Immunogenicity and Biodistribution of Anthrax DNA Vaccine Delivered by Intradermal Electroporation

Author:

Kim Na Young1,Son Won Rak1,Choi Jun Young1,Yu Chi Ho2,Hur Gyeung Haeng2,Jeong Seong Tae2,Shin Young Kee3,Hong Sung Youl3,Shin Sungho4ORCID

Affiliation:

1. ABION Inc., R&D Center, Seoul, Korea

2. The 4th R&D Institute Directorate, Agency for Defense Development, Daejon, Korea

3. Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Korea

4. Bio-MAX/N-Bio, Seoul National University, Seoul, Korea

Abstract

Purpose: Anthrax is a lethal bacterial disease caused by gram-positive bacterium Bacillus anthracis and vaccination is a desirable method to prevent anthrax infections. In the present study, DNA vaccine encoding a protective antigen of Bacillus anthracis was prepared and we investigated the influence of DNA electrotransfer in the skin on the induced immune response and biodistribution. Methods and Results: The tdTomato reporter gene for the whole animal in vivo imaging was used to assess gene transfer efficiency into the skin as a function of electrical parameters. Compared to that with 25 V, the transgene expression of red fluorescent protein increased significantly when a voltage of 90 V was used. Delivery of DNA vaccines expressing Bacillus anthracis protective antigen domain 4 (PAD4) with an applied voltage of 90 V induced robust PA-D4-specific antibody responses. In addition, the in vivo fate of anthrax DNA vaccine was studied after intradermal administration into the mouse. DNA plasmids remained at the skin injection site for an appropriate period of time after immunization. Intradermal administration of DNA vaccine resulted in detection in various organs (viz., lung, heart, kidney, spleen, brain, and liver), although the levels were significantly reduced. Conclusion: Our results offer important insights into how anthrax DNA vaccine delivery by intradermal electroporation affects the immune response and biodistribution of DNA vaccine. Therefore, it may provide valuable information for the development of effective DNA vaccines against anthrax infection.

Funder

Agency for Defense Development

Publisher

Bentham Science Publishers Ltd.

Subject

Pharmaceutical Science

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