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  • Title: [Non-enzymatic fibrinolytic agents].
    Author: Nilsson IM, Hedner U.
    Journal: Ann Anesthesiol Fr; 1978; 19(8):697-702. PubMed ID: 31113.
    Abstract:
    Non-enzyme fibrinolytic agents include pharmacological agents which are active in vivo but inactive in vitro and synthetic chemical compounds which when added to blood or plasma in vitro directly induce fibrinolysis. There are a number of drugs with a short duration of action such as adrenalin, nicotinic acid, vasopressin and histamine. Vasoactive drugs probably act by stimulating the liberation of vascular activator. The effect of nicotinic acid is rapidly exhausted when injections are repeated. By contrast, the biguanides and certain anabolic steroids are capable of exerting a long term stimulation of endogenous fibrinolysis. Amongst these substances, phenformin, metformin, ethyloestrenol, stanozolol and a new substance, moroxydine chloride, have been studied. The biguanides appear to be capable of exerting an effect upon the synthesis and liberation of plasminogen vascular activator. The combination of an anabolic steroid and a biguanide would appear to be the most powerful. These various drugs have been used with success in cases of recurrent venous thrombosis in patients with an abnormally low level of plasminogen activator in the venous walls and/or low fibrinolytic activity after venous stasis. Chemical fibrinolytic agents were studied only in vitro, since the use of these substances in human therapeutics would seem to be still difficult in view of the fact that they are active only in a narrow range of concentrations.
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