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Elucidation of Molecular Pathogenesis in Childhood-Onset Liver Failure

Research Project

Project/Area Number 20K08251
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Imagawa Kazuo  筑波大学, 医学医療系, 講師 (40708509)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords肝不全 / 急性肝炎 / 小児 / ゲノム解析 / 急性肝不全 / 遺伝性胆汁うっ滞症 / エクソーム解析 / エクソーム / 遺伝子変異 / 遺伝子発現
Outline of Research at the Start

小児期に発症する肝不全の原因疾患は多岐にわたる。しかし、その多くは原因不明で肝移植以外に治療法がない劇症肝不全も含まれる。原因疾患の特定や、分子レベルでの病態理解のために疾患関連遺伝子の探索研究が進むことで、病態理解ひいては治療法開発に応用が期待できる。本研究では、病態の主座である肝臓組織の発現データの解析とゲノムデータを合わせて小児期に発症する肝不全の原因を探索する。

Outline of Final Research Achievements

There are a wide variety of causative diseases of acute hepatitis and subsequent acute liver failure that occur in childhood. However, the cause is still unknown in about half of the cases, and there is no effective treatment other than liver transplantation in cases of fulminant cases. There are many different types of hepatitis, including cases with abnormalities in molecular mechanisms involved in liver metabolism and excretion, and immunogenic hepatitis pathologies triggered by infections and other diseases. Identification of the cause and understanding of the pathogenesis at the molecular level remain unknown. In this study, we performed genome analysis of patients to search for causative genes. We diagnosed diseases that can cause liver failure in childhood, such as progressive familial intrahepatic cholestasis. In addition, activated CD8-positive T cells proliferated in peripheral blood in some cases, and CD8-positive T cells were increased in liver pathology.

Academic Significance and Societal Importance of the Research Achievements

肝不全を呈する小児における原因検索でゲノム解析が有用であることが示唆された。本研究の過程で免疫原性と思われる急性肝炎の小児において免疫解析を実施したところ、末梢血で活性化CD8陽性T細胞が増殖し、肝臓病理でCD8陽性T細胞が増加していた。なんらかの過剰な免疫応答が急性肝炎の主病態の一つであることが示唆された。これらのように、約半数以上で不明とされる小児の急性肝炎や肝不全における分子レベルでの原因検索方法について本研究で見出すことが出来た。

Report

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

    (12 results)

All 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (6 results) (of which Invited: 1 results)

  • [Journal Article] Immunological characteristics of severe acute hepatitis of unknown origin in a child post SARS-CoV-2 infection2022

    • Author(s)
      Morita Atsushi、Imagawa Kazuo、Asayama Kei、Terakado Tsubasa、Takahashi Shoko、Yaita Katsuyuki、Tagawa Manabu、Matsubara Daisuke、Takada Hidetoshi
    • Journal Title

      Clinical Immunology

      Volume: 245 Pages: 109138-109138

    • DOI

      10.1016/j.clim.2022.109138

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel <i>BMPR1A</i> mutation affects mRNA splicing in juvenile polyposis syndrome2022

    • Author(s)
      Imagawa Kazuo、Morita Atsushi、Fukushima Hiroko、Tagawa Manabu、Takada Hidetoshi
    • Journal Title

      Pediatrics International

      Volume: 64 Issue: 1

    • DOI

      10.1111/ped.15041

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Kawasaki disease with dilatation of the common bile duct: A case report and review of literature2021

    • Author(s)
      Morita Atsushi、Imagawa Kazuo、Ishiodori Takumi、Tagawa Manabu、Takada Hidetoshi
    • Journal Title

      International Journal of Rheumatic Diseases

      Volume: 24 Issue: 10 Pages: 1325-1330

    • DOI

      10.1111/1756-185x.14208

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 【膵と胆道の先天性形成異常~発生から臨床まで~】アラジール症候群2021

    • Author(s)
      今川 和生
    • Journal Title

      胆と膵

      Volume: 42 Pages: 973-977

    • Related Report
      2021 Research-status Report
  • [Journal Article] Abdominal aortic thrombus formation in a neonate with an interrupted aortic arch2021

    • Author(s)
      Yuhara Yuka、Kido Takahiro、Imagawa Kazuo、Yano Yusuke、Nozaki Yoshihiro、Ishiodori Takumi、Ishikawa Nobuyuki、Kato Hideyuki、Kato Yoshiaki、Takahashi‐Igari Miho、Murakami Takashi、Horigome Hitoshi、Takada Hidetoshi
    • Journal Title

      Clinical Case Reports

      Volume: - Issue: 4 Pages: 1943-1947

    • DOI

      10.1002/ccr3.3911

    • NAID

      120007185390

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endoscopic retrograde cholangiopancreatography and endoscopic ultrasound in children2021

    • Author(s)
      Tagawa M, Morita A, Imagawa K, Mizokami Y
    • Journal Title

      Dig Endosc

      Volume: 未定 Issue: 7 Pages: 1045-1058

    • DOI

      10.1111/den.13928

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] アラジール症候群2022

    • Author(s)
      今川和生
    • Organizer
      日本肝臓学会 School of Hepatology 2022 in Tokyo
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Fontan術後肝疾患の小児期スクリーニング体制の構築2022

    • Author(s)
      今川和生, 森田篤志, 田川学
    • Organizer
      第58回日本肝臓学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] SARS-CoV-2感染後に発症した原因不明急性肝炎の小児例における末梢血免疫表現型解析2022

    • Author(s)
      今川和生、森田篤志、田川学
    • Organizer
      第49回日本小児栄養消化器肝臓学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 東南アジア地域における原因不明胆汁うっ滞小児に対するゲノム解析2021

    • Author(s)
      今川和生、伊藤彰悟、戸川貴夫、伊藤孝一、齋藤伸治、林久允
    • Organizer
      第48回日本小児栄養消化器肝臓学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 胆汁うっ滞を伴う早産児・低出生体重児における遺伝学的解析2021

    • Author(s)
      今川和生、戸川貴夫、伊藤彰悟、伊藤孝一、水野忠快、林久允、高田英俊、斎藤伸治
    • Organizer
      第124回日本小児科学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 肝不全で発症した若年性骨髄単球性白血病に少量シタラビン療法で移植前治療を行った一例2020

    • Author(s)
      長友公美絵、福島紘子、鈴木涼子、八牧愉二、今川 和生、加藤元博、須川 正啓、高田英俊
    • Organizer
      第62回日本小児血液がん学会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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