首页|Rspo3/Lgr5促进N-钙黏蛋白表达参与小鼠肝损伤

Rspo3/Lgr5促进N-钙黏蛋白表达参与小鼠肝损伤

Rspo3/Lgr5 promotes the expression of N-cadherin and participates in mouse liver injury

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目的 本文旨在研究在损伤肝组织中,特异性顶部盘状底板反应蛋白 3(R-spondin3,Rspo3)上调周细胞N-钙黏蛋白(N-cadherin,Ncad,基因名 Cdh2)表达,从而参与小鼠肝损伤.方法 采用反转录实时定量聚合酶链反应法(reverse transcription-quantitative polymerase chain reaction,RT-qPCR)测定 Rspo3,小鼠肝组织富含亮氨酸重复序列 G 蛋白偶联受体 5(leucine-rich repeat-containing G protein-coupled receptor 5,Lgr5)和Cdh2 mRNA表达情况;采用蛋白质免疫印迹方法 以及免疫荧光染色方法 测定Ncad定位以及表达情况;分离并培养小鼠原代骨髓间充质细胞(bone marrow mesenchymal stromal cell,BMSC),采用靶向Lgr5 的RNA干扰实验以确定Rspo3 是否通过作用于Lgr5 上调Ncad表达.结果 在损伤小鼠肝组织中,Rspo3 及其受体Lgr5 显著上调;肝损伤时黏附连接蛋白Ncad表达上调,且与Rspo3 及Lgr5 表达量呈正相关;Ncad主要定位于损伤肝脏的周细胞;使用Rspo3 处理小鼠原代BMSC能够上调Ncad表达,Lgr5 siRNA能使Ncad水平下降.结论 在小鼠损伤肝组织中,Rspo3通过作用于受体Lgr5,上调周细胞中Ncad表达,从而影响小鼠肝损伤.
Objective The aim of this study is to investigate R-spondin3(Rspo3)up-regulates the expression of Ncad(N-cadherin,gene named Cdh2)and participates in mouse liver injury.Methods The expression of Rspo3,leucine-rich repeat-containing G protein-coupled receptor 5(Lgr5)and Cdh2 were measured by reverse transcription-quantitative polymerase chain reaction(RT-qPCR).The expression of Ncad was measured by Western blotting and Immunofluorescence.Serum-starved primary cultured mouse bone marrow mesenchymal stromal cell(BMSC)were transfected with Lgr5 siRNA to verify whether Rspo3 up-regulates Ncad expression by acting on Lgr5.Results The Rspo3 and Lgr5 mRNA expression was up-regulated in the liver tissue of mouse injured liver model.The mRNA expression of Cdh2 was up-regulated and positively correlated with the expression of Rspo3 and Lgr5,which is one of the receptors of Rspo3.Immunofluorescence shows that Ncad is mainly localized in the pericytes of the mouse injured liver.The Rspo3-induced up-regulation of Ncad was inhibited after Lgr5 siRNA transfection.Conclusion In the mouse injured liver tissue,Rspo3 up-regulates the expression of Ncad in pericytes by acting on Lgr5,and affects mouse liver injury.

liver injuryN-cadherinR-spondin3leucine-rich repeat-containing G protein-coupled receptor 5

高岳、岳闻慧、丁靖茹、李丽英、杨乐

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首都医科大学细胞生物学系'肝脏保护与再生调节'北京市重点实验室,北京 100069

肝损伤 N-钙黏蛋白 特异性顶部盘状底板反应蛋白3 富含亮氨酸重复序列G蛋白偶联受体5

国家自然科学基金北京市自然科学基金北京市教委科技一般项目

820706237202007KM202010025029

2024

首都医科大学学报
首都医科大学

首都医科大学学报

CSTPCD北大核心
影响因子:1.511
ISSN:1006-7795
年,卷(期):2024.45(3)
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