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HIV protein trafficking and transmission through cytokine secretion pathways

Research Project

Project/Area Number 20K07518
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Morikawa Yuko  北里大学, 感染制御科学府, 研究員 (20191017)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsHIV / Gag / 細胞内輸送 / SNARE / Syntaxin / サイトカイン / TNF / 分泌経路 / 輸送機構 / 輸送経路 / 細胞間伝播
Outline of Research at the Start

HIV Gagタンパク質の細胞内輸送の責任宿主分子を探索したところ、炎症性サイトカイン(TNFとIL6)分泌輸送の制御因子であるQc-SNAREが特定された。本研究では、免疫染色や生細胞分子イメージング等により、Gagタンパク質が炎症性サイトカインの分泌輸送経路により共輸送され相互促進されるのか、免疫細胞で明らかにする。次に、放出されたサイトカインの役割、すなわち標的細胞の誘引とHIV伝播を解析する。特に感染シナプス(感染細胞と標的細胞の細胞接着によるHIV伝播形式)では、Gagタンパク質と炎症性サイトカインの接着面への極性輸送を解明する。

Outline of Final Research Achievements

HIV Gag protein, the main structural protein of HIV particles, was transported by the SNARE molecule Syntaxin6 (STX6) in the cytoplasm. STX6 depletion impaired Gag trafficking and particle production. The cytokine TNFa was also transported by STX6, a phenomenon which was facilitated upon HIV infection. The Gag-TNFa interaction via STX6 suggested a possibility that Gag utilizes STX6 for its trafficking and cotraffics TNFa.

Academic Significance and Societal Importance of the Research Achievements

膜タンパク質の輸送を制御するSNARE分子の1つ Syntaxin6(STX6)は、サイトカインTNFaを細胞内輸送し細胞外へ分泌させた。ところが、HIV粒子の主構造タンパク質であるGagタンパク質は自身の細胞内輸送にSTX6を利用した。Gag-STX6-TNFaの相互作用や共輸送が観察されたことから、報告されていた現象「HIV感染ではTNFa分泌が亢進する」は、STX6を介したGagタンパク質輸送によってTNFaの分泌輸送が促進されると説明できた。

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

    (5 results)

All 2024 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results)

  • [Journal Article] Intracellular trafficking of HIV-1 Gag via Syntaxin 6-positive compartments/vesicles: Involvement in tumor necrosis factor secretion2024

    • Author(s)
      Naomi Tsurutani, Fumitaka Momose, Keiji Ogawa, Kouichi Sano, Yuko Morikawa
    • Journal Title

      Journal of Biological Chemistry

      Volume: 300 Issue: 3 Pages: 105687-105687

    • DOI

      10.1016/j.jbc.2024.105687

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Proteomic Analysis of Detergent-Resistant Membranes in HIV Virological Synapse: The Involvement of Vimentin in CD4 Polarization2023

    • Author(s)
      Iida Naoyuki、Kawahara Madoka、Hirota Riku、Shibagaki Yoshio、Hattori Seisuke、Morikawa Yuko
    • Journal Title

      Viruses

      Volume: 15 Issue: 6 Pages: 1266-1266

    • DOI

      10.3390/v15061266

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MAL inhibits the production of HIV-1 particles by sequestering Gag to intracellular endosomal compartments.2022

    • Author(s)
      Miyakawa K, Nishi M, Jeremiah SS, Morikawa Y, Ryo A
    • Journal Title

      Frontiers in virology

      Volume: 2 Pages: 836125-836125

    • DOI

      10.3389/fviro.2022.836125

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Efficient Transendothelial Migration of Latently HIV-1-Infected Cells2021

    • Author(s)
      Tanabe Reou、Morikawa Yuko
    • Journal Title

      Viruses

      Volume: 13 Issue: 8 Pages: 1589-1589

    • DOI

      10.3390/v13081589

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] HIV Reactivation in Latently Infected Cells With Virological Synapse-Like Cell Contact2020

    • Author(s)
      Okutomi T, Minakawa S, Hirota R, Katagiri K and Morikawa Y.
    • Journal Title

      Viruese

      Volume: - Issue: 4 Pages: 417-417

    • DOI

      10.3390/v12040417

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

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

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