[Enzymes of the oral mucosa in rats with protein deficiency].
In rats receiving a protein-poor diet for 60 days (4% caloric share of casein) the activity of beta-galactosidase, beta-N-acetyl glucose aminidase, acid proteinases, acid phosphatase, acetyl estherase, catalase, glutathione reductase, monoamine oxidase (MAO), glucose-6-phosphate dehydrogenase, and the content of malonic dialdehyde (MDA) were measured in the oral cavity mucosa. The authors observed the significant increase in MAO activity, and decrease in activities of beta-N-acetyl glucose aminidase, acetyl estherase, catalase, glutathione reductase, increased MDA contents. The changes in enzymatic activities had, to a several extent, an adaptive nature and were related to their reduced biosynthesis.