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Evaluation of mitochondrial DNA copy number and function in hepatocyte of non-alcoholic steatohepatitis in mice

Research Project

Project/Area Number 20K16983
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Arao Yoshihisa  新潟大学, 医歯学総合病院, 特任准教授 (40870142)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
KeywordsMASH / ミトコンドリア / DNA copy number / マイトファジー / 脂肪肝 / ミトコンドリアDNAコピー数 / NAFLD / NASH / NAFL / MC4R-KOマウス
Outline of Research at the Start

メタボリック症候群の増加に伴ってNAFLDが増加し、病態の解析と治療法の開発が課題である。活性酸素による酸化ストレスは原因の一つであり、その影響を受けやすいミトコンドリアDNA(mtDNA)コピー数の変化は、病態のマーカー、重症度などとの関連が示唆されるが、未だに明らかとなっていない。そこで、本研究では、種々のNASHのモデルマウスを用いて肝組織や全身の状態変化とmtDNAコピー数、ミトコンドリアの形態・機能や、ミトコンドリアの品質保持マイトファジーの経時的な変化を検証する。本研究により、NAFLDにおけるmtDNAの変化と病態への関与を明らかにし、マーカー治療対象としての有用性を検証する。

Outline of Final Research Achievements

Mitophagy reporter mice were treated with normal diet, MCD, and HFD to evaluate fat and fibrosis, but no significant changes were observed. For observation of mCherry alone, which suggests mitophagy, quenching treatment was performed, but stable observation could not be established due to autofluorescence. q-PCR was used to evaluate BNIP3 and BNIP3L, and their expression was decreased in HFD and MCD. ATP assay was performed as a functional evaluation, showing a decreasing trend in HFD and MCD. Western blotting and immunofluorescence stained images were used to evaluate BNIP3 and other proteins, but no significant differences were observed. The study was terminated because it was deemed difficult to continue the study any further.

Academic Significance and Societal Importance of the Research Achievements

メタボリック症候群や肥満の増加に伴って日本でも代謝機能不全に関連した脂肪肝炎(MASH:Metabolic dysfunction associated steatohepatitis)が増加している。脂肪肝炎から肝硬変への進展における肝細胞において、活性酸素による酸化ストレスは原因の一つであり、その影響を受けやすいミトコンドリアDNA(mtDNA)コピー数の変化は、病態のマーカー、重症度などとの関連が示唆されているが、未だ明らかとなっていない。mtDNAコピー数による効率的なMSAHの新規マーカーの有用性を見出そうとしたが、今回の研究では探索することが困難であった。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results)

  • [Journal Article] Esophageal Ulcers Associated with Ulcerative Colitis: A Case Series and Literature Review2020

    • Author(s)
      Tominaga Kentaro、Tsuchiya Atsunori、Sato Hiroki、Mizusawa Takeshi、Morita Shinichi、Ishii Yui、Takeda Nobutaka、Natsui Kazuki、Kawata Yuzo、Kimura Naruhiro、Arao Yoshihisa、Takahashi Kazuya、Hayashi Kazunao、Yokoyama Junji、Terai Shuji
    • Journal Title

      Internal Medicine

      Volume: 59 Issue: 16 Pages: 1983-1989

    • DOI

      10.2169/internalmedicine.4437-20

    • NAID

      130007887680

    • ISSN
      0918-2918, 1349-7235
    • Year and Date
      2020-08-15
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rare case of circumferential esophageal peeling2020

    • Author(s)
      Tominaga Kentaro、Tsuchiya Atsunori、Sato Hiroki、Ishii Yui、Takeda Nobutaka、Natsui Kazuki、Kawata Yuzo、Kimura Naruhiro、Arao Yoshihisa、Takeuchi Suguru、Hayashi Kazunao、Yokoyama Junji、Terai Shuji
    • Journal Title

      Clinical Case Reports

      Volume: 8 Issue: 7 Pages: 1306-1308

    • DOI

      10.1002/ccr3.2846

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of methionine/choline-deficient diet and high-fat diet-induced steatohepatitis on mitochondrial homeostasis in mice2020

    • Author(s)
      Arao Yoshihisa、Kawai Hirokazu、Kamimura Kenya、Kobayashi Takamasa、Nakano Oki、Hayatsu Manabu、Ushiki Tatsuo、Terai Shuji
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 527 Issue: 2 Pages: 365-371

    • DOI

      10.1016/j.bbrc.2020.03.180

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Efficacy and Safety of the Radiotherapy for Liver Cancer: Assessment of Local Controllability and Its Role in Multidisciplinary Therapy2020

    • Author(s)
      Ohkoshi-Yamada M, Kamimura K, et al.
    • Journal Title

      Cancers

      Volume: 12 Issue: 10 Pages: 2955-2955

    • DOI

      10.3390/cancers12102955

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Daily Monitoring of Serum <i>Wisteria floribunda</i> Agglutinin-Positive Mac-2 Binding Protein Is Useful for Predicting Therapeutic Effect of Tolvaptan in Cirrhotic Ascites2020

    • Author(s)
      Takamura Masaaki、Sakamaki Akira、Arao Yoshihisa、Setsu Toru、Kamimura Hiroteru、Yokoo Takeshi、Kamimura Kenya、Tsuchiya Atsunori、Terai Shuji
    • Journal Title

      The Tohoku Journal of Experimental Medicine

      Volume: 252 Issue: 4 Pages: 287-296

    • DOI

      10.1620/tjem.252.287

    • NAID

      130007940821

    • ISSN
      0040-8727, 1349-3329
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2020-04-28   Modified: 2025-01-30  

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