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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 Nat+Commun
2017 ; 8
(1
): 1467
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Regulation of angiotensin II actions by enhancers and super-enhancers in vascular
smooth muscle cells
#MMPMID29133788
Das S
; Senapati P
; Chen Z
; Reddy MA
; Ganguly R
; Lanting L
; Mandi V
; Bansal A
; Leung A
; Zhang S
; Jia Y
; Wu X
; Schones DE
; Natarajan R
Nat Commun
2017[Nov]; 8
(1
): 1467
PMID29133788
show ga
Angiotensin II (AngII) promotes hypertension and atherosclerosis by activating
growth-promoting and pro-inflammatory gene expression in vascular smooth muscle
cells (VSMCs). Enhancers and super-enhancers (SEs) play critical roles in driving
disease-associated gene expression. However, enhancers/SEs mediating VSMC
dysfunction remain uncharacterized. Here, we show that AngII alters vascular
enhancer and SE repertoires in cultured VSMCs in vitro, ex vivo, and in
AngII-infused mice aortas in vivo. AngII-induced enhancers/SEs are enriched in
binding sites for signal-dependent transcription factors and dependent on key
signaling kinases. Moreover, CRISPR-Cas9-mediated deletion of candidate
enhancers/SEs, targeting SEs with the bromodomain and extra-terminal domain
inhibitor JQ1, or knockdown of overlapping long noncoding RNAs (lncRNAs) blocks
AngII-induced genes associated with growth-factor signaling and atherosclerosis.
Furthermore, JQ1 ameliorates AngII-induced hypertension, medial hypertrophy and
inflammation in vivo in mice. These results demonstrate AngII-induced signals
integrate enhancers/SEs and lncRNAs to increase expression of genes involved in
VSMC dysfunction, and could uncover novel therapies.