Effect of ultrasound-induced hyperthermia and cis-diamminedichloride platinum II on murine renal function

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Abstract
Murine renal function was evaluated after ultrasound-induced kidney hyperthermia (42.5°C and 46,5%deg; C for 35 minutes) and the administration of cis-diamminedichloride platinum II (8 mg/kg). A quantitative immunonephelometric technique was employed to determine urinary total protein (TP) and albumin (Alb) 1–180 days post-treatment. Hyperthermia of 46.5°C elevated urinary TP excretion significantly more than that of 42.5°C cis-diamminedichloride platinum (Cis DDP) administration greatly increased urine TP with a peak mean TP concentration of 488 μg/ml, four days after Cis DDP (normal range was 26–48 μg/ml). This returned to normal by day 14. The TP excretion after 42.5°C hyperthermia with concurrent Cis DDP was similar to Cis DDP alone, implying there was no potentiation of early or late Cis-DDP-induced renal damage by hyperthermia. Late mouse mortality was greater (P = 0.08) after Cis DDP alone, than Cis DDP with 42.5°C hyperthermia. There was a statistically significant increase (P < 0.05) in the Alb/TP exccetion ratio after the addition of 42.5°C hyperthermia to Cis DDP, implying an alteration in the site or nature of the Cis DDP renal lesion by hyperthermia.