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Identification of gut microbiota involved in gut barrier dysfunction

Research Project

Project/Area Number 22K19420
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 49:Pathology, infection/immunology, and related fields
Research InstitutionUniversity of Tsukuba

Principal Investigator

Tahara Satoko  筑波大学, 生存ダイナミクス研究センター, 講師 (20360589)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywords腸管バリア / 腸内細菌 / 腸管粘膜バリア機能 / 腸内細菌叢 / 炎症性腸疾患
Outline of Research at the Start

腸内細菌叢と腸管バリア機能は相互に影響し合って恒常性を維持しているが、腸管バリア機能を維持する機序の全容は未解明である。腸管バリア機能の低下は、消化管疾患のみならず全身の疾患の発症に関わることから、腸管バリア機能低下に働く腸内細菌を明らかにし、この腸内細菌が腸管バリアの破綻に働く機序の一端を明らかにすることが出来れば、炎症性腸疾患、アレルギー、ガン、神経変性、老化などの病態の理解と治療法の開発に貢献することになり、科学的および社会的インパクトを有する創造性ある研究課題である。

Outline of Final Research Achievements

Disruption of the intestinal barrier integrity is a leading cause of various gastrointestinal diseases, such as inflammatory bowel disease. An inhibitory immunoglobulin-like receptor, Allergin-1, is expressed on mast cells and dendritic cells and inhibits TLR-2 and TLR-4 signaling in these cells. Allergin-1-deficient mice exhibited more severe dextran sulfate sodium (DSS)-induced colitis than did wild-type mice. Allergin-1-deficient mice showed an enhanced intestinal permeability compared with WT mice even before DSS administration. The 16S rRNA gene sequencing analysis demonstrated that Bifidobacterium pseudolongum was the dominant bacterium in Allergin-1-deficient mice. These results demonstrated that Allergin-1 deficiency enhanced intestinal dysbiosis with expanded B. pseudolongum, which contributes to intestinal barrier dysfunction.

Academic Significance and Societal Importance of the Research Achievements

腸管バリア機能の低下は、消化管疾患のみならず全身の疾患の発症に関わることから、腸管バリア機能低下に働く腸内細菌を明らかにし、この腸内細菌が腸管バリアの破綻に働く機序の一端を明らかにすることが出来れば、炎症性腸疾患、アレルギー、ガン、神経変性、老化などの病態の理解と治療法の開発に貢献することになり、科学的および社会的インパクトを有する創造性ある研究課題である.

Report

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

    (1 results)

All 2024

All Journal Article (1 results) (of which Peer Reviewed: 1 results)

  • [Journal Article] An inhibitory immunoreceptor Allergin-1 regulates the intestinal dysbiosis and barrier function in mice2024

    • Author(s)
      Yu-Hsien Lin, Satoko Tahara-Hanaoka, Nozomu Obana, Shinji Fukuda, Akira Shibuya
    • Journal Title

      International Immunology

      Volume: 36 Pages: 1-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed

URL: 

Published: 2022-07-05   Modified: 2025-01-30  

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