Bioequivalence Study of IG-001 Versus Nab-paclitaxel in Metastatic or Locally Recurrent Breast Cancer

This study is designed to compare the pharmacokinetics (PK) of IG-001 and nab-paclitaxel in patients with metastatic or locally recurrent breast cancer. Patients meeting the eligibility criteria will be randomized to determine which drug is administered first. * Patients randomized to Group 1 will receive a single dose of IG-001 (Period 1) followed 3 weeks later by a single dose of nab-paclitaxel (Period 2). * Patients randomized to Group 2 will receive a single dose of nab-paclitaxel (Period 1) followed 3 weeks later by a single dose of IG-001 (Period 2). Blood samples for PK analysis will be taken at specified times before, during, and after the infusion of each drug in Periods 1 and 2. Following successful completion of Period 1 and Period 2, patients may be eligible for up to 4 additional cycles of treatment with IG-001 in the extension study. Safety will be monitored throughout the study.