Carboplatin +/- Nivolumab in Metastatic Triple Negative Breast Cancer

Breast Cancer Clinical Trial

Official title:

A Randomized Phase II Trial of Carboplatin With or Without Nivolumab in First-line Metastatic Triple-negative Breast Cancer

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT03414684
• Other study ID #: 17-512
• Secondary ID: CA209-9JX
• Status: Active, not recruiting
• Phase: Phase 2
• Start date: January 30, 2018
• Est. completion date: June 30, 2025

Study information

• Verified date: January 2024
• Source: Dana-Farber Cancer Institute
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This research study is studying a drug called Carboplatin with or without another study drug, Nivolumab as a possible treatment for triple-negative breast cancer that has spread to other parts of the body.

The interventions involved in this study are:

• Carboplatin

• Nivolumab

Description:

This research study is a Phase II clinical trial. Phase II clinical trials test the safety and effectiveness of an investigational intervention to learn whether the intervention works in treating a specific disease. "Investigational" means that the intervention is being studied.

The FDA (the U.S. Food and Drug Administration) has not approved nivolumab for your specific disease but it has been approved for other uses. The FDA has approved carboplatin as a treatment option for your disease.

The purpose of this research study is to determine how well carboplatin, by itself, or together with nivolumab, works in treating breast cancer that has spread to other parts of the body. Nivolumab is a recently discovered human monoclonal antibody. An antibody is a type of protein that your immune system (the system that defends your body against potentially harmful particles) uses to find and destroy foreign molecules (particles not typically found in your body, such as bacteria and viruses). Scientists can now make antibodies in the laboratory and produce them for the treatment of many different diseases.

Nivolumab works by attaching to and blocking a molecule called PD-1. PD-1 is a different molecule that can turn off the immune system by interacting with PD-L1 on the cancer cell. Nivolumab has been shown in research studies to prevent PD-1 from shutting down the immune system, thus allowing it to recognize and help your body destroy the cancer cells. You are being asked to participate in this study because triple-negative breast cancer has shown elevated rates of PD-L1 expression.

Nivolumab has been used in other research studies and information from those research studies suggests that nivolumab may help shrink or stabilize your triple negative breast cancer in this study

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 78
• Est. completion date: June 30, 2025
• Est. primary completion date: September 28, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Participants must have histologically or cytologically confirmed invasive breast cancer, with unresectable locally advanced or metastatic disease. Participants without pathologic or cytologic confirmation of metastatic disease should have unequivocal evidence of metastasis from physical examination or radiologic evaluation.

• Estrogen-receptor and progesterone-receptor expression both = 1% by immunohistochemistry (IHC), and HER2-negative status as determined by the current ASCO/CAP guidelines. If a patient has more than one histological result, the most recent sample will be considered for inclusion.

• Participants must have PD-L1 status available at the time of registration. Standard local testing with any PD-L1 antibody that has been validated in a CLIA-certified environment will be acceptable for including patients on trial.. Primary or metastatic samples may be tested for PD-L1 status.

• Participants must have measurable or evaluable disease by RECIST version 1.1.

• Participants must agree to undergo a research biopsy, if tumor is safely accessible, at baseline. Previously collected archival tissue will also be obtained on all participants. For participants for whom newly-obtained samples cannot be provided (e.g. inaccessible or participant safety concern) the archival tissue alone will be acceptable. Tissue needs to be located and availability confirmed at time of registration (See Section 9 for more details). Participants must agree to a mandatory repeat biopsy 3-6 weeks after starting treatment, if tumor is safely accessible. For patients randomized to carboplatin alone who decide to crossover to nivolumab and nab-paclitaxel at time of progression, a mandatory biopsy will be required if tumor is safely accessible prior to initiating crossover treatment; participants must also agree to undergo this biopsy, if applicable.

• Prior chemotherapy: Participants must have received 0 prior chemotherapeutic regimens for metastatic breast cancer. Prior platinum in the neo/adjuvant setting is permissible, if at least 6 months elapsed since the end of adjuvant systemic therapy to the development of metastatic disease. All toxicities related to prior chemotherapy must have resolved to CTCAE v4.0 grade 1 or lower, unless otherwise specified.

