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2017 ; 8
(ä): 128
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Hydrogen Sulfide Inhibits High-Salt Diet-Induced Myocardial Oxidative Stress and
Myocardial Hypertrophy in Dahl Rats
#MMPMID28360857
Huang P
; Shen Z
; Yu W
; Huang Y
; Tang C
; Du J
; Jin H
Front Pharmacol
2017[]; 8
(ä): 128
PMID28360857
show ga
The study aimed to examine the protective effect of hydrogen sulfide (H(2)S) on
high-salt-induced oxidative stress and myocardial hypertrophy in salt-sensitive
(Dahl) rats. Thirty male Dahl rats and 40 SD rats were included in the study.
They were randomly divided into Dahl control (Dahl + NS), Dahl high salt (Dahl +
HS), Dahl + HS + NaHS, SD + NS, SD + HS, SD + HS + NaHS, and SD + HS +
hydroxylamine (HA). Rats in Dahl + NS and SD + NS groups were given chow with
0.5% NaCl and 0.9% normal saline intraperitoneally daily. Myocardial structure,
?-myosin heavy chain (?-MHC) and ?-myosin heavy chain (?-MHC) expressions were
determined. Endogenous myocardial H(2)S pathway and oxidative stress in
myocardial tissues were tested. Myocardial H(2)S pathway was downregulated with
myocardial hypertrophy featured by increased heart weight/body weight and
cardiomyocytes cross-sectional area, decreased ?-MHC and increased ?-MHC
expressions in Dahl rats with high-salt diet (all P < 0.01), and oxidative stress
in myocardial tissues was significantly activated, demonstrated by the increased
contents of hydroxyl radical, malondialdehyde and oxidized glutathione and
decreased total antioxidant capacity, carbon monoxide, catalase, glutathione,
glutathione peroxidase, superoxide dismutase (SOD) activities and decreased SOD1
and SOD2 protein expressions (P < 0.05, P < 0.01). However, H(2)S reduced
myocardial hypertrophy with decreased heart weight/body weight and cardiomyocytes
cross-sectional area, increased ?-MHC, decreased ?-MHC expressions and inhibited
oxidative stress in myocardial tissues of Dahl rats with high-salt diet. However,
no significant difference was found in H(2)S pathway, myocardial structure, ?-MHC
and ?-MHC protein and oxidative status in myocardial tissues among SD + NS, SD +
HS, and SD + HS + NaHS groups. HA, an inhibitor of cystathionine ?-synthase,
inhibited myocardial H(2)S pathway (P < 0.01), and stimulated myocardial
hypertrophy and oxidative stress in SD rats with high-salt diet. Hence, H(2)S
inhibited myocardial hypertrophy in high salt-stimulated Dahl rats in association
with the enhancement of antioxidant capacity, thereby inhibiting oxidative stress
in myocardial tissues.