Ceramide inhibits antigen uptake and presentation by dendritic cells

被引:89
作者
Sallusto, F
Nicolo, C
DeMaria, R
Corinti, S
Testi, R
机构
[1] UNIV ROMA TOR VERGATA,DEPT EXPT MED & BIOCHEM SCI,I-00133 ROME,ITALY
[2] IST SUPER SANITA,DEPT IMMUNOL,I-00161 ROME,ITALY
关键词
D O I
10.1084/jem.184.6.2411
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Ceramides are intramembrane diffusible mediators involved in transducing signals originated from a variety of cell surface receptors. Different adaptive and differentiative cellular responses, including apoptotic cell death, use ceramide-mediated pathways as an essential part of the program. Here, we show that human dendritic cells respond to CD40 ligand, as well as to tumor necrosis factor-alpha and IL-1 beta, with intracellular ceramide accumulation, as they are induced to differentiate. Dendritic cells down-modulate their capacity to take up soluble antigens in response to exogenously added or endogenously produced ceramides. This is followed by an impairment in presenting soluble antigens to specific T cell clones, while cell viability and the capacity to stimulate allogeneic responses or to present immunogenic peptides is fully preserved. Thus, ceramide-mediated pathways initiated by different cytokines can actively modulate professional antigen-presenting cell function and antigen-specific immune responses.
引用
收藏
页码:2411 / 2416
页数:6
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