title: T lymphocytes that express CD4 and the alpha beta-T cell receptor but lack Thy-1. Preferential localization in Peyer's patches.
abstract: Thy-1- T cells expressing CD4 and the alpha beta-TCR have been identified in murine lymphoid tissues. These cells are particularly prevalent in Peyer's patches (PP), representing 17 +/- 3% of PP CD4 T cells, whereas they are much less prevalent in spleen, lymph nodes, lamina propria, or peritoneum. Phenotypic studies of fresh-isolated PP T cells demonstrate that all PP CD4 T cells (both Thy-1- and Thy-1+) express CD3, alpha beta-TCR, and CD5 (Lyt-1), whereas none coexpress CD8 (Lyt-2). Thy-1- and Thy-1+ CD4 T cell lines generated from PP also coexpress CD3 and alpha beta-TCR, but are heterogeneous in expression of CD5 and again do not coexpress CD8. Further studies revealed that Thy-1- CD4+ T cells were not present in nude mice. Short term stimulation of Thy-1+ CD4+ PP T cells with anti-CD3 resulted in loss of Thy-1 in a substantial fraction of these cells. Functional studies of Thy-1- and Thy-1+ CD4+ PP T cells indicate that fresh-isolated Thy-1- CD4+ cells do not proliferate in response to insoluble anti-CD3 but do proliferate when stimulated with soluble anti-CD3 in the presence of feeder cells. In contrast, Thy-1+ CD4+ cells proliferate well to both stimuli. However, Thy-1- CD4+ PP T cells adapted to in vitro culture exhibit vigorous proliferative responses when stimulated with either form of anti-CD3. Evaluation of lymphokine secretion by fresh-isolated Thy-1- and Thy-1+ CD4+ PP T cells revealed that both make substantial amounts of IL-2; however, Thy-1- T cells made less IL-4 than their Thy-1+ counterparts. Neither population made IL-5 or IFN-gamma. Similarly, Thy-1- and Thy-1+ CD4 T cell lines made similar amounts of IL-2; again Thy-1- T cells made less IL-4; and in this case Thy-1- T cells made IL-5 albeit significantly less than the Thy-1+ cells. Finally, immunohistochemical studies suggested that many of the CD4+ T cells in PP germinal centers were Thy-1-, indicating that Thy-1- and Thy-1+ CD4 T cells differ in their distribution within the PP. These studies thus define a phenotypically and functionally distinct T cell population which is most prevalent in murine Peyer's patches.
authors.affiliation: Mucosal Immunity Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.
authors.forename: G R
authors.initials: GR
authors.lastname: Harriman
authors.forename: N Y
authors.initials: NY
authors.lastname: Lycke
authors.forename: L J
authors.initials: LJ
authors.lastname: Elwood
authors.forename: W
authors.initials: W
authors.lastname: Strober
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis* / Q000235:genetics; D015152:Blotting, Northern; D017252:CD3 Complex; D015704:CD4 Antigens / Q000032:analysis; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology* / Q000276:immunology; D002454:Cell Differentiation; D005434:Flow Cytometry; D015870:Gene Expression; D008213:Lymphocyte Activation; D008221:Lymphoid Tissue / Q000166:cytology; D008222:Lymphokines / Q000096:biosynthesis; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D010581:Peyer's Patches / Q000166:cytology* / Q000276:immunology; D011948:Receptors, Antigen, T-Cell / Q000032:analysis; D016176:T-Lymphocyte Subsets / Q000166:cytology* / Q000276:immunology; D018800:Thy-1 Antigens
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D017252:CD3 Complex; D015704:CD4 Antigens; D008222:Lymphokines; D011948:Receptors, Antigen, T-Cell; D018800:Thy-1 Antigens