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Sources of glucose production in cirrhosis by 2H2O ingestion and 2H NMR analysis of plasma glucose

2003Journal article Open access
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dc.contributor.authorPerdigoto, R
dc.contributor.authorFurtado, AL
dc.contributor.authorPorto, A
dc.contributor.authorRodrigues, TB
dc.contributor.authorGeraldes, CF
dc.contributor.authorJones, JG
dc.date.accessioned2009-08-21T14:52:34Z
dc.date.available2009-08-21T14:52:34Z
dc.date.issued2003
dc.description.abstractPlasma glucose 2H enrichment was quantified by 2H NMR in patients with cirrhosis (n=6) and healthy subjects (n=5) fasted for 16 h and given 2H(2)O to approximately 0.5% body water. The percent contribution of glycogenolysis and gluconeogenesis to glucose production (GP) was estimated from the relative enrichments of hydrogen 5 and hydrogen 2 of plasma glucose. Fasting plasma glucose levels were normal in both groups (87+/-7 and 87+/-24 mg/dl for healthy and cirrhotic subjects, respectively). The percent contribution of glycogen to GP was smaller in cirrhotics than controls (22+/-7% versus 46+/-4%, P<0.001), while the contribution from gluconeogenesis was larger (78+/-7% versus 54+/-4%, P<0.001). In all subjects, glucose 6R and 6S hydrogens had similar enrichments, consistent with extensive exchange of 2H between body water and the hydrogens of gluconeogenic oxaloacetate (OAA). The difference in 2H-enrichment between hydrogen 5 and hydrogen 6S was significantly larger in cirrhotics, suggesting that the fractional contribution of glycerol to the glyceraldehyde-3-phosphate (G3P)-moiety of plasma glucose was higher compared to controls (19+/-6% versus 7+/-6%, P<0.01). In all subjects, hydrogens 4 and 5 of glucose had identical enrichments while hydrogen 3 enrichments were systematically lower. This reflects incomplete exchange between the hydrogen of water and that of 1-R-dihydroxyacetone phosphate (DHAP) or incomplete exchange of DHAP and G3P pools via triose phosphate isomerase.pt
dc.identifier.citationBiochim Biophys Acta. 2003 Mar 20;1637(2):156-63pt
dc.identifier.urihttp://hdl.handle.net/10400.4/551
dc.language.isoengpt
dc.publisherElsevierpt
dc.rights.uriopenAccessen
dc.subjectCirrose Hepáticapt
dc.subjectGlicosept
dc.titleSources of glucose production in cirrhosis by 2H2O ingestion and 2H NMR analysis of plasma glucosept
dc.typejournal article
dspace.entity.typePublication
rcaap.typearticlept

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