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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2014 ; 307
(6
): F727-35
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Nitric oxide and carbon monoxide antagonize TGF-? through ligand-independent
internalization of T?R1/ALK5
#MMPMID25100282
Hovater MB
; Ying WZ
; Agarwal A
; Sanders PW
Am J Physiol Renal Physiol
2014[Sep]; 307
(6
): F727-35
PMID25100282
show ga
Transforming growth factor (TGF)-? plays a central role in vascular homeostasis
and in the pathology of vascular disease. There is a growing appreciation for the
role of nitric oxide (NO) and carbon monoxide (CO) as highly diffusible,
bioactive signaling molecules in the vasculature. We hypothesized that both NO
and CO increase endocytosis of TGF-? receptor type 1 (T?R1) in vascular smooth
muscle cells (VSMCs) through activation of dynamin-2, shielding cells from the
effects of circulating TGF-?. In this study, primary cultures of VSMCs from
Sprague-Dawley rats were treated with NO-releasing molecule 3 (a NO chemical
donor), CO-releasing molecule 2 (a CO chemical donor), or control. NO and CO
stimulated dynamin-2 activation in VSMCs. NO and CO promoted time- and
dose-dependent endocytosis of T?R1. By decreasing T?R1 surface expression through
this dynamin-2-dependent process, NO and CO diminished the effects of TGF-? on
VSMCs. These findings help explain an important mechanism by which NO and CO
signal in the vasculature by decreasing surface expression of T?R1 and the
cellular response to TGF-?.