• Prior biologic therapy: Prior poly-ADP ribose polymerase (PARP) inhibitors are not allowed in the metastatic setting. Prior PARP inhibitors in the neo/adjuvant setting are permissible, if at least 6 months elapsed since the end of adjuvant systemic therapy to the development of metastatic disease. All toxicities related to prior biologic therapy must have resolved to CTCAE v4.0 grade 1 or lower, unless otherwise specified.

• Prior radiation therapy: Patients may have received prior radiation therapy. Radiation therapy must be completed at least 14 days prior to registration, and all toxicities related to prior radiation therapy must have resolved to CTCAE v4.0 grade 1 or lower, unless otherwise specified in 3.1.10. Patients may not have had >25% of their bone marrow radiated.

• The subject is =18 years old.

• ECOG performance status =1 (Karnofsky >60%, see Appendix A).

• Participants must have normal organ and marrow function as defined below:

• Absolute neutrophil count =1,500/mcL

• Platelets =100,000/mcL

• Hemoglobin = 9.0 g/dl

• Total bilirubin =1.5 × institutional upper limit of normal (ULN) (or =2.0 x ULN in patients with documented Gilbert's Syndrome)

• AST(SGOT)/ALT(SGPT) =2.5 × institutional ULN or

=5 × institutional ULN for participants with documented liver metastases

• Serum creatinine =1.5 × institutional ULN OR creatinine clearance = 45 mL/min/ 1.73m2 for participants with creatinine levels above institutional ULN.

• Supportive care (e.g. transfusion of red blood cells) is allowed to meet eligibility criteria.

• Female subjects of childbearing potential must have a negative serum or urine pregnancy test within 2 weeks prior to registration.

• Childbearing potential is defined as: participants who have not reached a postmenopausal state (= 12 continuous months of amenorrhea with no identified cause other than menopause) and have not undergone surgical sterilization (removal of ovaries and/or uterus).

• Women of childbearing potential (WOCBP) must agree to use an adequate method of contraception. Contraception is required starting with the first dose of study medication through 150 days (5 months) after the last dose of study medication. Examples of contraceptive methods with a failure rate of < 1% per year include bilateral tubal ligation, male sterilization, established and proper use of hormonal contraceptives that inhibit ovulation, hormone-releasing intrauterine devices, and copper intrauterine devices. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or postovulation methods) and withdrawal are not acceptable methods of contraception.

• Males who are sexually active with WOCBP must agree to follow instructions for method(s) of contraception for the duration of study treatment with nivolumab and 7 months after the last dose of study treatment (i.e., 90 days (duration of sperm turnover) plus the time required for the investigational drug to undergo approximately five half-lives.)

• Participants on bisphosphonates or RANK ligand inhibitors may continue receiving therapy during study treatment.

• The participant must be capable of understanding and complying with the protocol and willing to sign a written informed consent document

Exclusion Criteria:

• Concurrent administration of any other anti-cancer therapy during the course of this study (bisphosphonates and RANK ligand inhibitors are allowed).

• Prior hypersensitivity to platinum chemotherapy or to any of the excipients of platinum or nivolumab therapy.

• Prior therapy with an anti-PD-1, anti-PD-L1, anti-PD-L2, anti-CD137, or anti-Cytotoxic T-lymphocyte-associated antigen-4 (CTLA-4) antibody (including pembrolizumab, ipilimumab, and any other antibody or drug specifically targeting T-cell co-stimulation or checkpoint pathways).

• Known brain metastases that are untreated, symptomatic, or require therapy to control symptoms. Participants with a history of treated central nervous system (CNS) metastases are eligible. Treated brain metastases are defined as those without ongoing requirement for corticosteroids, as ascertained by clinical examination and brain imaging (magnetic resonance imaging or CT scan) completed during screening. Any corticosteroid use for brain metastases must have been discontinued without the subsequent appearance of symptoms for =7 days prior to registration. Treatment for brain metastases may include whole brain radiotherapy, radiosurgery, surgery or a combination as deemed appropriate by the treating physician. Radiation therapy must be completed at least 7 days prior to registration

• Major surgery within 2 weeks prior to registration. Patients must have recovered from any effects of any major surgery.

