Trial of Eribulin Followed by Doxorubicin & Cyclophosphamide for Her2-negative, Locally Advanced Breast Cancer

This is a phase 2, single-arm, open label study. Patients with Her2-negative, locally advanced breast cancer will be enrolled on the study prior to receiving neoadjuvant chemotherapy. Patients will receive 4 cycles of neoadjuvant eribulin followed by 4 cycles of dose-dense doxorubicin and cyclophosphamide (AC). All patients will have a baseline biopsy prior to study entry to determine eligibility. Patients will undergo repeat breast imaging and optional biopsy after completing 4 cycles of eribulin. Patients will then receive 4 cycles of dose-dense AC. Patients will undergo repeat breast imaging followed by surgical resection within 30 days of completing last cycle of chemotherapy. Patients who are not surgical candidates after completion of chemotherapy will be asked to undergo optional repeat biopsy prior to receiving additional treatment at the discretion of the investigator. Patients will continue to be followed per standard practice guideline after surgery Clinical response will be determined by clinical breast examination prior to each cycle of chemotherapy and by breast imaging performed at baseline, after completion of eribulin, and prior to surgery. Pathologic complete response (pCR) will be determined at the time of surgical resection. Correlative biomarker studies will be performed on tumor samples at the completion of the clinical trial.