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Research for hepatitis A virus host factors using compound and gene knockout libraries

Research Project

Project/Area Number 20K08852
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54030:Infectious disease medicine-related
Research InstitutionNational Institute of Infectious Diseases

Principal Investigator

Suzuki Ryosuke  国立感染症研究所, ウイルス第二部, 室長 (50342902)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsA型肝炎 / A型肝炎ウイルス / 治療薬 / 低分子化合物 / 耐性変異 / 宿主因子 / レプリコン / 抗ウイルス薬
Outline of Research at the Start

A型肝炎ウイルス(HAV)の増殖に関与する宿主因子についてはレセプターを含め同定されておらず、その感染様式や病原性の機序については不明な点が多く残されている。本研究では低分子化合物ライブラリーやCRISPRライブラリーを利用したゲノムワイドな遺伝子ノックアウトライブラリーを用い、HAVが肝細胞で感染/増殖する為に重要な宿主因子を探索、同定し、HAVの感染における宿主との相互作用を明らかにする事である。本研究によってレセプター等の感染に重要な宿主因子が同定され、またそのメカニズムを明らかにする事により、HAV感染による重症化の予防や治療法開発のための研究基盤の確立が期待できる。

Outline of Final Research Achievements

To identify the host factors important for hepatitis A virus (HAV) infection and proliferation, we screened a library of known pharmacologically active compounds with known target proteins. As a result, we identified loxapine, which is approved by the FDA for the treatment of schizophrenia. Loxapine is an inhibitor of the dopamine D2 receptor (DRD2), but because its expression was not observed in hepatocytes where HAV proliferates and replicates, we considered that it may act without mediated DRD2. Analysis of loxapine-resistant virus mutations suggested that it acts directly on the HAV 2C protein. Furthermore, the anti-HAV effect of loxapine was observed not only in cultured cells but also in infected mouse models.

Academic Significance and Societal Importance of the Research Achievements

A型肝炎は、高齢者では症状や肝障害が重い傾向があり、劇症化し死亡する事もある。先進国でも数百人から数万人規模のアウトブレイクが生じ、死亡例も報告されており、感染や発症を制御する必要性が高まっているが、ワクチンはあるものの、特異的治療薬がない。本研究成果は2Cタンパク質が治療薬のターゲットとなる事が明らかとなり、A型肝炎治療薬開発において有用な知見となることが期待される。

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

    (16 results)

All 2024 2023 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (6 results) Book (2 results)

  • [Journal Article] Loxapine inhibits replication of hepatitis A virus in vitro and in vivo by targeting viral protein 2C2024

    • Author(s)
      Matsuda Mami、Hirai-Yuki Asuka、Kotani Osamu、Kataoka Michiyo、Zheng Xin、Yamane Daisuke、Yokoyama Masaru、Ishii Koji、Muramatsu Masamichi、Suzuki Ryosuke
    • Journal Title

      PLOS Pathogens

      Volume: 20 Issue: 3 Pages: e1012091-e1012091

    • DOI

      10.1371/journal.ppat.1012091

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Recent advances in hepatitis A virus research and clinical practice guidelines for hepatitis A virus infection in Japan2023

    • Author(s)
      Kanda Tatsuo、Sasaki‐Tanaka Reina、Ishii Koji、Suzuki Ryosuke、Inoue Jun、Tsuchiya Atsunori、Nakamoto Shingo、Abe Ryuzo、Fujiwara Keiichi、Yokosuka Osamu、Li Tian‐Cheng、Kunita Satoshi、Yotsuyanagi Hiroshi、Okamoto Hiroaki、The AMED HAV and HEV Study Group
    • Journal Title

      Hepatology Research

      Volume: 54 Issue: 1 Pages: 4-23

    • DOI

      10.1111/hepr.13983

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Seroepidemiology of hepatitis A virus infection in Japan, an area of very low endemicity. Microbiology and Immunology, 2023.2023

    • Author(s)
      Kiyohara T, Ishii K, Satake M, Matsubayashi K, Suzuki R, Sugiyama R, Sunagawa T and Masamichi Muramatsu.
    • Journal Title

      Microbiology and Immunology

      Volume: 67 Issue: 1 Pages: 14-21

    • DOI

      10.1111/1348-0421.13035

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] ウイルス性肝炎を見直す A型肝炎・E型肝炎2023

    • Author(s)
      鈴木亮介
    • Journal Title

      小児科

      Volume: 2023 Pages: 7-13

    • Related Report
      2022 Research-status Report
  • [Journal Article] Household transmission of hepatitis A virus after infection of the mother2022

