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Mechanism of differentiation of intraepithelial lymphocytes with anti-inflammatory properties.

Research Project

Project/Area Number 21K07084
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

KEIKO Ono  慶應義塾大学, 医学部(信濃町), 助教 (50645611)

Co-Investigator(Kenkyū-buntansha) 筋野 智久  慶應義塾大学, 医学部(信濃町), 講師 (40464862)
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: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords腸管上皮間リンパ球 / 転写因子 / 炎症性腸疾患
Outline of Research at the Start

炎症性腸疾患(IBD)は腸管に慢性炎症をきたす疾患であり、本邦でも増加の一途を辿っている。腸管バリアの最前線として腸管上皮間リンパ球が存在し、近年、炎症抑制能を有するT細胞集団が存在することが明らかになっており、IBD患者では減少することが報告されている。そこで本研究において、炎症抑制性腸管上皮間リンパ球の分化誘導機構を解明し、IBDに対する新たなアプローチの治療開発を目指す。

Outline of Final Research Achievements

Intestinal intraepithelial lymphocytes (IELs) reside in the gut epithelial layer, where they help in maintaining intestinal homeostasis. CD4+CD8αα+ IELs, a subset of IELs that express CD4 and CD8α, exhibit regulatory properties against intestinal inflammation. Their reduced abundance in inflammatory bowel diseases, such as ulcerative colitis and Crohn's disease, has been reported.
We investigated the differentiation mechanisms of anti-inflammatory IELs to elucidate the pathology of inflammatory bowel diseases and to consider the development of new treatments.
In this study, we focused on the fact that anti-inflammatory IELs exist only between the intestinal epithelium, and analyzed the differentiation mechanism from the perspective of IEL dynamics, focusing on CCR9.

Academic Significance and Societal Importance of the Research Achievements

炎症性腸疾患は遺伝的要因、環境因子、免疫学的要因、腸内細菌が関与する多因子疾患であることがわかっているが、根本的な治療法がなく、発症原因の解明と新規治療法開発が急務である。現在存在する治療薬はCD4T細胞活性を抑制する免疫調節薬が主体であり、IELに着目した治療法は存在しない。炎症抑制性IELの分化機構を明らかにすることで、これまでの既存の治療法とは異なるアプローチの創薬開発に繋がる可能性がある。

Report

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

    (3 results)

All 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Journal Article] Downregulation of chemokine receptor 9 facilitates CD4+CD8αα+ intraepithelial lymphocyte development2023

    • Author(s)
      Ono Keiko、Sujino Tomohisa、Miyamoto Kentaro、Harada Yosuke、Kojo Satoshi、Yoshimatsu Yusuke、Tanemoto Shun、Koda Yuzo、Zheng Jiawen、Sayama Kazutoshi、Koide Tsuyoshi、...、Mucida Daniel、Taniuchi Ichiro、Kanai Takanori
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41467-023-40950-2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single-cell transcriptomics of human gut T cells identifies cytotoxic CD4+CD8A+ T cells related to mouse CD4 cytotoxic T cells2022

    • Author(s)
      Tanemoto Shun,Sujino Tomohisa,Miyamoto Kentaro,Moody Jonathan,Yoshimatsu Yusuke,Ando Yoshinari,Koya Ikuko,Harada Yosuke,Tojo Anna Okuzawa,Ono Keiko,Hayashi Yukie,Takabayashi Kaoru,Okabayashi Koji,Teratani Toshiaki,Mikami Yohei,Nakamoto Nobuhiro,Hosoe Naoki,Ogata Haruhiko,Hon Chung-Chau,Shin Jay W,Kanai Takanori
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: 977117-977117

    • DOI

      10.3389/fimmu.2022.977117

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intracellular metabolic adaptation of intraepithelial CD4+CD8αα+ T lymphocytes2022

    • Author(s)
      Harada Y, Sujino T, Miyamoto K, Nomura E, Yoshimatsu Y, Tanemoto S, Umeda S, Ono K, Mikami Y, Nakamoto N, Takabayashi K, Hosoe N, Ogata H, Ikenoue T, Hirao A, Kubota Y, Kanai T.
    • Journal Title

      iScience

      Volume: 25 Issue: 4 Pages: 104021-104021

    • DOI

      10.1016/j.isci.2022.104021

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

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

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