HumanaH - Hu3s193 in the Treatment of Advanced Breast Cancer After Hormonal Therapy

This is a national study, open label, single arm, phase II study which will be conducted in seven centers in Brazil. The study will be coordinated by the INSTITUTO DO CÂNCER DO ESTADO DE SÃO PAULO in collaboration with RECEPTA Biopharma. The study is funded by the CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO (CNPq). Before any procedure relating to the study, patients must read and sign the informed consent (IC). The inclusion of patients begin immediately after regulatory approval and is expected to end after reaching the number of patients. The follow-up term will last at least 24 months for each patient included, unless limited by death, loss to follow up or withdrawal of informed consent. A total of 60 patients will be recruited in this study. The eligible patients must be 18 or older, confirmed diagnosis of breast cancer with locally advanced or metastatic progression after one or two lines of previous hormone treatment, confirmation of Lewis antigen expression -as assessed by central laboratory, measurable or evaluable disease and adequate organ function. Patients will receive weekly intravenous doses of the antibody Hu3S193 until disease progression, unacceptable toxicity, withdrawal of consent or the investigator's decision, whichever occurs first. The study's primary endpoint is the clinical benefit rate.