Antifibrinolytic Activity in Middle Ear Effusion

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Abstract
No activity of the plasmin and plasminogen activators could be detected in middle ear effusion (MEE). A streptokinase proactivator, which was not plasminogen and markedly enhanced the activation of plasminogen by streptokinase, could be detected. MEE had an apparent inhibitory activity against both thiol protease (papain) and serine proteases (plasmin and trypsin). All these findings indicate that MEE contains unsaturated protease inhibitors and is in a state of predominance of inhibitors over fibrinolytic activity.

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