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The role of microbial D-amino acids in the pathology of IgA nephropathy

Research Project

Project/Area Number 18K07181
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49070:Immunology-related
Research InstitutionKeio University

Principal Investigator

Suzuki Masataka  慶應義塾大学, 医学部(信濃町), 特任助教 (90595000)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsD-アミノ酸 / B細胞 / マクロファージ / IgA腎症 / 腸内細菌 / IgA / 腸管粘膜免疫
Outline of Final Research Achievements

D-amino acids are one of the characteristic metabolites in commensal bacteria. However, it have not been identified the role of D-amino acids in host immunity. In this study, we found that bacterial D-amino acids stimulate intestinal immune system and modulate B cell fate. Especially, Bacterial D-alanine activated macrophages to produce inflammatory cytokines such as TNF-alpha and IL-1beta that promoted B cell survival. Furthermore, we found that inactive mutation in DAO gene developed intestinal dysbiosis, increased IgA+ plasma cells in the small intestine, and accumulated IgA in the blood in mice. These mechanisms are involved in over production of IgA nephropathy mouse model named HIGA mouse.

Academic Significance and Societal Importance of the Research Achievements

本研究では初めてバクテリアの特徴的な代謝物であるD-アラニンが免疫刺激作用を持つことを報告した。D-アミノ酸の代謝異常は腸内細菌叢を変化させてIgAに関連する過剰免疫を誘導することから、IgA関連自己免疫疾患と関係している可能性が示された。なかでもIgA腎症モデル動物でD-アミノ酸代謝活性が失われていたことから、D-アミノ酸代謝酵素の補完または腸内細菌叢の調節によりIgA腎症の発症予防と進行抑制ができる可能性を示している。また、D-アミノ酸がB細胞の運命を調節していることから、IgA以外の免疫にも関わってる可能性があり、自己免疫疾患やアレルギー疾患との関わりも考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (14 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] Harvard Medical School(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Harvard University/Brigham and Women's Hospital/Division of Infectious Diseases(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Harvard University(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Host-microbe cross-talk governs amino acid chirality to regulate survival and differentiation of B cells2021

    • Author(s)
      Suzuki Masataka、Sujino Tomohisa、Chiba Sayako、Harada Yoichi、Goto Motohito、Takahashi Riichi、Mita Masashi、Hamase Kenji、Kanai Takanori、Ito Mamoru、Waldor Matthew Kaden、Yasui Masato、Sasabe Jumpei
    • Journal Title

      Science Advances

      Volume: 7 Issue: 10

    • DOI

      10.1126/sciadv.abd6480

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Serum d-serine accumulation after proximal renal tubular damage involves neutral amino acid transporter Asc-12019

    • Author(s)
      Suzuki Masataka、Gonda Yusuke、Yamada Marina、Vandebroek Arno A.、Mita Masashi、Hamase Kenji、Yasui Masato、Sasabe Jumpei
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1

    • DOI

      10.1038/s41598-019-53302-2

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] D-セリン -腎疾患バイオマーカーとしての可能性.2019

    • Author(s)
      鈴木将貴, 権田裕亮, 笹部潤平
    • Journal Title

      腎臓内科・泌尿器科

      Volume: 9 Pages: 327-333

    • Related Report
      2018 Research-status Report
  • [Journal Article] Emerging Role of D-Amino Acid Metabolism in the Innate Defense2018

    • Author(s)
      Sasabe Jumpei、Suzuki Masataka
    • Journal Title

      Frontiers in Microbiology

      Volume: 9 Pages: 933-933

    • DOI

      10.3389/fmicb.2018.00933

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distinctive Roles of D-Amino Acids in the Homochiral World: Chirality of Amino Acids Modulates Mammalian Physiology and Pathology2018

    • Author(s)
      Sasabe Jumpei、Suzuki Masataka
    • Journal Title

      The Keio Journal of Medicine

      Volume: 68 Issue: 1 Pages: 1-16

    • DOI

      10.2302/kjm.2018-0001-IR

    • NAID

      130007620380

    • ISSN
      0022-9717, 1880-1293
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Bacterial D-amino acids regulate mucosal IgA production2020

    • Author(s)
      鈴木将貴
    • Organizer
      第43回 日本分子生物学会 年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Loss of DAO activity triggers IgA nephropathy through disturbed mucosal immunity2019

    • Author(s)
      Suzuki M, Goto M, Takahashi R, Ito M, Aiso S, Sasabe J
    • Organizer
      IMMUNOLOGY 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] DAO regulates mucosal IgA production through modulation of gut microbiota and B cell proliferation2019

    • Author(s)
      Suzuki M, Sujino T, Goto M, Takahashi R, Ito M, Yasui M, Sasabe J.
    • Organizer
      国際D-アミノ酸学会(IDAR2019)(国際学会)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Loss of DAO activity triggers IgA nephropathy through disturbed mucosal immunity.2019

    • Author(s)
      M. Suzuki, M. Goto, R. Takahashi, M. Ito, S. Aiso, J. Sasabe.
    • Organizer
      IMMUNOLOGY 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] DAO controls IgA production through both T cell dependent and independent pathway.2018

    • Author(s)
      鈴木将貴
    • Organizer
      日本免疫学会学術集会
    • Related Report
      2018 Research-status Report
  • [Remarks] 腸内細菌のD-アミノ酸が粘膜免疫を制御する仕組みを解明

    • URL

      https://www.keio.ac.jp/ja/press-releases/2021/3/4/28-78424/

    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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