CP-466722 is rapidly reversible potential ATM kinase inhibitor.

CP-466722 is non-toxic and does not inhibit PI3K or PI3K-like protein kinase family members in cells. CP-466722 inhibited cellular ATM-dependent phosphorylation events and disruption of ATM function resulted in characteristic cell cycle checkpoint defects. Inhibition of cellular ATM kinase activity was rapidly and completely reversed by removing CP-466722. Interestingly, clonogenic survival assays demonstrated that transient inhibition of ATM is sufficient to sensitize cells to ionizing radiation and suggests that therapeutic radiosensitization may only require ATM inhibition for short periods of time. The ability of CP-466722 to rapidly and reversibly regulate ATM activity provides a new tool to ask questions about ATM function that could not easily be addressed using genetic models or RNA interference technologies.

KU-60019

KU-55933

CGK733

TTP 22

TH-302

URB597

URB 754

UK 383367

VU 0364439

VX 770