Effects of resveratrol on expression of renal fibrosis proteins ORP150, GRP78, and GRP94 in rat kidney tissue / 中草药

ABSTRACT

Objective To assess the effect of resveratrol on the expression of endoplasmic reticulum stress molecular partners150-KD oxygen-regulated protein (ORP150) in renal tissues of rats with unilateral ureteral obstruction (UUO). Methods The UUO rat model of renal interstitial fibrosis was established. The rats were randomly divided into sham operation group, model group, enalapril group, the high-dose, medium-dose and low-dose groups of resveratrol, each group of 10. After 14 d of surgery, rats were sacrificed to collect serum and kidney tissue to detect the level of serum Scratinine (Scr) and blood urea nitrogen (BUN); Pathological changes were stained by HE to evaluate of renal tubular damage index, renal interstitial collagen deposition area was detected by Masson staining, apoptosis of in situ cell in renal tissue was determined by TUNEL assay, and using the western blot for the detection of protein expression of ORP150, GRP78, and GRP94 in renal tissue. Results After comparison of the treatment groups with model group, BUN and Scr levels in serum were significantly reduced in high-dose resveratrol group, the damage degree of renal tubules was significantly reduced, the relative area of the renal interstitial collagen decreased, In addition, the expression of ORP150 was increased (P < 0.05, 0.01), GRP78 and GRP94 proteins expression were significantly reduced, (P < 0.05, 0.01). Moreover, the resveratrol high-dose group seems more effective than enalapril groups in reversing the phenotype (P < 0.05). Conclusion Resveratrol was able to protect renal function, alleviate hydronephrosis, reduce interstitial injury of renal tubular, induce the expression of the key endoplasmic reticulum stress signal molecule ORP150 and the down-regulated molecular partner GRP78 and GRP94, delay the apoptosis of renal tubular epithelial cell of rats after UUO and inhibit renal interstitial fibrosis caused by apoptosis deposition.