1. Dendritic cell (DC)-derived exosomes (Dexo) are capable of inducing anti-tumor immune responses.2. Dexo effectively induced cytotoxic activity of CD8+ T cells against TC-1 tumor cells.3. Dexo promoted the immune response to in vitro restimulation induced by antigen E7 in inoculated mouse splenocytes. This evidence concerns the gene CD8A and neoplasm.