[Comparative study of energy metabolism in the liver and skeletal muscles of rat and rabbit. Effect of starvation].
The steady state concentration of carbohydrate and adenosine phosphate metabolites in rat and rabbit liver and in rabbit skeletal muscle and oxidative phosphorylation parameters of rat and rabbit liver mitochondria were compared. The effects of 24 hr starvation on the energy metabolism of liver and skeletal muscle of the animals were investigated. The steady state concentrations of glycogen and phosphoenolpyruvate in normal rabbit liver were found to be much lower than in the rat and other mammalian livers (45.7 mumoles of glucose equivalents and 38 nmoles of PEP per 1 g of liver wet mass, respectively). On the contrast, the concentrations of glucose 6-phosphate, pyruvate and Pi in rabbit skeletal muscle were unusually high (up to 3, 1 and 15 mumoles per 1 g, respectively). In terms of glucose, pyruvate, lactate, Pi, adenine nucleotide contents and cytosolic NAD+/NADH ratio in the liver, and glycogen, glucose, lactate, creatine and adenosine phosphates in skeletal muscle and oxidative and phosphorylated properties of isolated liver mitochondria, no significant differences between rat and rabbit were found. During 24 hr starvation gluconeogenesis in rabbit liver occurred earlier and was more intensive than in rat liver. This is indicative of the existence of interspecies differences in the control mechanisms of carbohydrate and phosphorus metabolism.
D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D004734:Energy Metabolism; D008099:Liver / Q000378:metabolism*; D008297:Male; D008930:Mitochondria, Liver / Q000378:metabolism; D009132:Muscles / Q000378:metabolism*; D009243:NAD / Q000378:metabolism; D009928:Organ Specificity; D010084:Oxidation-Reduction; D011817:Rabbits; D051381:Rats; D013045:Species Specificity; D013217:Starvation
D009243:NAD; D000255:Adenosine Triphosphate
Sravnitel'noe issledovanie énergeticheskogo obmena v pecheni i skeletnoĭ myshtse krysy i krolika. Vliianie golodaniia.