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Role of the immunoproteasome in nonalcoholic steatohepatitis

Research Project

Project/Area Number 20K07365
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionKyushu University of Health and Welfare

Principal Investigator

Kimura Hiroaki  九州保健福祉大学, 薬学部, 教授 (70593622)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords免疫プロテアソーム / LMP2 / LMP7 / 非アルコール性脂肪性肝炎 / NASH / 炎症 / 脂肪肝 / マクロファージ / 肝機能 / 脂肪性肝炎 / 脂肪蓄積
Outline of Research at the Start

非アルコール性脂肪性肝炎(Non-alcoholic steatohepatitis: NASH)は、アルコール摂取に依存しない脂肪肝から炎症・線維化を伴う病態で、有効な治療方法が確立されていない。肥満において、免疫プロテアソームが脂肪の蓄積や炎症に関わるため、NASH病態にも免疫プロテアソームが関与する可能性がある。本研究では、NASH病態の肝臓組織内各細胞における免疫プロテアソームの発現量と、その欠損や阻害による脂肪蓄積や炎症への効果を検討し、さらに阻害剤によるマウスでの治療効果も検討することよって、NASH病態における免疫プロテアソームの役割を解明し、新たな治療法の開発につなげる。

Outline of Final Research Achievements

The goal of the study is to unveil the role of the immunoproteasome enzyme subunits, LMP2 and LMP7 in the pathogenesis of non-alcoholic steatohepatitis (NASH). We used LMP2 and LMP7 knockout mice, because the enzymatic activity between LMP2 and LMP7 is different. When we induced NASH in the mice, we found differences of the disease grade between those mice. LMP7 had promotive role in the early stage of the NASH pathogenesis. On the other hand, LMP2 had protective role in the early stage of the NASH pathogenesis. Both mice developed similar level of staeatosis and mononuclear cell (MNCs) infiltrations. However, the population of MNCs seemed different. The detail of the population should be identified. We assessed if the immunoproteasome influences lipid accumulation in hepatocytes in vitro using inhibitors and gene-knokckout technology. How ever we found the immunoprotesome didn't influence the accumulation.

Academic Significance and Societal Importance of the Research Achievements

我々の結果は、学術的にはおもしろい発見であるといえる。以前に橋本病モデルでも得られたのだが、LMP2とLMP7の役割が正反対であった。これらの分子は、プロテアソームに組み込まれる前に前駆体として存在し、自身の酵素活性で自己切断する。つまり、プロテアソームに組み込まれる前にも酵素活性を持っていることから何かしらユニークな制御があると考えられる。また、社会的にも、貢献できる可能性がある。LMP7がNASH発症に誘導的に働くことから、予防として阻害剤の利用が可能かどうか調べることによって、新規予防/治療法の可能性を見出したと言える。

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

    (8 results)

All 2023 2022 2020

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 4 results)

  • [Journal Article] Amino acid polymorphisms in human histocompatibility leukocyte antigen class II and proinsulin epitope have impacts on type 1 diabetes mellitus induced by immune-checkpoint inhibitors2023

    • Author(s)
      Inaba Hidefumi、Morita Shuhei、Kosugi Daisuke、Asai Yuki、Kaido Yosuke、Ito Saya、Hirobata Tomonao、Inoue Gen、Yamamoto Yuki、Jinnin Masatoshi、Kimura Hiroaki、Ota Masao、Okudaira Yuko、Nakatani Hiroyasu、Kobayashi Tomoko、Iwama Shintaro、Arima Hiroshi、Matsuoka Takaaki
    • Journal Title

      Frontiers in Immunology

      Volume: 14 Pages: 1165004-1165004

    • DOI

      10.3389/fimmu.2023.1165004

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Human Leukocyte Antigens and Biomarkers in Type 1 Diabetes Mellitus Induced by Immune-Checkpoint Inhibitors2022

    • Author(s)
      Inaba Hidefumi、Kaido Yosuke、Ito Saya、Hirobata Tomonao、Inoue Gen、Sugita Takakazu、Yamamoto Yuki、Jinnin Masatoshi、Kimura Hiroaki、Kobayashi Tomoko、Iwama Shintaro、Arima Hiroshi、Matsuoka Takaaki
    • Journal Title

      Endocrinology and Metabolism

      Volume: 37 Issue: 1 Pages: 84-95

    • DOI

      10.3803/enm.2021.1282

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deletion of inflammasome adaptor protein ASC enhances functional recovery after spinal cord injury in mice2020

    • Author(s)
      Shiraishi Yasuyuki、Kimura Atsushi、Kimura Hiroaki、Ohmori Tsukasa、Takahashi Masafumi、Takeshita Katsushi
    • Journal Title

      Journal of Orthopaedic Science

      Volume: 20 Issue: 3 Pages: 30124-30124

    • DOI

      10.1016/j.jos.2020.04.006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] ASC regulates platelet activation and contributes to thrombus formation independent of NLRP3 inflammasome2020

    • Author(s)
      Watanabe Sachiko、Usui-Kawanishi Fumitake、Komada Takanori、Karasawa Tadayoshi、Kamata Ryo、Yamada Naoya、Kimura Hiroaki、Dezaki Katsuya、Ohmori Tsukasa、Takahashi Masafumi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 531 Issue: 2 Pages: 125-132

    • DOI

      10.1016/j.bbrc.2020.07.063

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] NLRP3 Inflammasome Activation in Lung Vascular Endothelial Cells Contributes to Intestinal Ischemia/Reperfusion-Induced Acute Lung Injury2020

    • Author(s)
      Ito Homare、Kimura Hiroaki、Karasawa Tadayoshi、Hisata Shu、Sadatomo Ai、Inoue Yoshiyuki、Yamada Naoya、Aizawa Emi、Hishida Erika、Kamata Ryo、Komada Takanori、Watanabe Sachiko、Kasahara Tadashi、Suzuki Takuji、Horie Hisanaga、Kitayama Joji、Sata Naohiro、Yamaji-Kegan Kazuyo、Takahashi Masafumi
    • Journal Title

      The Journal of Immunology

      Volume: 205 Issue: 5 Pages: 1393-1405

    • DOI

      10.4049/jimmunol.2000217

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glucose regulates hypoxia-induced NLRP3 inflammasome activation in macrophages.2020

    • Author(s)
      1)Watanabe S, Usui-Kawanishi F, Karasawa, Kimura H, Kamata R, Inoue, Mise N, Kasahara T, Takahashi M
    • Journal Title

      J Cell Physiol

      Volume: - Issue: 10 Pages: 7554-7566

    • DOI

      10.1002/jcp.29659

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Iron overload as a risk factor for hepatic ischemia-reperfusion injury in liver transplantation: potential role of ferroptosis.2020

    • Author(s)
      3)Yamada N, Karasawa T, Wakiya T, Sadatomo A, Ito H, Kamata R, Watanabe S, Komada T, Kimura H, Sanada Y, Sakuma Y, Mizuta K, Sata N, Takahashi M
    • Journal Title

      Am J Transplant

      Volume: - Issue: 6 Pages: 1606-1618

    • DOI

      10.1111/ajt.15773

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Immunoproteasome2020

    • Author(s)
      Kimura Hiroaki
    • Journal Title

      eLS (encyclopedia of Life Sciences)

      Volume: - Pages: 1-9

    • DOI

      10.1002/9780470015902.a0026244

    • Related Report
      2020 Research-status Report
    • Peer Reviewed

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

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