alexa Contribution of gluconeogenesis to overall glucose output in diabetic and nondiabetic men.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Metabolic Syndrome

Author(s): Consoli A, Nurjhan N

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Abstract Increased hepatic glucose output is the main cause of fasting hyperglycemia in non-insulin dependent diabetes mellitus. Due to difficulties in obtaining a quantitative estimate of gluconeogenesis in vivo, the relative contribution of gluconeogenesis and glycogenolysis to this increased hepatic glucose output was unknown. The application in vivo of a new isotopic approach based on a mathematical model of the Krebs cycle enabled us to obtain a quantitative estimate of gluconeogenesis in vivo. Using this approach, gluconeogenesis was found to account for approximately 28\% and approximately 97\% of overall hepatic glucose output in healthy volunteers in the postabsorptive and in the fasted state respectively. When this technique was used to compare gluconeogenesis rates in non-insulin dependent diabetes mellitus and nondiabetic patients, gluconeogenesis was found to be increased threefold in the patients with non-insulin dependent diabetes mellitus (12.7 +/- 1.6 mu vs 3.6 +/- 0.6 mumol/Kg/min) and to be significantly correlated with fasting plasma glucose. Furthermore, the increase in gluconeogenesis could explain more than 80\% of the increase in overall hepatic glucose output in patients with non-insulin dependent diabetes mellitus. In conclusion, in non-insulin dependent diabetes mellitus, gluconeogenesis, as measured by a new isotopic technique, is increased and this increase represents the main cause for increased overall hepatic glucose output and fasting hyperglycemia.
This article was published in Ann Med and referenced in Journal of Metabolic Syndrome

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