BMN 673 (Talazoparib), an Oral PARP Inhibitor, in People With Deleterious BRCA1/2 Mutation-Associated Ovarian Cancer Who Have Had Prior PARP Inhibitor Treatment

Ovarian Cancer Clinical Trial

Official title: A Phase 2 Pilot Study of BMN 673 (Talazoparib), an Oral PARP Inhibitor, in Patients With Deleterious BRCA1/2 Mutation-Associated Ovarian Cancer Who Have Had Prior PARP Inhibitor Treatment

Status Terminated

Clinical Trial Summary

Background:

• The new drug BMN 673 (talazoparib) has been shown to fight tumor cells in animals and some people. It is a poly (ADP-ribose) polymerase (PARP) inhibitor. It works on tumor cell deoxyribonucleic acid (DNA) damage repair process. Researchers want to see if BMN 673 shrinks cancer again in women with ovarian cancer and whose cancer initially got shrunk but grew back on the first PARP inhibitor.

Objective:

• To study BMN 673 (talazoparib) in people with ovarian cancer born with a breast cancer (BRCA) mutation and whose cancer got shrunk but became worse after they took a similar drug.

Eligibility:

• Women at least 18 years old:

• with recurrent and/or metastatic germline breast cancer mutation (gBRCAm)-associated ovarian cancer AND

• whose disease is growing after already being treated with PARP inhibitors AND

• with no other treatment(s) in between the first PARP inhibitors and a screening visit.

Design:

• Participants will be screened with medical history, physical exam, and heart and blood tests.

• Participants will take the study drug by mouth once daily. They will take the drug in 28-day cycles.

• They will keep a diary of doses and any side effects.

• Participants will have 4 study visits in cycle 1, then 1 visit every cycle. Visits may include:

• Blood tests

• Physical exam

• Computed tomography (CT) or magnetic resonance imaging (MRI) scans. Participants will lie in a machine that takes pictures of their body.

• Ultrasound

• Participants will have a biopsy before starting the study drug. A small piece of tumor tissue will be removed by needle, guided by a scan. They may have two more biopsies later.

• Participants will be followed for 30 days after taking the last dose of study drug. A physical exam, blood tests, and CT or other scans will be done.

• Participants will have follow-up calls to ask about any side effects.

Clinical Trial Description

Background:

• Patients with germline BRCA1/2 mutations (gBRCAm) demonstrate repeated therapeutic susceptibility to deoxyribonucleic acid (DNA) damaging agents, especially platinums, even if they have previously progressed on a similar (platinum-based) regimen.

• Poly (ADP-ribose) polymerase (PARP) inhibitors (PARPi) have clinical activity in gBRCAm-associated malignancies, although patients eventually develop progressive disease.

• BMN 673 (talazoparib) is a novel PARPi, with excellent oral bioavailability and greater anti-tumor activity in vitro and in vivo at lower concentrations than first generation PARPi.

• It is unknown whether secondary BRCA mutations or other potential mechanisms of clinical resistance portend cross-resistance to a highly potent PARPi.

Objectives:

-To determine the objective response rate (complete response (CR)+partial response (PR)) of single agent BMN 673 (talazoparib) in ovarian cancer patients with gBRCAm who have progressed on prior PARPi therapy.

Eligibility:

• Women with recurrent and/or metastatic gBRCAm-associated ovarian cancer, with progression on PARPi monotherapy within the immediate prior 2 months of the time of screening visit.

• Patients should have responded to their prior PARPi therapy (CR, PR or stable disease (SD)>4months).

• Patients cannot have received another therapy between stopping their first PARPi therapy\ and initiating therapy on this trial, but must be off the prior PARPi for at least 4 weeks.

• Eastern Cooperative Oncology Group (ECOG) performance status 0-2 and adequate organ and marrow function.

Design:

• This is an open label, single arm phase II trial to examine activity of BMN 673 (talazoparib).

• Patients will receive BMN 673 (talazoparib) at the recommended phase 2 dose (RP2D) of 1mg p.o. once daily on 28 day cycles.

• Research samples including whole blood, plasma, circulating tumor cells (CTCs), and tumor biopsies will be obtained for progressive disease (PD) endpoints at baseline, cycle 1 day 29 (prior to cycle 2 day 1), and/or at progression in all patients.

• Patients will be evaluated every two cycles for response using Response Evaluation Criteria in Solid Tumors (RECIST)v1.1 criteria and every cycle for safety using Common Terminology Criteria in Adverse Events (CTCAE)v4.0. ;

Related Conditions & MeSH terms

• Carcinoma, Ovarian Epithelial
• Ovarian Cancer
• Ovarian Neoplasms

• NCT number: NCT02326844
• Study type: Interventional
• Source: National Institutes of Health Clinical Center (CC)
• Status: Terminated
• Phase: Phase 2
• Start date: March 2, 2015
• Completion date: April 14, 2016