Variations of brain enzymatic activities in experimental atherosclerosis.
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Biomedical subjects
Publications and source records attributed to F Aporti.
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During aging, male Sprague-Dawley rats display increasing frequency of bursts of seizure-like EEG patterns. They also have a decreased retention of passive avoidance response and a loss of spontaneous alternation in a Y maze. A study was made on the effects of chronic administration of phosphatidylserine in aged rats. It was found that BC-PS reduced by 65% the number of seizures, and by 70% their duration. It also facilitated retention of passive avoidance and of spontaneous alteration behavior. These results suggest that phosphatidylserine can affect electrophysiological and behavioral parameters in aged rats probably by counteracting age-related biochemical changes.
This paper presents the results of an investigation into the possibility that gangliosides (brain cortex glycosphingolipids) are capable of being functionally incorporated into cell membranes and of interfering with enzymatic activity of the ATPase system on the stria vascularis and spiral ligament in the guinea pig. Labelled gangliosides (3H-GM1) were incorporated into the cell membranes of the tissues under examination. (Na+, K+)ATPase activity increased l0 minutes after intravenous injection of gangliosides and prevented the decrease in (Na+, K+)ATPase system produced by ethacrynic acid. The action of gangliosides on the (Na+, K+)ATPase system is discussed.
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