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Elucidation of protein translation shutoff by mosquito-borne flavivirus

Research Project

Project/Area Number 20H03495
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionJuntendo University (2023)
Osaka University (2020-2022)

Principal Investigator

TORU OKAMOTO  順天堂大学, 大学院医学研究科, 教授 (80628595)

Co-Investigator(Kenkyū-buntansha) 奥崎 大介  大阪大学, 免疫学フロンティア研究センター, 特任准教授(常勤) (00346131)
宮本 洋一  国立研究開発法人医薬基盤・健康・栄養研究所, 医薬基盤研究所 創薬デザイン研究センター, 主任研究員 (10379084)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywords日本脳炎ウイルス / デングウイルス / ATP / ワクチン / 解糖系 / フラビウイルス / 翻訳 / 蛋白質翻訳 / 細胞死 / エネルギー代謝 / 代謝フラックス / ウイルス学 / 細胞核
Outline of Research at the Start

デングウイルス等が属するフラビウイルス感染細胞では宿主細胞の蛋白質翻訳が低下することが知られているが、その分子機序は不明である。そこで、蛋白質の合成は、mRNAにリゾソームと呼ばれる巨大な蛋白質複合体が結合することで始まることが知られているため、ウイルス感染におけるリゾソームの形成への影響を検討する。また、CRISPR/Cas9を用いた順遺伝学的手法によりゲノムワイドに遺伝子を欠損させ、ウイルス感染による翻訳活性の低下に関与する宿主因子を同定する。得られた知見から、フラビウイルス感染における新しい宿主反応を明らかにできることが期待される。

Outline of Final Research Achievements

It has been elucidated that a decrease in ATP in infected cells leads to inhibition of protein synthesis in virus-infected cells. This suggests that viruses alter host cell metabolism to deprive ATP, thereby reducing the survival capacity of host cells and promoting virus replication.Furthermore, it is noteworthy that the viral metabolic pathway for ATP deprivation has been identified. It has been demonstrated that viruses can avoid ATP depletion by supplying ATP from other metabolic pathways, enabling prolonged virus production. This understanding sheds light on the mechanism by which viruses utilize host cell metabolic pathways to secure energy for their own replication.
These findings represent an important step towards elucidating the mechanism by which Flaviviruses acquire ATP within infected cells. Future research is expected to further elucidate how these mechanisms are involved in virus replication and pathogenicity.

Academic Significance and Societal Importance of the Research Achievements

ウイルス感染によるATP制御機構はこれまでに不明であった。本研究では、フラビウイルスが自身の増殖において特定の代謝経路で産生されるATPを利用していることを明らかにし、その代謝経路からATPが奪われることで、蛋白質翻訳活性の低下や細胞死が誘導されることを明らかにすることができた。さらに、同定した代謝経路とは別の代謝経路から産生されるATPが存在することで、ウイルス感染細胞はATPを維持することができることを見出した。このような研究は、ウイルスによるATPの利用方法を見出しただけでなく、効率の良いウイルス産生に繋がる研究成果でありワクチン生産の点からも意義がある研究であると考える。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (10 results)

All 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] SARS-CoV-2 ORF6 disrupts nucleocytoplasmic trafficking to advance viral replication2022

    • Author(s)
      Miyamoto Yoichi、Itoh Yumi、Suzuki Tatsuya、Tanaka Tomohisa、Sakai Yusuke、Koido Masaru、Hata Chiaki、Wang Cai-Xia、Otani Mayumi、Moriishi Kohji、Tachibana Taro、Kamatani Yoichiro、Yoneda Yoshihiro、Okamoto Toru、Oka Masahiro
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 483-483

    • DOI

      10.1038/s42003-022-03427-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Establishment of monoclonal antibodies broadly neutralize infection of hepatitis B virus.2022

    • Author(s)
      Zhang H, Itoh Y, Suzuki T, Ihara KI, Tanaka T, Haga S, Enatsu H, Yumiya M, Kimura M, Takada A, Itoh D, Shibazaki Y, Nakao S, Yoshio S, Miyakawa K, Miyamoto Y, Sasaki H, Kajita T, Sugiyama M, Mizokami M, Tachibana T, Ryo A, Moriishi K, Miyoshi E, Kanto T, Okamoto T, Matsuura Y.
    • Journal Title

      Microbiol Immunol.

