title: Preferential tissue localization of bovine gamma delta T cell subsets defined by anti-T cell receptor for antigen antibodies.
abstract: Clonal and oligoclonal populations of gammadelta T cells, with respect to the expression of T cell receptors for antigen (Tcr), have been shown to localize in normal and inflamed tissues. The mechanisms responsible for the tissue-selective accumulation of these subsets are still not known. gammadelta T cells are the predominant T cell subset in newborn calves, making this animal a useful model to study these cells. However, molecular markers defining tissue-specific bovine ydelta T cell subsets are only now being developed. In this report, we describe three new anti-bovine gammadelta Tcr mAbs: GD3.8, GD197 and GD3.1, which provide useful tools to study these cells. GD3.8 recognized virtually all gammadelta T cells in the blood; whereas GD3.1 and GD197 recognized mutually exclusive as well as overlapping subsets. Using these three mAbs, four separate subsets of gammadelta T cells were defined: subset 1 (GD3.8+, GD3.1+, GD197-); subset 2 (GD3.8+, GD3.1-, GD197+); subset 3 (GD3.8+, GD3.1+, GD197+); and subset 4 (GD3.8+, GD3.1-, GD197-). Subset 4 constituted a minor population in the blood; however, it predominated in the spleen and, in some cases, represented a 300% increase over blood levels. The percentage of GD3.1-positive gammadelta T cells was found to be increased in experimentally inflamed lymph nodes, suggesting that subset 1 cells may be preferentially retained in or recruited to sites of inflammation. Some subset 4 cells also exhibited a decreased ability to respond to PHA. These studies demonstrate that bovine gammadelta T cell, Tcr-defined subsets, exhibit unique accumulation and activation characteristics that may provide clues to their function and regulation.
authors.affiliation: Veterinary Molecular Biology, Montana State University, Bozeman 59717, USA.
authors.forename: E
authors.initials: E
authors.lastname: Wilson
authors.forename: B
authors.initials: B
authors.lastname: Walcheck
authors.forename: W C
authors.initials: WC
authors.lastname: Davis
authors.forename: M A
authors.initials: MA
authors.lastname: Jutila
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000911:Antibodies, Monoclonal; D000918:Antibody Specificity; D000941:Antigens / Q000276:immunology; D002417:Cattle; D002478:Cells, Cultured; D005434:Flow Cytometry; D007249:Inflammation / Q000276:immunology*; D008198:Lymph Nodes / Q000276:immunology*; D008213:Lymphocyte Activation / Q000187:drug effects; D018655:Lymphocyte Count; D008970:Molecular Weight; D010835:Phytohemagglutinins / Q000494:pharmacology; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000276:immunology*; D013154:Spleen / Q000276:immunology*; D016176:T-Lymphocyte Subsets / Q000187:drug effects / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D000941:Antigens; D010835:Phytohemagglutinins; D016692:Receptors, Antigen, T-Cell, gamma-delta; D014409:Tumor Necrosis Factor-alpha