Generation of cytotoxic responses in mice and human individuals against hematological malignancies using survivin-RNA-transfected dendritic cells

Abstract

Survivin is a member of the inhibitors of apoptosis family and is overexpressed in many types of human cancers, making it an attractive target for T cell-based immunotherapeutic strategies. Recently, HLA-A2-binding peptides derived from the survivin protein were identified as capable of inducing specific T cell responses in cancer patients. Here we demonstrate that human survivin-specific CTLs generated from PBMC by stimulation with autologous dendritic cells transfected with survivin-RNA were cytotoxic for a range of hemopoietic malignant cell lines and primary tumor cells isolated from patients with acute myeloid leukemia. We also show that vaccination of mice with survivin-RNA-transfected dendritic cells leads to long term resistance to challenge by a survivin-expressing lymphoma, demonstrating the potential of survivin as a tumor rejection Ag. Our data provide evidence for the use of survivin as a target structure for immunotherapeutic strategies against hematological neoplasms.