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The role of TRIM21 in B cell Abnormalities with Systemic Lupus Erythematosus

Research Project

Project/Area Number 19K23847
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0803:Pathology, infection/immunology, and related fields
Research InstitutionYokohama City University

Principal Investigator

KUNISHITA Yosuke  横浜市立大学, 医学研究科, 客員研究員 (30849972)

Project Period (FY) 2019-08-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsTRIM21 / 全身性エリテマトーデス / 抗TRIM21抗体 / B細胞 / 抗体産生 / Ⅰ型インターフェロン / SLE / 免疫グロブリン / IRF5 / B cell
Outline of Research at the Start

申請者らはマウスを用いた先行研究により、全身性エリテマトーデス(SLE)などの自己免疫疾患患者の血清中に認められる自己抗体の一つである抗SS-A抗体の対応抗原)(TRIM21)が、様々な免疫現象を調節する役割を担っているIRF5というタンパク質の発現調節を介して、SLE病態において、B細胞の過剰な活性化を抑制していることを明らかにした。
本研究では、TRIM21やIRF5の発現と抗TRIM21抗体との関連、抗TRIM21抗体をもつSLE患者の臨床的特徴を明らかにすることで、SLEの新規治療標的としてのTRIM21およびIRF5の可能性とB細胞機能異常のバイオマーカーとしての抗TRIM21抗体の有用性を検討する。

Outline of Final Research Achievements

TRIM21 is a member of the tripartite motif family proteins and is one of the autoantigens which react with anti-SS-A antibody (Ab) present in sera of patients with systemic lupus erythematosus (SLE) and Sjogren's syndrome. Previous studies have shown that TRIM21 dysfunction promotes aberrant B-cell differentiation and Ab production in SLE, and anti-TRIM21 Ab may be related to the TRIM21 dysfunction in human SLE pathogenesis. In this study, we examined the relationship between anti-TRIM21 Ab and clinical and immunological characteristics in SLE patients. The serum levels of interferon (IFN)-β were significantly higher in patients with anti-TRIM21 Ab as compared with those without. The levels of IgG1 and IgA were significantly higher in SLE patients with anti-TRIM21 Ab as compared with those without. The PBMCs of patients with anti-TRIM21 Ab showed a significantly higher expression of TRIM21 protein as compared with those without.

Academic Significance and Societal Importance of the Research Achievements

炎症性サイトカインや免疫グロブリンの血清レベル、TRIM21の発現は、治療介入によって変化する可能性があり、先行研究の知見を正確に検証するために、本研究は、SLEの治療前の血清と細胞を用いて行っており、非常に有意義なものとなった。本研究によって、抗TRIM21抗体はSLEにおけるI型インターフェロンの過剰産生とB細胞の過剰活性化に関連しており、その原因として、TRIM21の機能障害が存在する可能性が示唆された。抗TRIM21抗体は、SLEの病態において、Ⅰ型インターフェロンの過剰産生やB細胞の活性化により依存しているSLE患者の治療標的や新規バイオマーカーとなる可能性が示唆された。

Report

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

    (5 results)

All 2021 2020 2019

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

  • [Journal Article] TRIM21 Dysfunction Enhances Aberrant B-Cell Differentiation in Autoimmune Pathogenesis2020

    • Author(s)
      Kunishita Yosuke、Yoshimi Ryusuke、Kamiyama Reikou、Kishimoto Daiga、Yoshida Koji、Hashimoto Eijin、Komiya Takaaki、Sakurai Natsuki、Sugiyama Yumiko、Kirino Yohei、Ozato Keiko、Nakajima Hideaki
    • Journal Title

      Frontiers in Immunology

      Volume: 11 Pages: 98-98

    • DOI

      10.3389/fimmu.2020.00098

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Anti-TRIM21 antibody is associated with type I interferon and B-cell abnormalities in systemic lupus erythematosus2021

    • Author(s)
      國下洋輔、吉見竜介、鈴木直樹、飯塚友紀、三橋正季、小宮孝章、櫻井菜月、杉山裕美子、岸本大河、神山玲光、桐野洋平、長岡章平、中島秀明
    • Organizer
      第65回 日本リウマチ学会総会・学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Anti-TRIM21 antibody seropositivity is related to B-cell abnormalities in systemic lupus erythematosus2021

    • Author(s)
      Yosuke Kunishita, Ryusuke Yoshimi, Takaaki Komiya, Natsuki Sakurai, Yumiko Sugiyama, Kaoru Takase-Minegishi, Yohei Kirino, Shouhei Nagaoka, Hideaki Nakajima
    • Organizer
      IMMUNOLOGY 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 全身性エリテマトーデスにおいて抗TRIM21抗体はTRIM21機能不全及びB細胞機能異常と関連する2020

    • Author(s)
      國下洋輔、吉見竜介、鈴木直樹、飯塚友紀、三橋正季、小宮孝章、櫻井菜月、杉山裕美子、桐野洋平、長岡章平、中島秀明
    • Organizer
      第48回 日本臨床免疫学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Dysfunction of Trim21 promotes aberrant plasmablasts differentiation in B cells of systemic lupus erythematosus due to the reduction of TRIM21-mediated ubiquitylation of IRF5 protein.2019

    • Author(s)
      Yosuke Kunishita, Ryusuke Yoshimi, Reikou Kamiyama, Daiga Kishimoto, Koji Yoshida, Eijin Hashimoto, Yumiko Sugiyama, Takaaki Komiya, Yohei Kirino, Hideaki Nakajima
    • Organizer
      the American College of Rheumatology’s 2019 annual meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-09-03   Modified: 2022-01-27  

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