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2023 Fiscal Year Final Research Report

A Study on the pathogenesis of eosinophilic esophagitis and esophageal achalasia focusing on pathogenic helper T Cells

Research Project

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Project/Area Number 22K15957
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionChiba University

Principal Investigator

Kaneko Tatsuya  千葉大学, 医学部附属病院, 医員 (90867003)

Project Period (FY) 2022-04-01 – 2024-03-31
Keywords病原性ヘルパーT細胞 / 好酸球性食道炎 / 食道アカラシア / Amphiregulin
Outline of Final Research Achievements

We established a mouse model that exhibits severe esophageal fibrosis associated with eosinophilic inflammation. Using flow cytometry and immunostaining, we revealed that pathogenic helper T cells increased in the esophagus of this model. We also discovered that these pathogenic helper T cells in the esophagus produced high levels of amphiregulin and that esophageal fibrosis was suppressed in amphiregulin-deficient mice. Furthermore, in esophageal biopsy samples from patients with eosinophilic esophagitis, an increase in amphiregulin-producing pathogenic helper T cells was observed, which correlated with the degree of esophageal fibrosis. These results demonstrate that pathogenic helper T cells play a crucial role in the esophageal fibrosis of eosinophilic esophagitis.

Free Research Field

消化器学

Academic Significance and Societal Importance of the Research Achievements

本研究の結果より、病原性ヘルパーT細胞が好酸球性食道炎に伴う食道線維化の予防・治療に関する標的となり得ることが示唆された。また、治療により臨床的/組織学的寛解に至った好酸球性食道炎の症例においても組織中には病原性ヘルパーT細胞が残存することを確認しており、病原性ヘルパーT細胞は炎症再燃や組織線維化を予測する新たなmarkerとなる可能性がある。さらに、本マウスモデルにおいて食道筋層間に存在する神経叢細胞が減少すること、好酸球は筋層を含めた食道全層に分布することを免疫染色により確認しており、今後の追加実験により食道アカラシア発症と好酸球性炎症の関連について新しい知見が得られることも期待される。

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Published: 2025-01-30  

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