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J Infect Dis. 2016 Aug 1;214(3):369-78. doi: 10.1093/infdis/jiw111. Epub 2016 Mar 21.

Rapid and Long-Term Immunity Elicited by DNA-Encoded Antibody Prophylaxis and DNA Vaccination Against Chikungunya Virus.

Author information

1
Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania The Wistar Institute, Philadelphia, Pennsylvania.
2
Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania.
3
Regional Medical Research Centers, Indian Council of Medical Research, Port Blair, Andaman & Nicobar Islands.
4
Department of Microbiology, Sri Ramachandra Medical College & Research Institute, Chennai, India.
5
Inovio Pharmaceutics Inc., Plymouth Meeting, Pennsylvania.
6
Department of Molecular Medicine, University of South Florida Morsani College of Medicine, Tampa.

Abstract

BACKGROUND:

Vaccination and passive antibody therapies are critical for controlling infectious diseases. Passive antibody administration has limitations, including the necessity for purification and multiple injections for efficacy. Vaccination is associated with a lag phase before generation of immunity. Novel approaches reported here utilize the benefits of both methods for the rapid generation of effective immunity.

METHODS:

A novel antibody-based prophylaxis/therapy entailing the electroporation-mediated delivery of synthetic DNA plasmids encoding biologically active anti-chikungunya virus (CHIKV) envelope monoclonal antibody (dMAb) was designed and evaluated for antiviral efficacy, as well as for the ability to overcome shortcomings inherent with conventional active vaccination and passive immunotherapy.

RESULTS:

One intramuscular injection of dMAb produced antibodies in vivo more rapidly than active vaccination with an anti-CHIKV DNA vaccine. This dMAb neutralized diverse CHIKV clinical isolates and protected mice from viral challenge. Combination of dMAb and the CHIKV DNA vaccine afforded rapid and long-lived protection.

CONCLUSIONS:

A DNA-based dMAb strategy induced rapid protection against an emerging viral infection. This method can be combined with DNA vaccination as a novel strategy to provide both short- and long-term protection against this emerging infectious disease. These studies have implications for pathogen treatment and control strategies.

KEYWORDS:

DNA plasmid; chikungunya virus; dMAb; monoclonal antibody; passive antibody prophylaxis and therapy

PMID:
27001960
PMCID:
PMC4936642
DOI:
10.1093/infdis/jiw111
[Indexed for MEDLINE]
Free PMC Article

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