Samuraciclib hydrochloride (C09-1044-438)

TargetsCDK7 (Cell-free assay); CDK2 (Cell-free assay); CDK9 (Cell-free assay); CDK1 (Cell-free assay) 40 nM ;620 nM; 1.2 μM; 1.8 μMIn vitroA wide range of cancer types are sensitive to CDK7 inhibition by ICEC0942 with GI50 values ranging between 0.2-0.3 µM. ICEC0942 inhibits PolII, CDK1, CDK2 and RB (retinoblastoma) phosphorylation in the MCF7 breast cancer cell line in a time and dose-sependent manner. ICEC0942 inhibits phosphorylation of CDK7 substrates and promotes cell cycle arrest and apoptosis.In vivoIn xenografts of both breast and colorectal cancers, ICEC0942 has substantial anti-tumor effects. For pharmacokinetics, CD1 male mice are treated intravenously (IV), subcutaneously (SC) or by oral gavage (PO) with 10 mg/kg ICEC0942. In plasma, ICEC0942 levels decline in a bi-phasic manner, indicating rapid distribution into tissues. Following IV administration of ICEC0942 at 10 mg/kg in male CD1 mice Cl(plasma) is calculated at 78 ml.min/kg. Blood/plasma ratio (Bl/Pl) is 1.81. ICEC0942 has a half-life of 1.9 hrs, a moderate half-life in this species. Only a small proportion (13.5%) of ICEC0942 is metabolized after 2 and 4 hour following a single PO administration (100 mg/kg). Comparing exposure (AUCt) after single PO and IV administration at 10 mg/kg, oral bioavailability (F%) is calculated at 30%. Median Tmax for PO administration is 2 hours and is unaffected by increasing dose. Over this dose range, Cmax is linearly associated with dose, as is the total exposure over time (AUCt). In tumor-bearing mice, there is appreciable accumulation of ICEC0942 in tumors 6-hours post administration. ICEC0942 levels in tumors lag behind plasma levels.Cell Research(from reference)Cell lines：HCT116 cells Concentrations：0.1, 1, 10 μM Incubation Time：4, 8, 16, 24 h. Specifications and Purity: 98%. Molecular Formula: C22H31ClN6O. Molecular Weight: 430.97. PubChem CID: 91844732. Isomeric SMILES: CC(C)C1=C2N=C(C=C(N2N=C1)NCC3=CC=CC=C3)NC[C@H]4CCNC[C@@H]4O.Cl.