1999; Banchereau, Briere et al. 2000; Akbari, DeKruyff et al. 2001). Recent studies in animal models have shown that immuniza tion with DCs loaded with defined tumor antigens in the form of peptides, proteins, or RNA are capable of priming CTL responses and inducing tumor immunity (Flamand, Sornasse et al. 1994; Mayordomo, Zorina et al.