The effects of PNS on the expression of Bax and caspase9 in rat renal tissue detected using immunohistochemical method. A, D, G: The control group at day 1, 4 and 8; B, E, H: The cisplatin-only group at day 1, 4 and 8; C, F, I: The cisplatin-PNS group at day 1, 4 and 8. The results are presented as the means ± SE. *P < 0.01 when compared with the control group, #P < 0.01 when compared with the cisplatin-only group.