• Uncontrolled, significant intercurrent or recent illness including, but not limited to, ongoing or active infection, uncontrolled non-malignant systemic disease, uncontrolled seizures, or psychiatric illness/social situation that would limit compliance with study requirements in the opinion of the treating investigator.

• Participant has a medical condition that requires chronic systemic steroid therapy (> 10 mg of prednisone daily or equivalent) or any other form of immunosuppressive medication (including disease modifying agents) and has required such therapy in the last 2 years. Replacement therapy (eg., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic therapy.

• Participant has documented history of autoimmune disease or syndrome that currently requires systemic steroids or immunosuppressive agents.

• History or evidence of active, non-infectious pneumonitis or interstitial lung disease.

• Individuals with a history of a second malignancy are ineligible except for the following circumstances. Individuals with a history of other malignancies are eligible if they have been disease-free for at least 3 years or are deemed by the investigator to be at low risk for recurrence of that malignancy. Individuals with the following cancers that have been diagnosed and treated within the past 3 years are eligible: cervical/prostate carcinoma in situ, superficial bladder cancer, non-melanoma cancer of the skin. Patients with other cancers diagnosed within the past 3 years and felt to be at low risk of recurrence should be discussed with the study sponsor to determine eligibility.

• Participant is known to be positive for the human immunodeficiency virus (HIV), HepBsAg, or HCV RNA. HIV-positive participants are ineligible because of the potential for pharmacokinetic interactions of combination antiretroviral therapy with study drugs. In addition, these participants are at increased risk of fatal infections when treated with marrow-suppressive therapy.

• The participant has received a live vaccine within 28 days prior to registration. Examples of live vaccines include, but are not limited to, the following: measles, mumps, rubella, varicella/zoster, yellow fever, rabies, BCG, and typhoid vaccine. The use of the inactivated seasonal influenza vaccine is allowed.

• Women who are pregnant or breastfeeding or adults of reproductive potential not employing an adequate method of contraception.

• Childbearing potential is defined as: participants who have not reached a postmenopausal state (= 12 continuous months of amenorrhea with no identified cause other than menopause) and have not undergone surgical sterilization (removal of ovaries and/or uterus)

Related Conditions & MeSH terms

• Breast Cancer
• Breast Neoplasms
• Triple Negative Breast Neoplasms

Intervention

Drug:
• Carboplatin
Carboplatin interferes with the development of the genetic material in a cell, which will cause the cancer cells to die.
• Nivolumab
Nivolumab works by attaching to and blocking a molecule called PD-1. PD-1 is a different molecule that can turn off the immune system by interacting with PD-L1 on the cancer cells

Locations

Country	Name	City	State
United States	Eastern Maine Medical Center	Bangor	Maine
United States	Beth Israel Deaconess Medical Center	Boston	Massachusetts
United States	Dana-Farber Cancer Institute	Boston	Massachusetts
United States	St. Elizabeth's Medical Center	Boston	Massachusetts
United States	University of Vermont Medical Center	Burlington	Vermont
United States	Ohio State University	Columbus	Ohio
United States	Dana-Farber/New Hampshire Oncology-Hematology	Londonderry	New Hampshire
United States	Dana-Farber/Brigham and Women's Cancer Center at Milford Regional Medical Center	Milford	Massachusetts
United States	Dana-Farber/Brigham and Women's Cancer Center in clinical affiliation with South Shore Hospital	South Weymouth	Massachusetts
United States	The Stamford Hospital	Stamford	Connecticut

Sponsors (2)

