title: Regulatory T-cell function in primary humoral immunodeficiency states.
abstract: The function of B cells and highly purified T-cell subpopulations was studied in patients with various primary humoral immunodeficiencies. In the presence of normal T4+ cells B cells of the patients with X-linked agammaglobulinemia (XLA) were not capable either for IgM or IgG synthesis, whereas B cells of the patient with hyper-IgM syndrome and three of eight patients with common variable immunodeficiency (CVI) could produce normal amounts of IgM, but not IgG. All patients with XLA and the patient with hyper-IgM syndrome exhibited normal helper function by T4+ cells for both IgG and IgM synthesis of normal B cells. The function of CVI T4+ cells was variable. When the function of the patients' T8+ cells was tested against normal B cells, one CVI patient had overactive suppression capacity; in other patients the suppressor cell activity was normal. The findings indicate considerable heterogenicity in the function of lymphocyte subpopulations of the CVI patients.
authors.affiliation: Department of Medical Microbiology, University of Turku, Finland.
authors.forename: J
authors.initials: J
authors.lastname: Eskola
authors.forename: E
authors.initials: E
authors.lastname: Savilahti
authors.forename: J
authors.initials: J
authors.lastname: Nikoskelainen
authors.forename: O
authors.initials: O
authors.lastname: Ruuskanen
mesh_terms: D000293:Adolescent; D000328:Adult; D000361:Agammaglobulinemia / Q000235:genetics / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D006942:Hypergammaglobulinemia / Q000276:immunology; D007075:Immunoglobulin M / Q000096:biosynthesis; D007136:Immunoglobulins / Q000096:biosynthesis; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D008213:Lymphocyte Activation; D008875:Middle Aged; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*
chemical_list: D007075:Immunoglobulin M; D007136:Immunoglobulins