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Expert Rev Vaccines. 2004 Aug;3(4 Suppl):S161-8.

Centralized immunogens as a vaccine strategy to overcome HIV-1 diversity.

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The Duke Human Vaccine Institute, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA.


Genetic variation of HIV-1 represents a major obstacle for AIDS vaccine development. With the amino acid sequence divergence as high as 30% in envelopes between different subtypes among HIV-1 group M viruses, it is unlikely that cross-subtype protection will occur equally well among all subtypes. Computer programs have been used to generate 'centralized' HIV gene sequences: consensus, ancestor or center of the tree. These sequences can decrease the genetic distances between the 'centralized' and wild-type gene immunogens to half of those between any wild-type immuongens to each other. Recent studies demonstrated that an artificial group M consensus env gene is equidistant from any subtype and recombinants. It is biologically functional and preserves antigenicity similar to contemporary Env proteins. Most importantly, the group M consensus Env immunogen can elicit both T- and B-cell responses to wild-type HIV-1 isolates.

[Indexed for MEDLINE]

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