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Exploration of innovative HBV inhibitors based on a bidirectional approach using structure prediction and in vitro assay systems

Research Project

Project/Area Number 19K05734
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 37030:Chemical biology-related
Research InstitutionOsaka University

Principal Investigator

Ohsaki Eriko  大阪大学, 大学院医学系研究科, 助教 (50447801)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsB型肝炎ウイルス / ポリメラーゼ / 逆転写酵素 / 立体構造解析 / スクリーニング / 非核酸系RT阻害剤 / 核酸アナログ / HBV / polymerase / RT / NNRTI / ドッキングシミュレーション / 非核酸系RT阻害剤阻害剤 / 立体構造予測 / モデル解析
Outline of Research at the Start

研究代表者はB型肝炎ウイルスのポリメラーゼ活性に重要なRTドメインの高純度精製,および精製RTを用いた特異的活性測定系の確立に成功し,スクリーニングにより多数のRT阻害候補薬剤を同定した。本研究では候補阻害剤とRTとの相互作用について,立体構造予測に基づくドッキングシミュレーションにより解析し,作用機序の解明および複数の薬剤の組み合わせによる高活性阻害剤の設計を行う。さらには活性測定システムにより,シミュレーションで得られた候補阻害薬剤との相互作用を実際に検証し最適化することで,耐性変異のすきを与えずに迅速・顕著なウイルス排除を可能とするような,これまでにない画期的治療薬の創出を目指す。

Outline of Final Research Achievements

In this study, we proposed a molecular model of the reverse transcriptase (RT) domain of hepatitis B virus (HBV) polymerase and attempted to find compounds with high binding affinity to RT by structure-based in silico screening. The obtained hit compounds were evaluated for their inhibitory effects by an in vitro assay system using highly purified RT, and we succeeded in identifying compounds that showed inhibitory effects. Furthermore, we predicted the binding site by docking simulation, examined the compound combination, and found that additive and synergistic inhibitory effects were obtained by combining the compounds.

Academic Significance and Societal Importance of the Research Achievements

B型肝炎ウイルス(HBV)の持続感染者は,2019年の推計では世界で約3億人の持続感染者が存在し年間約89万人が死亡しており,治療薬開発は重要な課題である。薬剤開発において標的分子の立体構造データは必須であるが, HBVポリメラーゼの立体構造はウイルス発見から約60年近く経過した今なお解かれていない。本研究により予測分子モデルおよびシミュレーションの精度が期待以上に高いことが示唆され,薬剤探索の有用なツールとなることが示唆された。また,逆転写酵素(RT)ドメインの結晶化に世界で初めて成功し,立体構造の完全解明の日も近く,本研究の成果が薬剤開発の情報基盤の構築に貢献するものと確信する。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (21 results)

All 2022 2021 2020 2019

All Journal Article (10 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (6 results) Book (5 results)

  • [Journal Article] 立体構造を基盤としたHBVポリメラーゼ阻害剤の開発2022

    • Author(s)
      大﨑恵理子,上田啓次
    • Journal Title

      Medical Science Digest

      Volume: 47 Pages: 752-754

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Journal Article] Chronic Hepatitis B Treatment Strategies Using Polymerase Inhibitor-Based Combination Therapy2021

    • Author(s)
      Ohsaki Eriko、Suwanmanee Yadarat、Ueda Keiji
    • Journal Title

      Viruses

      Volume: 13 Issue: 9 Pages: 1-10

    • DOI

      10.3390/v13091691

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 新型コロナウイルスに対する畜産動物の感受性に関する文献考察2021

    • Author(s)
      水野信哉, 大﨑恵理子
    • Journal Title

      アグリバイオ

      Volume: 1 Pages: 94-97

    • Related Report
      2021 Research-status Report
  • [Journal Article] Molecular and Cellular Interactions Between the Host and Herpesviruses2021

    • Author(s)
      Eriko Ohsaki, Keiji Ueda
    • Journal Title

      Frontiers

      Volume: 11 Pages: 21-28

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Screening and Evaluation of Novel Compounds against Hepatitis B Virus Polymerase Using Highly Purified Reverse Transcriptase Domain2020

    • Author(s)
      Ohsaki Eriko、Ueda Keiji
    • Journal Title

      Viruses

      Volume: 12 Issue: 8 Pages: 840-840

    • DOI

      10.3390/v12080840

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of the interaction of hepatitis B virus with mitochondria and associated proteins.2020

    • Author(s)
      Hossain MG, Akter S, Ohsaki E, Ueda K.
    • Journal Title

      Viruses

      Volume: 12 Issue: 2 Pages: 1-15

    • DOI

      10.3390/v12020175

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complete Genome Sequence of a Precore-Defective Hepatitis B Virus Genotype D2 Strain Isolated in Bangladesh2020

