Boosting with an adenovirus-based vaccine improves protective efficacy against Venezuelan equine encephalitis virus following DNA vaccination.
There is a requirement for a vaccine that protects against the alphavirus, Venezuelan equine encephalitis virus (VEEV). Previous work has shown that DNA vaccines encoding structural proteins of VEEV can elicit immune responses and protection against VEEV though this protection is incomplete against airborne VEEV. In this study, we demonstrate that particle-mediated epidermal delivery of a DNA vaccine encoding the E2 glycoprotein of VEEV can be boosted with a mucosally-delivered Ad-based vaccine encoding the same E2 glycoprotein. This results in an improved Th2-type IgG response, an increase in neutralising antibody and a significant increase in protection against airborne VEEV. This indicates that prime-boost may be a suitable immunisation regimen for providing protection against airborne VEEV.
Perkins
Stuart D
SD
Biomedical Sciences Department, Defence Science and Technology Laboratory, Porton Down, Salisbury, Wiltshire SP4 OJQ, UK. sdperkins@dstl.gov.uk
O'Brien
Lyn M
LM
Phillpotts
Robert J
RJ
D000256:Adenoviridae / Q000235:genetics; D000279:Administration, Cutaneous; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D004666:Encephalitis Virus, Venezuelan Equine / Q000276:immunology*; D005260:Female; D007117:Immunization, Secondary; D007074:Immunoglobulin G / Q000097:blood / Q000145:classification; D051379:Mice; D008807:Mice, Inbred BALB C; D019444:Vaccines, DNA / Q000008:administration & dosage* / Q000276:immunology; D014614:Vaccines, Synthetic / Q000008:administration & dosage* / Q000276:immunology; D014759:Viral Envelope Proteins / Q000235:genetics* / Q000276:immunology; D014765:Viral Vaccines / Q000008:administration & dosage* / Q000276:immunology
D000914:Antibodies, Viral; D007074:Immunoglobulin G; D019444:Vaccines, DNA; D014614:Vaccines, Synthetic; D014759:Viral Envelope Proteins; D014765:Viral Vaccines; C064956:glycoprotein E2, equine encephalitis virus