Effect of Mature Dendritic Cells Primed with Autologous Tumor Antigens from Patients with Epithelial Ovarian Cancer on Stimulation of the Cytotoxic Immune Response in Culture of Mononuclear Cells

For modulation of antitumor cytotoxic activity of mononuclear cells in vitro , autologous dendritic cells loaded with tumor lysate antigens were cultured with peripheral blood mononuclear cells from patients with epithelial ovarian cancer in the presence or absence of IL-12 and IL-18. The efficiency of modulation was evaluated by cytotoxic activity of mononuclear cells against autologous tumor cells, by the production of IFN-γ, IL-4, and by the count of perforin-containing lymphocytes. It was demonstrated that dendritic cells stimulated cytotoxic immune response in mononuclear cell culture. Maximum induction of cytotoxic activity of mononuclear cells was attained in case of dendritic cells combination with IL-12 and IL-18 (increased death of autologous tumor cells, accumulation of perforin-positive lymphocytes, enhanced production of IFN-γ).