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American Journal of Clinical Nutrition, Vol 33, 1446-1450, Copyright © 1980 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Glucose metabolism in uremia

A Quintanilla, GE Shambaugh 3d, TP Gibson and R Craig

Formation of CO2 from uniformly labeled 14C-glucose was measured in liver slices from uremic and normal rats. Both CO2 formation and lactate concentration were decreased in the uremic liver slices suggesting an inhibition of glucose oxidation. In addition, a net loss of glucose from the medium in the uremic preparation and a net gain in the normal controls suggested that there was increased nonoxidative utilization in the uremic liver. Such changes could not be explained by differences in glucose availability consequent to alterations in glycogen degradation. The most likely explanation is diversion of glucose into other biosynthetic pathways such as the synthesis of amino acids. In this regard, synthesis of glutamine appeared to be enhanced in uremia. Thus, products of carbohydrate metabolism may provide a potential mechanism for disposition of ammonia and synthesis of amino acids in uremia.




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Copyright © 1980 by The American Society for Nutrition