title: Abnormal lymphocyte populations in pure red cell aplasia.
abstract: Studies of blood lymphocytes from 4 patients with pure red cell aplasia were performed with lymphocyte surface markers, and with various in vitro tests for lymphocyte functions. Pathologically low B-lymphocyte values were found. In contrast, no marked deviation from normals were seen for T-lymphocytes and Fc-receptor-bearing lymphocytes thought largely to represent non-B, non-T-lymphocytes. In 3 patients normal lymphocyte transformation was found with unspecific and specific mitogens, while the DNA-synthesis induced by unspecific mitogens was subnormal in the fourth patients. The lymphocyte-mediated PHA-induced cytotoxicity against target cells in vitro was subnormal in 2 patients, while no depression was seen in antibody-dependent cytotoxicity mediated in vitro by lymphocytes (K-cells). It is concluded that considerable immunological abnormalities are associated with pure red cell aplasia, and the possible significance of this is discussed.
mesh_terms: D000328:Adult; D000741:Anemia, Aplastic / Q000097:blood / Q000276:immunology*; D001323:Autoantibodies / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D007141:Immunoglobulin Fc Fragments / Q000032:analysis; D037102:Lectins / Q000494:pharmacology; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D008875:Middle Aged; D008934:Mitogens / Q000494:pharmacology; D011947:Receptors, Antigen, B-Cell / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology; D013945:Thymoma / Q000097:blood / Q000276:immunology
chemical_list: D001323:Autoantibodies; D007141:Immunoglobulin Fc Fragments; D037102:Lectins; D008934:Mitogens; D011947:Receptors, Antigen, B-Cell