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2021 Fiscal Year Final Research Report

Research of new therapies targeting small intestinal mucosal homeostasis for non-alcoholic steatohepatitis (NASH).

Research Project

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Project/Area Number 20K16063
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionKobe Pharmaceutical University

Principal Investigator

Kawauchi Shoji  神戸薬科大学, 薬学部, 准教授 (30549308)

Project Period (FY) 2020-04-01 – 2022-03-31
Keywords非アルコール性脂肪肝炎(NASH) / アミオダロン塩酸塩 / 腸肝連関 / 小腸粘膜恒常性
Outline of Final Research Achievements

In amiodarone (AMD)-induced NASH model mice, we examined whether disruption of small intestinal mucosal homeostasis is involved in the pathogenesis of NASH. Villus shortening, disruption of tight junction proteins localization and increased intestinal permeability were observed in the small intestine of the AMD group mice. In the liver of AMD group mice, activation of macrophages expressing CD14, which is a co-receptor of LPS, and increased expression of TNF-α were observed. Those results suggest that AMD-induced NASH progression is likely associated with the disruption of intestinal barrier function. Thus, it is thought that intestinal homeostasis could slow or prevent NASH progression.

Free Research Field

医療薬学

Academic Significance and Societal Importance of the Research Achievements

NASH発症の背景因子には、生活習慣病と薬剤の2つがある。NASHの病態進展には、腸内細菌の過増殖による粘膜透過性亢進を介して、腸内細菌由来成分が肝臓に移行する機序が指摘されている。これは生活習慣を基盤としたNASHに関する報告であり、薬剤性のNASHに関する報告はほとんどない。本研究では、NASHを高頻度で発症することが報告されているAMDを用いてNASHモデルを作成した。その結果、薬剤性NASHの発症や進展の予防において、小腸粘膜の恒常性維持が重要である可能性が示唆された。本成果は、現在、有効な治療薬がないNASHにおいて新たな治療標的を生み出す端緒となる学術的意義を有している。

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Published: 2023-01-30  

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