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2023 Fiscal Year Final Research Report

Studies on the mechanisms that ensure the biliary epithelial tissue integrity during the dynamic tissue remodeling process

Research Project

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Project/Area Number 21H02518
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44040:Morphology and anatomical structure-related
Research InstitutionThe University of Tokyo

Principal Investigator

Itoh Tohru  東京大学, 定量生命科学研究所, 協力研究員 (50396917)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywords上皮管腔組織 / 胆管 / 組織リモデリング / 肝再生 / オルガノイド
Outline of Final Research Achievements

Under various types of liver injury conditions, the intrahepatic biliary epithelial tissue forming the bile duct undergoes dynamic and adaptive structural transformation, also known as the biliary remodeling or the ductular reaction, which plays key roles in the organ regeneration and pathophysiology. In this research project, we aimed to clarify the regulatory mechanisms of the biliary remodeling in liver regeneration, with a particular focus on the biliary-enriched transcription factor Klf5. We have identified a novel cellular mechanism governed by the Klf5-Laminin axis whereby the biliary epithelial tissue maintains its integrity while undergoing unstable structural transformation during the biliary remodeling.

Free Research Field

分子細胞生物学

Academic Significance and Societal Importance of the Research Achievements

これまでの胆管リモデリングに関する研究は、もっぱら胆管周囲の組織・細胞からのシグナルによる細胞の「増殖」の制御機構に注目して進められてきました。本研究では、胆管組織に自律的なシグナル機構が「組織構造の維持」という新たな細胞機能を介して胆管リモデリングに重要な役割を担うことを初めて明らかにしました。胆管をはじめとする生体内の種々の管腔上皮組織の構造が適切に維持されるメカニズムについてはこれまでほとんど明らかにされておらず、こうした課題にアプローチするための新規かつユニークな解析プラットフォームを提供するものです。

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Published: 2025-01-30  

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