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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 Med+Sci+Monit
2018 ; 24
(ä): 1205-1218
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Hydrogen Sulfide Attenuates Hypertensive Inflammation via Regulating Connexin
Expression in Spontaneously Hypertensive Rats
#MMPMID29485979
Ni X
; Zhang L
; Peng M
; Shen TW
; Yu XS
; Shan LY
; Li L
; Si JQ
; Li XZ
; Ma KT
Med Sci Monit
2018[Feb]; 24
(ä): 1205-1218
PMID29485979
show ga
BACKGROUND Hydrogen sul?de (H2S) has anti-inflammatory and anti-hypertensive
effects, and connexins (Cxs) are involved in regulation of immune homeostasis. In
this study, we explored whether exogenous H2S prevents hypertensive inflammation
by regulating Cxs expression of T lymphocytes in spontaneously hypertensive rats
(SHR). MATERIAL AND METHODS We treated SHR with sodium hydrosul?de (NaHS) for 9
weeks. Vehicle-treated Wistar-Kyoto rats (WKYs) were used as a control. The
arterial pressure was monitored by the tail-cuff method, and vascular function in
basilar arteries was examined by pressure myography. Hematoxylin and eosin
staining was used to show vascular remodeling and renal injury. The percentage of
T cell subtypes in peripheral blood, surface expressions of Cx40/Cx43 on T cell
subtypes, and serum cytokines level were determined by flow cytometry or ELISA.
Expression of Cx40/Cx43 proteins in peripheral blood lymphocytes was analyzed by
Western blot. RESULTS Chronic NaHS treatment significantly attenuated blood
pressure elevation, and inhibited inflammation of target organs, vascular
remodeling, and renal injury in SHR. Exogenous NaHS also improved vascular
function by attenuating KCl-stimulated vasoconstrictor response in basilar
arteries of SHR. In addition, chronic NaHS administration significantly
suppressed inflammation of peripheral blood in SHR, as evidenced by the decreased
serum levels of IL-2, IL-6, and CD4/CD8 ratio and the increased IL-10 level and
percentage of regulatory T cells. NaHS treatment decreased hypertension-induced
Cx40/Cx43 expressions in T lymphocytes from SHR. CONCLUSIONS Our data demonstrate
that H2S reduces hypertensive inflammation, at least partly due to regulation of
T cell subsets balance by Cx40/Cx43 expressions inhibition.
|Animals
[MESH]
|Basilar Artery/drug effects/pathology
[MESH]
|Blood Pressure/drug effects
[MESH]
|Connexins/*metabolism
[MESH]
|Hydrogen Sulfide/pharmacology/*therapeutic use
[MESH]