title: Lymphocytes in patients with variable immunodeficiency and panhypogammaglobulinemia. Evaluation of B and T cell surface markers and a proposed classification.
abstract: Peripheral blood lymphocytes from 15 patients with variable immunodeficiency and severe panhypogammaglobulinemia were evaluated for B and T cell surface markers. B cells were enumerated by immunofluorescent detection of both surface immunoglobulin (Ig) and the ability to bind aggregated Ig complexes. T cells were identified by their ability to form nonimmune rosettes with sheep red blood cells. Four distinct patterns were observed which were designated types I-IV. Type I: six patients had normal percentages (8.5-19.0%) of Ig-bearing B lymphocytes. Type II: four patients were observed to have B lymphocytes (4.5-15.0%) which lacked fluorescence-detectable surface Ig. Type III: the peripheral blood of these four patients contained a subpopulation (11.3-20.0%) of lymphocytes which apparently lacked both B and T cell markers ("null" cells). Type IV: one patient's blood was characterized by a subpopulation (18.0-22.0%) of lymphocytes which bore both B and T cell markers. Patients of each type had some clinical features in common. It is concluded that evaluation of lymphocyte surface markers provides a means of separating patients with variable immunodeficiency and panhypogammaglobulinemia into distinct groups which appear to differ in the nature of their fundamental defect.
mesh_terms: D000293:Adolescent; D000328:Adult; D000361:Agammaglobulinemia / Q000097:blood / Q000145:classification / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D002462:Cell Membrane / Q000276:immunology*; D002473:Cell Wall; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007153:Immunologic Deficiency Syndromes / Q000097:blood / Q000145:classification / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D008722:Methods; D008875:Middle Aged; D011485:Protein Binding; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D007074:Immunoglobulin G