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

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02326844
Recruitment Status : Terminated (Study was closed by the Cancer Therapy Evaluation Program (CTEP))
First Posted : December 30, 2014
Results First Posted : May 24, 2017
Last Update Posted : August 27, 2018
Information provided by (Responsible Party):
Jung-Min Lee, M.D., National Institutes of Health Clinical Center (CC)

Brief Summary:


- 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.


- 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.


  • 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.


  • 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.

Condition or disease Intervention/treatment Phase
Ovarian Cancer Drug: BMN 673 (talazoparib) Phase 2

Detailed Description:


  • 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.


-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.


  • 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.


  • 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.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 3 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
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
Actual Study Start Date : March 2, 2015
Actual Primary Completion Date : April 14, 2016
Actual Study Completion Date : April 14, 2016

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Ovarian Cancer

Arm Intervention/treatment
Experimental: Ovarian Cancer Patients
Ovarian cancer patients with germline breast cancer mutation (gBRCAm) who have progressed on prior poly (ADP-ribose) polymerase inhibitor (PARPi) therapy
Drug: BMN 673 (talazoparib)
1 mg by mouth (p.o.) once daily on 28-day cycles until disease progression

Primary Outcome Measures :
  1. Objective Response (Complete Response (CR) + Partial Response (PR)) [ Time Frame: Every 2 cycles, an average of 64 days ]
    Objective response (complete response (CR) + partial response (PR)) was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 criteria. CR is disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial response is at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum diameters.

Secondary Outcome Measures :
  1. Number of Participants With Serious and Non-serious Adverse Events [ Time Frame: 15 months ]
    Here is the number participants with serious and non-serious adverse events assessed by the Common Terminology Criteria in Adverse Events v4.0. For a detailed list of events, see the adverse event module.

  2. Duration of Response [ Time Frame: 3 months ]
    Duration of response is the time between study enrollment and off-treatment date.

  3. Progression Free Survival (PFS) on BMN673 (Talazoparib) to PFS From First Poly (ADP-ribose) Polymerase Inhibitor (PARPPi) Exposure [ Time Frame: 3 months ]
    The median time to progression after receiving BMN673 will be compared informally to the time of progression for the same patients after receiving an initial PARPi exposure. Progression is at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more lesions is also considered progressions).

Other Outcome Measures:
  1. Forkhead Box 03 (FOXO3a), p53-binding Protein 1 (53BP1) and RAD51 (i.e., Eukaryote Gene) Biomarkers [ Time Frame: Baseline ]
    Patients will undergo a mandatory biopsy at baseline and reverse phase protein microarray (RPPA)26 testing will be performed to determine the potential predictive biomarkers of subsequent poly (adenosine diphosphate [ADP]) ribose polymerase inhibitors (PARPi ) response.

  2. Secondary Mutation of Breast Cancer 1 (BRCA1) and Breast Cancer 2 (BRCA2) [ Time Frame: Baseline ]
    Patients will undergo a mandatory biopsy at baseline and Next Generation Sequencing to elucidate the secondary mutations of BRCA1 and BRCA2 will be performed.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 99 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
  • Recurrent, and/or metastatic germline breast cancer (BRCA) 1/2 mutation-associated ovarian cancer, with progression on a poly (ADP-ribose) polymerase (PARP) inhibitor monotherapy after attaining a response to that PARPi (complete response (CR), partial response (PR), or stable disease (SD) greater than or equal to 4mo)
  • Progression should have occurred within the immediate prior 2 months of the time of screening visit, with no intervening anti-cancer therapy.
  • Patients must be at least 4 weeks from the last dose of prior PARP inhibitor.
  • All patients must have at least one lesion deemed safe to biopsy and be willing to undergo mandatory baseline biopsy. It is preferred that this lesion be a lesion that progressed or arose while on the prior PARP therapy.
  • Histopathologic diagnosis of ovarian cancer (including primary peritoneal and fallopian tube cancers) must be confirmed in the Laboratory of Pathology, National Cancer Institute (NCI).
  • Age greater than or equal to18 years.
  • Eastern Cooperative Oncology Group (ECOG) performance status less than or equal to 2 (Karnofsky greater than or equal to 60%.
  • Patients must have normal organ and marrow function as defined below:

    • absolute neutrophil count greater than or equal to 1,500/mcL
    • platelets greater than or equal to100,000/mcL
    • total bilirubin less than or equal to 1.5X upper limit of normal, unless known Gilberts syndrome
    • Aspartate aminotransferase (AST)(serum glutamic oxaloacetic transaminase (SGOT)/alanine aminotransferase (ALT)(serum glutamic pyruvic transaminase (SGPT) less than or equal to 3 x institutional upper limit of normal
    • creatinine < 1.5 X upper limit of normal


  • measured creatinine clearance >60 mL/min/1.73 m(2) for patients with serum creatinine levels > 1.5 x upper limit of normal.
  • hemoglobin greater than or equal to 10 mg/dL (in the absence of transfusion within 24 hours prior to dosing).