Lead Sponsor	Collaborator
Dana-Farber Cancer Institute	Bristol-Myers Squibb

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Progression-free Survival	Defined as the time from randomization to the earlier of progression or death due to any cause. Participants alive without disease progression are censored at date of last disease evaluation	Assessed from date of randomization until the date of first documented progression or date of death from any cause, whichever came first, up to 3.5 years
Secondary	Objective Response Rate by Response Evaluation Criteria in Solid Tumours (RECIST) 1.1	Defined as the percentage of patients achieving a complete response (complete disappearance of all target and non-target lesions; no new lesions) or partial response (at least 30% decrease in the sum of the diameters of target lesions; persistence of one or more non-target lesion(s) and/or maintenance of tumor marker level above the normal limits [i.e., "non-CR/non-PD" in non-target lesions]; and no new lesions) based on RECIST 1.1	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Objective Response Rate by Immune-Related Response Criteria (irRC)	Defined as the proportion of patients achieving an immune-related complete response (complete disappearance of all target and non-target lesions; no new measurable/unmeasurable lesions) or immune-related partial response (a decrease of the immune-related sum of product diameters [irSPD] of 50% or greater) based on irRC	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Overall Survival	Defined as the time from randomization to death due to any cause, or censored at date last known alive	Assessed from date of randomization until the date of death from any cause, up to 3.5 years
Secondary	Clinical Benefit Rate	Defined as the proportion of patients achieving a complete response or partial response by RECIST 1.1, or stable disease lasting greater than or equal to 24 weeks	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Duration of Response	Defined as the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented. Patients without events reported are censored at the last disease evaluation.	Assessed from the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) to the time of first progression, up to 2.75 years
Secondary	Time to Objective Response	Defined as the time from randomization to the date of the first documented CR or PR by RECIST 1.1, whichever is first recorded	Assessed from randomization to the time of first response, up to 3.5 years
Secondary	Progression-free Survival Among PD-L1-positive Patients	PFS defined as the time from randomization to the earlier of progression or death due to any cause; participants alive without disease progression are censored at date of last disease evaluation.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from date of randomization until the date of first documented progression or date of death from any cause, whichever came first, up to 3.5 years
Secondary	Objective Response Rate by RECIST 1.1 Among PD-L1-positive Patients	ORR defined as the proportion of patients achieving a complete response (complete disappearance of all target and non-target lesions; no new lesions) or partial response (at least 30% decrease in the sum of the diameters of target lesions; persistence of one or more non-target lesion(s) and/or maintenance of tumor marker level above the normal limits [i.e., "non-CR/non-PD" in non-target lesions]; and no new lesions) based on RECIST 1.1.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Objective Response Rate by irRC Among PD-L1-positive Patients	ORR by irRC defined as the proportion of patients achieving an immune-related complete response (complete disappearance of all target and non-target lesions; no new measurable/unmeasurable lesions) or immune-related partial response (a decrease of the immune-related sum of product diameters [irSPD] of 50% or greater) based on irRC.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Overall Survival Among PD-L1-positive Patients	OS defined as the time from randomization to death due to any cause, or censored at date last known alive.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from date of randomization until the date of death from any cause, up to 3.5 years
Secondary	Clinical Benefit Rate Among PD-L1-positive Patients	CBR defined as the proportion of patients achieving a complete response or partial response by RECIST 1.1, or stable disease lasting greater than or equal to 24 weeks.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Duration of Response Among PD-L1-positive Patients	DOR defined as the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented. Patients without events reported are censored at the last disease evaluation.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) to the time of first progression, up to 2.75 years
Secondary	Time to Objective Response Among PD-L1-positive Patients	TTOR defined as the time from randomization to the date of the first documented CR or PR by RECIST 1.1, whichever is first recorded.; PD-L1 positivity defined as =1% of the tumor cell population demonstrating unequivocal staining for PD-L1.	Assessed from randomization to the time of first response, up to 3.5 years
Secondary	Second-course Progression-free Survival Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	PFS defined as the time from the start of crossover treatment to the earlier of progression (on crossover therapy) or death due to any cause; participants alive without disease progression are censored at date of last disease evaluation.	Assessed from the start of crossover therapy to the date of first documented progression on crossover therapy or the date of death from any cause, whichever came first, up to 2.8 years
