Differential MHC class II synthesis and ubiquitination confers distinct antigen-presenting properties on conventional and plasmacytoid dendritic cells

Louise J. Young, Nicholas S. Wilson, Petra Schnorrer, Anna I Proietto, Toine ten Broeke, Yohei Matsuki, Adele M. Mount, Gabrielle T Belz, Meredith O'Keeffe, Mari Ohmura-Hoshino, Satoshi Ishido, Willem Stoorvogel, William R Heath, Ken Shortman, Jose A Villadangos

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178 Citations (Scopus)


The importance of conventional dendritic cells (cDCs) in the processing and presentation of antigen is well established, but the contribution of plasmacytoid dendritic cells (pDCs) to these processes, and hence to T cell immunity, remains unclear. Here we showed that unlike cDCs, pDCs continued to synthesize major histocompatibility complex (MHC) class II molecules and the MHC class II ubiquitin ligase MARCH1 long after activation. Sustained MHC class II-peptide complex formation, ubiquitination and turnover rendered pDCs inefficient in the presentation of exogenous antigens but enabled pDCs to continuously present endogenous viral antigens in their activated state. As the antigen-presenting abilities of cDCs and pDCs are fundamentally distinct, these two cell types may activate largely nonoverlapping repertoires of CD4+ T cells.

Original languageEnglish
Pages (from-to)1244-1252
Number of pages9
JournalNature Immunology
Issue number11
Publication statusPublished - 2008
Externally publishedYes

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