title: Cell-mediated immunodeficiency in Down's syndrome: normal IL-2 production but inverted ratio of T cell subsets.
abstract: To get more information on the mechanism of cell-mediated immunodeficiency associated with Down's syndrome, 18 patients were studied for PHA-induced lymphocyte transformation and interleukin-2 (IL-2) production. A normal amount of IL-2 was produced although half of the patients showed decreased blast transformation. T cell subpopulations were studied in some patients with decreased and with normal blast transformation. All studied patients with decreased blast transformation had inverted helper/suppressor T cell ratio.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000276:immunology*; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D007376:Interleukin-2 / Q000096:biosynthesis*; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D008297:Male; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D007376:Interleukin-2