Description: |
SAR260301 (SAR-260301, SAR 260301) is a potent, selective, ATP-competitive PI3Kβ inhibitor with IC50 of 52 nM in TR-FRET assays, with littile to no actiivty against PI3Kα/γ/δ (IC50=1,869/>10,000/403 nM, respectively); does not inhibit mTOR (IC50 >10 uM, the only other kinase inhibited by SAR260301 was VPS34 lipid kinase (IC50=180 nM) in a panel of >400 kinases; inhibits AKT-Ser473 phosphorylation in cellular assays with IC50 of 32 nM, 26-fold, 88-fold, >94-fold, and >313-fold more potently than PI3Kδ, PI3Kα, PI3Kγ, and VPS34, respectively; inhibits the PI3K pathway preferentially in PTEN-deficient cells, synergizes with MAPK pathway inhibitors to inhibit growth of PTEN-deficient and BRAF-mutant melanoma cells in vitro and in vivo. |