[Ultracytochemical research on the different ATPases and alkaline phosphatase of the vascular plexuses of the rat brain in aging].

The ultracytochemical investigation of the localization of Mg(2+)-ATPase, Na+, K(+)-ATPase (ouabain-sensitive potassium-dependent p-nitrophenylphosphatase component of Na+, K(+)-ATPase complex), Ca(2+)-ATPase and alkaline phosphatase activities in choroid plexus of the adult and old rat brain ventricles has shown the age-related decrease in intensity of the enzymatic reactions. This can influence the character of liquor production, as well as metabolic, regulatory and transport processes in the blood-liquor barrier in aging. The most typical areas of enzymes activity localization have been established, which are zones of the greatest functional significance.