Description
Sphingosine kinase (SphK) is a conserved lipid kinase that catalyzes formation sphingosine-1-phosphate (S1P) from the precursor sphingolipid sphingosine. The two known kinases, sphingosine kinase 1 (SphK1) and sphingosine kinase 2 (SphK2), have different developmental and tissue expression patterns, suggesting that they have distinct physiological functions. CAY10621 is an inhibitor of SPHK1 with IC50 of 3.3 µM. It is selective for SphK1 over Sph2 at 10 µM and PKC at concentrations less than 100 µM. CAY10621 inhibits SphK1 activity by 70% in U937 cells at 5 µM