Anti-adenovirus humoral responses influence on the efficacy of vaccines based on epitope display on adenovirus capsid - PubMed

Anti-adenovirus humoral responses influence on the efficacy of vaccines based on epitope display on adenovirus capsid

Anastasia Lanzi et al. Vaccine. 2011.

Abstract

The efficacy of recombinant adenoviruses (Ads) vaccine vectors is diminished by the high prevalence of anti-Ad antibodies (Abs) that hampers gene transfer. Epitope display on Ad capsid constitutes an alternative approach to bypass anti-Ad Ab capacity from blocking antigen expression. To understand the role of the epitope insertion site, an ovalbumin-derived epitope was genetically inserted into either Ad hexon or fiber proteins. Hexon-modified Ads triggered higher anti-ovalbumin Ab responses after one injection but surprisingly fiber-modified Ads were by far more potent after two or several administrations. Our data unravel a role for anti-Ad humoral immunity in controlling anti-epitope humoral responses.

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