Trypsin inhibitor, isolated from Ascaris suum tegument reduces in vitro proteolytic activity (pH 7) of lungs and kidneys post-nuclear fractions of guinea pigs with larval ascariosis, pigs after subcutaneous ascarid homogenate administration as well as the activity in control groups. The comparative analysis of effect curves of trypsin inhibitor on the organ proteases revealed stronger reduction of the activity of post-nuclear lung proteases in ascariosis and of kidneys proteases after the injection of Ascaris homogenate than the inhibition of the fractions activity from respective control groups.
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