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2016 ; 2016
(ä): 8128957
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Hydrogen Sulfide Improves Endothelial Dysfunction via Downregulating BMP4/COX-2
Pathway in Rats with Hypertension
#MMPMID27642495
Xiao L
; Dong JH
; Jin S
; Xue HM
; Guo Q
; Teng X
; Wu YM
Oxid Med Cell Longev
2016[]; 2016
(ä): 8128957
PMID27642495
show ga
Aims. We object to elucidate that protective effect of H2S on endothelium is
mediated by downregulating BMP4 (bone morphogenetic protein 4)/cyclooxygenase-
(COX-) 2 pathway in rats with hypertension. Methods and Results. The hypertensive
rat model induced by two-kidney one-clip (2K1C) model was used. Exogenous NaHS
administration (56??mol/kg/day, intraperitoneally once a day) reduced mean
arterial pressure (MAP) of 2K1C rats from 199.9 ± 3.312?mmHg to 159.4 ±
5.434?mmHg, while NaHS did not affect the blood pressure in the Sham rats and
ameliorated endothelium-dependent contractions (EDCs) of renal artery in 2K1C
rats. 2K1C reduced CSE level twofold, decreased plasma levels of H2S about
6-fold, increased BMP4, Nox2, and Nox4 levels 2-fold and increased markers of
oxidative stress MDA and nitrotyrosine 1.5-fold, upregulated the expression of
phosphorylation-p38 MAPK 2-fold, and increased protein levels of COX-2 1.5-fold,
which were abolished by NaHS treatment. Conclusions. Our results demonstrate that
H2S prevents activation of BMP4/COX-2 pathway in hypertension, which may be
involved in the ameliorative effect of H2S on endothelial impairment. These
results throw light on endothelial protective effect of H2S and provide new
target for prevention and therapy of hypertension.