Abstract:
The present invention concerns a method for treating triple-negative breast cancer (TNBC) in an individual, and/or for inducing an immune response to HER2/neu in an individual with a triple-negative breast cancer expressing low levels of HER2/neu, the method comprising administering to the individual: (a) an effective amount of trastuzumab, or derivative thereof; and (b) an effective amount of nelipepimut-S, or variant thereof, optionally with an immunological adjuvant. Preferably, the method includes a preparatory or priming phase comprising a frequency and duration of trastuzumab or trastuzumab derivative administration sufficient to substantially increase the major histocompatibility complex (MHC)-mediated presentation of HER2 peptide fragments to the patient immune system. The invention also includes medicaments and kits for treating TNBC in an individual, and/or for inducing an immune response to HER2/neu in an individual with a TNBC expressing HER2/neu.