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2016 ; 17
(8
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Resveratrol Attenuates Acute Inflammatory Injury in Experimental Subarachnoid
Hemorrhage in Rats via Inhibition of TLR4 Pathway
#MMPMID27529233
Zhang XS
; Li W
; Wu Q
; Wu LY
; Ye ZN
; Liu JP
; Zhuang Z
; Zhou ML
; Zhang X
; Hang CH
Int J Mol Sci
2016[Aug]; 17
(8
): ä PMID27529233
show ga
Toll-like receptor 4 (TLR4) has been proven to play a critical role in
neuroinflammation and to represent an important therapeutic target following
subarachnoid hemorrhage (SAH). Resveratrol (RSV), a natural occurring
polyphenolic compound, has a powerful anti-inflammatory property. However, the
underlying molecular mechanisms of RSV in protecting against early brain injury
(EBI) after SAH remain obscure. The purpose of this study was to investigate the
effects of RSV on the TLR4-related inflammatory signaling pathway and EBI in rats
after SAH. A prechiasmatic cistern SAH model was used in our experiment. The
expressions of TLR4, high-mobility group box 1 (HMGB1), myeloid differentiation
factor 88 (MyD88), and nuclear factor-?B (NF-?B) were evaluated by Western blot
and immunohistochemistry. The expressions of Iba-1 and pro-inflammatory cytokines
in brain cortex were determined by Western blot, immunofluorescence staining, or
enzyme-linked immunosorbent assay. Neural apoptosis, brain edema, and
neurological function were further evaluated to investigate the development of
EBI. We found that post-SAH treatment with RSV could markedly inhibit the
expressions of TLR4, HMGB1, MyD88, and NF-?B. Meanwhile, RSV significantly
reduced microglia activation, as well as inflammatory cytokines leading to the
amelioration of neural apoptosis, brain edema, and neurological behavior
impairment at 24 h after SAH. However, RSV treatment failed to alleviate brain
edema and neurological deficits at 72 h after SAH. These results indicated that
RSV treatment could alleviate EBI after SAH, at least in part, via inhibition of
TLR4-mediated inflammatory signaling pathway.