The influence of sunflower and olive oils and their combination with cholesterol on the activity of lysosomal hydrolases and lipid peroxidation (LPO) in the mucosa of the mouth and jejunum was studied. It was shown that in the presence of cholesterol in the oral mucosa the activity of N-acetylhexosaminidase increased and there was a tendency to decreasing cathepsin D and acetyl esterase activity, and LPO processes were found to be suppressed. Cathepsin D and B activities in the jejunum mucosa increased in response to cholesterol administration. The changes revealed in the activities of N-acetylhexosaminidase, proteinase, acetyl esterase, catalase and glutathione peroxidase in the oral mucosa, as well as cathepsins in the jejunum depend on the character of lipid additives.
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