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Current development of clinical inhibitors of poly(ADP-ribose) polymerase in oncology Ratnam K; Low JAClin Cancer Res 2007[Mar]; 13 (5): 1383-8Poly(ADP-ribose) polymerase (PARP) is a nuclear enzyme that signals the presence of DNA damage by catalyzing the addition of ADP-ribose units to DNA, histones, and various DNA repair enzymes and by facilitating DNA repair. PARP has been gaining increasing interest as a therapeutic target for many diseases and especially for cancer. Inhibition of PARP potentiates the activity of DNA-damaging agents, such as alkylators, platinums, topoisomerase inhibitors, and radiation in in vitro and in vivo models. In addition, tumors with DNA repair defects, such as those arising from patients with BRCA mutations, may be more sensitive to PARP inhibition. At least five different companies have now initiated oncology clinical trials with PARP inhibitors, ranging in stage from phase 0 to phase 2. This review summarizes the preclinical and clinical data currently available for these agents and some of the challenges facing the clinical development of these agents.|Animals[MESH]|Antineoplastic Agents/*pharmacology[MESH]|Clinical Trials as Topic[MESH]|Enzyme Inhibitors/*pharmacology[MESH]|Humans[MESH]|Poly(ADP-ribose) Polymerases/*drug effects/*metabolism[MESH] |
