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Elucidating the significance of amplified expression of endogenous retrotransposon in autoimmune/autoinflammatory diseases

Research Project

Project/Area Number 19H03451
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49030:Experimental pathology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Shibata Takuma  東京大学, 医科学研究所, 助教 (30554505)

Co-Investigator(Kenkyū-buntansha) 山口 貴世志  東京大学, 医科学研究所, 講師 (50466843)
竹本 経緯子  京都大学, ウイルス・再生医科学研究所, 助教 (90243104)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
KeywordsTLR7 / トランスポゾン / 自己炎症性疾患 / 自己免疫疾患 / 細胞増殖 / レトロトランスポゾン / Toll Like Receptor / 内在性レトロトランスポゾン
Outline of Research at the Start

TLR7 はウイルス由来一本鎖 RNA(ssRNA)を認識することで抗ウイルス応答を誘導するセンサーである。一方、TLR7の過剰活性化は自己免疫疾患や自己炎症性疾患の発症に関与することも知られるが、感染とは直接関連性のないこれら病態において TLR7/8 が過剰活性化する原因は全く不明である。 本研究では、TLR7を活性化するORNの原因となり得る内在性レトロトランスポゾンに着目し、レトロトランスポゾンの発現変化がTLR7の活性化および自己炎症性疾患や自己免疫疾患の病態に与える影響を検証する。

Outline of Final Research Achievements

Endolysosomal TLR7 recognises virus-derived single-stranded RNAs (ssRNAs) and induces antiviral responses. On the other hand, TLR7 hyperactivation plays a important role in the development of autoimmune and autoinflammatory diseases in vivo. However, the reason why TLR7 is activated in these pathologies, which are not associated with infection, is largely unknown. In this study, we found that TLR7 can be activated by elevated endogenous retrotransposon expression. Our findings strongly suggest that retrotransposon expression in vivo is important for the onset of autoinflammatory and autoimmune diseases.

Academic Significance and Societal Importance of the Research Achievements

動物モデルを用いた研究から、TLR7は自己免疫疾患や自己炎症性疾患の原因となることが示されており、ヒトにおいてもTLR7変異を有するSLE患者が最近報告されている。しかし、生体内においてTLR7の過剰応答が誘導される理由は未だ不明なままである。本研究では、レトロトランスポゾンの発現上昇によりTLR7が過剰活性化することが示された。この事実は、レトロトランスポゾンの発現制御がヒト疾患の制御につながる可能性を示しており、新たな治療法の確立が期待される。

Report

(3 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (7 results)

All 2020 2019 Other

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

  • [Journal Article] The impact of cell maturation and tissue microenvironments on the expression of endosomal Toll-like receptors in monocytes and macrophages2020

    • Author(s)
      Sato R, Reuter T, Hiranuma R, Shibata T, Fukui R, Motoi Y, Murakami Y, Tsukamoto H, Yamazaki S, Liu K, Saitoh SI, Latz E, Miyake K.
    • Journal Title

      Int Immunol

      Volume: 32 Issue: 12 Pages: 785-798

    • DOI

      10.1093/intimm/dxaa055

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural analysis reveals TLR7 dynamics underlying antagonism2020

    • Author(s)
      Tojo Shingo、Zhang Zhikuan、Matsui Hiroyuki、Tahara Masahiro、Ikeguchi Mitsunori、Kochi Mami、Kamada Mami、Shigematsu Hideki、Tsutsumi Akihisa、Adachi Naruhiko、Shibata Takuma、Yamamoto Masaki、Kikkawa Masahide、Senda Toshiya、Isobe Yoshiaki、Ohto Umeharu、Shimizu Toshiyuki
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41467-020-19025-z

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nucleosides drive histiocytosis in SLC29A3 disorders by activating TLR72019

    • Author(s)
      Shibata Takuma, Taoka Masato, Miyake Kensuke et al.
    • Journal Title

      BioRχiv

      Volume: December 16 Pages: 1-40

    • DOI

      10.1101/2019.12.16.877357

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Activated M2 macrophage contributes to the pathogenesis of IgG4-related disease via TLR7/IL-33 signalin.2019

    • Author(s)
      Ishiguro N, Moriyama M, Furusho K, Furukawa S, Shibata T, Murakami Y, Chinju A, Haque ASMR, Gion Y, Ohta M, Maehara T, Tanaka A, Yamauchi M, Sakamoto M, Mochizuki K, Ono Y, Hayashida JN, Sato Y, Kiyoshima T, Yamamoto H, Miyake K, Nakamura S
    • Journal Title

      Arthritis Rheumatol.

      Volume: Jan;72(1) Issue: 1 Pages: 166-178

    • DOI

      10.1002/art.41052

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endolysosomal compartments as platforms for orchestrating innate immune and metabolic sensors2019

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

      Journal of Leukocyte Biology

      Volume: 106 Issue: 4 Pages: 853-862

    • DOI

      10.1002/jlb.mr0119-020r

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] SLC29A3異常症における発症メカニズムの解明2019

    • Author(s)
      柴田 琢磨
    • Organizer
      第43回日本小児皮膚科学会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Remarks] 東京大学医科学研究所・感染遺伝学分野

    • URL

      https://www.ims.u-tokyo.ac.jp/kanseniden/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2025-01-30  

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