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Thromb Haemost 1983; 49(03): 173-175
DOI: 10.1055/s-0038-1657355
Original Article
Schattauer GmbH Stuttgart

The Effect of Serotonin Inhibition on Initial Microvessel Hemostasis and Platelet Aggregation In Vivo

D Bergqvist
The Departments of Surgery and Experimental Research, Malmö General Hospital, Malmö and Department of Experimental Medicine, Pharmacia AB, Uppsala, Sweden
,
S Arvidsson
The Departments of Surgery and Experimental Research, Malmö General Hospital, Malmö and Department of Experimental Medicine, Pharmacia AB, Uppsala, Sweden
,
C O Esquivel
The Departments of Surgery and Experimental Research, Malmö General Hospital, Malmö and Department of Experimental Medicine, Pharmacia AB, Uppsala, Sweden
,
B Lindblad
The Departments of Surgery and Experimental Research, Malmö General Hospital, Malmö and Department of Experimental Medicine, Pharmacia AB, Uppsala, Sweden
,
U Haglund
The Departments of Surgery and Experimental Research, Malmö General Hospital, Malmö and Department of Experimental Medicine, Pharmacia AB, Uppsala, Sweden
› Author Affiliations
Further Information

Publication History

Received 14 January 1983

Accepted 17 March 1983

Publication Date:
18 July 2018 (online)

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Summary

The role of serotonin (5-HT) in initial microvascular hemostasis is not fully understood. This study was made to evaluate the effect on hemostatic plug formation and laser-induced arteriolar microembolism of different substances which counteract the effect of 5-HT. Hemostatic plug formation time and stability was measured in the rabbit mesenteric microcirculation and laserinduced embolism in the rabbit ear chamber. Ketanserine, a selective 5-HT2-receptor blocker shortened arteriolar hemostatic plug formation time. Dihydroergotamine, an unselective blocker (with 5-HT- and α-adrenergic receptor affinity) increased venular hemostatic plug formation time and also decreased the hemostatic plug stability. Laser-induced platelet embolism was unaltered after both ketanserine and dihydroergotamine administration. The magnitude of these changes seems to exclude an important effect of 5-HT in initial microvessel hemostasis or on platelet activity.

Keywords

Rabbits - Hemostatic plug - Platelet - Ketanserine - Dihydro - ergotamine
 

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