Abstract
Palmijihwang-tang is an herbal formula frequently used to treat many symptoms, such as lumbago, pollakiuria, cold hands and feet, nephritis, sterilitas virilis, and prostatic disorders. The aim of this study was to investigate the effects of Palmijihwang-tang on cisplatin-induced nephrotoxicity in rat kidney proximal tubular NRK-52E cells. NRK-52E cells were treated with Palmijihwang-tang in absence or presence of 30 μM cisplatin for 12 or 24 h. Palmijihwang-tang at concentrations of 50-800 μg/ml did not change the cell viability in NRK-52E cells, and showed no significant toxicity. Palmijihwang-tang at concentrations of 400 and 800 μg/ml significantly increased the cell viability and reduced apoptotic cells in NRK-52E cells exposed to cisplatin. Also, Palmijihwang-tang markedly inhibited cisplatin-induced caspase-3 activation, PARP cleavage, ROS production and p53 activation in NRK-52E cells. Furthermore, Palmijihwang-tang did not interfere with the antitumor activity of cisplatin in AGS and A549 cancer cells. Particularly, Palmijihwang-tang enhanced antitumor activity of cisplatin in A549 cells. Taken together, these results suggest that Palmijihwang-tang ameliorated cisplatin-induced nephrotoxicity through reduction of ROS production and p53 activation, and did not interrupt antitumor efficacy of cisplatin against cancer cells.
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