[Study of the role of nicotinamide coenzymes in the regulation of glyceroneogenesis from pyruvate in rat epididymis fat tissue].

The paper deals with a regulatory effect of the redox state of nicotinamide coenzymes on glyceroneogenesis in the epididymal fatty tissues involving incorporation of [2-14C] pyruvate into synthetized de novo blood glucose, glycerol and fatty acids of triacyglycerines. Large values of the NAD+/NADH and NADP+/NADPH ratios in cytoplasm and mitochondria promote a high rate of lipogenesis and glucose oxidation processes, which is pronounced in a more intense 14C incorporation into fatty acids than in triacylglycerol glycerols. A decrease in the NAD+/NADH ratio and an increase in the reducing ability of NAD-pairs under fasting intensify glyceroneogenesis in the fatty tissue. The incorporation of [14C] pyruvate into blood glucose in 3.6 times as high, the radioactivity of fatty acids lowers. Nicotinamide administered to animals after fastening inhibits glyceroneogenesis in the fatty tissue, lowering considerably the incorporation of [14C] pyruvate into triacylglycerol glycerol and blood glucose.