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Goat γδ T cell subpopulations defined by WC1 expression, responses to pathogens and cytokine production. 2021

Alehegne W Yirsaw, and Alexandria Gillespie, and Emily Britton, and Alyssa Doerle, and Lisa Johnson, and Susan Marston, and Janice Telfer, and Cynthia L Baldwin
Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA, 01003, USA.

The major functions of γδ T cells in mammals overlap with those of αβ T cells but differ in that γδ T cells are rapid responders and see different types of antigens. While γδ T cells have been shown to be a major population of circulating lymphocytes in artiodactyl species such as cattle, sheep, and pigs, less is known about these cells in goats, an important agricultural species. We have recently shown that WC1, a γδ T cell-specific family of hybrid pattern recognition receptors/co-receptors, is a multigenic family in goats expanded beyond what occurs in cattle. This study was conducted to address some of the limitations of previous studies in determining the proportions of γδ T cells, WC1+ γδ T cells as well as the WC1.1+ and WC1.2+ subpopulations in blood and to evaluate their responses to various pathogens. Previously, the proportion of caprine γδ T cells was determined using a monoclonal antibody (mAb) 86D that we show here does not react with all γδ T cells thereby underestimating their contribution to the lymphocyte population. Using a mAb reactive with the TCRδ constant region we found the proportion of γδ T cells in blood was not significantly less than that of either CD4 or CD8 T cells and did not decrease with age after 6 months. γδ T cells that expressed WC1 ranged from ~20 to 85% of the total γδ T cells. Less than half of those were classified as WC1.1+ or WC1.2+ by mAb staining thus indicating a third major WC1+ population. We found that naïve γδ T cells proliferated in cultures of PBMC stimulated with antigens of Leptospira or Mycobacterium avium paratuberculosis (MAP) more than they did in control medium cultures or in those stimulated with M. bovis BCG antigens and that the responding γδ T cells included both WC1+ and WC1- cells. In ex vivo PMA/ionomycin-stimulated cultures of WC1- γδ T cells but not WC1+ cells produced both IL-17 and IFNγ. In longterm cultures with Leptospira or MAP both WC1- and WC1+ cells proliferated but only WC1- γδ T cells produced IL-17. In conclusion, goats have a substantial number of WC1- and WC1+ γδ T cells in PBMC that do not decrease with animal age after 6 months; both populations respond to bacterial antigens as naïve cells but in these cultures only the WC1- γδ cells produc IL-17 and IFNγ .

UI MeSH Term Description Entries
D007371 Interferon-gamma The major interferon produced by mitogenically or antigenically stimulated LYMPHOCYTES. It is structurally different from TYPE I INTERFERON and its major activity is immunoregulation. It has been implicated in the expression of CLASS II HISTOCOMPATIBILITY ANTIGENS in cells that do not normally produce them, leading to AUTOIMMUNE DISEASES. Interferon Type II,Interferon, Immune,gamma-Interferon,Interferon, gamma,Type II Interferon,Immune Interferon,Interferon, Type II
D008297 Male Males
D008562 Membrane Glycoproteins Glycoproteins found on the membrane or surface of cells. Cell Surface Glycoproteins,Surface Glycoproteins,Cell Surface Glycoprotein,Membrane Glycoprotein,Surface Glycoprotein,Glycoprotein, Cell Surface,Glycoprotein, Membrane,Glycoprotein, Surface,Glycoproteins, Cell Surface,Glycoproteins, Membrane,Glycoproteins, Surface,Surface Glycoprotein, Cell,Surface Glycoproteins, Cell
D005260 Female Females
D006041 Goats Any of numerous agile, hollow-horned RUMINANTS of the genus Capra, in the family Bovidae, closely related to the SHEEP. Capra,Capras,Goat
D000075942 Intraepithelial Lymphocytes T Lymphocytes with limited diversity of receptors (e.g., ALPHA E INTEGRINS) in the epidermis of the skin and the mucosal linings. They recognize common microbes via T-CELL RECEPTORS and PATHOGEN-ASSOCIATED MOLECULAR PATTERN MOLECULES and function as effector cells for INNATE IMMUNITY. Activation of intraepithelial lymphocytes is a marker for various gastrointestinal diseases (e.g., CELIAC DISEASE; HAIRY CELL LEUKEMIA; and ENTEROPATHY-ASSOCIATED T-CELL LYMPHOMA). Dendritic Epithelial T Cell,Gamma Delta T Cell,Gamma Delta T Lymphocyte,Intraepithelial Lymphocyte,Intraepithelial T Cell,Intraepithelial T Lymphocyte,Mucosal T Cell,Mucosal T Lymphocyte,Dendritic Epithelial T Cells,Gamma Delta T Cells,Gamma Delta T Lymphocytes,Intraepithelial T Cells,Intraepithelial T Lymphocytes,Mucosal T Cells,Mucosal T Lymphocytes,Lymphocyte, Intraepithelial,Lymphocytes, Intraepithelial,T Cell, Intraepithelial,T Cell, Mucosal,T Cells, Intraepithelial,T Cells, Mucosal,T Lymphocyte, Intraepithelial,T Lymphocyte, Mucosal,T Lymphocytes, Intraepithelial,T Lymphocytes, Mucosal
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000954 Antigens, Surface Antigens on surfaces of cells, including infectious or foreign cells or viruses. They are usually protein-containing groups on cell membranes or walls and may be isolated. Cell Surface Antigens,Surface Antigens,Surface Markers, Immunological,Cell Surface Antigen,Immunologic Surface Markers,Markers, Immunological Surface,Surface Antigen,Surface Markers, Immunologic,Antigen, Cell Surface,Antigen, Surface,Antigens, Cell Surface,Immunological Surface Markers,Markers, Immunologic Surface,Surface Antigen, Cell,Surface Antigens, Cell
D020381 Interleukin-17 A proinflammatory cytokine produced primarily by T-LYMPHOCYTES or their precursors. Several subtypes of interleukin-17 have been identified, each of which is a product of a unique gene. IL-17,CTLA-8,CTLA8,Cytokine CX2,Cytokine ML-1,Cytotoxic T lymphocyte-Associated Antigen 8,IL-17A,IL-17B,IL-17C,IL-17E,IL-17F,Interleukin 17,Interleukin-17A,Interleukin-17B,Interleukin-17C,Interleukin-17E,Interleukin-17F,Interleukin-25,CX2, Cytokine,Cytokine ML 1,Cytotoxic T lymphocyte Associated Antigen 8,IL 17E,Interleukin 17A,Interleukin 17B,Interleukin 17C,Interleukin 17E,Interleukin 17F,Interleukin 25

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