title: Nasal absorption and biodistribution of plasmid DNA: an alternative route of DNA vaccine delivery.
abstract: Nasal administration is emerging as a new route of DNA vaccine delivery. We aimed to study the extent of absorption and biodistribution of intranasally administered plasmid DNA. After intranasal administration, the level of plasmid DNA in the serum peaked at 1.5 h. The ratio of the area under the concentration (AUC) after intranasal administration of DNA over the AUC after intravenous administration was 0.14. At 15 min post inoculation, the highest organ distribution was observed in the liver and the cervical lymph nodes showed the highest level among the lymph nodes. At 24 h a higher localization of plasmids to the brain than to the lung and spleen was notable. A significant level of mRNA expression was observed in the lymph nodes. These results suggest that plasmid DNA can be substantially absorbed and distributed to the lymph nodes after intranasal administration, partly explaining the systemic immunogenicity of intranasally administered plasmid DNA vaccines.
authors.affiliation: Department of Microbiology and Institute of Medical Research, College of Medicine, Pochon CHA University, 487-800, Kyonggi-do, South Korea. ohyk@hotmail.com
authors.forename: Y K
authors.initials: YK
authors.lastname: Oh
authors.forename: J P
authors.initials: JP
authors.lastname: Kim
authors.forename: T S
authors.initials: TS
authors.lastname: Hwang
authors.forename: J J
authors.initials: JJ
authors.lastname: Ko
authors.forename: J M
authors.initials: JM
authors.lastname: Kim
authors.forename: J S
authors.initials: JS
authors.lastname: Yang
authors.forename: C K
authors.initials: CK
authors.lastname: Kim
mesh_terms: D000281:Administration, Intranasal; D000818:Animals; D003587:Cytomegalovirus / Q000235:genetics / Q000276:immunology; D005260:Female; D051379:Mice; D008807:Mice, Inbred BALB C; D009297:Nasal Mucosa / Q000276:immunology / Q000378:metabolism*; D009928:Organ Specificity / Q000235:genetics; D010957:Plasmids / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D014018:Tissue Distribution / Q000235:genetics; D019444:Vaccines, DNA / Q000008:administration & dosage*; D014765:Viral Vaccines / Q000008:administration & dosage / Q000493:pharmacokinetics
chemical_list: D019444:Vaccines, DNA; D014765:Viral Vaccines