Use of PARP Inhibitors for Ovarian Cancer

PARP inhibitors have been used to treat numerous diseases, but these agents have been approved the longest for use in ovarian cancer. All trials of PARP inhibitor maintenance in newly diagnosed ovarian cancer are positive for prolonged progression-free survival (PFS), but patients with BRCA mutations consistently derive the most benefit. Testing for homologous recombination deficiency may provide information regarding the degree of PFS benefit. In individuals without a BRCA mutation, PARP inhibition also prolongs PFS after chemotherapy for platinum-sensitive, PARP-naive disease. As in the up-front setting, patients with BRCA mutations derive the most benefit in these trials. Finally, PARP inhibitors are active as monotherapy in PARP-naive, BRCA-mutated relapsed disease, with increased activity observed in platinum-sensitive versus platinumresistant disease.