Very small size proteoliposomes derived from Neisseria meningitidis: An effective adjuvant for antigen-specific cytotoxic T lymphocyte response stimulation under leukopenic conditions

► VSSP protects antigen-specific CTL response in cyclophosphamide-receiving mice. ► VSSP recovers CTL-promoting capacity of P(I:C) under leukopenic conditions. ► VSSP enhances recovery of dendritic cells and memory T cells in leukopenic mice. ► Myeloid-derived suppressor cell functionality is dampened in mice treated with VSSP.