A Pharmacokinetics/Dynamics Ib Study of F-627 in Women With Breast Cancer Receiving Myelotoxic Chemotherapy

F-627 at 240 μg/kg dose enrolling 6 patients with breast cancer receiving adjuvant chemotherapy. Subjects will receive a corresponding dose of F-627 by subcutaneous injection 24 hours after each cycle（21 days） of chemotherapy drug administration. Blood samples are then collected at multiple time points during follow-up visits to evaluate the pharmacokinetics, pharmacodynamics, and safety of the drug. Dose will remain unchanged throughout the treatment period. Eligible subjects will be enrolled sequentially into the 240 μg/kg arm. And the arm should contain 6 evaluable subjects.

F-627 at 320 μg/kg dose enrolling 6 patients with breast cancer receiving adjuvant chemotherapy. Subjects will receive a corresponding dose of F-627 by subcutaneous injection 24 hours after each cycle（21 days） of chemotherapy drug administration. Blood samples are then collected at multiple time points during follow-up visits to evaluate the pharmacokinetics, pharmacodynamics, and safety of the drug. Dose will remain unchanged throughout the treatment period. Eligible subjects will be enrolled sequentially into the 320 μg/kg arm. The arm should contain 6 evaluable subjects.