title: In vitro anti-tumor immune response induced by dendritic cells transfected with recombinant adenovirus carrying mutant K-ras genes.
abstract: The specific anti-tumor immune response induced by mouse bone marrow dendritic cells (DCs) transfected with recombinant adenovirus carrying mutant k-ras genes was investigated. DCs were generated from mouse bone marrow in the presence of rmGM-CSF (3.3 ng/mL) and rmIL-4 (1.3 ng/mL) and detected by FACS, and then transfected with the recombinant adenovirus encoding mutant k-ras gene. The efficacy of transfection and T cell stimulating activity of DCs were detected. CTL activity of the mice vaccinated with DCs was observed. The results showed that DCs had dendritic veiled morphology. BmDCs highly expressed B7-1 (80%), B7-2 (77%), MHC II (70%), CD11c (65%), CD40 (70%) and CD54 (96%) with FACS, and no significant difference in the expression was observed before and after the transfection (P > 0.05). The DCs transfected by mutant k-ras gene could significantly stimulate lymphocytes proliferation as compared with those transfected by Ad-c or non-modified DCs (P < 0.05). DC vaccine transfected by mutant k-ras gene could induce CTL activity against Lewis lung cancer, but not against B16. The specific cytotoxicity against Lewis lung cancer in Ad-k-ras/12-transduced DC group was significantly higher than those in the control, vector and non-transfected DCs groups (P < 0.05). It was concluded that special antitumor response could be induced by DCs transfected with recombinant adenovirus carrying mutant k-ras genes.
authors.affiliation: Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhao
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Zhou
authors.forename: Yanrong
authors.initials: Y
authors.lastname: Lu
authors.forename: Yang
authors.initials: Y
authors.lastname: Qin
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Jinsong
authors.initials: J
authors.lastname: Li
authors.forename: Jianjun
authors.initials: J
authors.lastname: Wang
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D019496:Cancer Vaccines / Q000276:immunology*; D003713:Dendritic Cells / Q000276:immunology*; D011905:Genes, ras / Q000235:genetics*; D005822:Genetic Vectors / Q000235:genetics; D008175:Lung Neoplasms / Q000276:immunology* / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D009154:Mutation; D011995:Recombination, Genetic / Q000235:genetics; D014162:Transfection; D014407:Tumor Cells, Cultured; D019444:Vaccines, DNA / Q000276:immunology
chemical_list: D019496:Cancer Vaccines; D019444:Vaccines, DNA