A Phase 3, Multi-Center Study of Gemcitabine/Carboplatin, With or Without BSI-201, in Patients With ER-, PR-, and Her2-Negative Metastatic Breast Cancer

\- Histologically documented breast cancer (either primary or metastatic site) that is ER-negative, PR-negative, and HER2 non-overexpressing by immunohistochemistry (0, 1) or fluorescence in situ hybridization (FISH).

Triple-negative tumors were defined by the following criteria:

HER2-non-overexpressing: FISH-negative (defined by ratio \<2.2) or, immunohistochemical (IHC) 0, IHC 1+ or, IHC 2+ or IHC 3+ and FISH-negative.

ER- and PR-negative: \<10% tumor staining by immunohistochemistry (IHC).

* Never having received chemotherapy for metastatic disease or, having received 1 or 2 prior chemotherapy regimens in the metastatic setting (Prior adjuvant/neoadjuvant therapy was allowed);

* Metastatic breast cancer (Stage IV) with measurable disease by RECIST 1.1 criteria;

* Female, ≥18 years of age;

* Eastern Cooperative Oncology Group (ECOG) performance status of 0-1;

* Organ and marrow function as follows: absolute neutrophil count (ANC) ≥1500/mm3, platelets ≥100,000/dL, hemoglobin ≥9 g/dL, bilirubin ≤1.5 mg/dL, serum creatinine ≤1.5 mg/dL or creatinine clearance ≥60 mL/min, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤2.5 times the upper limit of normal if no liver involvement or ≤5 times the upper limit of normal with liver involvement;

* Radiation therapy completed at least 14 days before study dosing on day 1; radiated lesions may not have served as measurable disease;

* Central nervous system metastases allowed if subject did not require steroids, whole brain radiation therapy (XRT), gamma/cyber knife, and brain metastases were clinically stable without symptomatic progression;

* For women of child bearing potential, documented negative pregnancy test within two weeks of study entry and agreement to acceptable birth control during the duration of the study therapy;

* Tissue block (primary or metastatic) or readily available fresh frozen tumor tissue for PARP expression and other pharmacogenomic studies recommended (although its absence will not exclude subjects from participating);

* No other diagnosis of malignancy (with exception of non melanoma skin cancer or a malignancy diagnosed ≥5 years ago);

* Obtained informed consent;

* Capability to understand and comply with the protocol and signed informed consent document.

What this study is about