Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/8087
Title: Sources of hepatic glucose production by 2H2O ingestion and Bayesian analysis of 2H glucuronide enrichment
Authors: Delgado, T. C. 
Barosa, C. 
Castro, M. M. C. A. 
Geraldes, C. F. G. C. 
Bastos, M. 
Baptista, C. 
Fagulha, A. 
Barros, L. 
Mota, A. 
Carvalheiro, M. 
Jones, J. G. 
Merritt, Matthew 
Issue Date: 2008
Citation: Magnetic Resonance in Medicine. 60:3 (2008) 517-523
Abstract: The contribution of gluconeogenesis to hepatic glucose production (GP) was quantified after 2H2O ingestion by Bayesian analysis of the position 2 and 5 2H-NMR signals (H2 and H5) of monoacetone glucose (MAG) derived from urinary acetaminophen glucuronide. Six controls and 10 kidney transplant (KTx) patients with cyclosporine A (CsA) immunosuppressant therapy were studied. Seven KTx patients were lean and euglycemic (BMI = 24.3 ± 1.0 kg/m2; fasting glucose = 4.7 ± 0.1 mM) while three were obese and hyperglycemic (BMI = 30.5 ± 0.7 kg/m2; fasting glucose = 7.1 ± 0.5 mM). For the 16 spectra analyzed, the mean coefficient of variation for the gluconeogenesis contribution was 10% ± 5%. This uncertainty was associated with a mean signal-to-noise ratio (SNR) of 79:1 and 45:1 for the MAG H2 and H5 signals, respectively. For control subjects, gluconeogenesis contributed 54% ± 7% of GP as determined by the mean and standard deviation (SD) of individual Bayesian analyses. For the lean/normoglycemic KTx subjects, the gluconeogenic contribution to GP was 62% ± 7% (P = 0.06 vs. controls), while hyperglycemic/obese KTx patients had a gluconeogenic contribution of 68% ± 3% (P < 0.005 vs. controls). These data suggest that in KTx patients, an increased gluconeogenic contribution to GP is strongly associated with obesity and hyperglycemia. Magn Reson Med 60:517-523, 2008. © 2008 Wiley-Liss, Inc.
URI: http://hdl.handle.net/10316/8087
DOI: 10.1002/mrm.21681
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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