各種環境下における脳内燐代謝 : 第3報 Mg-Adenosinetriphosphatase活性値ならびにAdenosinetriphosphate含有量の変動について

概要

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It has been previously reported that inorganic phosphate content decreased in the diencephalon and upper part of the mesencephalon of rabbit brain under conditions of noise. For this reason the present investigation was undertaken to observe the changes in the Mg-ATPase activities of rabbit brains and the ATP concentrations of rat brains under different physical conditions. The physical conditions used were similar to those of previous reports.The Mg-ATPase activity was determined by MARION-GORES method, and the ATP concentration was measured by BOERINGERS reagent.The following results were obtained:1. In the control group. Mg-ATPase activities of the telencephalon, upper part of the mesencephalon, and cerebellum were higher than that of the lower part of mesencephalon, pons and medulla oblongata.2. Under conditions of noise, Mg-ATPase activities of the telencephalon and the upper part of the mesencephalon decreased significantly, but this was not observed under conditions of cold or immobilization.3. The average value for ATP concentrations of rat brains in the control group was 0.849 mol/g (SE: ±0.081).4. ATP concentrations of rat brains increased significantly under conditions of noise but were not changed under conditions of cold or immobilization.
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