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2018 ; 9
(ä): 1643
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Current Concepts of Antigen Cross-Presentation
#MMPMID30061897
Embgenbroich M
; Burgdorf S
Front Immunol
2018[]; 9
(ä): 1643
PMID30061897
show ga
Dendritic cells have the ability to efficiently present internalized antigens on
major histocompatibility complex (MHC) I molecules. This process is termed
cross-presentation and is important role in the generation of an immune response
against viruses and tumors, after vaccinations or in the induction of immune
tolerance. The molecular mechanisms enabling cross-presentation have been topic
of intense debate since many years. However, a clear view on these mechanisms
remains difficult, partially due to important remaining questions, controversial
results and discussions. Here, we give an overview of the current concepts of
antigen cross-presentation and focus on a description of the major
cross-presentation pathways, the role of retarded antigen degradation for
efficient cross-presentation, the dislocation of antigens from endosomal
compartment into the cytosol, the reverse transport of proteasome-derived
peptides for loading on MHC I and the translocation of the cross-presentation
machinery from the ER to endosomes. We try to highlight recent advances, discuss
some of the controversial data and point out some of the major open questions in
the field.