May 5, 1976

Drug-induced parkinsonism in the rat- a model for biochemical investigation of the parkinson-syndrome. III. The incorporation of D-glucose-14C(U) in amino acids of brain and liver from rats pretreated with reserpine or with phenothiazines

E GründigJ Weiss


Following treatment with reserpine or alternatively with a combination of phenothiazines (Randolektil, Majeptil) a drug-induced parkinsonoid reaction was provoked in rats. Twenty min before decapitation, 18 muCi d-glucose-14C(U) was administered intravenously. Concentration and radioactivities of glutamic acid (glu), glutamine (gln), serine (ser), and glycine (gly) were assayed in some regions of brain and in liver. Separation was performed by a combination of paper electrophoresis and chromatography or by an automatic amino acid analyzer. 1 After reserpine, the concentrations of serine and glycine were increased ten-fold while their specific activities decreased by the same factor. The interconversion serine-glycine was not affected. The concentration of glutamic acid was reduced while its specific activity remained constant. 2. After phenothiazines, the concentrations of serine and glycine in brain were also increased but their specific activities were decreased to a different degree. This indicates an additional effect on the serine-synthesis from glucose. The interconversion serine-glycine was also altered. The concentration of glutamic acid was decreased but specific activity was constant except in the thalamus region test...Continue Reading

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Mentioned in this Paper

Amino Acid Metabolism
Electrophoresis, Paper
Antipsychotic Effect
Glycine, Monopotasssium Salt
Amino Acids, I.V. solution additive
Catecholamines Measurement

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