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Research on the Tonsil Immune Diversity Involved in the development of IgA Nephropathy

Research Project

Project/Area Number 21K08250
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53040:Nephrology-related
Research InstitutionNiigata University

Principal Investigator

Goto Shin  新潟大学, 医歯学系, 准教授 (00463969)

Co-Investigator(Kenkyū-buntansha) 成田 一衛  新潟大学, 医歯学系, 教授 (20272817)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
KeywordsIgA腎症 / 扁桃 / 1細胞RNA-Seq / T細胞受容体レパトア / 1細胞解析 / 口蓋扁桃 / レパトア解析
Outline of Research at the Start

本研究は、IgA腎症発症における口蓋扁桃の免疫応答異常の詳細な機序を解明することを目 的とする。IgA腎症では扁桃での粘膜免疫応答が亢進するが、これに関与 する免疫細胞の動態や扁桃IgAの抗原特異性・腎炎惹起能の詳細は不明である。そこで本研究では、1細胞解析を通じて扁桃組織の網羅的遺伝子発現解析を行い、IgA腎症に特異的な免疫細胞集団を明らかにする。また単一細胞レベルのT・B細胞受容体レパトア解析を行い、抗原特異的レパトアを探索する。扁桃および末梢血IgAレパトアと腎糸球体のプロテオーム情報を比較し、扁桃由来IgA1による腎炎発症の原因を明らかにする。

Outline of Final Research Achievements

In this study, we planned to use excised tonsils to elucidate the details of the immune response in IgA nephropathy (IgAN). Both bulk RNA-Seq and single-cell nucleus RNA-Seq of tonsil tissue revealed an up-regulation of epithelial-related gene expression in IgAN patients compared to chronic tonsillitis patients. In terms of cell-cell interactions, interactions between epithelial gene groups and immune cells, including dendritic cells, were detected. Regarding the tonsil T-cell receptor (TCR) repertoire, IgAN patients showed significantly lower similarity in the TCR repertoire alpha chain compared to chronic tonsillitis patients, with differences in shared clones. Features of the CDR3 sequences of these shared clones and their association with tonsil APRIL and IgA-binding bacteria were observed.

Academic Significance and Societal Importance of the Research Achievements

本研究からIgA腎症患者の粘膜免疫異常について、特に扁桃組織において遺伝子発現プロフィールが明らかになった。国内ではIgA腎症に対する治療として扁桃摘出術およびステロイド治療が広く行われている。扁桃摘出の理論的根拠として、また扁桃解析をIgA腎症の粘膜免疫異常のモデル解析として研究を進めることは実際の臨床診療にフィードバックする点で意義があると思われる。今後、新たな治療ターゲットの解明につながることが期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2021

All Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] RNA-Seq analysis of tonsils in patients with IgA nephropathy.2023

    • Author(s)
      Kazunori Satokata, Shin Goto, Hirofumi Watanabe, Koichi Higashi, Ken Kurokawa, Ichiei Narita.
    • Organizer
      17th International Symposium on IgA nephropathy. 2023/09/25-27, Tokyo
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] IgA腎症患者の扁桃陰窩におけるトランスクリプトーム解析2023

    • Author(s)
      里方一紀、後藤眞、渡辺博文、山口浩毅、山本卓,金子佳賢、成田一衛
    • Organizer
      第46回IgA腎症研究会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Public repertoire of T cell receptor in tonsils of IgA nephropathy patients2022

    • Author(s)
      Satokata K, Goto S, Yamaguchi H, Watanabe H, Yonezawa M, Tsuchida M, Yamamoto S, Kaneko Y, Narita I
    • Organizer
      the 65th Annual Meeting of the Japanese Society of Nephrology
    • Related Report
      2022 Research-status Report
  • [Presentation] T cell receptor repertoire analysis in tonsillar tissues of patients with IgA nephropathy2022

    • Author(s)
      Kazunori Satokata, Shin Goto, Hiroki Yamaguchi, Hirofumi Watanabe, Suguru Yamamoto, Yoshikatsu Kaneko, Ichiei Narita
    • Organizer
      ASN Kidney Week 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] High-throughput sequencing analysis of theT-cell receptor repertoire in tonsils of IgA nephropathy2021

    • Author(s)
      Satokata K, Goto S, Yamaguchi H, Watanabe H, Yonezawa M, Tsuchida M, Yamamoto S, Kaneko Y, Narita I
    • Organizer
      The 64th Annual Meeting of the Japanese Society of Nephrology
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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