A Phase 2 Study of EZN-2208 in Patients With Metastatic Breast Cancer

Inclusion Criteria:

Histologically confirmed breast adenocarcinoma that is metastatic. Receptor status of the tumor must be known.
Disease progression during or after immediate previous therapy, or intolerable toxicity leading to cessation of immediate previous therapy

Previous treatment for MBC:

AT Cohort: Prior AT required as adjuvant or metastatic therapy; no more than 2 prior chemotherapy regimens for MBC.
ATX Cohort: Prior ATX required as adjuvant or metastatic therapy;no more than 4 prior chemotherapy regimens for MBC.

For patients with positive receptor status:

Patients with HER2+ MBC must have received prior trastuzumab.
Patients with ER+ MBC must have received prior hormone therapy.
Measurable disease by RECIST Version 1.1
Women 18 years or older
ECOG performance status of 0 to 2
Adequate bone marrow, renal and hepatic functions

Exclusion Criteria:

Major surgery within 3 weeks before study start
Known or suspected brain metastases requiring intervention with steroids and/or radiation therapy
Prior chemotherapy, immunotherapy, non-investigational agent, or other therapy used to treat the cancer within 3 weeks before scheduled administration of EZN-2208

History of other primary cancer within 5 years of enrollment, unless

Curatively resected non-melanomatous skin cancer, or
Curatively resected cervical cancer
Lack of recovery to Grade 1 from any reversible side effects related to the administration of an investigational agent, chemotherapy, or other prior treatments for the cancer
Current participation in another clinical study with an investigational agent and/or use of an investigational drug (not including investigational use of an approved drug) in the 30 days before the first administration of EZN-2208
Known chronic infectious disease, such as AIDS