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Molecules 2003, 8(1), 120-126; doi:10.3390/80100120
Article

A New Potent Route of DNA Vaccine Inoculation: DNA-Liposome Complexes on Bare Skin Induce Antigen-Special Antibody Responses

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Received: 1 January 2003 / Published: 31 January 2003
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Abstract

Transcutaneous immunization is a novel strategy for genetic vaccine immunization to induce detectable antigen-special antibody in humor and mucosal. In this study, plasmid expressing hepatitis B surface antigen (pGFP-HBsAg) was encapsulated in liposome, then DNA- liposome complexes were glued on bare skin of mice ear in different dosage (50μg, 10μg and 1μg). As control, DNA- liposome complexes of pGFP-HBsAg and pGFP vector were inoculated intraperitoneally. The anti-HBsAg antibodies of serum were detected weekly by ELISA. It was found that the detectable antibodies of transcutaneous immunized mouse were elicited after four weeks, and reached a maximum at the sixth week. Even 1μg plasmid DNA in liposomes through immune skin can elicit the highest ELISA antibody titer (> 1:512) in test group, and corresponding percentage of positive response is up to 71% at sixth week, but higher amounts of plasmid DNA (50μg DNA per mice) on immune skin cannot induce higher antibody levels. The result showed that DNA- liposome complexes glued on bare skin appear to be a novel method for the administration of DNA vaccines.
Keywords: genetic vaccine; liposome; transcutaneous immunization genetic vaccine; liposome; transcutaneous immunization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Liang, R.; Zhuang, F.; Meng, Z.; Deng, M.; Zheng, C.; Duan, M. A New Potent Route of DNA Vaccine Inoculation: DNA-Liposome Complexes on Bare Skin Induce Antigen-Special Antibody Responses. Molecules 2003, 8, 120-126.

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