Cyclosporin A is a basic immunosuppresive drug after organ transplantation. Morphological and functional features of Cyclosporin A nephrotoxicity caused by Sandimmune (Sandoz) and Consupren (of the Czech origin) were investigated in male Wistar rats. Rats were subjected to a right side nephrectomy followed by 45-minute- ischemia of remaining left kidney. Sandimmune was administered to one group of animals, Consupren to another group, both in the amount of 10 mg/kg/day. The second part of the experiment was performed in animals with right side nephrectomy only (without ischemia of the left side kidney) followed by the same administration of drugs. Changes were checked the 3rd and 21st day after nephrectomy. Ischemic arterial insudation lasted in the 3rd day set of animals with nephrectomy and left kidney ischemia treated by Consupren and was lacking after Sandimmune. Microvascularization of tubular epithelial cells was observed in significant frequency in the 21st day set of animals with unilateral nephrectomy without ischemia after Consupren and not after Sandimmune. The finding correlated with significantly higher blood level of Consupren and higher creatinine concentrations in serum than those of Sandimmune in rats with unilateral nephrectomy only.
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