title: Assessment of delivery parameters with the multi-electrode array for development of a DNA vaccine against Bacillus anthracis.
abstract: Gene electrotransfer (GET) enhances delivery of DNA vaccines by increasing both gene expression and immune responses. Our lab has developed the multi-electrode array (MEA) for DNA delivery to skin. The MEA was used at constant pulse duration (150 ms) and frequency (6.67 Hz). In this study, delivery parameters including applied voltage (5-45 V), amount of plasmid (100-300 μg), and number of treatments (2-3) were evaluated for delivery of a DNA vaccine. Mice were intradermally injected with plasmid expressing Bacillus anthracis protective antigen with or without GET and αPA serum titers measured. Within this experiment no significant differences were noted in antibody levels from varying dose or treatment number. However, significant differences were measured from applied voltages of 25 and 35 V. These voltages generated antibody levels between 20,000 and 25,000. Serum from animals vaccinated with these conditions also resulted in toxin neutralization in 40-60% of animals. Visual damage was noted at MEA conditions of 40 V. No damage was noted either visually or histologically from conditions of 35 V or below. These results reflect the importance of establishing appropriate electrical parameters and the potential for the MEA in non-invasive DNA vaccination against B. anthracis.
authors.affiliation: University of South Florida, College of Medicine, 12901 Bruce B. Downs Blvd., Tampa, FL 33612, USA; Old Dominion University, Center for Bioelectrics, 4211 Monarch Way, Suite 300, Norfolk, VA 23508, USA. Electronic address: adonate@odu.edu.
authors.forename: Amy
authors.initials: A
authors.lastname: Donate
authors.forename: Richard
authors.initials: R
authors.lastname: Heller
mesh_terms: D000818:Animals; D000881:Anthrax / Q000235:genetics* / Q000517:prevention & control; D000942:Antigens, Bacterial / Q000235:genetics / Q000276:immunology* / Q000633:toxicity; D001408:Bacillus anthracis / Q000276:immunology* / Q000472:pathogenicity; D001427:Bacterial Toxins / Q000235:genetics / Q000276:immunology* / Q000633:toxicity; D004566:Electrodes; D018014:Gene Transfer Techniques; D006801:Humans; D051379:Mice; D019444:Vaccines, DNA / Q000235:genetics / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D001427:Bacterial Toxins; D019444:Vaccines, DNA; C030325:anthrax toxin
keywords: Anthrax; Bacillus anthracis; DNA vaccination; ELISA; Electroporation; Enzyme linked immunosorbent assay; GET; Gene electrotransfer; IO; Injection alone of plasmid DNA; MEA; Multi electrode array; PA; Protective antigen; TNA; Toxin neutralization assay