CC-671

CC-671 is a dual TTK protein kinase/CDC2-like kinase (CLK2) inhibitor with IC₅₀s of 0.005 and 0.006 μM for TTK and CLK2, respectively. IC50 & Target: IC50: 0.005 μM (TTK), 0.006 μM (CLK2)^[1] In Vitro: CC-671 (compound 23) is a dual TTK protein kinase/CDC2-like kinase (CLK2) inhibitor with IC₅₀s of 0.005 and 0.006 μM for TTK and CLK2, respectively. HCT-116 cell lysates treated with CC-671 at 3 μM for 1 h demonstrates that only four kinases show cellular binding of 75% or more including CLK2, CAMKK2, PIP4K22, and JNK^[1]. In Vivo: CC-671 (compound 23) demonstrates significant tumor growth inhibition (TGI) ((vehicle -treated/vehicle) ×100%) of 71% at both 10 and 20 mg/kg on a every 3 days (q3d) dosing schedule. The body weight loss (BWL) in the CC-671 treated group (20 mg/kg ) is higher than in the 10 mg/kg group (17% vs 5%)^[1].