Trial of Active Immunotherapy With Globo H-KLH (OPT-822) in Metastatic Breast Cancer Subjects

Inclusion Criteria: * Female subjects ≥ 21 years of age with histological or cytological diagnosis of breast carcinoma. * Subjects with metastatic breast cancer who have achieved stable disease (SD), partial response (PR), or complete response (CR) after at least 1 regimen of anticancer therapy (i.e. chemotherapy or target therapy, either alone or in any combination). Involvement of supraclavicular lymph node is considered metastasis. * Subjects must have recovered from toxicities of prior therapies. (i.e. CTCAE ≤ grade 2). * Performance status: ECOG ≤ 1 and life expectancy ≥ 3 months. * Organ Function Requirements - Subjects must have adequate organ functions as defined below: * AST/ALT ≤ 3X ULN (upper limit of normal) * AST/ALT ≤ 5X ULN \[with underlying Liver Metastasis\] * Total Bilirubin ≤ 2.0 X ULN * Serum Creatinine ≤ 1.5X ULN * ANC ≥ 1500 /μL * Platelets \> 100,000/μL * No Symptomatic Congestive Heart Failure (Ejection Fraction EF ≥ 50%) * Ability to understand and the willingness to sign a written informed consent document according to institutional guidelines. * All positive or negative ER (estrogen receptor), PR (progesterone receptor), and HER-2 subjects are eligible for this study. * However, subjects who are HER-2 positive and responsive to anti-HER-2 therapy (e.g. Herceptin), are encouraged to remain on anti-HER-2 therapy and not enroll in this trial. * Subjects who desire to enroll in this study and for whom anti-HER-2 therapy is not available or contraindicated, may be eligible to enroll in this trial. * In countries where continuous anti-HER2 therapy is considered standard of care for HER-2 positive metastatic disease, HER-2 positive subjects are not eligible. * Women of childbearing potential must be willing to implement adequate contraception during the study. An adequate method of contraception will be at the investigator's discretion. Exclusion Criteria: * Subjects are pregnant or breast-feeding at entry. * Subjects with more than 2 events of disease progression after the development of metastatic breast cancer. * Subjects who are currently receiving any other concomitant anticancer therapy with the EXCEPTION of bisphosphonates and hormone therapy. * During the study period, subjects using hormonal therapy and bisphosphonates should maintain a constant dose and should not change existing regimen. * However, if a change in hormonal therapy is indicated, e.g. due to intolerable adverse effects, the regimen may be modified but change should be minimized thereafter. * Subjects with metastasis limited to the bone only are excluded. However, subjects with current metastasis limited to the bone only and with a history of distant metastasis are eligible. Subjects with current metastasis limited to the bone only and with current breast tissue lesion are eligible. * Subjects who have any history of other malignancy (except non-melanoma skin carcinoma and carcinoma-in-situ of the uterine cervix) within 5 years of study entry. * Subjects with splenectomy. * Subjects with HIV infection. * Subjects with any major autoimmune diseases or autoimmune disorders requiring systemic iv/oral steroids or immunosuppressive or immunomodulatory therapies. * e.g. Type 1 juvenile onset diabetes mellitus, antibody positive for rheumatoid arthritis, Grave's disease, Hashimoto's thyroiditis, lupus, scleroderma, systemic vasculitis, hemolytic anemia, immune mediated thrombocytopenia, etc * Autoimmune disorders confined to the skin (e.g. psoriasis) are eligible, and topical steroids are allowed for the treatment of such skin disorders. * Subjects with any known uncontrolled inter-current illness including ongoing or active infections, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. * Subjects with any of the following MEDICATIONS within 4 weeks prior to randomization: * Anti-neoplastic agents * Immunotherapy \[mAbs, Interferons, Cytokines (except GCSF)\] * Immunosuppressants (e.g. Cyclosporin, Rapamycin, Tacrolimus, Rituximab, Alemtuzumab, Natalizumab, etc.). * Another investigational drug * Subjects with pleural effusions and/or ascites, due to malignancy, requiring paracentesis every 2 weeks or more frequently. * Subjects with any known severe allergies (e.g. anaphylaxis) to any active or inactive ingredients in the study drugs. * Subjects with bladder inflammation and urinary outflow obstruction.