Title : Phosphatidylinositol 4,5-bisphosphate may represent the site of release of plasma membrane-bound calcium upon stimulation of human platelets.

Pub. Date : 1984 Apr 16

PMID : 6324792






4 Functional Relationships(s)
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1 Thrombin stimulation of human blood platelets caused an extensive (up to 45%) and rapid (5-10 s) decline in endogenous phosphatidylinositol 4,5-bisphosphate (PI-P2). Phosphatidylinositol 4,5-Diphosphate coagulation factor II, thrombin Homo sapiens
2 Thrombin stimulation of human blood platelets caused an extensive (up to 45%) and rapid (5-10 s) decline in endogenous phosphatidylinositol 4,5-bisphosphate (PI-P2). Phosphatidylinositol 4,5-Diphosphate coagulation factor II, thrombin Homo sapiens
3 Thrombin-induced decreases in PI-P2 content could account for release of sufficient membrane-bound Ca to raise cytoplasmic free [Ca2+] to 1-2 microM, supporting the hypothesis that PI-P2 represents the Ca-binding site involved in the stimulus-dependent increase in cytoplasmic Ca2+ evoked by receptor-ligand interactions. Phosphatidylinositol 4,5-Diphosphate coagulation factor II, thrombin Homo sapiens
4 Thrombin-induced decreases in PI-P2 content could account for release of sufficient membrane-bound Ca to raise cytoplasmic free [Ca2+] to 1-2 microM, supporting the hypothesis that PI-P2 represents the Ca-binding site involved in the stimulus-dependent increase in cytoplasmic Ca2+ evoked by receptor-ligand interactions. Phosphatidylinositol 4,5-Diphosphate coagulation factor II, thrombin Homo sapiens