Abnormal patterns of equine leucocyte ...
|Title||Abnormal patterns of equine leucocyte differentiation antigen expression in severe combined immunodeficiency foals suggests the phenotype of normal equine natural killer cells|
|Author(s)||D. Lunn, J. McClure, C. Schobert, M. Holmes|
|Abstract||Severe combined immunodeficiency (SCID) is a fatal autosommal disease of Arabian horses that leads to failure of maturation of T- and B-lymphocyte populations, although natural killer (NK) cells are unaffected. Thymic and lymph node tissues from two foals suffering from SCID were examined in an immunohistological study using a panel of monoclonal antibodies recognising equine leucocyte differentiation antigens. In both foals, the majority of cells in lymphoid tissues had an EqCD3-EqCD4-EqCD8+ phenotype, although rare EqCD3+ cells were also detected. The EqCD3-EqCD4-EqCD8+ cells may represent an abnormal lymphocyte differentiation product resulting from the SCID defect, or alternatively may be a normal equine NK cell population. We suggest that the evidence favours the latter proposal, and that equine NK cells in normal horses therefore may be identified by an EqCD3-EqCD8+ phenotype. The implications for the nature of the equine SCID defect are discussed.|
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