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2022 Fiscal Year Final Research Report

New therapy targets for IgG4-RD and other human autoimmune disease focused on clonal expanded T and B cells.

Research Project

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Project/Area Number 18KK0260
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 57:Oral science and related fields
Research InstitutionKyushu University

Principal Investigator

MAEHARA TAKASHI  九州大学, 歯学研究院, 助教 (10637333)

Co-Investigator(Kenkyū-buntansha) 中村 誠司  九州大学, 歯学研究院, 教授 (60189040)
新納 宏昭  九州大学, 医学研究院, 教授 (20380636)
山元 英崇  九州大学, 大学病院, 准教授 (30404073)
森山 雅文  九州大学, 大学病院, 助教 (20452774)
Project Period (FY) 2018-10-09 – 2023-03-31
KeywordsIgG4関連疾患 / Tfh / IL10 / クラススイッチ / IgG4
Outline of Final Research Achievements

IgG4-related disease (IgG4-RD) is a disease characterized by systemic organ involvement, T- and B-cell infiltration of affected organs, and specific immunoglobulin class switching (mainly IgG4). In this study, we identified IL10+IL21+LAG3+Tfh cells involved in the specific class switching of IgG4-RD by single-cell gene expression analysis of T cells infiltrating affected organs with IgG4-RD. We also found that many of the class-switched B cells expressing AID also express high levels of IL10 and IL21 receptors.

Free Research Field

臨床免疫学

Academic Significance and Societal Importance of the Research Achievements

IgG4-RDの罹患臓器では多数の異所性胚中心形成を認めることから、所属リンパ節と共に罹患臓器の第3次リンパ節でもIgG4への特異なクラススイッチが生じていることが考えられた。本疾患のIgG4産生へのクラススイッチに特異に関わる新規のTfh細胞のサブセットを明らかにしたことで、未だ明らかにされていない免疫グロブリンのクラススイッチの分子機序解明につながり、新しい分子標的薬の開発につながる研究である。

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Published: 2024-01-30  

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