    • Author(s)
      斉藤淳哉、山島美緒、林田稔也、池田智成、石田智士、浦川立貴、岡村卓真、栗林泰隆、山道忍、矢嶌弘之、宮﨑修、本田徹郎、杉山隆一、清原知子、鈴木亮介、森内浩幸、市川辰樹
    • Journal Title

      Kanzo

      Volume: 63 Issue: 11 Pages: 500-503

    • DOI

      10.2957/kanzo.63.500

    • ISSN
      0451-4203, 1881-3593
    • Year and Date
      2022-11-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Macrophage depletion reactivates fecal virus shedding following resolution of acute hepatitis A in Ifnar1-/- mice.2022

    • Author(s)
      Shiota T, Matsuda M, Zheng X, Nagata N, Ishii K, Suzuki R, Muramatsu M, Takimoto K, Hanaki K, Lemon SM, McGivern D, Hirai-Yuki A
    • Journal Title

      Journal of Virology

      Volume: 96 Issue: 23 Pages: 1-14

    • DOI

      10.1128/jvi.01496-22

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Novel flavonoid hybrids as potent antiviral agents against hepatitis A: Design, synthesis and biological evaluation.2022

    • Author(s)
      Shi S, Zheng X, Suzuki R, Li Z, Shiota T, Wang J, Hirai-Yuki A, Liu Q, Muramatsu M, Song SJ
    • Journal Title

      Eur J Med Chem.

      Volume: 238 Pages: 114452-114452

    • DOI

      10.1016/j.ejmech.2022.114452

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] IRF3-mediated pathogenicity in a murine model of human hepatitis A2021

    • Author(s)
      Sun Lu、Li You、Misumi Ichiro、Gonz?lez-L?pez Olga、Hensley Lucinda、Cullen John M.、McGivern David R.、Matsuda Mami、Suzuki Ryosuke、Sen Ganes C.、Hirai-Yuki Asuka、Whitmire Jason K.、Lemon Stanley M.
    • Journal Title

      PLOS Pathogens

      Volume: 17 Issue: 9 Pages: 1-23

    • DOI

      10.1371/journal.ppat.1009960

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 急性A型肝炎が寛解した後も肝臓で長期間持続するウイルスRNA複製:マウスモデルを用いた解析2023

    • Author(s)
      結城明香、塩田智之、松田麻未、Xin Zheng、永田典代、石井孝司、鈴木亮介、村松正道、滝本一広、花木賢一
    • Organizer
      第70回日本実験動物学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Identification of New flavonoid hybrids as potent anti-hepatitis A virus agents.2022

    • Author(s)
      Xin Zheng, Shaochun Shi, Ryosuke Suzuki, Ziyue Li, Jiayin Wang, Qingbo Liu, Shao-Jiang Song, Masamichi Muramatsu.
    • Organizer
      日本薬学会第142年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of novel flavonoid hybrids against hepatitis A.2022

    • Author(s)
      Xin Zheng, Shaochun Shi, Ryosuke Suzuki , Ziyue Li , Jiayin Wang , Asuka Hirai-Yuki , Qingbo Liu , Shao-Jiang Song , Masamichi Muramatsu.
    • Organizer
      第63回臨床ウイルス学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 新規フラボノイド系化合物を用いた抗HAVおよびHCV作用の検討2022

    • Author(s)
      鄭シン、張寒、史紹春、鈴木亮介、塩田智之、結城明香、劉慶博、宋少江、村松正道
    • Organizer
      第69回日本ウイルス学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] レポーター遺伝子を持つ組換えA型肝炎ウイルスを用いた抗ウイルス低分子化合物の探索2021

    • Author(s)
      鈴木亮介、松田麻未、西山直子、小林さくら、鈴木祐成、結城(平井)明香、山根大典、村松正道
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] A型肝炎ウイルスにおける新規抑制剤の開発2021

    • Author(s)
      鄭シン, 史紹春, 鈴木亮介, 結城(平井)明香, 若江亨祥, 劉慶博, 宋少江, 村松正道
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Book] A型肝炎ウイルスのウイルス学的特徴. ウイルス性肝炎学20232023

    • Author(s)
      鈴木亮介
    • Publisher
      日本臨床社
    • Related Report
      2023 Annual Research Report
  • [Book] 小児科 ウイルス性食中毒2020

    • Author(s)
      山下信子、鈴木亮介
    • Total Pages
      6
    • Publisher
      金原出版
    • Related Report
      2020 Research-status Report

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

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