4-[3-(4-Cyclopropanecarbonylpiperazine-1-carbonyl)-4-fluorobenzyl]-2<i>H</i>-phthalazin-1-one: A Novel Bioavailable Inhibitor of Poly(ADP-ribose) Polymerase-1
作者:Keith A. Menear、Claire Adcock、Robert Boulter、Xiao-ling Cockcroft、Louise Copsey、Aaron Cranston、Krystyna J. Dillon、Jan Drzewiecki、Sheila Garman、Sylvie Gomez、Hashim Javaid、Frank Kerrigan、Charlotte Knights、Alan Lau、Vincent M. Loh、Ian T. W. Matthews、Stephen Moore、Mark J. O’Connor、Graeme C. M. Smith、Niall M. B. Martin
DOI:10.1021/jm8001263
日期:2008.10.23
Poly(ADP-ribose) polymerase activation is an immediate cellular response to metabolic-, chemical-, or ionizing radiation-induced DNA damage and represents a new target for cancer therapy. In this article, we disclose a novel series of substituted 4-benzyl-2H-phthalazin-1-ones that possess high inhibitory enzyme and cellular potency for both PARP-1 and PARP-2. Optimized compounds from the series also demonstrate good pharmacokinetic profiles, oral bioavailability, and activity in vivo in an SW620 colorectal cancer xenograft model. 4-[3-(4-Cyclopropanecarbonylpiperazine-1-carbonyl)-4-fluorobenzyl]-2H-phthalazin-1-one (KU-0059436, AZD2281) 47 is a single digit nanomolar inhibitor of both PARP-1 and PARP-2 that shows standalone activity against BRCA1-deficient breast cancer cell lines. Compound 47 is currently undergoing clinical development for the treatment of BRCA1- and BRCA2-defective cancers.