Abstract:
:Dendritic cells (DCs) initiate and regulate immunity against foreign and self antigens. Here we identified more than 200 individual major histocompatibility complex class II-associated peptides on human DCs and found that mature DCs selectively upregulated the self peptide CLIP. CLIP cosegregated together with foreign antigenic peptides in tetraspan microdomains on the surface and localized to DC-T cell synapses. The increased representation of CLIP-major histocompatibility complex class II complexes favored polarization of autologous naive T cells toward the nonpolarized and T helper type 2 (T(H)2) phenotype. There was also a considerably higher T(H)2/T(H)1 ratio in H2-DM-deficient mice, which have a CLIP(hi) phenotype, in contrast to wild-type, CLIP(lo) mice. Thus, the self peptide CLIP on DCs qualifies as an endogenous regulator in priming of T helper cells by antagonizing the polarization toward the T(H)1 phenotype.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Röhn TA,Boes M,Wolters D,Spindeldreher S,Müller B,Langen H,Ploegh H,Vogt AB,Kropshofer Hdoi
10.1038/ni1108keywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
909-18issue
9eissn
1529-2908issn
1529-2916pii
ni1108journal_volume
5pub_type
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