Format

Send to

Choose Destination
See comment in PubMed Commons below
Curr Opin Cell Biol. 2008 Aug;20(4):437-44. doi: 10.1016/j.ceb.2008.05.011. Epub 2008 Jul 5.

Endosomal sorting of MHC class II determines antigen presentation by dendritic cells.

Author information

  • 1Institut Curie, Centre National de la Recherche Scientifique-Unité Mixte de Recherche 144, Paris 75248, France. Guillaume.van-Niel@Curie.fr

Abstract

Dendritic cells (DCs) initiate primary immune responses by presenting pathogen-derived antigens in association with major histocompatibility Class II molecules (MHC II) to T cells. In DCs, MHC II is constitutively synthesized and loaded at endosomes with peptides from hydrolyzed endogenous proteins or exogenously acquired antigens. Whether peptide loaded MHC II (MHC II-p) is subsequently recruited to and stably expressed at the plasma membrane or degraded in lysosomes is determined by the status of the DC. In immature DCs, MHC II-p is ubiquitinated after peptide loading, driving its sorting to the luminal vesicles of multivesicular bodies. These luminal vesicles, and the MHC II-p they carry, are delivered to lysosomes for degradation. MHC II-p is inefficiently ubiquitinated in DCs that are activated by pathogens or inflammatory stimuli, thus allowing its transfer to and stable expression at the plasma membrane.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk