Energy metabolism in kidney of heat-acclimated hamsters.
Biochemical pathways which are involved in energy metabolism were examined in the kidney of heat-acclimated hamsters. It was found that heat acclimation caused 47% reduction in glucose-6-phosphatase (G1c-6-Pase) activity and 40% lower rate of gluconeogenesis. No changes were found in the activity of hexokinase, glucose-6-phosphate dehydrogenase, pyruvate kinase, lactic dehydrogenase, or in kidney glycogen content. Isolated kidney mitochondria of heat-acclimated hamsters utilized 15% less oxygen than that of controls, but no differences were found in the P/O ratio. Determination of the content of some cytochromes showed a significant reduction in cytochromes c + c1, but no difference was found in the content of cytochromes a, a3, and b. These results suggest that the kidney plays a role in the reduction of energy metabolism during the process of heat acclimation.
D000064:Acclimatization; D000818:Animals; D006224:Cricetinae; D003580:Cytochromes / Q000032:analysis; D004734:Energy Metabolism; D005943:Gluconeogenesis; D006358:Hot Temperature; D007668:Kidney / Q000201:enzymology / Q000378:metabolism* / Q000648:ultrastructure; D008297:Male; D008928:Mitochondria / Q000378:metabolism; D010085:Oxidative Phosphorylation; D010101:Oxygen Consumption
D003580:Cytochromes