    • Author(s)
      Hossain Md Golzar、Mahmud Md Muket、Rahman Md Arifur、Akter Sharmin、Nazir K. H. M. Nazmul Hussain、Saha Sukumar、Wada Masami、Ohsaki Eriko、Honda Tomoyuki、Ueda Keiji
    • Journal Title

      Microbiology Resource Announcements

      Volume: 9 Issue: 11

    • DOI

      10.1128/mra.00083-20

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Establishment of a system for finding inhibitors of ε RNA binding with the HBV polymerase2020

    • Author(s)
      Liu Xiao‐Quan、Ohsaki Eriko、Ueda Keiji
    • Journal Title

      Genes to Cells

      Volume: 25 Issue: 8 Pages: 523-537

    • DOI

      10.1111/gtc.12778

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interplay Between KSHV and the Host DNA Damage Response2020

    • Author(s)
      Ohsaki Eriko、Ueda Keiji
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 10 Pages: 604351-604351

    • DOI

      10.3389/fcimb.2020.604351

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complete Genome Sequence of a Pre-core-Defective Hepatitis B Virus Genotype D2 Strain Isolated in Bangladesh2020

    • Author(s)
      Md. Golzar Hossain, Md Muket Mahmud, Md. Arifur Rahman, Sharmin Akter, K.H.M. Nazmul Nazir, Sukumar Saha, Masami Wada, Eriko Ohsaki, Tomoyuki Honda, and Keiji Ueda
    • Journal Title

      The American Society for Microbiology

      Volume: 9 Pages: 303-349

    • DOI

      10.1016/b978-0-12-374153-0.00015-1

    • ISBN
      9780123741530
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] B型肝炎ウイルスポリメラーゼ阻害剤のスクリーニングと薬剤評価2022

    • Author(s)
      Eriko Ohsaki, Kazuhiro Murai, Hayato Hikita, Masami Wada, Keiji Ueda
    • Organizer
      第69回日本ウイルス学会 学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] UPF1もしくはStaufen1を介した細胞内因性RNA分解機構は,HBV RNAの安定性を介してウイルス複製を制御する2022

    • Author(s)
      Masami Wada, Eriko Ohsaki, Keiji Ueda
    • Organizer
      第69回日本ウイルス学会 学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 1.Virtual screening and docking analysis of hits with the reverse transcriptase domain of HBV polymerase.2021

    • Author(s)
      Eriko Ohsaki, Yadarat Suwanmanee, Masami Wada, Keiji Ueda
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 2.Regulation of HBV RNAs by nonsense-mediated mRNA decay pathway controls viral replication.2021

    • Author(s)
      Masami Wada, Eriko Ohsaki, Keiji Ueda.
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Evaluation of novel candidate NNRTIs against Hepatitis B virus2019

    • Author(s)
      Eriko Ohsaki, Yadarat Suwanmanee, Keiji Ueda
    • Organizer
      第67回日本ウイルス学会 学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Novel non-nucleo(s)tide RT inhibitor candidates reducing HBV DNA amplification.2019

    • Author(s)
      Eriko Ohsaki, Yadarat Suwanmanee, Keiji Ueda
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Book] 新型コロナウイルスに対する畜産動物の感受性に関する文献考察 アグリバイオ2021年1月号2021

    • Author(s)
      水野信哉, 大﨑恵理子
    • Total Pages
      4
    • Publisher
      北隆館 ニュー・サイエンス社
    • Related Report
      2020 Research-status Report
  • [Book] Liver Diseases-A Multidisciplinary Textbook2020

    • Author(s)
      Mizuno S, Ohsaki E.
    • Total Pages
      10
    • Publisher
      Springer Nature Switzerland
    • Related Report
      2020 Research-status Report
  • [Book] 低温医学と冬眠科学をつなぐ増殖因子の役割 アグリバイオ2020年1月号2020

    • Author(s)
      水野信哉, 大﨑恵理子
    • Total Pages
      4
    • Publisher
      北隆館 ニュー・サイエンス社
    • Related Report
      2020 Research-status Report
  • [Book] Molecular Basis of Fibrogenesis and Angiogenesis During Chronic Liver Disease: Impact of TGF-β and VEGF on Pathogenic Pathways: Liver Diseases-A Multidisciplinary Textbook2020

    • Author(s)
      S. Mizuno, E. Ohsaki
    • Total Pages
      10
    • Publisher
      Springer
    • ISBN
      9783030244316
    • Related Report
      2019 Research-status Report
  • [Book] 低温医学と冬眠科学をつなぐ増殖因子の役割: アグリバイオ2020年1月号2020

    • Author(s)
      水野信哉, 大﨑恵理子
    • Total Pages
      4
    • Publisher
      北隆館 ニュー・サイエンス社
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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