This item still needs to be validated !
Title: In-situ c-13 nmr quantification of hepatic glycogen
Authors: Borgs, M ×
Van Hecke, Paul
Overloop, K
Decanniere, C
Van Huffel, Sabine
Stalmans, Willy
Vanstapel, Florent #
Issue Date: Nov-1993
Publisher: John wiley & sons ltd
Series Title: Nmr in biomedicine vol:6 issue:6 pages:371-376
Abstract: We report on the C-13 NMR visibility of the C-1 glycosidic carbon of alpha-particulate glycogen in perfused rat liver. We used rats fed ad libitum animals refed after a 48 h fast with a sucrose supplement with or without glucocorticoid treatment, and gsd/gsd rats with a hepatic glycogen storage disease due to phosphorylase kinase deficiency. Thus we studied a wide range of glycogen levels (25-140 mg/g liver). All livers were perfused with 15 mM glucose, to maintain constant glycogen levels. Failure to activate glycogen phosphorylase ensures stable glycogen levels in gsd/gsd livers. Natural abundance C-13 NMR signals were calibrated against a phantom containing a fixed amount of glycogen. Accumulated free induction decays were analysed after Fourier transformation by numerical integration, or by direct analysis of the signal in the time domain using a non-iterative method based on singular value decomposition. NMR quantification of the glycogen correlated well with the chemical determination over the whole concentration range. However, the precision (reproducibility) of glycogen determinations (be it by chemical methods or by NMR spectroscopy) may pose problems. Authors should be encouraged to report systematically on the precision of their methods.
ISSN: 0952-3480
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Laboratory of Clinical Bacteriology and Mycology
Biomedical MRI
Department of Cellular and Molecular Medicine - miscellaneous
Biomedical Quality Assurance Research Unit
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science