β2-adrenergic regulation of T lymphocites function (in vitro study)

The aim of our study was to establish the influence of β2AR agonists and antagonists on Th1/Th2 subpopulation balance in intact and activated CD4+ T lymphocyte. Jurkat leukemic T cell line was used as a model for studying T cell activation conditions under the influence of β2AR ligands. As follows from the results of our studies, after the influence of β2AR agonist isoproterenol on intact Jurkat cells expression of IL-2 was not changed in comparison to control level. Under the PHA-stimulation level of IL-2 production in Jurkat cells increased significantly; isoproterenol caused decrease level of IL-2 expression in the PHA-stimulated Jurkat cells. Adding of β2AR antagonist propranolol to the Jurkat cells pre-incubated with isoproterenol didn't change expression of IL-2. β2AR antagonist propranolol induced slight increase of IL-2 expression in PHA-stimulated Jurkat cells pre-incubated with isoproterenol. Neither isoproterenol nor propranolol didn't change intensity of IL-10 expression in intact Jurkat cells. In the PHA-stimulated Jurkat cells level of IL-10 production decreased in comparison to control level. Isoproterenol induced sharp intensification of IL-10 expression in these cells. Propranolol prevented increase of IL-10 expression in the PHA-stimulated Jurkat cells pre-incubated with β2AR agonist. It was concluded that β2ARs in dose-dependent manner regulate cytokine profile in intact and mitogen activated CD4+ T lymphocyte and by this way induce dose-dependent alterations of lymphocyte proliferation and immune response. This indicated existence of a link among immune response and sympathetic nervous system activity.