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Elucidation of the mechanism of hepatocarcinogenesis suppression by mitochondrial ferritin

Research Project

Project/Area Number 21K07995
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionKawasaki Medical School

Principal Investigator

HARA YUICHI  川崎医科大学, 医学部, 特任研究員 (60550952)

Co-Investigator(Kenkyū-buntansha) 日野 啓輔  川崎医科大学, 医学部, 特任研究員 (80228741)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsmitochondria / mitophagy / HCC / ミトコンドリア / マイトファジー / FTMT / ミトコンドリアフェリチン / バイオマーカー
Outline of Research at the Start

肝細胞癌は成因別に特化した遺伝子変異の蓄積もないことが明らかにされ、従来とは異なる観点からの治療開発が必要である。活性酸素種(ROS)は肝発癌に関与するが、ROSの産生機構として、ミトコンドリア修復機構の障害が重要であること報告してきた。これらの報告の中で我々はミトコンドリアフェリチン(FTMT)がミトコンドリアの修復機構であるmitophagyのkey moleculeであることを同定し、発癌抑制にFTMTが関与することも明らかにした。本研究ではFTMTの関与する発癌抑制の分子機構を解明し、FTMTを介した新たな肝細胞癌治療を開発する。

Outline of Final Research Achievements

When the muscle mass of mice with hepatocarcinoma was evaluated based on muscle weight relative to body weight (muscle weight (mg)/body weight (g)), the average muscle weight (mg)/body weight (g) of this mouse model was 2.12, but when DFP was added to this mouse model, it significantly increased to 2.91 (p<0.05). Furthermore, when DFP was added to this mouse model in which mitophagy was specifically inhibited in the liver, muscle weight (mg)/body weight (g) decreased to 2.01, with no significant difference from control mice. Furthermore, compared with mice with hepatocarcinoma that were applied with (DMBA) and fed a high-fat diet, serum selenoprotein P in a model in which DFP was added was significantly reduced to 0.62-fold (<0.05). Furthermore, in a model in which mitophagy was specifically suppressed in the liver, serum selenoprotein P was 1.12-fold, not significantly different from untreated mice.

Academic Significance and Societal Importance of the Research Achievements

FTMTは以前からその存在は知られていたが、その発現機構及び機能についてはほとんど知られていない。肝発癌過程でのFTMTの発現の意義については未だ不明である。本研究でその機構が明らかになれば世界で初めての知見となる。 またFTMTの発現を促す薬剤は鉄キレート剤のみしか明らかになっていないが、鉄キレート剤はその副作用として、貧血を引き起こすことが予想される。この研究により、FTMT の発現を促す薬剤が明らかとなれば、安全で発癌抑制を期待できる薬剤が開発できることになる。FTMT発現誘導による肝発がん抑制はこれまで行われておらず、これもまた世界で初めての試みである。

Report

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

    (4 results)

All 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results)

  • [Journal Article] Iron and liver cancer: an inseparable connection2021

    • Author(s)
      Hino Keisuke、Yanatori Izumi、Hara Yuichi、Nishina Sohji
    • Journal Title

      The FEBS Journal

      Volume: - Issue: 24 Pages: 7810-7829

    • DOI

      10.1111/febs.16208

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nanoparticle-Mediated Delivery of 2-Deoxy-D-Glucose Induces Antitumor Immunity and Cytotoxicity in Liver Tumors in Mice2021

    • Author(s)
      Sasaki Kyo、Nishina Sohji、Yamauchi Akira、Fukuda Kotaro、Hara Yuichi、Yamamura Masahiro、Egashira Kensuke、Hino Keisuke
    • Journal Title

      Cellular and Molecular Gastroenterology and Hepatology

      Volume: 11 Issue: 3 Pages: 739-762

    • DOI

      10.1016/j.jcmgh.2020.10.010

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Correlation of hepatitis C virus-mediated endoplasmic reticulum stress with autophagic flux impairment and hepatocarcinogenesis2021

    • Author(s)
      Honma Yuichi、Miyagawa Koichiro、Hara Yuichi、Hayashi Tsuguru、Kusanaga Masashi、Ogino Noriyoshi、Minami Sota、Oe Shinji、Ikeda Masanori、Hino Keisuke、Harada Masaru
    • Journal Title

      Medical Molecular Morphology

      Volume: - Issue: 2 Pages: 108-121

    • DOI

      10.1007/s00795-020-00271-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Long-term phlebotomy successfully alleviated hepatic iron accumulation in a ferroportin disease patient with a mutation in SLC40A1: A case report.2021

    • Author(s)
      Nishina S, Tomiyama Y, Ikuta K, Tatsumi Y, Toki Y, Kato A, Kato K, Yoshioka N, Sasaki K, Hara Y, Hino K.
    • Journal Title

      BMC Gastroenterology

      Volume: 21(1) Issue: 1 Pages: 111-111

    • DOI

      10.1186/s12876-021-01674-z

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2021-04-28   Modified: 2025-01-30  

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