Mechanism of kidney lesion in rats suffered from obstructive jaundice / 第三军医大学学报

ABSTRACT

Objective To explore the lesion mechanism and the apoptosis related protein changes of kidney in rat suffered from obstructive jaundice. Methods Choledocho-ligation methods was used to create rat obstructive jaundice model. Six rats in the normal control group and thirty rats of experiment group were observed at day 1, 3, 6,10 and 14 after rat model establishment. HE staining for kidney pathological changes, TUNEL staining for cell apoptosis, SABC for apoptotic related proteins of survivin and bax, xanthine oxidase method for SOD activity and thiobarbiturate method for MAD content were carried out. Results Renal tubular epithelial cell necrosis, cell shedding and aggregation were the main pathological changes in the experiment group. In the experiment group, the apoptosis ratio increased significantly, and reached the peak of (25.2?2.8)% on postoperative day 14. The relative gray value of survivin in the experiment group decreased significantly and of bax increased significantly. The plasma SOD activity in the normal group was (193.6?23.5) U/L, but it in the experiment group decreased significantly. The plasma MDA content and the endotoxin level in the experiment group increased significantly. Conclusion Cell apoptosis is one of the lesion mechanisms of kidney in rats suffered from obstructive jaundice. The down-regulation of survivin and the up-regulation of bax may be the biological factor in the occurrence of apoptosis. The increasing of free radical and endotoxin are important factors in the kidney lesion.