Effect of Lunei Xiaoyu Decoction on Vascular Endothelial AMPK/eNOS Signal in Balloon Injury Model of Common Carotid Artery in Rats

OBJECTIVE To observe the effect of Lunei Xiaoyu Decoction on vascular endothelial AMPK, eNOS expression in ballon injury model of common carotid artery in rats, and to explore its possible mechanism. METHODS Thirty two SD rats were randomly divided into sham operation group, model group, low dose of Lunei Xiaoyu Decoction(dose in clinical equivalent) group and high dose of Lunei Xiaoyu Decoction(2 times the amount of clinical) group, except the sham operation group rats only skin incision, the other rats underwent carotid artery balloon injury surgery. On the 4th day after modeling, the rats were administrated orally for 14 d, model group and sham operation group were given equal volume of physiological saline. Then all the rats were killed, HE staining observation of vascular endothelial injury and intimal hyperplasia, immunohistochemistry staining was used to detect the expression level of eNOS, and western-blot was used to detect the expression level of AMPK and eNOS. RESULTS The endometrial hyperplasia and thickness were obvious after carotid artery balloon injury in rats; and after Lunei Xiaoyu Decoction treatment, the rats’ endometrial hyperplasia and thickness were improved. The expression of AMPKand eNOS was significantly higher in Lunei Xiaoyu Decoction groups compared with the model group(P<0.05 or P<0.01). CONCLUSION Lunei Xiaoyu Decoction can upregulate the expression of AMPK/eNOS signal, in order to protecting vascular endothelial after balloon injured carotid artery in rats.