复方肾华片对急性脑缺血再灌注损伤大鼠肾小管Na+-K+-AT酶的调节作用

Objective:To observe the effect of Compound Shenhua Tablet(复方肾华片,SHT) on the sodiumpotassium-exchanging adenosinetriphosphatase(Na~+-K~+-ATPase) in the renal tubular epithelial cells of rats with acute ischemic reperfusion and to investigate the mechanisms underlying the effects of SHT on renal ischemic reperfusion injury(RIRI).Methods:Fifty male Wistar rats were randomly divided into the sham surgery group,model group,astragaloside group150 mg/(kg-d)],SHT low-dose group1.5 g/(kg·d)]and SHT high-dose group3.0 g/(kg·d)],with 10 rats in each group.After 1 week of continuous intragastric drug administration,surgery was performed to establish the model.At either 24 or 72 h after the surgery,5 rats in each group were sacrificed,blood biochemistry,renal pathology,immunoblot and immunohistochemical examinations were performed,and double immunofluorescence staining was observed under a laser confocal microscope.Results:Compared with the sham surgery group,the serum creatinine(SCr) and blood urea nitrogen(BUN) levels were significantly increased,Na~+-K~+-ATPase protein level was decreased,and kidney injury molecule-1(KIM-1) protein level was increased in the model group after the surgery(P0.01 or P0.05).Compared with the model group,the SCr,BUN,pathological scores,Na~+-K~+-ATPase,and the KIM-1 protein level of the three treatment groups were significantly improved at 72 h after the surgery(P0.05 or P0.01).And the SCr,BUN of the SHT low- and high-dose groups,and the pathological scores of the SHT high-dose group were significantly lower than those of the astragaloside group(P0.05).The localizations of Na~+-K~+-ATPase and megalin of the model group were disrupted,with the distribution areas overlapping with each other and alternately arranged.The severity of the disruption was slightly milder in three treatment groups compared with that of the model group.The results of immunofluorescence staining showed that the SHT high-dose group had a superior effect as compared with the astragaloside group and the SHT low-dose group.Conclusions:The SHT effectively alleviated RIRI caused by ischemic reperfusion,promoted the recovery of the polarity of renal tubular epithelial cells,and protected the renal tubules.The therapeutic effects of SHT were superior to those of astragaloside as a single agent.