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Han J, Tschernutter V, Yang J, Eckle T, Borchers CH. Analysis of selected sugars and sugar phosphates in mouse heart tissue by reductive amination and liquid chromatography-electrospray ionization mass spectrometry. Anal Chem 2013; 85:5965-73. [PMID: 23682691 PMCID: PMC3989532 DOI: 10.1021/ac400769g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Sensitive and reliable analysis of sugars and sugar phosphates in tissues and cells is essential for many biological and cell engineering studies. However, the successful analysis of these endogenous compounds in biological samples by liquid chromatography/electrospray ionization mass spectrometry (LC/ESI-MS) is often difficult because of their poor chromatographic retention properties in reversed-phase LC, the complex biological matrices, and the ionization suppression in ESI. This situation is further complicated by the existence of their multiple structural isomers in vivo. This work describes the combination of reductive amination using 3-amino-9-ethylcarbazole, with a new LC approach using a pentafluorophenyl core-shell ultrahigh performance (UP) LC column and methylphosphonic acid as an efficient tail-sweeping reagent for improved chromatographic separation. This new method was used for selected detection and accurate quantitation of the major free and phosphorylated reducing sugars in mouse heart tissue. Among the detected compounds, accurate quantitation of glyceraldehyde, ribose, glucose, glycerylaldehyde-3-phosphate, ribose-5-phosphate, glucose-6-phosphate, and mannose-6-phosphate was achieved by UPLC/multiple-reaction monitoring (MRM)-MS, with analytical accuracies ranging from 87.4% to 109.4% and CVs of ≤8.5% (n = 6). To demonstrate isotope-resolved metabolic profiling, we used UPLC/quadrupole time-of-flight (QTOF)-MS to analyze the isotope distribution patterns of C3 to C6 free and phosphorylated reducing sugars in heart tissues from (13)C-labeled wild type and knockout mice. In conclusion, the preanalytical derivatization-LC/ESI-MS method has resulted in selective determination of free and phosphorylated reducing sugars without the interferences from their nonreducing structural isomers in mouse heart tissue, with analytical sensitivities in the femtomole to low picomole range.
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Affiliation(s)
- Jun Han
- University of Victoria - Genome BC Proteomics Centre, University of Victoria, Vancouver Island Technology Park, 3101-4464 Markham Street, Victoria, British Columbia V8Z 7X8, Canada
| | - Vera Tschernutter
- University of Victoria - Genome BC Proteomics Centre, University of Victoria, Vancouver Island Technology Park, 3101-4464 Markham Street, Victoria, British Columbia V8Z 7X8, Canada
| | - Juncong Yang
- University of Victoria - Genome BC Proteomics Centre, University of Victoria, Vancouver Island Technology Park, 3101-4464 Markham Street, Victoria, British Columbia V8Z 7X8, Canada
| | - Tobias Eckle
- Mucosal Inflammation Program, Department of Anesthesiology, University of Colorado, Denver, Colorado, United States
| | - Christoph H. Borchers
- University of Victoria - Genome BC Proteomics Centre, University of Victoria, Vancouver Island Technology Park, 3101-4464 Markham Street, Victoria, British Columbia V8Z 7X8, Canada
- Department of Biochemistry and Microbiology, University of Victoria, Petch Building Room 207, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
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Sweeley CC. Reflections on my career in analytical chemistry and biochemistry. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2010; 86:822-36. [PMID: 20948176 PMCID: PMC3037520 DOI: 10.2183/pjab.86.822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Accepted: 07/12/2010] [Indexed: 05/30/2023]
Abstract
My career has been focused in two major areas, analytical chemistry and biochemistry of complex lipids and glycoconjugates. Included here are the pioneering work on the gas chromatography of long-chain sphingolipid bases, carbohydrates, steroids and urinary organic acids. Mass spectrometry was utilized extensively in structural studies of sphingolipids, fatty acids, carbohydrates, steroids, urinary organic acids, polyisoprenoid alcohols, and juvenile hormone. Computer systems were developed for the acquisition and analysis of mass spectra, and were used for development of automated metabolic profiling of complex mixtures of metabolites. Fabry's disease was discovered to be a glycosphingolipidosis. Enzymes of lysosomal metabolism of glycosphingolipids were purified, characterized, and used in one of the first demonstrations of the feasibility of enzyme replacement therapy in a lysosomal storage disorder (Fabry's disease). Extracellular sialidases were studied to evaluate the hypothesis that they might be involved in the regulation of membrane growth factor receptors. The enzyme for hematoside synthesis was purified and characterized.
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Affiliation(s)
- Charles C Sweeley
- Department of Biochemistry, Michigan State University, East Lansing, Michigan 48823, USA.
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