The in vitro anticoagulant action of proteases secreted by the micromycete Aspergillus ochraceus L-1 and contained in snakes’ venoms (Protac® and RVV-X® preparations) was studied. The severity of the action of micromycete protease in relation to plasmas of humans and warm-blooded animals, as well as human plasmas de cient in certain factors of the hemostasis system, in comparison with snake proteases in reactions with chromogenic peptide substrates of activated protein C and factor X, as well as using the activated partial thromboplastin time (APTT) test. The optimal time of preincubation of the micromycete A. ochraceus L-1 protease with human blood plasma (3 min) and the concentration of the chromogenic peptide substrate of activated protein C (from 0.1 to 0.5 mg/ml) necessary for the correct determination of protein C with her help.

No abstract