688036-19-3

SU-11752 is a potent and selective DNA-PK inhibitor. Inhibition kinetics and a direct assay for ATP binding showed that SU11752 inhibited DNA-PK by competing with ATP. SU11752 inhibited DNA double-strand break repair in cells and gave rise to a five-fold sensitization to ionizing radiation. At concentrations of SU11752 that inhibited DNA repair, cell cycle progression was still normal and ATM kinase activity was not inhibited.

SU-11752 是一种 DNA 依赖性蛋白激酶 (DNA-PK) 抑制剂，IC50 为 0.13 μM。SU-11752 抑制 PI3K p110γ 激酶，IC50 为 1.1 μM。SU-11752 竞争性结合 DNA-PK 中的 ATP 位点，导致细胞内 DNA 双链断裂修复被抑制，并增加细胞对放射疗法的敏感性。