title: T-cell subpopulations defined with monoclonal antibodies in patients with primary immunodeficiency.
abstract: Peripheral blood mononuclear cells from 16 patients with common variable immunodeficiency and 4 with selective IgA deficiency were studied for the quantitative analysis of T-cells and T-cell subsets with distinct immunoregulatory properties, using a battery of monoclonal antibodies and the fluorescence-activated cell-sorter. The proportions of OKT4+ cells were decreased and OKT8+ cells were increased in patient groups when compared to normal controls analyzed simultaneously. 14/20 (70%) patients demonstrated a lower OKT4+/OKT8+ cell ratio compared to controls. Imbalance of immunoregulatory T-cells may explain one of the mechanisms of hypogammaglobulinemia in a subgroup of patients with primary immunodeficiency.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000276:immunology; D001402:B-Lymphocytes / Q000145:classification; D002452:Cell Count; D002648:Child; D004406:Dysgammaglobulinemia / Q000276:immunology; D005260:Female; D006801:Humans; D017098:IgA Deficiency; D007136:Immunoglobulins / Q000032:analysis; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D007694:Killer Cells, Natural / Q000145:classification; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000145:classification; D050378:T-Lymphocytes, Regulatory / Q000145:classification
chemical_list: D000911:Antibodies, Monoclonal; D007136:Immunoglobulins