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CCT239065 is a novel, selective, and efficacious nanomolar pyridopyrazinone V600EBRAF and LCK inhibitor with IC50 of 13 and 6 nM, respectively. CCT239065 is active against oncogenic BRAF in cells. CCT239065 also inhibits BRAF, CRAF and SRC with IC50 of 81, 12 and 23 nM, respectively. CCT239065 is more than 6-fold less active against wild-type BRAF and more than 50-fold less active against EGFR2/KDR than against V600EBRAF. CCT239065 inhibits ERK1/2 phosphorylation at 5 nM in WM266.4 cells. CCT239065 achieves high levels of selectivity in vitro and at 1 μM, a concentration that is approximately 50 times higher than its IC50 value against purified V600EBRAF. CCT239065 reveals a very low plasma clearance (0.4 mL/hour) consistent with the absence of metabolism and a terminal half-life of 6.8 hours.Plasma concentrations of CCT239065 achieve over 100-fold greater than the average GI50 value for BRAF mutant cancer cell lines in vitro and are sustained above the average GI50 in plasma and muscle (used as a tumor tissue surrogate) for over 18 hours. CCT239065 is well tolerated in mice and displays excellent oral bioavailability. Inhibition of V600EBRAF-mediated signaling in human tumor xenografts is observed following oral administration of a single dose of CCT239065.
| Molecular Weight | 555.65 |
| Formula | C29H29N7O3S |
| CAS Number | 1163719-51-4 |
| Solubility (25°C) | DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
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