Effect of age on vanadium nephrotoxicity in rats.

The present study was designed to assess potential age dependent differences of vanadium nephrotoxicity in the rat following parenteral administration of vanadate. Young (22 days) and adult (62 days) male Sprague-Dawley rats received i.p. injections of sodium orthovanadate at 10 mg/kg/day for 8 consecutive days. Two additional groups of control rats received i.p. injections of 0.9% saline during the same period. Significant age-differences were found in most of the parameters used as indicators of nephrotoxicity in young and adult rats, with adverse renal effects being more severe with age. Vanadium-induced morphologic changes in the kidney were also more pronounced with age. These findings agree with a higher renal concentration of vanadium in the group of adult rats treated with vanadate than in the vanadate-untreated group. The current results can be of concern if in the future, vanadium compounds can be administered in the treatment of diabetic patients.