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Plos One : Metformin Inhibits Angiotensin Ii-induced Differentiation of Cardiac Fibroblasts Into Myofibroblasts, Volume 8

By Sovari, Ali A.

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Book Id: WPLBN0003951998
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Metformin Inhibits Angiotensin Ii-induced Differentiation of Cardiac Fibroblasts Into Myofibroblasts, Volume 8  
Author: Sovari, Ali A.
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
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Publisher: Plos

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Sovari, A. A. (n.d.). Plos One : Metformin Inhibits Angiotensin Ii-induced Differentiation of Cardiac Fibroblasts Into Myofibroblasts, Volume 8. Retrieved from http://www.ebooklibrary.org/


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Description : Differentiation of cardiac fibroblasts into myofibroblasts is a critical event in the progression of cardiac fibrosis that leads to pathological cardiac remodeling. Metformin, an antidiabetic agent, exhibits a number of cardioprotective properties. However, much less is known regarding the effect of metformin on cardiac fibroblast differentiation. Thus, in the present study, we examined the effect of metformin on angiotensin (Ang) II-induced differentiation of cardiac fibroblasts into myofibroblasts and its underlying mechanism. Adult rat cardiac fibroblasts were stimulated with Ang II (100 nM) in the presence or absence of metformin (10–200 mM). Ang II stimulation induced the differentiation of cardiac fibroblasts into myofibroblasts, as indicated by increased expression of a-smooth muscle actin (a-SMA) and collagen types I and III, and this effect of Ang II was inhibited by pretreatment of cardiac fibroblasts with metformin. Metformin also decreased Ang IIinduced reactive oxygen species (ROS) generation in cardiac fibroblasts via inhibiting the activation of the PKC-NADPH oxidase pathway. Further experiments using PKC inhibitor calphostin C and NADPH oxidase inhibitor apocynin confirmed that inhibition of the PKC-NADPH oxidase pathway markedly attenuated Ang II-induced ROS generation and myofibroblast differentiation. These data indicate that metformin inhibits Ang II-induced myofibroblast differentiation by suppressing ROS generation via the inhibition of the PKC-NADPH oxidase pathway in adult rat cardiac fibroblasts. Our results provide new mechanistic insights regarding the cardioprotective effects of metformin and provide an efficient therapeutic strategy to attenuate cardiac fibrosis.

 

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