the present invention includes compositions and methods for treating a breast cancer cell , a metastatic breast cancer cell , or a triple negative breast cancer cell comprising : identifying a subject in need for treatment for a breast cancer cell , a metastatic breast cancer cell , or a triple negative breast cancer cell ; and administering a therapeutically effective amount of a formulation that leads to the presentation of an immunogenic sp17 protein or peptide antigen on an antigen presenting cell to activate t cells that are sp17 - specific t cells , wherein the sp17 - specific t cells impair the growth of the breast cancer cell , the metastatic breast cancer cell , or the triple negative breast cancer cell growth .