Afuresertib (GSK2110183) is an orally bioavailable inhibitor of the serine/threonine protein kinase Akt (protein kinase B) with potential antineoplastic activity.

PKCθ:510 nM, Akt2:2 nM(Ki), Akt3:2.6 nM(Ki), Akt1:0.08 nM(Ki), ROCK:100 nM, PKCη:210 nM, PKCβI:430 nM

Overall 65% of hematological cell lines were sensitive to Afuresertib with an EC50 < 1 μM. 21% of solid tumor cell lines tested had an EC50 < 1 μM for Afuresertib. Afuresertib inhibited the kinase activity of the E17K AKT1 mutant protein with an EC50 of 0.2 nM. Afuresertib showed Afuresertib showed a concentration-dependent effect on the phosphorylation levels of multiple AKT substrates, including GSK3b, PRAS40, FOXO and cystatin 9.

Overall 65% of hematological cell lines were sensitive to Afuresertib with an EC50 < 1 μM. 21% of solid tumor cell lines tested had an EC50 < 1 μM for Afuresertib. Afuresertib inhibited the kinase activity of the E17K AKT1 mutant protein with an EC50 of 0.2 nM. Afuresertib showed Afuresertib showed a concentration-dependent effect on the phosphorylation levels of multiple AKT substrates, including GSK3b, PRAS40, FOXO and cystatin 9.

Potency (Ki*) of afuresertib: The true potency (Ki*) of the inhibitor is initially determined at low enzyme concentrations (0.1 nM AKT1, 0.7 nM AKT2, and 0.2 nM AKT3) using a filter binding assay and then confirmed with progress curve analysis. In the filter binding assay, a pre-mix of enzyme plus inhibitor is incubated for 1 h and then added to a GSKα peptide (Ac-KKGGRARTSS-FAEPG-amide) and [γ33P] ATP. Reactions are terminated after 2 h and the radio labeled AKT peptide product is captured in a phospho-cellulose filter plate. Progress curve analysis utilizes continuous real-time fluorescence detection of product formation using the Sox-AKT-tide substrate (Ac-ARKRERAYSF-d-Pro-Sox-Gly-NH2).

A 3-day proliferation assay using CellTiter-Glo is performed to measure the growth inhibition by the compounds at 0-30 μM. Cell growth is determined relative to untreated (DMSO) controls. EC50's are calculated from inhibition curves using a 4- or 6-parameter fitting algorithm in the Assay Client application.(Only for Reference)