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Expression of cutaneous lymphocyte-associated antigen on human CD4+ and CD8+ Th2 cells

✍ Scribed by Mübeccel Akdis; Sven Klunker; Michael Schliz; Kurt Blaser; Cezmi A. Akdis


Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
179 KB
Volume
30
Category
Article
ISSN
0014-2980

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✦ Synopsis


The cutaneous lymphocyte-associated antigen (CLA) represents the homing receptor involved in selective migration of memory/effector T cells to the skin. Numerous reports demonstrated distinct CLA expression on Th1 cells. However, T cells isolated from skin lesions and CLA + T cells circulating in peripheral blood of atopic dermatitis patients expressed high IL-5 and IL-13. Accordingly, we investigated the regulation of CLA on human type 1 and type 2 T cells. CLA was induced on freshly generated Th1 and Tc1 cells only, but not on those of type 2. Anti-CD3 stimulation was sufficient to induce CLA on Th2 cells in the absence of serum in the culture medium. In serum containing medium, IL-4 inhibited CLA and related § -fucosyltransferase mRNA expression. IL-12 and/or staphylococcal enterotoxin B (SEB) stimulation up-regulated CLA expression on either Th2 and Tc2 cells. On stimulation with IL-12, CLA was expressed on the surface of bee venom phospholipase A 2specific Th1, Th2, Th0 and T regulatory 1 clones, representing non-skin-related antigenspecific T cells. In addition, CLA could be re-induced on T cells that had lost CLA expression upon resting. These results suggest that skin-selective homing is not restricted to functional and phenotypic T cell subsets.


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