Abstract
The turnover of glutamine was measured in rats with [1-14C]glutamine. Rates of turnover measured by constant infusion of the label were 130 mumol/h per 100g body wt. in control rats and were not changed in chronic metabolic acidosis. These rates of turnover of whole-body glutamine were about 13-26% of the rate of net glutamine release into the bloodstream, indicating that the bulk of glutamine turnover in vivo is concerned with intracellular processes rather than inter-organ fluxes.
Full text
PDF



Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- DUDA G. D., HANDLER P. Kinetics of ammonia metabolism in vivo. J Biol Chem. 1958 May;232(1):303–314. [PubMed] [Google Scholar]
- Damian A. C., Pitts R. F. Rates of glutaminase I and glutamine synthetase reactions in rat kidney in vivo. Am J Physiol. 1970 May;218(5):1249–1255. doi: 10.1152/ajplegacy.1970.218.5.1249. [DOI] [PubMed] [Google Scholar]
- Lueck J. D., Miller L. L. The effect of perfusate pH on glutamine metabolism in the isolated perfused rat liver. J Biol Chem. 1970 Oct 25;245(20):5491–5497. [PubMed] [Google Scholar]
- Norenberg M. D., Martinez-Hernandez A. Fine structural localization of glutamine synthetase in astrocytes of rat brain. Brain Res. 1979 Feb 2;161(2):303–310. doi: 10.1016/0006-8993(79)90071-4. [DOI] [PubMed] [Google Scholar]
- Schröck H., Goldstein L. Interorgan relationships for glutamine metabolism in normal and acidotic rats. Am J Physiol. 1981 May;240(5):E519–E525. doi: 10.1152/ajpendo.1981.240.5.E519. [DOI] [PubMed] [Google Scholar]
- Shipley R. A., Chudzik E. B., Gibbons A. P., Jongedyk K., Brummond D. O. Rate of glucose transformation in the rat by whole-body analysis after blucose-14-C. Am J Physiol. 1967 Nov;213(5):1149–1158. doi: 10.1152/ajplegacy.1967.213.5.1149. [DOI] [PubMed] [Google Scholar]
- Squires E. J., Brosnan J. T. Determination of the specific radioactivity of 14C-labeled glutamic acid and glutamine. Anal Biochem. 1978 Feb;84(2):473–478. doi: 10.1016/0003-2697(78)90065-9. [DOI] [PubMed] [Google Scholar]
- Squires E. J., Hall D. E., Brosnan J. T. Arteriovenous differences for amino acids and lactate across kidneys of normal and acidotic rats. Biochem J. 1976 Oct 15;160(1):125–128. doi: 10.1042/bj1600125. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Waterlow J. C., Stephen J. M. The measurement of total lysine turnover in the rat by intravenous infusion of L-[U-14C]lysine. Clin Sci. 1967 Dec;33(3):489–506. [PubMed] [Google Scholar]
