(s)
      Namisaki T, Yoshiji H;
    • Organizer
      AASLD
    • Place of Presentation
      ボストン米国
    • Year and Date
      2016-11-11 – 2016-11-12
    • Int'l Joint Research
  • [Presentation] Impact of the combination of dipeptidyl peptidase IV inhibitor and angiotensin-Ⅱtype 1 receptor blocker on hepatocarcinogenesis in a rat model of nonalcoholic steatohepatitis.2016

    • Author(s)
      Okura Y, Yoshiji H;
    • Organizer
      EASL
    • Place of Presentation
      バルセロナ スペイン
    • Year and Date
      2016-04-14 – 2016-04-15
    • Int'l Joint Research
  • [Presentation] Antifirotic effects of combined treatment with farnesoid X receptor agonist and angiotensin-Ⅱtype1 receptor blocker on hepatic fibrogenesis in the rat model of nonalcoholic steatohepatitis.2016

    • Author(s)
      Namisaki T, Yoshiji H
    • Organizer
      EASL
    • Place of Presentation
      バルセロナ スペイン
    • Year and Date
      2016-04-14 – 2016-04-15
    • Int'l Joint Research
  • [Book] Metabolic Syndrome and the Liver: The Liver in Systemic Diseases2016

    • Author(s)
      Yoshimi H
    • Total Pages
      p149-177/ 566
    • Publisher
      Springer

URL: 

Published: 2018-01-16  

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