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Molecular mechanism of HCV-induced formation of large lipid droplets and virus life cycle

Research Project

Project/Area Number 20K07514
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionKobe University

Principal Investigator

Shoji Ikuo  神戸大学, 医学研究科, 教授 (40356241)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsHCV / JNK / AIP4 / ADRP / SPG20 / 脂肪滴 / 肝脂肪化 / NS3/4Aプロテアーゼ / TIP47 / C型肝炎ウイルス / NS3/4A / 肥大化
Outline of Research at the Start

本研究では、C型肝炎ウイルス(HCV)感染による肝細胞での脂肪滴肥大化維持の分子機構の解明を目的とする。さらにHCV感染による肝細胞での脂肪滴の肥大化を抑制する方法を開発し、肝脂肪化の抑制法とHCV増殖の抑制法の開発のための分子基盤の構築を目指す。具体的には以下の3点について解析を行う。1) 脂肪滴肥大化維持に必要なウイルス因子および宿主因子の同定、2) 脂肪滴肥大化維持に必要な分子機構の解明、3) 脂肪滴肥大化抑制法の開発。

Outline of Final Research Achievements

We focused on these 3 topics.1. HCV infection induced JNK activation and AIP4 phosphorylation 2. ADRP ubiquitination by E3 ligase AIP4. ADRP ubiquitination by peridroplet proteins and AIP4. 3. analysis of the mechanism of ADRP ubiquitination by peridroplet proteins and AIP4. HCV JNK activation caused phosphorylation and activation of AIP4. immunofluorescence staining of HCV-infected cells revealed that ADRP was mainly localized around LDs. Taken together, these results suggest that NS3/4A protease specifically cleaves SPG20 and inhibits Itch-mediated ubiquitin-dependent degradation of LD-associated ADRP, thereby promoting the formation of large LDs.

Academic Significance and Societal Importance of the Research Achievements

HCV感染患者の肝に脂肪化が発症することは臨床上よく知られ、HCV感染による脂質代謝系の変化が詳細に解析されてきた。しかし、HCV感染初期に肝細胞で脂肪滴(Lipid droplet, LD)が肥大化し、肥大脂肪滴が維持される分子機構は不明であった。しかし、本研究により、HCV感染で早期に肝細胞に脂肪滴形成が誘導される分子機構が明らかとなった。HCV感染による肝脂肪化に対する治療法開発へとつながることが期待される。

Report

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

    (16 results)

All 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 2 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] Udayana University(インドネシア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ガジャマダ大学/ウダヤナ大学(インドネシア)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Hepatitis C Virus-Induced ROS/JNK Signaling Pathway Activates the E3 Ubiquitin Ligase Itch to Promote the Release of HCV Particles via Polyubiquitylation of VPS4A2022

    • Author(s)
      Deng Lin、Liang Yujiao、Ariffianto Adi、Matsui Chieko、Abe Takayuki、Muramatsu Masamichi、Wakita Takaji、Maki Masatoshi、Shibata Hideki、Shoji Ikuo
    • Journal Title

      Journal of Virology

      Volume: 96 Issue: 6 Pages: 1811-21

    • DOI

      10.1128/jvi.01811-21

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hepatitis C virus NS5A protein promotes the lysosomal degradation of diacylglycerol O-acyltransferase 1 (DGAT1) via endosomal microautophagy2022

    • Author(s)
      Putu Yuliandari, Chieko Matsui, Lin Deng, Takayuki Abe, Hiroyuki Mori, Shuhei Taguwa, Chikako Ono, Takasuke Fukuhara, Yoshiharu Matsuura, Ikuo Shoji
    • Journal Title

      Autophagy Reports

      Volume: 1 Issue: 1 Pages: 264-285

    • DOI

      10.1080/27694127.2022.2095591

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Role of Chaperone-Mediated Autophagy in Hepatitis C Virus-Induced Pathogenesis2021

    • Author(s)
      Matsui Chieko、Yuliandari Putu、Deng Lin、Abe Takayuki、Shoji Ikuo
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 11 Pages: 1-8

    • DOI

      10.3389/fcimb.2021.796664

    • NAID

      120007184287

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] NS5A-ISGylation via Lysine 26 Has a Critical Role for Efficient Propagation of Hepatitis C Virus Genotype 2a2021

    • Author(s)
      Rheza Gandi Bawono, Takayuki Abe, Yasuaki Shibata, Chieko Matsui, Lin Deng, Ikuo Shoji
    • Journal Title

      Kobe J Med Sci

      Volume: 67

    • NAID

      120007169870

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] ISGylation of hepatitis C virus NS5A protein promotes viral RNA replication via the recruitment of cyclophilin A2020

    • Author(s)
      Abe T, Minami N, Bawono RG, Matsui C, Deng L, Fukuhara T, Matsuura Y, Shoji I
    • Journal Title

      Journal of Virology

      Volume: 94 Issue: 20 Pages: 1-23

    • DOI

      10.1128/jvi.00532-20

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] C型肝炎ウイルスが誘導する新規選択的蛋白質分解経路.2022

    • Author(s)
      松井千絵子、Putu Yuliandari, Maria Alethea Septianastiti, 鄧琳, 阿部隆之, 勝二郁夫.
    • Organizer
      第69回日本ウイルス学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] HCV感染はANX5とPKC-etaによるoccludinの機能制御に干渉することでウイルス伝播を促進させる2022

    • Author(s)
      阿部隆之、松井千絵子、鄧琳、松浦善治、勝二郁夫
    • Organizer
      第69回日本ウイルス学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] HCV NS3/4A protease cleaves SPG20 for formation of large lipid droplets2021

    • Author(s)
      Matsui C, Yuliandari P, Deng L, Abe T, Shoji I.
    • Organizer
      27th International symposium on hepatitis C virus and related viruses
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Hepatitis C virus infection promotes the lysosomal degradation of Diacylglycerol O-acytransferase 1 (DGAT1).2021

    • Author(s)
      Yuliandari P, Matsui C, Deng L, Abe T, Shoji I.
    • Organizer
      27th International symposium on hepatitis C virus and related viruses
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] HCV NS3/4A protease cleaves SPG20 for formation of large lipid droplets2021

    • Author(s)
      Matsui C, Yuliandari P, Deng L, Abe T, Shoji I.
    • Organizer
      第68回日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Hepatitis C virus NS3/4A protease specifically cleaves SPG20 and promotes the formation of large lipid droplets2020

    • Author(s)
      Chieko Matsui, Putu Yuliandari, Lin Deng, Takayuki Abe and Ikuo Shoji
    • Organizer
      第43回日本分子生物学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Hepatitis C Virus infection Promotes the Lysosomal Degradation of Diacylglycerol O-acyltransferase 1 (DGAT1)2020

    • Author(s)
      Putu Yuliandari, Chieko Matsui, Lin Deng, Takayuki Abe, Ikuo Shoji
    • Organizer
      第43回日本分子生物学会
    • Related Report
      2020 Research-status Report
  • [Book] The Role of Autophagy in Infectious Diseases2022

    • Author(s)
      Chieko Matsui, Putu Yuliandari, Lin Deng, Takayuki Abe, and Ikuo Shoji,
    • Total Pages
      427
    • Publisher
      Frontiers Research Topics
    • ISBN
      9782832504260
    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学大学院医学研究科附属感染症センター感染制御学分野

    • URL

      https://www.med.kobe-u.ac.jp/infcon/

    • Related Report
      2020 Research-status Report

URL: 

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

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