title: T cell subpopulations and their functions in vitro. A study in patients with alopecia areata and alopecia universalis.
abstract: T lymphocyte subpopulations and their in vitro activities were determined in patients with alopecia areata (AA) and alopecia universalis (AU). The frequencies of T cells with receptors for IgG and T cells with receptors for IgM were determined in 16 cases. The IgG and IgM production of B lymphocytes cocultured with autologous and allogeneic T lymphocytes in the presence of PWM was determined in 12 and 9 cases, respectively, and the antibody-dependent cell-mediated cytotoxicity (ADCC) of unfractionated lymphocytes was examined in 6 cases. Patients with AA and AU had a higher proportion of Tg cells and more pronounced ADCC of unfractionated peripheral lymphocytes than normal persons. Furthermore, PWM-induced Ig production of B lymphocytes in the presence of autologous T lymphocytes seemed to be lower than that of controls.
mesh_terms: D000328:Adult; D000506:Alopecia Areata / Q000276:immunology*; D000920:Antibody-Dependent Cell Cytotoxicity; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D008297:Male; D008875:Middle Aged; D009439:Neuraminidase / Q000494:pharmacology; D011043:Pokeweed Mitogens / Q000494:pharmacology; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000145:classification* / Q000276:immunology
chemical_list: D007074:Immunoglobulin G; D007075:Immunoglobulin M; D011043:Pokeweed Mitogens; D009439:Neuraminidase