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J Appl Physiol 41: 871-877, 1976;
8750-7587/76 $5.00
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Journal of Applied Physiology, Vol 41, Issue 6 871-877, Copyright © 1976 by American Physiological Society

ARTICLES

Carbohydrate metabolism of heat-acclimated hamsters. V. Control of gluconeogenesis

R. Chayoth

The rate of gluconeogenesis was similar in liver of both fed heat-acclimated and control hamsters. Twenty-four hours of fasting calsed 6 times elevation in hepatic gluconeogenesis of the control animals whereas only 4 times enhancement of this pathway was found in heat-acclimated animals. Thus, significant difference existed between the two experimental groups in fasting. Triiodothyronine stimulated the rate of gluconeogenesis only in fed heat-acclimated hamsters whereas dibutyryl cyclic AMP caused elevation of this pathway in liver slices of fed control hamsters only. The results suggest that a decrease in hepatic gluconeogenesis in heat acclimation occurs only in fasted animals and it is controlled by thyroid hormones.




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