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- W4313310004 endingPage "3281" @default.
- W4313310004 startingPage "3271" @default.
- W4313310004 abstract "Abstract Mouse CD1 (mCD1) glycoproteins are known to present peptides, while human CD1 molecules present glycolipids. In mice, mCD1-autoreactive NK T cells play critical roles in various immune responses, through the secretion of high amounts of cytokines. This study was initiated to determine whether glycolipids are involved in the autorecognition of mCD1 by NK T cells. α-Galactosylceramide (α-GalCer) was the only glycolipid tested capable of eliciting an mCD1-restricted response by splenic T cells. Moreover, splenic T cells derived from mCD1-deficient mice were not stimulated by α-GalCer, suggesting that the responsive T cells are selected by mCD1. Using cytoflow techniques, we confirmed that, in response to α-GalCer, IFN-γ-secreting cells displayed an NK T cell phenotype. The predominance of IFN-γ vs IL-4, however, is determined by the type of mCD1+ APC, suggesting the potential for APC regulation of cytokine production by NK T cells. Among a panel of 10 mCD1-autoreactive T cell hybridomas, only the ones that express the typical Vα14Jα281 TCR rearrangement of NK T cells responded to α-GalCer. Fixation or treatment of mCD1+ APCs with an inhibitor of endosomal acidification and the use of mCD1 mutants unable to traffic through endosome still allowed α-GalCer to stimulate NK T cells. Thus, endosomal trafficking and Ag processing are not required for glycolipid recognition. In summary, α-GalCer might be the autologous ligand, or a mimic of a glycolipid ligand, involved in the mCD1-mediated stimulation of NK T cells." @default.
- W4313310004 created "2023-01-06" @default.
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- W4313310004 date "1998-10-01" @default.
- W4313310004 modified "2023-10-14" @default.
- W4313310004 title "Selective Ability of Mouse CD1 to Present Glycolipids: α-Galactosylceramide Specifically Stimulates Vα14+ NK T Lymphocytes" @default.
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- W4313310004 doi "https://doi.org/10.4049/jimmunol.161.7.3271" @default.
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