title: Detection of IL-2 receptor positive tonsillar lymphocytes by monoclonal antibody and protein A coated erythrocytes.
abstract: A sensitive rosette method combining staphylococcal protein A coated rabbit red blood cells and the monoclonal antibody anti-Tac was used to search for the presence of interleukin 2 (IL-2) receptor-bearing T lymphocytes in tonsils from patients with chronic tonsillitis. This method revealed the presence of Tac positive T lymphocytes in the tonsils whereas a conventional immunofluorescence technique was unable to do so. To demonstrate that Tac rosette formation resulted in a selective enrichment of IL-2 receptor-bearing T cells, we measured the proliferative response of these cells to exogenous IL-2. The response of Tac rosette positive cells to recombinant IL-2 was always higher than that of the Tac rosette negative or unselected cells, indicating that this rosette method specifically selects T cells expressing IL-2 receptor.
mesh_terms: D000293:Adolescent; D000328:Adult; D000911:Antibodies, Monoclonal / Q000276:immunology*; D002648:Child; D004912:Erythrocytes / Q000276:immunology; D006801:Humans; D066298:In Vitro Techniques; D007376:Interleukin-2 / Q000276:immunology*; D014066:Palatine Tonsil / Q000166:cytology* / Q000276:immunology; D010835:Phytohemagglutinins / Q000494:pharmacology; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D011971:Receptors, Immunologic / Q000032:analysis*; D015375:Receptors, Interleukin-2; D012397:Rosette Formation; D013205:Staphylococcal Protein A / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D007376:Interleukin-2; D010835:Phytohemagglutinins; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2; D013205:Staphylococcal Protein A