Hepatitis B virus-like particles access major histocompatibility class I and II antigen presentation pathways in primary dendritic cells

Jessica M Moffat, Wan Shoo Cheong, Jose A Villadangos, Justine Mintern, Hans Jurgen Netter

Research output: Contribution to journalArticleResearchpeer-review

17 Citations (Scopus)

Abstract

Virus-like particles (VLPs) represent high density displays of viral proteins that efficiently trigger immunity. VLPs composed of the small hepatitis B virus envelope protein (HBsAgS) are useful vaccine platforms that induce humoral and cellular immune responses. Notably, however, some studies suggest HBsAgS VLPs impair dendritic cell (DC) function. Here we investigated HBsAgS VLP interaction with DC subsets and antigen access to major histocompatibility complex (MHC) class I and II antigen presentation pathways in primary DCs. HBsAgS VLPs impaired plasmacytoid DC (pDC) interferon alpha (IFNalpha) production in response to CpG in vitro, but did not alter conventional DC (cDC) or pDC phenotype when administered in vivo. To assess cellular immune responses, HBsAgS VLPs were generated containing the ovalbumin (OVA) model epitopes OVA257-264 and OVA323-339 to access MHCI and MHCII antigen presentation pathways, respectively; both in vitro and following immunisation in vivo. HBsAgS VLP-OVA257-264 elicited CTL responses in vivo that were not enhanced by inclusion of an additional MHCII helper epitope. HBsAgS VLP-OVA257-264 administered in vivo was cross-presented by CD8(+) DCs, but not CD8(-) DCs. Therefore, HBsAgS VLPs can deliver antigen to both MHCI and MHCII antigen presentation pathways in primary DCs and promote cytotoxic and helper T cell priming despite their suppressive effect on pDCs.
Original languageEnglish
Pages (from-to)2310 - 2316
Number of pages7
JournalVaccine
Volume31
Issue number18
DOIs
Publication statusPublished - 2013

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