| Popis: |
The aim of the study was to establish the role of some neuroendocrine mediators (agonists and antagonists of β-adrenergic receptors, progesterone) in regulating T-cells activity. Studies conducted on the culture of leukemiatransformed T-cells (Jurkat cells) (DSMZ-Deutshe Sammulung von Mikroorganismen und Zellkulturen (Germany)). Jurkat Cells (4 x 105 cells/ml) stimulated with 50 µg/ml fitogemaglutinin A (PHA) at 370С for 5 minutes and then incubated for 24 hours alone, or together with β- adrenergic receptors agonist izopretonolom (at dose of 10-5 M, 10-6 M), an antagonist, propranolol (dose of 10-5 M, 10-6 M) and progesterone (dose 0,07 µl, 0,7 µl) added to the incubation medium. The viability of Jurkat cells was determined by MTT test. It was shown that β-adlenoretseptors agonist, izoprotenol didn't affect the activity of mitochondrial dehydrogenases in intact and contributed to their low activation (12%) in the mitogen-activated Jurkat cells. β-adrenergic receptors antagonist, propranolol, promotes a significant reduction in activity of mitochondrial dehydrogenases, and hence the viability of both intact (40-60%) and mitogen stimulated Jurkat cells (20-40%). Viability of intact Jurkat cells didn't change, and dose-dependently increased in PHA-stimulated Jurkat cells during progesterone exposure. It was concluded that viability of the T-cells and hence their functional activity is largely sensitive to the influence of the β-adrenoceptor antagonists and progesterone. These data should be considered in the clinical application of appropriate drugs. |
