title: Induction of immunity against hepatitis B virus surface antigen by intranasal DNA vaccination using a cationic emulsion as a mucosal gene carrier.
abstract: Delivery of DNA vaccines to airway mucosa would be an ideal method for mucosal immunization. However, there have been few reports of a suitable gene delivery system. In this study we used a cationic emulsion to immunize mice via the intranasal route with pCMV-S coding for Hepatitis B virus surface antigen (HBsAg). Complexing pCMV-S with a cationic emulsion dramatically enhanced HBsAg expression in both nasal tissue and lung, and was associated with increases in the levels of HBs-specific Abs in serum and mucosal fluids, of cytotoxic T lymphocytes (CTL) in the spleen and cervical and iliac lymph nodes, and of delayed-type hypersensitivity (DTH) against HBsAg. In contrast, very weak humoral and cellular immunities were observed following immunization with naked DNA. In support of these observations, a higher proliferative response of spleenocytes was detected in the group immunized with the emulsion/pCMV-S complex than in the group immunized with naked pCMV-S. These findings may facilitate development of an emulsion-mediated gene vaccination technique for use against intracellular pathogens that invade mucosal surfaces.
authors.affiliation: College of Pharmacy, Kyung Hee University, Seoul 130-701, Korea.
authors.forename: Tae Woo
authors.initials: TW
authors.lastname: Kim
authors.forename: Hesson
authors.initials: H
authors.lastname: Chung
authors.forename: Ick Chan
authors.initials: IC
authors.lastname: Kwon
authors.forename: Ha Chin
authors.initials: HC
authors.lastname: Sung
authors.forename: Tae Heung
authors.initials: TH
authors.lastname: Kang
authors.forename: Hee Dong
authors.initials: HD
authors.lastname: Han
authors.forename: Seo Young
authors.initials: SY
authors.lastname: Jeong
mesh_terms: D000281:Administration, Intranasal; D000818:Animals; D016207:Cytokines / Q000276:immunology; D003587:Cytomegalovirus / Q000235:genetics; D004655:Emulsions; D005260:Female; D006510:Hepatitis B Antibodies / Q000032:analysis*; D006514:Hepatitis B Surface Antigens / Q000235:genetics* / Q000276:immunology*; D017325:Hepatitis B Vaccines / Q000008:administration & dosage / Q000276:immunology*; D006968:Hypersensitivity, Delayed; D007111:Immunity, Cellular; D018928:Immunity, Mucosal / Q000235:genetics; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D010957:Plasmids; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D019444:Vaccines, DNA / Q000008:administration & dosage / Q000276:immunology*
chemical_list: D016207:Cytokines; D004655:Emulsions; D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens; D017325:Hepatitis B Vaccines; D019444:Vaccines, DNA