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Rhesus macaques vaccinated with consensus envelopes elicit partially protective immune responses against SHIV SF162p4 challenge

Eugene, HS and Pierce-Paul, BR and Cragio, JK and Ross, TM (2013) Rhesus macaques vaccinated with consensus envelopes elicit partially protective immune responses against SHIV SF162p4 challenge. Virology Journal, 10.

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Abstract

The development of a preventative HIV/AIDS vaccine is challenging due to the diversity of viral genome sequences, especially in the viral envelope (Env160). Since it is not possible to directly match the vaccine strain to the vast number of circulating HIV-1 strains, it is necessary to develop an HIV-1 vaccine that can protect against a heterologous viral challenge. Previous studies from our group demonstrated that a mixture of wild type clade B Envgp160s were able to protect against a heterologous clade B challenge more effectively than a consensus clade B Envgp160 vaccine. In order to broaden the immune response to other clades of HIV, in this study rhesus macaques were vaccinated with a polyvalent mixture of purified HIV-1 trimerized consensus Envgp140 proteins representing clades A, B, C, and E. The elicited immune responses were compared to a single consensus Envgp140 representing all isolates in group M (Con M). Both vaccines elicited anti- Envgp140 IgG antibodies that bound an equal number of HIV-1 Envgp160 proteins representing clades A, B and C. In addition, both vaccines elicited antibodies that neutralized the HIV-1SF162 isolate. However, the vaccinated monkeys were not protected against SHIV SF162p4 challenge. These results indicate that consensus Env gp160 vaccines, administered as purified Envgp140 trimers, elicit antibodies that bind to Envgp160s from strains representing multiple clades of HIV-1, but these vaccines did not protect against heterologous SHIV challenge. © 2013 Eugene et al.; licensee BioMed Central Ltd.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Eugene, HS
Pierce-Paul, BR
Cragio, JK
Ross, TM
Centers: Other Centers, Institutes, or Units > Center for Vaccine Research
Date: 4 April 2013
Date Type: Publication
Journal or Publication Title: Virology Journal
Volume: 10
DOI or Unique Handle: 10.1186/1743-422x-10-102
Schools and Programs: School of Medicine > Microbiology and Molecular Genetics
School of Medicine > Molecular Virology and Microbiology
Refereed: Yes
Date Deposited: 04 Oct 2016 18:09
Last Modified: 02 Feb 2019 16:57
URI: http://d-scholarship.pitt.edu/id/eprint/29737

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