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2016 ; 17
(10
): ä Nephropedia Template TP
Zhan J
; Wang K
; Zhang C
; Zhang C
; Li Y
; Zhang Y
; Chang X
; Zhou Q
; Yao Y
; Liu Y
; Xu G
Int J Mol Sci
2016[Sep]; 17
(10
): ä PMID27690015
show ga
Grape seed proanthocyanindin extract (GSPE) is a polyphenolic bioflavonoid
derived from grape seeds and has been widely studied for its potent antioxidant,
anti-inflammatory and antitumor activities. HMGB1 is a newly discovered
danger-associated molecular pattern (DAMP) that has potent proinflammatory
effects once released by necrotic cells. However, the effect of GSPE on the
HMGB1, and the relationship of those two with acute kidney injury and chronic
kidney fibrosis are unknown. This study aimed to investigate the impact of GSPE
on acute kidney injury and chronic fibrosis. C57bl/6 mice were subjected to
bilateral ischemia/reperfusion (I/R) and unilateral I/R with or without GSPE
administration. After bilateral I/R, mice administered GSPE had a marked
improvement in renal function (BUN and Cr), decreased pathological damage and
reduced inflammation. In unilateral I/R, mice subjected GSPE showed reduced
tubulointerstitial fibrosis and decreased inflammatory reaction. The
renoprotection of GSPE on both models was associated with the inhibition of HMGB1
nucleocytoplasmic shuttling and release, which can amplify the inflammation
through binding to its downstream receptor TLR4 and facilitated P65
transcription. Thus, we have reason to believe that GSPE could be a good
alternative therapy for the prevention and treatment of IR-induced renal injury
and fibrosis in clinical practice.