Identification and characterisation of T-cell epitopes for incorporation into dendritic cell-delivered Listeria vaccines

Ricardo Calderon-Gonzalez, Raquel Tobes, Eduardo Pareja, Elisabet Frande-Cabanes, Nikolai Petrovsky, Carmen Alvarez-Dominguez

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Dendritic cells loaded with antigenic peptides, because of their safety and robust immune stimulation, would be ideal for induction of immunity to protect against listeriosis. However, there is no currently accepted method to predict which peptides derived from the Listeria proteome might confer protection. While elution of peptides from MHC molecules after Listeria infection yields high-affinity immune-dominant epitopes, these individual epitopes did not reliably confer Listeria protection. Instead we applied bioinformatic predictions of MHC class I and II epitopes to generate antigenic peptides that were then formulated with Advax™, a novel polysaccharide particulate adjuvant able to enhance cross-presentation prior to being screened for their ability to induce protective T-cell responses. A combination of at least four intermediate strength MHC-I binding epitopes and one weak MHC-II binding epitope when expressed in a single peptide sequence and formulated with Advax adjuvant induced a potent T-cell response and high TNF-α and IL-12 production by dendritic cells resulting in robust listeriosis protection in susceptible mice. This T-cell vaccine approach might be useful for the design of vaccines to protect against listeriosis or other intracellular infections.
Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalJournal of Immunological Methods
Volume424
DOIs
Publication statusPublished - Sep 2015
Externally publishedYes

Keywords

  • Listeriosis
  • Dendritic cells
  • Vaccines
  • Listeriolysin O
  • GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE

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