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2022 Fiscal Year Final Research Report

Elucidation of bile acids involved in the development of liver fibrosis in NASH using a new highly sensitive analysis method

Research Project

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Project/Area Number 19K11653
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59040:Nutrition science and health science-related
Research InstitutionKinjo Gakuin University

Principal Investigator

Asano Tomomi  金城学院大学, 生活環境学部, 講師 (90637951)

Co-Investigator(Kenkyū-buntansha) 那須 民江  中部大学, 生命健康科学部, 客員教授 (10020794)
石井 晃  名古屋大学, 医学系研究科, 教授 (30252175)
北森 一哉  金城学院大学, 生活環境学部, 教授 (80387597)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords胆汁酸 / ラット肝臓 / NASH / LC/MS/MS
Outline of Final Research Achievements

The SHRSP5/Dmcr rat and the parental strain rats, SHR and WKY, differ in the severity of high-fat and cholesterol (HFC) diet-induced liver fibrosis. In this study, we analyzed liver bile acids in these three strains of rats.
All strains of rats showed an increase in glycine-conjugated bike acids (G-BA) and a decrease in taurine-conjugated bile acids (T-BA) by administration of the HFC diet. In particular, T-BA values were the lowest in SHRSP5/Dmcr compared with SHR and WKY.
It ws suggested that the ability to conjugate bile acids and the synthesis and accumulation of G-BA by HFC diet are involved in liver fibrosis in NASH.

Free Research Field

健康科学

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、capillary LC/MS/MSによる高分離かつ高感度な分析方法を構築し、HFC食摂取による肝線維化の重症度が異なる3系統ラットの胆汁酸プロファイリング分析を行った。
3系統を比較することで、HFC食摂取による肝臓中胆汁酸組成の変化とWKY、SHR、SHRSP5/Dmcrの亜系統化の過程における肝臓中胆汁酸組成の変化が示され、これらの組成変化が肝線維化の進展と重症化に関与していることが明らかとなった。本研究によりNASHの予防や早期診断、重症化予防のための食事法や診断方法開発の一助となる知見が得られた。

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Published: 2024-01-30  

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