title: Autologous neu DNA vaccine can be as effective as xenogenic neu DNA vaccine by altering administration route.
abstract: We examined the therapeutic efficacy of xenogenic human N'-terminal neu DNA vaccine and autologous mouse N'-terminal neu DNA vaccine on MBT-2 tumor cells in C3H mice. Intramuscular injection of xenogenic and autologous neu DNA vaccines produced comparable therapeutic efficacies. Mouse and human N'-neu DNA vaccine induced tumor infiltration of CD8(+) T cells, while the human vaccine was less effective at stimulating natural killer cells. Depletion of CD8(+) T cells abolished the therapeutic efficacy of both types of DNA vaccines. On the other hand, xenogenic neu DNA vaccine showed significantly better therapeutic efficacy than autologous DNA vaccine with gene gun immunization. Increased infiltration of CD8(+) T cells was correlated with enhanced therapeutic efficacy in the human N'-neu group of mice. Therefore, intramuscular injection can enhance the therapeutic efficacy of autologous neu DNA vaccine.
authors.affiliation: Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC.
authors.forename: Cheng-Fen
authors.initials: CF
authors.lastname: Tu
authors.forename: Chi-Chen
authors.initials: CC
authors.lastname: Lin
authors.forename: Ming-Chuan
authors.initials: MC
authors.lastname: Chen
authors.forename: Tai-Ming
authors.initials: TM
authors.lastname: Ko
authors.forename: Chiu-Mei
authors.initials: CM
authors.lastname: Lin
authors.forename: Ying-Chang
authors.initials: YC
authors.lastname: Wang
authors.forename: Ming-Derg
authors.initials: MD
authors.lastname: Lai
mesh_terms: D000818:Animals; D019470:Biolistics; D018414:CD8-Positive T-Lymphocytes / Q000378:metabolism; D019496:Cancer Vaccines / Q000008:administration & dosage* / Q000276:immunology* / Q000627:therapeutic use; D045744:Cell Line, Tumor; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D051379:Mice; D009374:Neoplasms, Experimental / Q000188:drug therapy; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000276:immunology*; D013045:Species Specificity; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy; D019444:Vaccines, DNA / Q000008:administration & dosage* / Q000276:immunology* / Q000627:therapeutic use
chemical_list: D019496:Cancer Vaccines; D007074:Immunoglobulin G; D018719:Erb-b2 Receptor Tyrosine Kinases; D019444:Vaccines, DNA