title: Effects of cyclosporin A on expression of IL-2 and IL-2 receptors in normal and multiple sclerosis patients.
abstract: The effects of the immunosuppressant Cyclosporin A (CsA) on T cell activation in vivo and in vitro were examined using the monoclonal antibody, anti-Tac, for interleukin 2 (IL-2) receptors and 3.9C2, for a peptide fragment of human IL-2. Peripheral blood lymphocytes (PBL) were stimulated with PHA in the presence of CsA. The expression of IL-2 receptors and production of IL-2 were reduced. PBL from CsA-treated MS patients had significantly lower proportions of Tac+ cells compared with untreated patients. This inhibition was not reflected in the CSF lymphocyte populations from CsA-treated patients and indicates the urgent need for an immunosuppressant drug which can enter the CNS in sufficient concentrations to inhibit local T cell activation.
mesh_terms: D003524:Cyclosporins / Q000494:pharmacology*; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis*; D008213:Lymphocyte Activation; D008297:Male; D009103:Multiple Sclerosis / Q000276:immunology*; D010835:Phytohemagglutinins / Q000494:pharmacology; D011971:Receptors, Immunologic / Q000032:analysis*; D015375:Receptors, Interleukin-2; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D003524:Cyclosporins; D007376:Interleukin-2; D010835:Phytohemagglutinins; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2