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Mechanisms of extrahepatic complications in NAFLD/NASH with focus on exosomes

Research Project

Project/Area Number 19K08417
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionNiigata University

Principal Investigator

Takamura Masaaki  新潟大学, 医歯学総合研究科, 客員研究員 (20422602)

Co-Investigator(Kenkyū-buntansha) 横尾 健  新潟大学, 医歯学総合研究科, 特任准教授 (80750629)
寺井 崇二  新潟大学, 医歯学系, 教授 (00332809)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsエクソソーム / 非アルコール性脂肪肝疾患 / 非アルコール性脂肪肝炎 / 肝外合併症 / プロテオーム解析 / 肝外悪性腫瘍 / 虚血性心疾患
Outline of Research at the Start

非アルコール性脂肪肝疾患 (NAFLD) は、肝硬変や肝細胞癌といった肝病変の進展が注目されてきたが、最近の観察研究によると、心血管イベント等の肝外合併症による死因が肝関連死を上回ることが明らかになってきた。しかしそのメカニズムはほとんど理解されていない。
本研究はエクソソームに着目し、肝外合併症発症メカニズムの分子・細胞レベルでの解明をすることが目的である。Human CD63-GFP トランスジェニックラットを用いた NAFLD エクソソーム体内動態の可視化や、エクソソーム内の miRNA の網羅的解析後に機能解析を進め、miRNAを用いた新規核酸治療薬開発への応用を目指す。

Outline of Final Research Achievements

In this study, we observed the dynamics of exosomes in human CD63-GFP Tg rats, which can visualize exosomes, and conducted a proteome analysis of exosome-incorporated proteins in the blood of rats fed a high-fat diet and control rats to search for candidate proteins involved in the pathogenesis of extrahepatic complications. We searched for candidate proteins involved in the pathogenesis of extrahepatic complications.
Exosomes were identified in the stomach and kidney, but their expression in the liver was insufficient for further validation. No protein was identified that was expressed in both groups with a 2-fold or greater difference in expression. Many of the proteins identified in high-fat diet-fed NAFLD rats alone have not been reported in NAFLD and require further investigation in the context of clinical data.

Academic Significance and Societal Importance of the Research Achievements

今回の研究で、エクソソーム内タンパク質のプロテオーム解析から多くの候補タンパク質が得られた。これらの今後の解析により、非アルコール性脂肪肝疾患(NAFLD)/非アルコール性脂肪肝炎(NASH)の肝外合併症発症メカニズムの分子・細胞レベルでの解明がされ創薬につながれば、わが国でも1000万人以上いると推定されている本疾患の生命予後の改善に大いに役立つと考える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (5 results)

  • [Journal Article] Changes in disease characteristics of primary biliary cholangitis: An observational retrospective study from 1982 to 20162021

    • Author(s)
      Takamura M, Matsuda Y, Terai S, and Niigata PBC Study Group.
    • Journal Title

      Hepatology research

      Volume: 51 Issue: 2 Pages: 166-175

    • DOI

      10.1111/hepr.13586

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Paris II and Rotterdam criteria are the best predictors of outcomes in patients with primary biliary cholangitis in Japan2021

    • Author(s)
      Kimura N, Takamura M, Takeda N, Watanabe Y, Arao Y, Takatsuna M, Takeuchi S, Abe H, Setsu T, Kamimura H, Sakamaki A, Kamimura K, Tsuchiya A, and Terai S.
    • Journal Title

      Hepatology International

      Volume: 15 Issue: 2 Pages: 437-443

    • DOI

      10.1007/s12072-021-10163-0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Blocking sphingosine 1-phosphate receptor 2 accelerates hepatocellular carcinoma progression in a mouse model of NASH2020

    • Author(s)
      Yoshida T, Tsuchiya A, Kumagai M, Takeuchi S, Nojiri S, Watanabe T, Ogawa M, Itoh M, Takamura M, Suganami T, Ogawa Y, Terai S.
    • Journal Title

      Biochem Biophys Res Commun

      Volume: 530 Issue: 4 Pages: 665-672

    • DOI

      10.1016/j.bbrc.2020.07.099

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 原発性胆汁性胆管炎の病態における腎機能の影響2021

    • Author(s)
      高村昌昭, 薛徹, 寺井崇二.
    • Organizer
      第57回 日本肝臓学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 健診スクリーニングを意識した肝発癌リスク評価におけるFIB-4 indexの有用性2020

    • Author(s)
      横尾健、高村昌昭、寺井崇二
    • Organizer
      第56回日本肝臓学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] ALBI score/gradeからみたNASH薬物治療に対する肝予備能への影響2020

    • Author(s)
      高村昌昭、横尾健、寺井崇二
    • Organizer
      第24回日本肝臓学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] CAPに基づき診断したMetabolic dysfunction-associated fatty liver diseaseの臨床的特徴2020

    • Author(s)
      横尾健、高村昌昭、寺井崇二
    • Organizer
      第43回日本肝臓学会東部会
    • Related Report
      2020 Research-status Report
  • [Presentation] 非アルコール性脂肪肝疾患の悪性腫瘍無病生存予測におけるFib-4 indexの有用性2019

    • Author(s)
      高村昌昭、川合弘一、寺井崇二
    • Organizer
      第23回、日本肝臓学会大会(ワークショップ)
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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