title: The role of TG lymphocytes in cell-mediated immunity in patients with periodontal disease.
abstract: Blood mononuclear cell suspensions from patients with a severe form of periodontal disease failed to respond by in vitro stimulation to a sonicate from the oral bacterium, Veillonella alcalescens. The proliferative response could be restored by the depletion of TG cells by rosetting with IgG-coated ox erythrocytes and by reconstitution of the cell suspension with 10% plastic-adherent monocytes. Small but statistically significant restoration of the Veillonella response was also achieved by the addition of indomethacin or mefenamic acid to unfractionated cell cultures, indicating only a minor role of prostaglandin (PG) synthesis in the expression of suppressor cells. Since the in vitro response to an unrelated antigen PPD had been found unimpaired, the described TG-cell-mediated suppression of the Veillonella response is apparently antigen-specific.
mesh_terms: D000328:Adult; D005260:Female; D005891:Gingivitis / Q000276:immunology; D006801:Humans; D007111:Immunity, Cellular; D007074:Immunoglobulin G / Q000276:immunology; D007213:Indomethacin / Q000494:pharmacology; D008213:Lymphocyte Activation / Q000187:drug effects; D008297:Male; D008528:Mefenamic Acid / Q000494:pharmacology; D008875:Middle Aged; D010518:Periodontitis / Q000276:immunology*; D011961:Receptors, Fc / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology*; D014678:Veillonella / Q000276:immunology
chemical_list: D007074:Immunoglobulin G; D011961:Receptors, Fc; D008528:Mefenamic Acid; D007213:Indomethacin