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2021 Fiscal Year Final Research Report

Investigation of temporospatial dynamics of Sox4 in the pathogenesis of RA

Research Project

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Project/Area Number 19H03780
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionKyoto University

Principal Investigator

Yoshitomi Hiroyuki  京都大学, 医学研究科, 准教授 (50402920)

Co-Investigator(Kenkyū-buntansha) 戸口田 淳也  京都大学, ウイルス・再生医科学研究所, 教授 (40273502)
伊藤 宣  京都大学, 医学研究科, 特定教授 (70397537)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsヒト免疫学 / Sox4 / PD-1 / 関節リウマチ / 転写因子
Outline of Final Research Achievements

We analyzed the regulation between transcription factors Sox4 and Maf expressed in human Tph cells and the function of histone modification enzyme EZH2. Sox4, responsible for CXCL13 production, downregulated the expression of Maf, responsible for B cell-help functions. In multiple immunostaining of rheumatoid arthritis synovial tissues, Maf-positive T cells and Sox4-positive T cells showed different distributions. Inhibition of the histone modifying enzyme EZH2 enhanced CXCL13 production by Tph cells. CD3/28 stimulation of CD4-positive T cells in the presence of TGFβ and IL-1β enhanced EZH2 expression. EZH2 inhibitors did not affect Sox4 expression but attenuated H3K27me3 peak of CXCL13 region.

Free Research Field

ヒト免疫学

Academic Significance and Societal Importance of the Research Achievements

Tph細胞はヒトRA研究から同定されたCD4陽性T細胞分画で、CXCL13を大量に産生するなどマウスT細胞には認められない性質を有している。さらにTph細胞は関節リウマチのみならず様々な自己免疫疾患や感染症、悪性疾患などとも関与することが明らかになっている。ヒト免疫細胞を対象とした本研究でTph細胞の免疫分子機構が明らかになることで、将来的に様々なヒト疾患における免疫機構の理解や新しい治療の開発が期待される。

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Published: 2023-01-30  

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