Secondary	Second-course Objective Response Rate by RECIST 1.1 Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	ORR defined as the proportion of patients achieving a complete response (complete disappearance of all target and non-target lesions; no new lesions) or partial response (at least 30% decrease in the sum of the diameters of target lesions; persistence of one or more non-target lesion(s) and/or maintenance of tumor marker level above the normal limits [i.e., "non-CR/non-PD" in non-target lesions]; and no new lesions) based on RECIST 1.1., during crossover therapy	Assessed from the start of crossover treatment until disease progression, intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 2.8 years
Secondary	Second-course Objective Response Rate by irRC Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	ORR by irRC defined as the proportion of patients achieving an immune-related complete response (complete disappearance of all target and non-target lesions; no new measurable/unmeasurable lesions) or immune-related partial response (a decrease of the immune-related sum of product diameters [irSPD] of 50% or greater) based on irRC, during second-course therapy	Assessed from the start of crossover treatment until disease progression, intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 2.8 years
Secondary	Second-course Clinical Benefit Rate Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	CBR defined as the proportion of patients achieving a complete response or partial response by RECIST 1.1, or stable disease lasting greater than or equal to 24 weeks, during second course therapy	Assessed from the start of crossover treatment until disease progression, intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 2.8 years
Secondary	Second-course Duration of Response Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	DOR defined as the time measurement criteria are met for second-course CR or PR by RECIST 1.1 (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented thereafter. Patients without events reported are censored at the last disease evaluation.	Assessed from the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) on crossover therapy to the time of first progression on crossover therapy, up to 2.5 years
Secondary	Second-course Time to Objective Response Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	TTOR defined as the time from start of crossover treatment to the date of the first documented CR or PR by RECIST 1.1 on second-course therapy, whichever is first recorded	Assessed from the start of crossover therapy to the time of first response on crossover therapy, up to 2.8 years
Secondary	Second-course Overall Survival Among Patients Who Crossed Over to Nab-paclitaxel Plus Nivolumab	Second-course OS defined as the time from the start of crossover treatment to death due from any cause, or censored at date last known alive.	Assessed from the start of crossover therapy until the date of death from any cause, up to 2.8 years
Secondary	Progression-free Survival Among BRCA-mutant Patients	PFS defined as the time from randomization to the earlier of progression or death due to any cause; participants alive without disease progression are censored at date of last disease evaluation.; BRCA-mutant patients were those having BRCA1 or BRCA2 mutations.	Assessed from date of randomization until the date of first documented progression or date of death from any cause, whichever came first, up to 3.5 years
Secondary	Objective Response Rate by RECIST 1.1 Among BRCA-mutant Patients	ORR defined as the proportion of patients achieving a complete response (complete disappearance of all target and non-target lesions; no new lesions) or partial response (at least 30% decrease in the sum of the diameters of target lesions; persistence of one or more non-target lesion(s) and/or maintenance of tumor marker level above the normal limits [i.e., "non-CR/non-PD" in non-target lesions]; and no new lesions) based on RECIST 1.1.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Objective Response Rate by irRC Among BRCA-mutant Patients	ORR by irRC defined as the proportion of patients achieving an immune-related complete response (complete disappearance of all target and non-target lesions; no new measurable/unmeasurable lesions) or immune-related partial response (a decrease of the immune-related sum of product diameters [irSPD] of 50% or greater) based on irRC.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Overall Survival Among BRCA-mutant Patients	OS defined as the time from randomization to death due to any cause, or censored at date last known alive.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	From date of randomization until the date of death from any cause, assessed up to 3.5 years
Secondary	Clinical Benefit Rate Among BRCA-mutant Patients	CBR defined as the percentage of patients achieving a complete response or partial response by RECIST 1.1, or stable disease lasting greater than or equal to 24 weeks.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	Assessed from the start of treatment until disease progression, complete response (after at least 24 weeks of treatment), intercurrent illness, unacceptable toxicity, noncompliance/withdrawal, or general/specific worsening of condition, up to 3.5 years
Secondary	Duration of Response Among BRCA-mutant Patients	DOR defined as the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented. Patients without events reported are censored at the last disease evaluation.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	Assessed from the time measurement criteria are met for CR or PR by RECIST 1.1 (whichever is first recorded) to the time of first progression, up to 3.5 years
Secondary	Time to Objective Response Among BRCA-mutant Patients	TTOR defined as the time from randomization to the date of the first documented CR or PR by RECIST 1.1, whichever is first recorded.; BRCA-mutant patients were those with BRCA1 or BRCA2 mutations.	Assessed from randomization to the time of first response, up to 3.5 years