Neulasta-controlled Trial of F-627 in Women With Breast Cancer Receiving Myelotoxic Chemotherapy

This is a Phase III, global, two arm, open label clinical study will randomize approximately 400 female subjects (approximately 200 per arm) with Stage I - III invasive breast cancer who are to receive neoadjuvant or adjuvant myelotoxic TC chemotherapy treatment (docetaxel + cyclophosphamide, 75 and 600 mg/m2, respectively). Subjects in this study will be those who are scheduled to undergo at least four 21-day cycles of chemotherapy treatment. Subjects may be scheduled for more than 4 cycles of chemotherapy; however, study participation will be limited to a subject's first 4 cycles. The primary objective of this study will be to evaluate the efficacy of F-627 given as a single fixed dose (20 mg) pre-filled syringe as compared to Neulasta® standard dosing (6 mg) in the first chemotherapy cycle. The primary endpoint will be the duration of grade 4 (severe) neutropenia - the number of days in which the patient has had an absolute neutrophil count (ANC \<0.5 x 10\^9/L) observed in chemotherapy cycle 1. Approximately 24 hours after chemotherapy completion in each cycle (Day 2 of the cycle), subjects will receive one of the following treatments: Arm 1: F-627, 20 mg fixed dose pre-filled syringe, administered on Day 2 of each of 4 chemotherapy cycles. Arm 2: 6 mg fixed dose Neulasta®, administered on Day 2 of each of 4 chemotherapy cycles Randomization will occur in an equal ratio (1:1) using a central randomization system (IWRS) on Day 1 of the study, the day of chemotherapy administration for the first chemotherapy cycle. This study is open-label, however, study drug injections are to be administered separately by qualified study personnel to allow study investigators to remain blinded and perform study assessments without knowledge of treatment assignment.