Cyclosporine

Ciclosporin (INN) (IPA: ) , cyclosporine (USAN) or cyclosporin (former BAN), is an immunosuppressant drug widely used post-allogeneic organ transplant to reduce the activity of the patient's immune system and so the risk of organ rejection. It has been studied in transplants of skin, heart, kidney, lung, pancreas, bone marrow and small intestine. Ciclosporin A, the main form of the drug, is a cyclic nonribosomal peptide of 11 amino acids (an undecapeptide) produced by the fungus Tolypocladium inflatum Gams, initially isolated from a Norwegian soil sample.
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Cyclosporine /cy·clo·spor·ine/ a cyclic peptide from an extract of soil fungi that selectively inhibits T cell function; used as an [more]Cyclosporine - Community and Resources

A drug used to help reduce the risk of rejection of organ and bone marrow transplants by the body. It is also used in clinical trials to make cancer cells more sensitive to anticancer drugs.