Premium
Matrix stiffness controls cardiac fibroblast activation through regulating YAP via AT 1 R
Author(s) -
Niu Lele,
Jia Yuanbo,
Wu Mian,
Liu Han,
Feng Yanjing,
Hu Yan,
Zhang Xiaohui,
Gao Dengfeng,
Xu Feng,
Huang Guoyou
Publication year - 2020
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.29678
Subject(s) - mechanotransduction , extracellular matrix , microbiology and biotechnology , gene knockdown , myofibroblast , fibrosis , signal transduction , chemistry , matrix (chemical analysis) , cardiac fibrosis , fibroblast , biology , in vitro , medicine , apoptosis , biochemistry , chromatography
Cardiac fibrosis is a common pathway leading to heart failure and involves continued activation of cardiac fibroblasts (CFs) into myofibroblasts during myocardium damage, causing excessive deposition of the extracellular matrix (ECM) and thus increases matrix stiffness. Increasing evidence has shown that stiffened matrix plays an important role in promoting CF activation and cardiac fibrosis, and several signaling factors mediating CF mechanotransduction have been identified. However, the key molecules that perceive matrix stiffness to regulate CF activation remain to be further explored. Here, we detected significantly increased expression and nuclear localization of Yes‐associated protein (YAP) in native fibrotic cardiac tissues. By using mechanically regulated in vitro cell culture models, we found that a stiff matrix‐induced high expression and nuclear localization of YAP in CFs, accompanied by enhanced cell activation. We also demonstrated that YAP knockdown decreased fibrogenic response of CFs and that YAP overexpression promoted CF activation, indicating that YAP plays an important role in mediating matrix stiffness‐induced CF activation. Further mechanistic studies revealed that the YAP pathway is an important signaling branch downstream of angiotensin II type 1 receptor in CF mechanotransduction. The findings help elucidate the mechanism of fibrotic mechanotransduction and may contribute to the development of new approaches for treating fibrotic diseases.