Inhibition of chemiluminescence by carvedilol in the cell‐free system, whole human blood and blood cells
| Autor: | Antonín Lojek, Fábryova, Milan Číž, Katarína Drábiková, Viera Jančinová, Radomír Nosál |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Blood Platelets Male Radical Clinical Biochemistry Carbazoles Pharmacology law.invention Propanolamines chemistry.chemical_compound law Cell Line Tumor Leukocytes medicine Humans Enzyme Inhibitors Hydrogen peroxide Carvedilol Peroxidase Chemiluminescence Whole blood chemistry.chemical_classification Reactive oxygen species Blood Cells Cell-Free System biology General Medicine Middle Aged Kinetics chemistry Biochemistry Myeloperoxidase Luminescent Measurements biology.protein Hydroxyl radical Reactive Oxygen Species medicine.drug |
| Zdroj: | Scandinavian Journal of Clinical and Laboratory Investigation. 65:55-64 |
| ISSN: | 1502-7686 0036-5513 |
| Popis: | Carvedilol inhibits luminol-enhanced chemiluminescence of reactive oxygen metabolites in vitro. In this study it was found that, in the cell-free system, carvedilol dose-dependently decreased chemiluminescence in the following ranking order of radicals: hydroxyl radicalhydrogen peroxidesuperoxide radical. The inhibition of myeloperoxidase was significant with carvedilol concentrations of 10 and 100 micromol/l and manifested in the concentration-dependent shift of chemiluminescence peaks to the right. In whole blood, carvedilol in concentrations of 10 and 100 micromol/l significantly inhibited chemiluminescence induced by both receptor-bypassing stimuli (A23187, PMA) and receptor-operating stimuli (fMLP, OpZ). Carvedilol dose-dependently inhibited chemiluminescence of isolated human polymorphonuclear leucocytes in the ranking order of stimuli: A23187OpZfMLP. In the presence of blood platelets, carvedilol did not substantially change chemiluminescence induced by fMLP and OpZ, while it was much more effective on chemiluminescence stimulated with calcium ionophore A23187. This could be the result of the supportive effect of serotonin liberated from platelets by A23187. |
| Databáze: | OpenAIRE |
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