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- W1539488492 abstract "Activation of CD4(+) Th cells requires their cognate interaction with APCs bearing specific relevant MHC class II-peptide complexes. This cognate interaction culminates in the formation of an immunological synapse that contains the various proteins and lipids required for efficient T cell activation. We now show that APC lipid raft membrane microdomains contain specific class II-peptide complexes and serve as platforms that deliver these raft-associated class II molecules to the immunological synapse. APC rafts are required for T cell:APC conjugate formation and T cell activation at low densities of relevant class II-peptide complexes, a requirement that can be overcome at high class II-peptide density. Analysis of confocal microscopy images revealed that over time APC lipid rafts, raft-associated relevant class II-peptide complexes, and even immunologically irrelevant class II molecules accumulate at the immunological synapse. As the immunological synapse matures, relevant class II-peptide complexes are sorted to a central region of the interface, while irrelevant class II molecules are excluded from this site. We propose that T cell activation is facilitated by recruitment of MHC class II-peptide complexes to the immunological synapse by virtue of their constitutive association with lipid raft microdomains." @default.
- W1539488492 created "2016-06-24" @default.
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- W1539488492 date "2003-02-01" @default.
- W1539488492 modified "2023-10-12" @default.
- W1539488492 title "MHC Class II-Peptide Complexes and APC Lipid Rafts Accumulate at the Immunological Synapse" @default.
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- W1539488492 doi "https://doi.org/10.4049/jimmunol.170.3.1329" @default.
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