Response to PARP Inhibitor Predicted by the RAD51 Assay

Subjects in part A and part B will all start treatment with oral veliparib monotherapy twice a day. Patients will receive oral veliparib BID on days 1- 21, q3 weeks. All subjects will start with veliparib 300 mg, if the subject tolerates 300 mg BID for 2 weeks, veliparib may be increased to 400 mg BID at the investigator's discretion. Subjects will self-administer the morning dose and the evening dose of veliparib approximately 12 hours after the morning dose with or without food. ANC must be above 1.5 × 109/L in order to commence a new cycle.