Inositol 1,4,5-trisphosphate induces aggregation and release of 5-hydroxytryptamine from saponin-permeabilized human platelets.
J Biol Chem
; 261(12): 5368-72, 1986 Apr 25.
Article
en En
| MEDLINE
| ID: mdl-3082884
Inositol 1,4,5-trisphosphate induces aggregation and the release of [3H]5-hydroxytryptamine from human platelets rendered permeable with saponin. This action of inositol 1,4,5-trisphosphate is associated with a significant formation of thromboxane B2, activation of phospholipase C, and phosphorylation of 20,000- and 40,000-dalton proteins, which are the substrates for myosin light chain kinase and protein kinase C, respectively. All of these responses are blocked by the cyclooxygenase inhibitors indomethacin and aspirin and the dual cyclooxygenase and lipoxygenase inhibitor 3-amino-1-[m-(trifluoromethyl)phenyl]-2-pyrazoline (BW 755C). These data indicate that platelet activation by inositol 1,4,5-trisphosphate is initiated by the mobilization of Ca2+, which leads to phospholipase A2 activation. The thromboxanes and endoperoxides that are subsequently generated then induce activation via cell surface receptors.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Saponinas
/
Fosfatos de Azúcar
/
Plaquetas
/
Serotonina
/
Agregación Plaquetaria
/
Fosfatos de Inositol
Límite:
Humans
Idioma:
En
Revista:
J Biol Chem
Año:
1986
Tipo del documento:
Article
Pais de publicación:
Estados Unidos