Zotarolimus

Zotarolimus (ABT-578, A 179578) is a semi-synthetic analogue of rapamycin, inhibits FKBP-12 binding with IC50 of 2.8 nM and shows less potent systemic immunosuppression than rapamycin; effectively inhibits both smooth muscle cell and endothelial cell proliferation, with IC50 values of 2.9 nM and 2.6 nM, respectively; exhibits high-affinity binding to the immunophilin FKBP12, inhibiting in vitro proliferation of both human and rat T cells; inhibits Con A-induced human T cells with IC50 of 7.0 nM; reduce early complications and improve late clinical outcomes in patients needing interventional cardiology.