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

This is a randomized, multi-center, single dose, double-blind, placebo controlled phase III study of the efficacy and safety of once-per-cycle of F-627 in women with stage II-IV breast cancer who are receiving myelotoxic TA chemotherapy treatment (Taxotere (docetaxel) + Adriamycin(doxorubicin)). F-627 is designed to treat neutropenia, an abnormally low number of neutrophils (a type of white blood cell) in the blood. Neutropenia is often seen in cancer patients receiving myelotoxic chemotherapy. The primary objective of this study is to evaluate the efficacy and safety of single fixed dose of F-627 in breast cancer patients experiencing myelotoxic chemotherapy in comparison to placebo. F-627 or placebo is to be administered subcutaneously 24 hours after chemotherapy in each 21-day cycle of chemotherapy treatment (up to 4 cycles). Patients randomized to placebo arm will receive F-627 except in cycle 1. 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.