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Elucidation of the pathogenic role of microbiota for the development of systemic autoimmune diseases.

Research Project

Project/Area Number 20K08773
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2021)
Kyoto University (2020)

Principal Investigator

Hashimoto Motomu  大阪公立大学, 大学院医学研究科, 教授 (60512845)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords全身性エリテマトーデス / 腸内細菌叢 / Th17細胞 / ZAP70 / TCRシグナル / Th17 / 濾胞性ヘルパーT細胞 / 自己抗体 / 腸内細菌 / 動物モデル
Outline of Research at the Start

本研究は、TCRシグナル伝達不全の結果、関節炎やSLEを自然発症する動物モデル(SKG)を用いて腸内細菌叢やそれにより誘導されるTh17細胞が病態に寄与するメカニズムを解明し、ヒト臨床研究にも応用する。具体的には、下記の3点を検討する。
(1)C57BL/6背景のSKGマウスのSLE発症におけるMicrobiota-driven Th17の関与
(2)BALB/c背景のSKGマウスの関節炎発症におけるBacterial translocationの関与
(3)ヒト臨床検体を用いたMicrobiota-Th17-自己抗体Fc糖鎖修飾と疾患活動性の関係

Outline of Final Research Achievements

In this study, we studied the role of gut microbiome for the development of systemic autoimmune diseases, utilizing an animal model of autoimmunity. SKG mice, which harbor a point mutation in ZAP70 gene, developed SLE or SpA upon B6 or BALB/c genetic background, respectively. The B6-SKG study revealed that 1) Gut microbiome was required for the development of SLE, 2) altered gut microbiome drive Th17 differentiation, 3) Th17 promote systemic autoimmunity via modification of Fc-glycosylation of autoantibodies. The BALB/c-SKG study revealed that 1) Induction of colitis could trigger arthritis in SKG mice, 2) Arthritis was triggered by the translocation of gut microbiome.

Academic Significance and Societal Importance of the Research Achievements

SLEやSpAなどの全身性自己免疫疾患の発症メカニズムはまだよくわかっていないが、近年の研究により腸内細菌叢のかかわりが指摘されている。本研究では、腸内細菌叢がSLEやSpAなどの全身性自己免疫疾患の発症につながる分子メカニズムの一端を明らかにした。これらの研究成果は、腸内細菌叢とその生体内移行、もしくはTh17細胞の分化誘導やそれによる自己抗体の糖鎖修飾の変化が、自己免疫疾患の治療ターゲットとなりえることを示した。

Report

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

    (6 results)

All 2022 2020 Other

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

  • [Int'l Joint Research] Ghent University(ベルギー)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Effect of Impaired T Cell Receptor Signaling on the Gut Microbiota in a Mouse Model of Systemic Autoimmunity2022

    • Author(s)
      Shirakashi Mirei、Maruya Mikako、Hirota Keiji、Tsuruyama Tatsuaki、Matsuo Takashi、Watanabe Ryu、Murata Koichi、Tanaka Masao、Ito Hiromu、Yoshifuji Hajime、Ohmura Koichiro、Elewaut Dirk、Sakaguchi Shimon、Fagarasan Sidonia、Mimori Tsuneyo、Hashimoto Motomu
    • Journal Title

      Arthritis & Rheumatology

      Volume: 74 Issue: 4 Pages: 641-653

    • DOI

      10.1002/art.42016

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Oral dextran sulfate sodium administration induces peripheral spondyloarthritis features in SKG mice accompanied by intestinal bacterial translocation and systemic Th1 and Th17 cell activation2022

    • Author(s)
      Tabuchi Yuya、Katsushima Masao、Nishida Yuri、Shirakashi Mirei、Tsuji Hideaki、Onizawa Hideo、Kitagori Koji、Akizuki Shuji、Nakashima Ran、Murakami Kosaku、Murata Koichi、Yoshifuji Hajime、Tanaka Masao、Morinobu Akio、Hashimoto Motomu
    • Journal Title

      Arthritis Research & Therapy

      Volume: 24 Issue: 1 Pages: 176-187

    • DOI

      10.1186/s13075-022-02844-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] T細胞受容体シグナル伝達異常が腸内細菌叢と全身性自己免疫へ与える影響2022

    • Author(s)
      白柏 魅怜、橋本 求
    • Journal Title

      リウマチ科

      Volume: 68 Pages: 336-340

    • Related Report
      2022 Annual Research Report
  • [Presentation] 脊椎関節炎の病態とIL-17阻害の意義2022

    • Author(s)
      橋本求
    • Organizer
      日本臨床免疫学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Book] ヒト常在菌叢と生理機能・全身疾患2020

    • Author(s)
      橋本 求、白柏 魅玲
    • Total Pages
      325
    • Publisher
      シーエムシー出版
    • Related Report
      2020 Research-status Report

URL: 

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

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