期刊
TRENDS IN IMMUNOLOGY
卷 28, 期 1, 页码 19-25出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.it.2006.11.001
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Much attention has focused on the role of co-stimulation in dictating tolerance versus immunity to internalized antigens, with the assumption that the presentation of antigen-derived peptides by MHC molecules occurs constitutively. Here, I highlight: our new appreciation for the regulated presentation of phagocytosed antigens by MHC class II molecules as a direct result of controlling phagosome maturation by Toll-like receptors. I discuss how the mode of antigen delivery into dendritic cells coupled with the right type of signal transduction pathway can impact greatly not only the co-stimulatory context in which the antigen is presented to naive T cells (signal 2) but MHC-II presentation of the antigen and formation of the T-cell receptor ligand (signal 1) itself.
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