Effect of oestriol on platelet adhesiveness and fibrinolysis in men.
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Biomedical subjects
Publications and source records attributed to D Ogston.
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Plasma fibrinolytic activity, inhibitors of fibrinolysis, and fibrinogen were estimated in 34 subjects of varying ratio of observed to standard weight. The inverse relationship between fibrinolytic activity and the ratio of observed to standard weight was confirmed. No significant correlation was found between anti-plasmin or anti-urokinase and the ratio of observed to standard weight. It was therefore concluded that the decreased plasma fibrinolytic activity in obese subjects is due to decreased production of plasminogen activator rather than to excessive inhibition.
Plasma fibrinogen and plasminogen levels were measured in 122 male and 56 female healthy adult subjects and in 64 men with ischaemic heart disease. Plasma fibrinogen levels were found to rise markedly and progressively with age in both male and female healthy subjects; plasminogen showed only a slight rise with age. No sex differences were found for either fibrinogen or plasminogen. The correlation between plasminogen and fibrinogen levels was low, reaching the 5% level of significance only in men. Patients with ischaemic heart disease were found to have significantly increased fibrinogen and plasminogen levels in the 31-45 years age group only.
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The administration of ascorbic acid (1g/day) to healthy adults did not significantly influence the levels of serum cholesterol, plasminogen activator activity, plasminogen, fibrinogen, FR-antigen, partial thromboplastin time, platelet adhesiveness, a-1-antitrypsin or a-2-macroglobulin over the 3-month period of study.
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