Cyclosporin A, AdipoGen Life Sciences. Chemical. CAS: 59865-13-3. Formula: C62H111N11O12. MW: 1202.6. Isolated from Tolypocladium inflatum. Potent immunosuppressant (same as FK-506 (Prod. No. AG-CN2-0047) and rapamycin (Prod. No. AG-CN2-0025)). Forms a complex with cyclophilin. Inhibits the activity of the calcium/calmodulin-dependent protein phosphatase 2B (PP2B; calcineurin). Prevents the dephosphorylation of nuclear factor of activated T cells (NFAT) transcription factor, leading to disruption of T cell activation. Suppresses proliferation of cytotoxic T cells and inhibits the production of T cell-derived mediators such as interleukin-2 (IL-2). Prevents rejection of transplanted organs. Anti-inflammatory compound in the treatment of several inflammatory skin diseases (e.g. atopic dermatitis) and with potential anti-rheumatic activity (rheumatoid arthritis). Antibacterial. Antifungal. Antiparasitic. Apoptosis inhibitor.