PLX038 (PEGylated SN38) and Rucaparib in Solid Tumors and Small Cell Cancers

Phase I: Dose escalation will follow the classical 3+3 trial design by Fibonacci sequence. Phase II: Maximum tolerated dose (MTD) identified in phase I. PLX038 (PEGylated SN38) will be administered as a 1 hour (-10 minutes / +30 minutes) intravenous (IV) infusion on Day 1 of each cycle (21 days).

Phase I: Dose escalation will follow the classical 3+3 trial design by Fibonacci sequence. Phase II: Maximum tolerated dose (MTD) identified in phase I. Rucaparib will be given orally at designated dose twice a day on days 5 to 19 of every 21-day cycle.

Participants will be recommended to have 8 mg of ondansetron taken with a small meal or snack to prevent nausea and vomiting approximately 30 minutes prior to each dose of rucaparib.