7-Fluoro-3-methyl-8-[6-(3-piperidin-1-ylpropoxy)pyridin-3-yl]-1-propan-2-ylimidazo[4,5-c]quinolin-2-one
ATM Kinase Inhibitor AZD1390 is an orally bioavailable inhibitor of ataxia telangiectasia mutated (ATM) kinase, with potential antineoplastic activity. Upon oral administration, AZD1390 targets and binds to ATM, thereby inhibiting the kinase activity of ATM and ATM-mediated signaling. This prevents DNA damage checkpoint activation, disrupts DNA damage repair, induces tumor cell apoptosis, and leads to cell death in ATM-overexpressing tumor cells. AZD1390 hypersensitizes tumors to chemo/radiotherapy. In addition, AZD1390 is able to cross the blood-brain barrier (BBB). ATM, a serine/threonine protein kinase belonging to the phosphatidylinositol 3-kinase-related kinase (PIKK) family of protein kinases, is upregulated in a variety of cancer cell types. It is activated in response to DNA double-strand breaks (DSB) and plays a key role in DNA repair.