title: Development of a serologically complete IgA deficiency in a patient with common variable hypogammaglobulinemia.
abstract: A male with common variable hypogammaglobulinemia had subnormal but detectable IgA levels (0.2-0.4 g/l). During a period of 1 yr his serum IgA decreased below the detection level to less than 1/10(5) of the original concentration. Serum IgG and IgM were both low but remained constant during the follow-up time. In serum samples lacking IgA, anti-IgA antibodies of the IgG1 subclass were found. His B lymphocytes had a low but detectable capacity to secrete IgA in coculture experiments with purified T cells from healthy donors.
mesh_terms: D000361:Agammaglobulinemia / Q000235:genetics / Q000276:immunology*; D002872:Chromosome Deletion; D005796:Genes; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology*; D007127:Immunoglobulin Constant Regions / Q000235:genetics; D007137:Immunoglobulin alpha-Chains / Q000235:genetics; D008297:Male; D008875:Middle Aged; D013997:Time Factors
chemical_list: D007070:Immunoglobulin A; D007127:Immunoglobulin Constant Regions; D007137:Immunoglobulin alpha-Chains