Evaluation of cyclosporine-A obtained from Tolypocladium sp. for immunosuppressive potential

Cyclosporine-A obtained from an indigenous isolate of Tolypocladium sp. was evaluated for immunosuppressive potential by skin grafting in rats using the commercially available Sandimmune as reference at 15 and 30 mg/kg/day for a period of 14 days. The Sandimmune treated animal group showed 83 per cent acceptance of skin grafts while the test preparation treated group showed 67-83 per cent acceptance. The degree of nephro- and hepatotoxicity was comparable for both the preparations.