T-cell-biased immune responses generated by a mucosally targeted adenovirus-σ1 vaccine

E. A. Weaver, G. T. Mercier, S. Gottschalk, M. A. Barry

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


As most pathogens enter through the mucosa, it is important to develop vaccines that induce mucosal immunity. To this end, we generated a novel adenovirus (Ad) vaccine that displays the σ1 protein from reovirus to target junctional adhesion molecule 1 and sialic acid. Replication-defective Ad5 vectors were modified by replacement of the Ad fiber protein with σ1(T3Dσ1) protein of reovirus T3D in previous work. Ad5 and Ad5-σ1 were compared in mouse models for gene delivery and vaccination to monitor cytokine, antibody, and T-cell responses. The viruses were also tested for the ability to transduce and mature dendritic cells. Ad5-σ1 was 40-fold less efficient at gene delivery in vivo, yet it was capable of inducing equal or greater cellular immune responses and systemic interferon-γ levels than Ad5 after intranasal administration. Despite weaker gross transduction, intranasal administration of Ad5-σ1 produced more green fluorescent protein-positive (GFP) major histocompatibility complex class II (MHC II) cells in the draining lymph nodes, less GFP/MHC II cells in the lungs, and mediated modestly better maturation of dendritic cells in vitro. These data suggest that targeting gene-based vaccination via the σ1 protein may enhance the T-cell immune response, perhaps by skewing immune responses to encoded antigens.

Original languageEnglish (US)
Pages (from-to)311-319
Number of pages9
JournalMucosal Immunology
Issue number3
StatePublished - May 2012
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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