title: MART-1 adenovirus-transduced dendritic cell immunization in a murine model of metastatic central nervous system tumor.
abstract: Dendritic cells (DCs) are potent antigen-presenting cells that have been shown to play a critical role in the initiation of host immune responses against tumor antigens. In this study, a recombinant adenovirus vector encoding the melanoma-associated antigen, MART-1, was used to transduce murine DCs, which were then tested for their ability to activate cytotoxic T lymphocytes (CTLs) and induce protective immunity against B16 melanoma tumor cells implanted intracranially. Genetic modifications of murine bone marrow-derived DCs to express MART-1 was achieved through the use of an E1-deficient, recombinant adenovirus vector. Sixty-two C57BL/6 mice were immunized subcutaneously with AdVMART-1-transduced DCs (n = 23), untransduced DCs (n = 17), or sterile saline (n = 22). Using the B16 murine melanoma, which naturally expresses the MART-1 antigen, all the mice were then challenged intracranially with viable, unmodified syngeneic B16 tumor cells 7 days later. Splenocytes from representative animals in each group were harvested for standard cytotoxicity (CTL) and enzyme-linked immunospot (ELISPOT) assays. The remaining mice were followed for survival. Immunization of C57BL/6 mice with DCs transduced with an adenoviral vector encoding the MART-1 antigen elicited the development of antigen-specific CTL responses. As evidenced by a prolonged survival curve when compared to control-immunized mice with intracranial B16 tumors, AdMART-1-DC vaccination was able to elicit partial protection against central nervous system tumor challenge in vivo.
authors.affiliation: Division of Neurosurgery and the Jonsson Comprehensive Cancer Center, University of California at Los Angeles School of Medicine, Los Angeles, CA 90095-6901, USA.
authors.forename: Howard
authors.initials: H
authors.lastname: Broder
authors.forename: Andrea
authors.initials: A
authors.lastname: Anderson
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Kremen
authors.forename: Sylvia K
authors.initials: SK
authors.lastname: Odesa
authors.forename: Linda M
authors.initials: LM
authors.lastname: Liau
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D000951:Antigens, Neoplasm; D001932:Brain Neoplasms / Q000276:immunology* / Q000473:pathology / Q000556:secondary*; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000276:immunology*; D005260:Female; D005822:Genetic Vectors; D007114:Immunization; D058965:MART-1 Antigen; D051379:Mice; D008810:Mice, Inbred C57BL; D009363:Neoplasm Proteins / Q000235:genetics* / Q000276:immunology*; D013154:Spleen / Q000166:cytology / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014161:Transduction, Genetic
chemical_list: D000951:Antigens, Neoplasm; D016207:Cytokines; D058965:MART-1 Antigen; C548668:Mlana protein, mouse; D009363:Neoplasm Proteins