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Exploration of TLR3 ligands and the regulatory mechanism of response through nucleases in HSV infection.

Research Project

Project/Area Number 21K15464
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49070:Immunology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Sato Ryota  東京大学, 医科学研究所, 助教 (90779703)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsRNase / TLR / HSV / マクロファージ / 肝臓 / ウイルス
Outline of Research at the Start

2本鎖RNAセンサーであるTLR3は単純ヘルペスウイルス(HSV)感染防御に重要である。しかし、TLR3がDNAウイルスであるHSVをどの様にして認識しているのか不明である。リガンドを同定できれば、HSV感染防御機構を解明する上で非常に有用である。
自然免疫センサーの応答は、リガンドの代謝によってもコントロールされる。核酸の分解・代謝は核酸応答を抑制する役割と、核酸応答に必要なプロセシングの役割の両面があるが、RNaseがTLR3の免疫応答を制御するか報告がない。RNaseが免疫応答を正負に制御することを証明し、リガンドである核酸の分解、代謝を理解することで免疫応答の制御機構を解明する。

Outline of Final Research Achievements

This study focused on two main aspects: "Exploration of TLR3 ligands in HSV infection" and "Elucidation of the regulatory mechanism of TLR3 ligands through RNases." It was demonstrated that the amount of dsRNA, a TLR3 ligand, increased after HSV infection. Additionally, in RNaseT2-deficient cells localized in the lysosomes, TLR3 response was enhanced while TLR7 response was reduced. These findings suggest that RNaseT2 controls TLR3 and TLR7 responses by degrading ssRNA and dsRNA that reach the endolysosomes.

Academic Significance and Societal Importance of the Research Achievements

自然免疫は脂質や核酸のようなリガンドをセンサーが認識してサイトカインを産生し、抗菌・抗ウイルス反応を行うと行った単純なものだと思われていた。しかし、これらの応答は様々な分子によって緻密に制御されていることがわかってきた。先行研究では、各センサーの下流のシグナル伝達分子の解明、応答を制御する分子、各センサーの局在についての研究などリガンドを認識した後の分子機構の解明が主流であった。本研究によりRNaseが免疫応答を制御することを証明できたので、リガンドである核酸の分解、代謝を理解することで免疫応答の制御機構を解明するという新たなコンセプトが打ち立てられた。

Report

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

    (8 results)

All 2023 2022 2021

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (2 results)

  • [Journal Article] STING signalling is terminated through ESCRT-dependent microautophagy of vesicles originating from recycling endosomes.2023

    • Author(s)
      Kuchitsu Y, Mukai K, Uematsu R, Takaada Y, Shinojima A, Shindo R, Shoji T, Hamano S, Ogawa E, Sato R, Miyake K, Kato A, Kawaguchi Y, Nishitani-Isa M, Izawa K, Nishikomori R, Yasumi T, Suzuki T, Dohmae N, Uemura T, Barber GN, Arai H, Waguri S, Taguchi T.
    • Journal Title

      Nature Cell Biology

      Volume: 25 Issue: 3 Pages: 453-466

    • DOI

      10.1038/s41556-023-01098-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nucleic Acid Sensing by Toll-Like Receptors in the Endosomal Compartment2022

    • Author(s)
      Miyake Kensuke、Shibata Takuma、Fukui Ryutaro、Sato Ryota、Saitoh Shin-Ichiroh、Murakami Yusuke
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: 941931-941937

    • DOI

      10.3389/fimmu.2022.941931

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of the orphan transporter SLC35E1 in the nuclear egress of herpes simplex virus 12022

    • Author(s)
      Fumio Maeda, Akihisa Kato, Kosuke Takeshima, Misato Shibazaki, Ryota Sato, Takuma Shibata, Kensuke Miyake, Hiroko Kozuka-Hata, Masaaki Oyama, Eigo Shimizu, Seiya Imoto, Satoru Miyano, Shungo Adachi, Tohru Natsume, Koh Takeuchi, Yuhei Maruzuru, Naoto Koyanagi, Jun Arii, Yasushi Kawaguchi
    • Journal Title

      Journal of Virology

      Volume: - Issue: 10 Pages: 10-10

    • DOI

      10.1128/jvi.00306-22

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anti-TLR7 Antibody Protects Against Lupus Nephritis in NZBWF1 Mice by Targeting B Cells and Patrolling Monocytes2021

    • Author(s)
      Murakami Yusuke、Fukui Ryutaro、Tanaka Reika、Motoi Yuji、Kanno Atsuo、Sato Ryota、Yamaguchi Kiyoshi、Amano Hirofumi、Furukawa Yoichi、Suzuki Hitoshi、Suzuki Yusuke、Tamura Naoto、Yamashita Naomi、Miyake Kensuke
    • Journal Title

      Frontiers in Immunology

      Volume: 12 Pages: 0-0

    • DOI

      10.3389/fimmu.2021.777197

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dynamic control of nucleic-acid-sensing Toll-like receptors by the endosomal compartment.2021

    • Author(s)
      Miyake K, Saitoh S-I, Fukui R, Shibata T, Sato R, and Murakami Y.
    • Journal Title

      International Immunology

      Volume: 33 Issue: 12 Pages: 835-840

    • DOI

      10.1093/intimm/dxab037

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Skewed endosomal RNA responses from TLR7 to TLR3 in RNase T2-deficient macrophages2021

    • Author(s)
      Liu Kaiwen、Sato Ryota、Shibata Takuma、Hiranuma Ryosuke、Reuter Tatjana、Fukui Ryutaro、Zhang Yun、Ichinohe Takeshi、Ozawa Manabu、Yoshida Nobuaki、Latz Eicke、Miyake Kensuke
    • Journal Title

      International Immunology

      Volume: 33 Issue: 9 Pages: 479-490

    • DOI

      10.1093/intimm/dxab033

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The role of RNase T2 in macrophage homeostasis.2022

    • Author(s)
      Ryota Sato, Kaiwen Liu, Takuma Shibata, Ryutaro Fukui, Katsuaki Hoshino, Toshikazu Kondo, Yuko Ishida, Toru Miyazaki, Tsuneyasu Kaisho, Kensuke Miyake
    • Organizer
      日本免疫学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The role of RNase T2 in macrophage homeostasis.2021

    • Author(s)
      Ryota Sato, Kaiwen Liu, Takuma Shibata, Ryutaro Fukui, Katsuaki Hoshino, Tsuneyasu Kaisho, Kensuke Miyake
    • Organizer
      日本免疫学会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-01-30  

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