Figure 1From: Immune approaches to the treatment of breast cancer, around the corner?Immune system functions and components relevant to breast cancer therapy. CTLA-4, cytotoxic T lymphocyte-associated antigen 4; MHC, major histocompatibility complex; NK, natural killer; PD-1, programmed death-1; PDL-1, PD-1 ligand 1; TAA, tumor-associated antigen; TCR, T-cell receptor; Treg, regulatory T.Back to article page