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Identification of novel therapeutic target for liver fibrosis and elucidation of the mechanism

Research Project

Project/Area Number 19H03640
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionNagoya City University

Principal Investigator

Tanaka Yasuhito  名古屋市立大学, 医薬学総合研究院(医学), 客員教授 (90336694)

Co-Investigator(Kenkyū-buntansha) 佐藤 悠介  北海道大学, 薬学研究院, 助教 (10735624)
大石 久史  名古屋市立大学, 医薬学総合研究院(医学), 教授 (30375513)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords肝線維化 / TLL1 / TGFβ / miR-6133-5p / MEND / HCV / miRNA / LNP / 肝臓線維化
Outline of Research at the Start

わが国で肝細胞癌の発症要因として最も多いC型肝炎ウイルス(HCV)感染症の治療は飛躍的に進歩し、ほぼ全例でウイルス排除が可能となった一方で、肝線維化進展例では肝発癌リスクが高いままであり、その対策が重要な課題である。最近我々は、Tolloid-like 1(TLL1)遺伝子多型がHCV排除後の肝発癌に関連し、肝線維化に寄与することを突き止めた。さらに、コラーゲン遺伝子の発現を強力に抑制するmiRNA6133を新たに同定した。本研究は、肝線維化・発癌制御を目指した新たな治療法の開発を目的として、TLL1による肝線維化メカニズムの解析およびmiR6133標的分子の同定と機能解析を行う。

Outline of Final Research Achievements

Liver fibrosis is an important risk factor for the development of hepatocellular carcinoma (HCC) in patients with after hepatitis C virus (HCV) eradication or with steatohepatitis. In this study, we investigated the mechanisms of liver fibrosis and hepatocarcinogenesis by TGFβ and TLL1, as well as by miR-6133-5p, which suppresses collagen gene expression. MiR-6133-5p was found to inhibit phosphorylation of major intracellular signal transduction pathways and act upstream of JNK. In addition, we have established lines of transgenic mice with the hepatocyte-specific overexpression of hTLL1. For siRNA-loaded lipid nanoparticles (LNP) by iLiNP microfluidic device, we identified the optimal LNPs and verified the safety in mouse liver.

Academic Significance and Societal Importance of the Research Achievements

HCV感染症の治療は飛躍的に進歩し、ほぼ全例でウイルス排除が達成可能となった。しかし、肝線維化進展例ではHCV排除後も肝発癌リスクが高く、脂肪肝炎を含む他の慢性肝炎においても線維化は予後不良因子となるため、肝線維化の制御は重要な課題である。本研究成果から、miR-6133-5pの抗線維化効果がTGFBR2およびJNKによって媒介されることを示した。肝細胞特異的hTLL1高発現マウスを樹立し、長期間のコリン欠乏高脂肪食給餌により肝癌を誘発させるマウスモデルを確立した。さらに、肝細胞をターゲットとしたLNPの開発により、肝細胞のみに薬剤を直接作用させる身体に負担の少ない治療への展開が期待される。

Report

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

    (12 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] C型肝炎治療後の肝発癌とTLL1遺伝子多型2020

    • Author(s)
      松浦 健太郎, 田中 靖人
    • Journal Title

      医学のあゆみ

      Volume: 274 Pages: 359-360

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Inhibitory Effect of a Human MicroRNA, miR-6133-5p, on the Fibrotic Activity of Hepatic Stellate Cells in Culture2020

    • Author(s)
      Hamada-Tsutsumi Susumu、Onishi Masaya、Matsuura Kentaro、Isogawa Masanori、Kawashima Keigo、Sato Yusuke、Tanaka Yasuhito
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 19 Pages: 7251-7251

    • DOI

      10.3390/ijms21197251

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tolloid‐Like 1 Negatively Regulates Hepatic Differentiation of Human Induced Pluripotent Stem Cells Through Transforming Growth Factor Beta Signaling.2020

    • Author(s)
      Kiso A, Toba Y, Tsutsumi S, Deguchi S, Igai K, Koshino S, Tanaka Y, Takayama K, Mizuguchi H
    • Journal Title

      Hepatology Communications

      Volume: 4 Issue: 2 Pages: 255-267

    • DOI

      10.1002/hep4.1466

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] TLL1 variant associated with development of hepatocellular carcinoma after eradication of hepatitis C virus by interferon-free therapy.2019

    • Author(s)
      Iio E, Matsuura K (co-first author), Shimada N, Atsukawa M, Itokawa N, Abe H, Kato K, Takaguchi K, Senoh T, Eguchi Y, Nomura H, Yoshizawa K, Kang JH, Matsui T, Hirashima N, Kusakabe A, Miyaki T, Fujiwara K, Matsunami K, Tsutsumi S, Iwakiri K, Tanaka Y.
    • Journal Title

      J Gastroenterol.

      Volume: 54 Issue: 4 Pages: 339-346

    • DOI

      10.1007/s00535-018-1526-3

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] マイクロ流体デバイスによる脂質ナノ粒子の粒径制御とin vivo RNA送達2022

    • Author(s)
      佐藤悠介, 奥田健斗, 岩川和樹, 佐々木宏輔, 原島秀吉
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Tolloid-like 1(TLL1)欠損ヒトiPS細胞を用いた肝分化過程におけるTLL1の機能解析2021

    • Author(s)
      水口裕之, 田中靖人
    • Organizer
      第57回日本肝臓学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脂質ナノ粒子の粒子径増大技術の確立とその有用性の検討2021

    • Author(s)
      奥田健斗, 佐藤悠介, 岩川和樹, 原島秀吉
    • Organizer
      日本薬学会北海道支部第148回例会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脂質ナノ粒子の粒子径制御技術の確立と有用性の検討2021

    • Author(s)
      奥田健斗, 佐藤悠介, 岩川和樹, 原島秀吉
    • Organizer
      日本核酸医薬学会第6回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] mRNA ワクチンへの応用を目指した脂質ナノ粒子の粒子径制御技術の確立2021

    • Author(s)
      奥田健斗, 佐藤悠介, 岩川和樹, 原島秀吉
    • Organizer
      第42回生体膜と薬物の相互作用シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Efficient delivery of macromolecules by molecular design of cationic lipids.2019

    • Author(s)
      Sato Y, Hashiba K, Hashiba A, Okabe N, Harashima H.
    • Organizer
      Liposome Research Days 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Predictors of hepatocellular carcinoma development after eradication of hepatitis C virus based on TLL1 variant, AFP and FIB 4 index.2019

    • Author(s)
      Iio E, Matsuura K, Shimada N, Atsukawa M, Takaguchi K, Eguchi Y, Nomura H, Itokawa N, Abe H, Senoh T, Kato K, Matsui T, Kang JH, Kusakabe A, Miyaki T, Hirashima N, Fujiwara K, Tanaka Y
    • Organizer
      The 70th Annual Meeting of the American Association for the Study of Liver Diseases
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Functional analysis of Tolloid-like 1(TLL1) in the hepatic differentiation using TLL1-deficient human induced pluripotent stem cells,2019

    • Author(s)
      Kiso A, Toba Y, Tsutsumi S, Igai K, Koshino S, Takayama K, Tanaka Y, Mizuguchi H
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Annual Research Report

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

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