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

Part of paid clinical trials in Bethesda, Maryland.

Sponsor
National Cancer Institute (NCI)
Study ID
NCT04209595
Phase
PHASE1/PHASE2
Status
Completed

Conditions

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • PLX038 — DRUG
    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).
  • Rucaparib — DRUG
    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.
  • Ondansetron — DRUG
    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.

Study Details

Background: Drugs known as poly-adenosine diphosphate ribose polymerase (PARP) inhibitors are known to help stop tumor growth in patients with breast, ovarian cancers and many other cancers including prostate and pancreatic cancers. Many research studies done in animals and human cells have shown that these types of drugs can improve how well chemotherapy works. Standard chemotherapy can be too toxic to be combined with PARP inhibitors. In this study, we use a new form of chemotherapy called PLX038 (PEGylated SN38) to see if it can be safely combined with PARP inhibitors to shrink tumors. Objective: To find a safe combination of PLX038 and rucaparib, and to see if this mix will cause tumors to shrink. Eligibility: People age 18 and older with solid tumors, small cell lung cancer (SCLC), or small cell cancer outside their lungs. Design: Participants will be screened with: Physical exam Blood tests Records of their diagnosis (or they will have a tumor biopsy). A review of their symptoms and medications. A review of their ability to perform their normal activities. Electrocardiograms, to measure the electrical activity of the heart. Computed tomography (CT) scans of the chest, abdomen, and pelvis. CT scans are a series of X-rays. Participants will get PLX038 by intravenous catheter on Day 1 of each cycle (1 cycle = 21 days). For this, a small plastic tube is put into an arm vein. They will take rucaparib twice daily by mouth on Days 3 to 19 of each cycle. They will keep a medicine diary. Participants may give a hair sample. They may have optional tumor biopsies. Screening tests are repeated throughout the study. About 30 days after treatment ends, participants will have a safety follow-up visit. They will give blood samples, talk about their health, and get a physical exam. Then they will be called or emailed every 6 months....

Key Dates

Start date
Apr 8, 2020
Status verified
Mar 2025
Primary completion
Aug 13, 2021
Completion
Feb 24, 2025

Study Design

Enrollment
10 participants (actual)
Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT

Arms

  • Experimental: Phase I Arm 1 Level -1A, PLX038 (PEGylated SN38) 1.3 g/m^2 and Rucaparib 200 mg
    Phase I - Participants with solid tumors enrolled to PLX038 (PEGylated SN38) and rucaparib escalation dose levels. PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 200 mg by mouth (PO)
  • Experimental: Phase I Arm 1 Level 1, PLX038 (PEGylated SN38) 1.3 g/m^2 and Rucaparib 400 mg
    Phase I - Participants with solid tumors enrolled to PLX038 (PEGylated SN38) and rucaparib escalation dose levels. PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 400 mg by mouth (PO)
  • Experimental: Phase I - Arm 1 Level 1A, PLX038 (PEGylated SN38) 1.3 g/m^2 and Rucaparib 300 mg
    Phase I Participants with solid tumors enrolled to PLX038 (PEGylated SN38) and rucaparib escalation dose levels. PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 300 mg by mouth (PO)
  • Experimental: Phase IIA Arm 2
    Phase IIA Participants with small cell lung cancer (SCLC) enrolled at the maximum tolerated dose (MTD) of PLX038 (PEGylated SN38) and rucaparib after the MTD of PLX038 and rucaparib is established. Level 2, PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 3, PLX038, every 3 weeks, 1.7 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 4, PLX038, every 3 weeks, 2.3 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 2A PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 400 mg by mouth (PO); and/or Level 3A. PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 600 mg by mouth (PO).
  • Experimental: Phase IIB Arm 2
    Phase IIB Participants with extra-pulmonary small cell carcinomas enrolled at the maximum tolerated dose (MTD) of PLX038 (PEGylated SN38) and rucaparib after the MTD of PLX038 and rucaparib is established. Level 2, PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 3, PLX038, every 3 weeks, 1.7 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 4, PLX038, every 3 weeks, 2.3 g/m\^2, intravenous (IV); Rucaparib, days 3-19 twice a day (BID), total dose, 600 mg by mouth (PO); Level 2A PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 400 mg by mouth (PO); and/or Level 3A. PLX038, every 3 weeks, 1.3 g/m\^2, intravenous (IV); Rucaparib, days 5-19 twice a day (BID), total dose, 600 mg by mouth (PO).

Primary Outcome Measure

Phase II: Clinical Benefit Rate [ Time Frame: Disease progression at 4 months ]

Locations (1)

FacilityCityStateZIPSite coordinators
National Institutes of Health Clinical CenterBethesdaMaryland20892-

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By condition
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By specialty
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By research site
National Institutes of Health Clinical Center· Bethesda, MD

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