title: Expression of cutaneous lymphocyte-associated antigen on human CD4(+) and CD8(+) Th2 cells.
abstract: 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 alpha-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(2)-specific Th1, Th2, Th0 and T regulatory 1 clones, representing non-skin-related antigen-specific 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.
authors.affiliation: Swiss Institute of Allergy and Asthma Research (SIAF), Davos, Switzerland. akdism@siaf.unizh.ch
authors.forename: M
authors.initials: M
authors.lastname: Akdis
authors.forename: S
authors.initials: S
authors.lastname: Klunker
authors.forename: M
authors.initials: M
authors.lastname: Schliz
authors.forename: K
authors.initials: K
authors.lastname: Blaser
authors.forename: C A
authors.initials: CA
authors.lastname: Akdis
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D015704:CD4 Antigens / Q000032:analysis*; D016827:CD8 Antigens / Q000032:analysis*; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis; D018664:Interleukin-12 / Q000494:pharmacology; D015847:Interleukin-4 / Q000494:pharmacology; D008562:Membrane Glycoproteins / Q000032:analysis*; D051381:Rats; D016201:Receptors, Lymphocyte Homing / Q000032:analysis*; D018417:Th1 Cells / Q000737:chemistry; D018418:Th2 Cells / Q000737:chemistry*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D015704:CD4 Antigens; D016827:CD8 Antigens; C063419:CTAGE1 protein, human; D008562:Membrane Glycoproteins; D016201:Receptors, Lymphocyte Homing; D018664:Interleukin-12; D015847:Interleukin-4; D007371:Interferon-gamma