Glutamine nitrogen kinetics in insulin-dependent diabetic humans
| Autor: | J. Koziet, J. J. Robert, Dominique Darmaun, M. Rongier |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Adult
Male medicine.medical_specialty Nitrogen Physiology Glutamine Endocrinology Diabetes and Metabolism Proteolysis Kinetics Leucine Physiology (medical) Diabetes mellitus Internal medicine medicine Humans Insulin medicine.diagnostic_test Chemistry Metabolism medicine.disease De novo synthesis Diabetes Mellitus Type 1 Endocrinology Hyperglycemia Insulin dependent |
| Zdroj: | American Journal of Physiology-Endocrinology and Metabolism. 261:E713-E718 |
| ISSN: | 1522-1555 0193-1849 |
| DOI: | 10.1152/ajpendo.1991.261.6.e713 |
| Popis: | To assess the effect of insulin deficiency on whole body glutamine kinetics, five young adults with type I (insulin-dependent) diabetes received 4-h primed continuous infusions of L-[1-13C]leucine and L-[2-15N]glutamine in the postabsorptive state after blood glucose had been clamped overnight at either a normoglycemic level (approximately 85 mg/dl) or a moderate hyperglycemic level (approximately 260 mg/dl) by means of an automated glucose control insulin infusion system. The hyperglycemic state was associated with a significant rise in leucine level [from 165 +/- 23 to 242 +/- 62 (SD) microM], appearance rate (from 125 +/- 11 to 142 +/- 17 mumol.kg-1.h-1), and oxidation (from 27 +/- 10 to 31 +/- 10 mumol.kg-1.h-1). In contrast, neither the plasma level nor the appearance rate of glutamine (333 +/- 51 vs. 318 +/- 58 mumol.kg-1.h-1) was affected. We conclude that insulin deficiency resulting in moderate hyperglycemia induces a 13% rise in whole body proteolysis and yet does not stimulate glutamine de novo synthesis, despite increased precursor availability. |
| Databáze: | OpenAIRE |
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