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ABSTRACT: Background
Elevated concentrations of liver enzymes have been associated with an increased risk of developing type 2 diabetes mellitus. However, it remains unclear to which specific aspects of diurnal glucose metabolism these associate most. We aimed to investigate the associations between liver enzyme concentrations and 24?h-glucose trajectories in individuals without diabetes mellitus from three independent cohorts.Methods
This cross-sectional study included 436 participants without diabetes mellitus from the Active and Healthy Aging Study, the Switchbox Study, and the Growing Old Together Study. Fasting blood samples were drawn to measure gamma-glutamyltransferase (GGT), alanine transaminase, and aspartate transaminase. Measures of glycemia (e.g., nocturnal and diurnal mean glucose levels) and glycemic variability (e.g., mean amplitude of glucose excursions) were derived from continuous glucose monitoring. Analyses were performed separately for the three cohorts; derived estimates were additionally meta-analyzed.Results
After meta-analyses of the three cohorts, elevated liver enzyme concentrations, and specifically elevated GGT concentrations, were associated with higher glycemia. More specific, participants in the highest GGT tertile (GGT ?37.9?U/L) had a 0.39?mmol/L (95% confidence interval: 0.23, 0.56) higher mean nocturnal glucose (3:00 to 6:00 a.m.) and a 0.23?mmol/L (0.10, 0.36) higher diurnal glucose (6:00 to 0:00 a.m.) than participants in the lowest GGT tertile (GGT <21.23?U/L). However, elevated liver enzyme concentrations were not associated with a higher glycemic variability.Conclusion
Though elevated liver enzyme concentrations did not associate with higher glycemic variability in participants without diabetes mellitus, specifically, elevated GGT concentrations associated with higher glycemia.
SUBMITTER: Noordam R
PROVIDER: S-EPMC5601417 | biostudies-literature | 2017
REPOSITORIES: biostudies-literature
Noordam Raymond R Vermond Debbie D Drenth Hermijntje H Wijman Carolien A CA Akintola Abimbola A AA van der Kroef Sabrina S Jansen Steffy W M SWM Huurman Neline C NC Schutte Bianca A M BAM Beekman Marian M Slagboom P Eline PE Mooijaart Simon P SP van Heemst Diana D
Frontiers in endocrinology 20170913
<h4>Background</h4>Elevated concentrations of liver enzymes have been associated with an increased risk of developing type 2 diabetes mellitus. However, it remains unclear to which specific aspects of diurnal glucose metabolism these associate most. We aimed to investigate the associations between liver enzyme concentrations and 24 h-glucose trajectories in individuals without diabetes mellitus from three independent cohorts.<h4>Methods</h4>This cross-sectional study included 436 participants wi ...[more]