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A cancer vaccine comprised of nine class I major histocompatibility complex (MHC)-restricted breast cancer associated peptides, the tetanus toxoid helper peptide and the Toll-like receptor 3 (TLR3) agonist poly ICLC, with potential immunostimulatory and antineoplastic activities. The nine peptides derived from six cancer associated proteins are epidermal growth factor receptor 2 (HER2/neu), carcinoembryonic antigen (CEA) and four cancer/testis antigens (CTAs: MAGE-A1, -A3, -A10, and NY-ESO-1). Vaccination with this vaccine may elicit a specific cytotoxic T-lymphocyte (CTL) response against cells overexpressing these tumor associated antigens TAAs). As a nonspecific T-helper epitope, tetanus toxoid helper peptide binds to class II MHC and results in long-term immunopotentiation by increasing the helper T-cell response. Poly ICLC, the double-stranded RNA molecules of polyinosinic-polycytidylic acid stabilized with poly L-lysine in carboxymethylcellulose, binds to TLR3 and induces the release of cytokines which may help boost the immune response against the TAAs. Check for active clinical trials using this agent. (NCI Thesaurus)