FTY720 Phosphate

FTY720 is a derivative of ISP-1 (myriocin), a fungal metabolite of the Chinese herb Iscaria sinclarii as well as a structural analog of sphingosine. It is a novel immune modulator that prolongs allograft transplant survival in numerous models by inhibiting lymphocyte emigration from lymphoid organs.{11265} In vivo, FTY720 is phosphorylated by sphingosine kinase to the physiologically active phosphoric acid ester.{11284,14769} FTY720 phosphate acts as a potent agonist at four of the sphingosine-1-phosphate (S1P) receptors (S1P1, S1P3, S1P4, and S1P5), with IC50 values of 0.2-6 nM.{11284,14769,14768}