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Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2015 ; 112 (14): 4447-52 Nephropedia Template TP
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Myocardin is required for maintenance of vascular and visceral smooth muscle homeostasis during postnatal development #MMPMID25805819
Huang J; Wang T; Wright AC; Yang J; Zhou S; Li L; Yang J; Small A; Parmacek MS
Proc Natl Acad Sci U S A 2015[Apr]; 112 (14): 4447-52 PMID25805819show ga
Smooth muscle cells (SMCs) play critical roles in maintaining organismal homeostasis. Myocardin is a muscle-restricted transcriptional coactivator previously implicated in development of the heart and vasculature. To define myocardin-mediated functions during postnatal development, we generated mice harboring an inducible, SMC-restricted mutation in the Myocd gene. Myocardin mutant mice exhibit profound derangements in arterial structure and in the gastrointestinal and genitourinary tracts. Myocd deletion leads to the loss of the contractile SMC phenotype, triggering cell-autonomous ER stress, autophagy, and apoptosis. These data reveal that myocardin is required for maintenance, homeostasis, and ultimately survival of vascular and visceral SMCs during postnatal development. These findings provide unanticipated insights into the pathogenesis of thoracic aortic aneurysm and dissection and gastrointestinal and genitourinary syndromes.