Ca(2+)-dependent production of reactive oxygen metabolites by human neutrophils in response to fluorinated propranolol analogues.
Biochem Pharmacol
; 61(5): 517-25, 2001 Mar 01.
Article
en En
| MEDLINE
| ID: mdl-11239494
Fluorinated analogues of propranolol, namely trifluoroethyl propranolol (F3), pentafluoropropyl propranolol (F5), and heptafluorobutyl propranolol (F7), were found to induce reactive oxygen metabolite (ROM) production in human neutrophils in a dose-dependent manner. Preincubation of neutrophils with the calcium chelator BAPTA-AM or the tyrosine kinase inhibitor genistein inhibited this ROM production. Direct measurements of intracellular calcium revealed that these analogues caused a transient increase in intracellular calcium. In addition, these fluorinated analogues of propranolol caused a transient increase in actin polymerization. The effects of these compounds were found to be dependent upon the degree of fluorination of the parent compound. Propranolol, on the other hand, had no direct effect on ROM, calcium, or actin polymerization when added alone to neutrophils, although it did modify responses of cells to various stimuli. Whereas ROM production induced by the chemotactic peptide formyl-methionyl-leucyl-phenylalanine was enhanced in a dose-dependent manner, the response to the particulate stimulus, latex beads, was abolished.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Propranolol
/
Calcio
/
Especies Reactivas de Oxígeno
/
Neutrófilos
Límite:
Humans
Idioma:
En
Revista:
Biochem Pharmacol
Año:
2001
Tipo del documento:
Article
País de afiliación:
Arabia Saudita
Pais de publicación:
Reino Unido