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2017 ; 7
(1
): 1334
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Hypertension reduces soluble guanylyl cyclase expression in the mouse aorta via
the Notch signaling pathway
#MMPMID28465505
Rippe C
; Zhu B
; Krawczyk KK
; Bavel EV
; Albinsson S
; Sjölund J
; Bakker ENTP
; Swärd K
Sci Rep
2017[May]; 7
(1
): 1334
PMID28465505
show ga
Hypertension is a dominating risk factor for cardiovascular disease. To
characterize the genomic response to hypertension, we administered vehicle or
angiotensin II to mice and performed gene expression analyses. AngII treatment
resulted in a robust increase in blood pressure and altered expression of 235
genes in the aorta, including Gucy1a3 and Gucy1b3 which encode subunits of
soluble guanylyl cyclase (sGC). Western blotting and immunohistochemistry
confirmed repression of sGC associated with curtailed relaxation via sGC
activation. Analysis of transcription factor binding motifs in promoters of
differentially expressed genes identified enrichment of motifs for RBPJ, a
component of the Notch signaling pathway, and the Notch coactivators FRYL and
MAML2 were reduced. Gain and loss of function experiments demonstrated that
JAG/NOTCH signaling controls sGC expression together with MAML2 and FRYL. Reduced
expression of sGC, correlating with differential expression of MAML2, in stroke
prone and spontaneously hypertensive rats was also seen, and RNA-Seq data
demonstrated correlations between JAG1, NOTCH3, MAML2 and FRYL and the sGC
subunits GUCY1A3 and GUCY1B3 in human coronary artery. Notch signaling thus
provides a constitutive drive on expression of the major nitric oxide receptor
(GUCY1A3/GUCY1B3) in arteries from mice, rats, and humans, and this control
mechanism is disturbed in hypertension.