Abstract
The in vitro generation of dendritic cells (DCs) from either blood or bone marrow has been accomplished for humans and a number of other species. This ability has facilitated the opportunity to test the efficacy of DC vaccines in various tumor models. The cottontail rabbit papillomavirus (CRPV) model is the most clinically relevant animal model for human papillomavirus (HPV)-associated carcinogenesis. The CRPV model has been used to test various preventative and therapeutic vaccination strategies, and the availability of rabbit DCs would further expand its utility. However, to date, rabbit DCs have not been phenotypically and/or functionally characterized. Here we show that DCs can be generated in vitro from rabbit bone marrow mononuclear cells (BMMCs) cultured in the presence of the human cytokines GM-CSF and IL-4 and matured with lipopolysaccharide (LPS). These cells show upregulation of MHC class II and CD86, as well as downregulation of CD14, do not have non-specific esterase activity, are able to perform receptor-mediated endocytosis, and are potent stimulators of allogeneic T cell proliferation in mixed lymphocyte reactions. The ability to generate rabbit DCs makes it possible to test the efficacy of DC vaccination in the prevention and treatment of CRPV-induced lesions, which may provide useful preclinical data regarding the use of DC vaccines for HPV-associated lesions, including cervical cancer.
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