Superoxide anions enhance platelet adhesion and aggregation.

Abstract:

:1. Superoxide dismutase (SOD, 60 u ml-1) or ferricytochrome c (70 microM) significantly inhibited thrombin-stimulated platelet adhesion to gelatin-coated plastic, whereas catalase (1000 u ml-1) or mannitol (1 mM) had no effect. 2. The platelet aggregation induced by low concentrations of thrombin (causing less than 45% maximal change in light transmission) was inhibited by SOD. Catalase or mannitol had no effect on platelet aggregation. 3. Pyrogallol (an O2- generator) enhanced both platelet adhesion to gelatin-coated plastic and platelet aggregation induced by thrombin; this enhancement was neutralized by SOD. 4. These results indicate that O2- increase both platelet adhesion and aggregation, whereas other free radicals such as hydrogen peroxide or hydroxyl radicals are not involved.

journal_name

Br J Pharmacol

authors

Salvemini D,de Nucci G,Sneddon JM,Vane JR

doi

10.1111/j.1476-5381.1989.tb12572.x

subject

Has Abstract

pub_date

1989-08-01 00:00:00

pages

1145-50

issue

4

eissn

0007-1188

issn

1476-5381

journal_volume

97

pub_type

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