      Volume: 66(4) Issue: 4 Pages: 179-192

    • DOI

      10.1111/1348-0421.12964

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hepatitis C virus modulates signal peptide peptidase to alter host protein processing.2021

    • Author(s)
      11.Hirano J, Yoshio S, Sakai Y, Songling L, Suzuki T, Itoh Y, Zhang H, Chen DV, Haga S, Oomori H, Kodama T, Maeda Y, Ono Y, Takahashi Y, Standley DM, Yamamoto M, Moriishi K, Moriya K, Kanto T, Takehara T, Koike K, Matsuura Y, Okamoto T.
    • Journal Title

      Proc Natl Acad Sci U S A.

      Volume: 118(22) Issue: 22 Pages: 2026184118-2026184118

    • DOI

      10.1073/pnas.2026184118

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ubiquitin specific peptidase 32 acts as an oncogene in epithelial ovarian cancer by deubiquitylating farnesyl-diphosphate farnesyltransferase 12021

    • Author(s)
      Nakae Aya、Kodama Michiko、Okamoto Toru、Tokunaga Makoto、Shimura Hiroko、Hashimoto Kae、Sawada Kenjiro、Kodama Takahiro、Copeland Neal G.、Jenkins Nancy A.、Kimura Tadashi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 552 Pages: 120-127

    • DOI

      10.1016/j.bbrc.2021.03.049

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deneddylation by SENP8 restricts hepatitis B virus propagation2021

    • Author(s)
      Chen David Virya、Suzuki Tatsuya、Itoh Yumi、Maeda Yusuke、Hirano Junki、Haga Saori、Zhang He、Ito Daiki、Matsuura Yoshiharu、Okamoto Toru
    • Journal Title

      Microbiology and Immunology

      Volume: 65 Issue: 3 Pages: 125-135

    • DOI

      10.1111/1348-0421.12874

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ponesimod suppresses hepatitis B virus infection by inhibiting endosome maturation2021

    • Author(s)
      Fauzyah Yuzy、Ono Chikako、Torii Shiho、Anzai Itsuki、Suzuki Rigel、Izumi Takuma、Morioka Yuhei、Maeda Yusuke、Okamoto Toru、Fukuhara Takasuke、Matsuura Yoshiharu
    • Journal Title

      Antiviral Research

      Volume: 186 Pages: 104999-104999

    • DOI

      10.1016/j.antiviral.2020.104999

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dysregulated Expression of the Nuclear Exosome Targeting Complex Component Rbm7 in Nonhematopoietic Cells Licenses the Development of Fibrosis2020

    • Author(s)
      Fukushima Kiyoharu、Satoh Takashi、Sugihara Fuminori、Sato Yuki、Okamoto Toru、Mitsui Yuichi、Yoshio Sachiyo、Li Songling、Nojima Satoshi、Motooka Daisuke、Nakamura Shota、Kida Hiroshi、Standley Daron M.、Morii Eiichi、Kanto Tatsuya、Yanagita Motoko、Matsuura Yoshiharu、Nagasawa Takashi、Kumanogoh Atsushi、Akira Shizuo
    • Journal Title

      Immunity

      Volume: 52 Issue: 3 Pages: 542-556

    • DOI

      10.1016/j.immuni.2020.02.007

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] MARCH5 requires MTCH2 to coordinate proteasomal turnover of the MCL1:NOXA complex2020

    • Author(s)
      Djajawi Tirta Mario、Liu Lei、Gong Jia-nan、Huang Allan Shuai、Luo Ming-jie、Xu Zhen、Okamoto Toru、Call Melissa J.、Huang David C. S.、van Delft Mark F.
    • Journal Title

      Cell Death & Differentiation

      Volume: 27 Issue: 8 Pages: 2484-2499

    • DOI

      10.1038/s41418-020-0517-0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ウイルスによる宿主への感染戦略2022

    • Author(s)
      岡本徹
    • Organizer
      第18回霊長類医科学フォーラム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ウイルス感染における細胞死の制御2020

    • Author(s)
      岡本徹
    • Organizer
      第 93 回日本生化学会大会
    • Related Report
      2020 Annual Research Report
    • Invited

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

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