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- W2883937716 abstract "PGI2,which increases platelet cAMP(Prostaglandins 13: 389,1977),is a potent inhibitor of aggregation and secretion .We stidued the time course of the same return of platelet function after exposure of platelets to PGI2.Sepharose 2B columns were equilibrated with Tyrode’s albumin buffer, pH7.5 (no Ca2+) containing PGI2 (534nM). Platelet rich plasma was applied and eluted with the same buffer. The filtered platelets(GFP) were then subsampled hourly after elution from the column. Fibrinogen was added to finel concentration of 1.7mg/ml. Platelet aggregation(PA) and release of 14C serotonin (5HT),platelet factor 4(PF4), and factor V (FV) were assayed after stimulation of the platelet by collagen(C), ADP,epinephrine(E), arachidonic acid(AA) and ionophore A23187(I). Data representative of 5 separate studies follow. I(20μg/ml) induced PA was 76%(Ohr),52%(1hr) and 61%(2hr and beyond). Release of 5HT, FV,and PF4 were 60%,1.89u,and 7.97 yg/10 pit, respectively, at time 0 and increased progressively, reaching a plateau at 2 hr. AA(500μg/ml) was 10%(0hr),30%(2hr),68%(3hr) and 8%(4hr). Release of 5HT paralleled PA but release of FV and PF4 remained suppressed for 4 hrs. In contrast α-granule (PF4 and FV)release by C(μg/ml)increased as PA increased while dense granule secretion remained suppressed. PA as well as a and dense granule secretion by ADP (10μM) were minimal during 4 hrs. PA and FV secretion by E (55μM) also remain inhibited for 4 hrs. In spite of this normal dense granule release occurred initially and declined progressively over 4 hours." @default.
- W2883937716 created "2018-08-03" @default.
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- W2883937716 date "1981-01-01" @default.
- W2883937716 modified "2023-09-27" @default.
- W2883937716 title "Effect Of Prostacyclin (PGI2) On Human Platelet Aggregation And Secretion" @default.
- W2883937716 doi "https://doi.org/10.1055/s-0038-1653271" @default.
- W2883937716 hasPublicationYear "1981" @default.
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