    • All patients must have measurable disease by Response Evaluation Criteria in Solid Tumors (RECIST).
    • Use of raloxifene for bone health is allowed.
    • Patients must be at least 1 week from the last dose of complementary or alternative medications.
    • Patients who have had major surgery must be fully recovered and greater than or equal to 4 weeks postoperative prior to enrolling on study.
    • Women of child-bearing potential must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study

participation, and for at least three months following the last dose of experimental therapy and must have a negative urine or serum pregnancy test within 7 days prior to the start of the study.

  • Patient must be able to swallow pills.
  • Integral biomarkers: all patients who are eligible for the study due to a history of positive BRCA1/2 mutation must provide documented evidence of their deleterious germline mutation status, obtained in a Clinical Laboratory Improvement Amendment (CLIA)-certified laboratory, including but not limited to Myriad Genetics prior to study enrollment. Variants of uncertain significance (VUS) of BRCA1/2 and BRCA1/2 somatic mutations are not considered deleterious germline BRCA1/2 mutations. Due to the long acceptance of BRCA 1 and BRCA 2 mutation testing through Myriad, Myriad results will be acceptable. If testing for BRCA 1 and BRCA 2 mutation is done by other organizations, a genetic consultation report from a qualified medical professional confirming that the laboratory results showed a recognized germ line deleterious BRCA 1 or BRCA 2 mutation or deleterious BRCA 1 rearrangement is required.
  • Ability to understand and the willingness to sign a written informed consent document.


  • Patients who have had prior BMN 673 (talazoparib) therapy.
  • Patients with known brain metastases diagnosed within 1 year will be excluded from this clinical trial because of their poor prognosis and because they often develop progressive neurologic dysfunction that would confound the evaluation of neurologic and other adverse events. Exception: patients with brain metastases diagnosed greater than 1 year prior to study entry may be considered if they received sterilizing therapy to the central nervous system (CNS) (resection or radiation) and have been CNS progression-free for the 1-year period.
  • Lack of recovery of prior cancer therapy-related adverse events to Grade less than or equal to 1 (National Cancer Institute (NCI) Common Terminology Criteria in Adverse Events (CTCAE) v4.03; except alopecia). Stable persistent grade 2 peripheral neuropathy may be allowed as determined on a case-by-case basis at the discretion of the PI. Patients with platinum-related grade 2 or greater hypomagnesemia (on replacement) will be eligible.
  • Uncontrolled intercurrent illness including, but not limited to, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, clinically significant gastrointestinal (GI) bleeding or hemoptysis within 28 days prior to the start of the study, or psychiatric illness/social situations that would limit compliance with study requirements.
  • Patients with active infection will not be eligible, but may become eligible once infection has resolved and they are at least 7 days from completion of antibiotics.
  • Another previous or current invasive malignancy within the last 2 years, with the exception of curatively treated stage Ia cervical carcinoma, or resected stage Ia endometrial cancer, and noninvasive nonmelanoma skin cancers.
  • Human immunodeficiency virus (HIV)- positive patients on combination antiretroviral therapy are ineligible because of the potential for pharmacokinetic interactions with BMN 673 (talazoparib). HIV- positive patients who are not on combination antiretroviral therapy (cART) and have cluster of differentiation 4 (CD4) counts > 500 are eligible.
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to BMN 673 (talazoparib)

Patients who are receiving any other investigational or commercial agents with the intent to treat the malignancy.

  • Patients with gastrointestinal conditions that might predispose for drug intolerability or poor drug absorption.
  • Use of nasogastric or gastric (G)-tube administration.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02326844

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United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Cancer Institute (NCI)
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Principal Investigator: Jung-Min Lee, M.D. National Cancer Institute (NCI)
  Study Documents (Full-Text)

Documents provided by Jung-Min Lee, M.D., National Institutes of Health Clinical Center (CC):

Additional Information:
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Responsible Party: Jung-Min Lee, M.D., Principal Investigator, National Institutes of Health Clinical Center (CC) Identifier: NCT02326844     History of Changes
Other Study ID Numbers: 150050
First Posted: December 30, 2014    Key Record Dates
Results First Posted: May 24, 2017
Last Update Posted: August 27, 2018
Last Verified: July 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Jung-Min Lee, M.D., National Institutes of Health Clinical Center (CC):
Germline BRCA1/2 Mutations (gBRCAm)
DNA Damaging Agents
FOX03a, 53BP1 and RAD51
Additional relevant MeSH terms:
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Ovarian Neoplasms
Endocrine Gland Neoplasms
Neoplasms by Site
Genital Neoplasms, Female
Urogenital Neoplasms
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Carcinoma, Ovarian Epithelial
Ovarian Diseases
Adnexal Diseases
Genital Diseases, Female
Endocrine System Diseases
Gonadal Disorders
Poly(ADP-ribose) Polymerase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents