期刊
CELL AND TISSUE RESEARCH
卷 361, 期 3, 页码 779-787出版社
SPRINGER
DOI: 10.1007/s00441-015-2139-2
关键词
Myostatin; Heart; Fibrosis; p38; Mousemodels
类别
资金
- Max Planck Society
- German Center for Cardiovascular Research (DZHK)
- Leducq Foundation
- Excellence Initiative Cardiopulmonary System
Myostatin, a member of the TGF-beta superfamily of secreted growth factors, is a negative regulator of skeletal muscle growth. In the heart, it is expressed at lower levels compared to skeletal muscle but up-regulated under disease conditions. Cre recombinase-mediated inactivation of myostatin in adult cardiomyocytes leads to heart failure and increased mortality but cardiac function of surviving mice is restored after several weeks probably due to compensatory expression in non-cardiomyocytes. To study long-term effects of increased myostatin expression in the heart and to analyze the putative crosstalk between cardiomyocytes and fibroblasts, we overexpressed myostatin in cardiomyocytes. Increased expression of myostatin in heart muscle cells caused interstitial fibrosis via activation of the TAK-1-MKK3/6-p38 signaling pathway, compromising cardiac function in older mice. Our results uncover a novel role of myostatin in the heart and highlight the necessity for tight regulation of myostatin to maintain normal heart function.
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