Immunogenicity comparison of the intradermal or endobronchial boosting of BCG vaccinates with Ad5-85A

Adam Whelan, Pinar Court, Zhou Xing, Derek Clifford, Philip J. Hogarth, Martin Vordermeier, Bernardo Villarreal-Ramos*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (SciVal)

Abstract

Experiments in small animal models have indicated that intranasal vaccination confers a greater degree of protection against TB than other routes such as intradermal (i.d.) or intramuscular. In this work, using a prime-boost vaccination strategy, we have compared in cattle vaccinated with BCG as a priming vaccine the boosting capabilities of Ad5-85A delivered either via the endobronchial (e.b.) or i.d. route. We show that Ad5-85A delivered through either route induced comparable peripheral blood antigen specific responses, and that both i.d. and e.b. routes induced bronchioalveolar lavage cells (BALC) that produced antigen-specific IFNgamma. We also show that, regardless of the route of boosting, the kinetics of peripheral blood and BALC responses, as assessed by antigen specific IFNgamma production, are different with systemic responses being detectable earlier than mucosal responses.These results contribute to our understanding on how different vaccination strategies may affect different compartments of the immune response and in turn to the development of safer and more effective vaccines.

Original languageEnglish
Pages (from-to)6294-6300
Number of pages7
JournalVaccine
Volume30
Issue number44
Early online date10 Aug 2012
DOIs
Publication statusPublished - 28 Sept 2012

Keywords

  • Ad85A
  • BCG
  • IFNgamma
  • Prime-boost
  • T-cells
  • Tuberculosis

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