Information
Agerafenib (RXDX-105, CEP-32496) is a highly potent inhibitor ofBRAF(V600E/WT)andc-RafwithKdof 14 nM/36 nM and 39 nM, also potent to Abl-1, c-Kit, Ret (c-Ret), PDGFRβ and VEGFR2, respectively; insignificant affinity for MEK-1, MEK-2, ERK-1 and ERK-2. Phas
In vitro
CEP-32496 inhibits A375 cell (BRAFV600E) proliferation with EC50 of 78 nM. CEP-32496 exhibits more sensitive cytotoxicity for tumor cell lines (A375, SK-MEL-28, Colo-205, Colo-679, and HT-144) expressing mutant BRAF than those expressing wild-type BRAF (HCT116, Hs578T, LNCaP, DU145, and PC-3). CEP-32496 inhibits mitogen-activated protein (MAP)/extracellular signal-regulated (ER) kinase (MEK) phosphorylation (pMEK) in human melanoma (A375) and colorectal cancer (Colo-205) cell lines with IC50 of 78 nM and 60 nM, respectively.
In vivo
CEP-32496 exhibits good stability in mouse, dog, monkey, and human liver microsomal preparations with measured intrinsic clearance values of <23 (μL/min)/mg and t1/2 > 60 min in all assays. CEP-32496 (30 mg/kg, orally, BID) exhibits tumor stasis and a 40% incidence of partial tumor regressions (PRs) in Colo-205 xenograft mouse model, whereas the 100 mg/kg dose group exhibits both tumor stasis and an 80% incidence of PRs. CEP-32496 (30 mg/kg, orally, BID) leads to a 50% and 75% inhibition of normalized pMEK in tumor lysates at the 2 hours and 6 hours postdose time point, respectively, while a 55 mg/kg dose results in a 75% to 57% inhibition of pMEK at 2 hours through 10 hours post administration in Colo-205 xenograft mouse model. CEP-32496 is orally bioavailable in multiple preclinical species (>95% in rats, dogs, and monkeys). CEP-32496 (100 mg/kg) results in inhibition of pMEK and pERK and sustained tumor stasis and regressions in BRAF(V600E) colon carcinoma xenografts in nude mice.
Cell Data
cell lines：
Concentrations：78 nM
Incubation Time：72 hours
Powder Purity:≥99%
