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Vaccines and Antiviral Agents

Overcoming Immunity to a Viral Vaccine by DNA Priming before Vector Boosting

Zhi-yong Yang, Linda S. Wyatt, Wing-pui Kong, Zoe Moodie, Bernard Moss, Gary J. Nabel
Zhi-yong Yang
1Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-3005
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Linda S. Wyatt
2Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-0445
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Wing-pui Kong
1Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-3005
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Zoe Moodie
3Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024
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Bernard Moss
2Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-0445
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Gary J. Nabel
1Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-3005
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  • For correspondence: gnabel@nih.gov
DOI: 10.1128/JVI.77.1.799-803.2003
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ABSTRACT

Replication-defective adenovirus (ADV) and poxvirus vectors have shown potential as vaccines for pathogens such as Ebola or human immunodeficiency virus in nonhuman primates, but prior immunity to the viral vector in humans may limit their clinical efficacy. To overcome this limitation, the effect of prior viral exposure on immune responses to Ebola virus glycoprotein (GP), shown previously to protect against lethal hemorrhagic fever in animals, was studied. Prior exposure to ADV substantially reduced the cellular and humoral immune responses to GP expressed by ADV, while exposure to vaccinia inhibited vaccine-induced cellular but not humoral responses to GP expressed by vaccinia. This inhibition was largely overcome by priming with a DNA expression vector before boosting with the viral vector. Though heterologous viral vectors for priming and boosting can also overcome this effect, the paucity of such clinical viral vectors may limit their use. In summary, it is possible to counteract prior viral immunity by priming with a nonviral, DNA vaccine.

  • Copyright © 2003 American Society for Microbiology
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Overcoming Immunity to a Viral Vaccine by DNA Priming before Vector Boosting
Zhi-yong Yang, Linda S. Wyatt, Wing-pui Kong, Zoe Moodie, Bernard Moss, Gary J. Nabel
Journal of Virology Jan 2003, 77 (1) 799-803; DOI: 10.1128/JVI.77.1.799-803.2003

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Overcoming Immunity to a Viral Vaccine by DNA Priming before Vector Boosting
Zhi-yong Yang, Linda S. Wyatt, Wing-pui Kong, Zoe Moodie, Bernard Moss, Gary J. Nabel
Journal of Virology Jan 2003, 77 (1) 799-803; DOI: 10.1128/JVI.77.1.799-803.2003
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KEYWORDS

Adenoviridae
ebolavirus
Vaccines, DNA
vaccinia virus
Viral Vaccines

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