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PubMed1977

[Enzymes of the pentose phosphate pathway in the brains of rats during long-term deprivation of the paradoxical stage of sleep].

The selective paradoxical sleep (PS) deprivation in rats entailed during first 2 days a drop in activity of glucose-6-phosphatehydrogenase by 80 and 60%, and of 6-phosphogluconatdehydrogenase -- by 20--35 and 40--50% in the brain-stem and the cortex, respectively. Activity of the transketolase decreased by 27--29% on the 2nd day of PS deprivation only. On the 4th day, normalizing of activity of all the enzymes under study except transketolase, was observed in both regions of the brain. The consumption of riboso-5-phosphate by the homogenate and level of phosphoketopentoses formation in it reflected, mainly, the dynamics of transketolase activity changes.

Animals↗
PubMedDate not supplied

[Relationship between glycolysis and pentose cycle intensity and thrombocyte aggregation induced by ADP in man].

Aggregation of thrombocytes, caused by ADP, affected the rate of anaerobic breakdown of carbohydrates due to inhibition of the glucose degradation, while the rate of lactate formation was not distinctly altered. Content of NAD was decreased simultaneously with an increase in content of NADP; the activity of glucose-6-phosphate dehydrogenase was distinctly increased but the unaltered activity of 6-phosphogluconate dehydrogenase was observed; content of reduced glutathione was increased 15-fold. The activity of NADP-dependent glutathione reductase was increased under effect of ADP; at the same time, the activity of NAD-dependent glutathione reductase did not depend on the diphosphate effect.

Adenosine Diphosphate↗