Cisplatin-induced nephrotoxicity alters blood pressure response to angiotensin II administration in rats.

BACKGROUND: Cisplatin (CP) is an effective chemotherapeutic drug used in the clinic, which is accompanied with nephrotoxicity. CP may also disturb hemodynamics of the circulation system. We have tested the role of CP in mean arterial pressure (MAP) response to graded angiotensin (Ang) II infusion in rats.

MATERIALS AND METHODS: Male and female rats were treated with CP (2.5 mg/kg/day) for a period of 1-week and compared with the vehicle-treated animals. The blood pressure response to Ang II (100-1000 ng/kg/min) was determined under the anesthesia condition. Endothelial permeability of aorta was measured according to the Evans blue uptake. The kidney tissue was also subjected to histological investigation.

RESULTS: Significant increase in serum levels of blood urea nitrogen and creatinine and pathological findings in CP-treated rats verified CP-induced nephrotoxicity. Significant difference in percentage of change in MAP response to Ang II between male and female rats was detected in vehicle-treated groups (P < 0.05) while in CP-treated animals this response difference was not observed. The groups were not significantly different with regard to the endothelial permeability of aorta while the serum level of nitrite in male rats increased significantly following administration of CP (P < 0.05).

CONCLUSION: It seems the different response in percentage of change of MAP to graded Ang II infusion between male and female indicates the effect of CP on renin Ang system parameters.