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- W2969293807 abstract "Metabolic profiling of biofluids, based on the quantitative analysis of the concentration profile of their free low molecular mass metabolites, has been playing increasing role employed as a means to gain understanding of the progression of metabolic disorders, including obesity. Chromatographic methods coupled with mass spectrometry have been established as a strategy for metabolic profiling. Among these, GC–MS, targeting mainly the primary metabolism intermediates, offers high sensitivity, good peak resolution and extensive databases. However, the derivatization step required for many involatile metabolites necessitates specific data validation, normalization and analysis protocols to ensure accurate and reproducible performance. In this study, the GC–MS metabolic profiles of plasma samples from mice maintained on 12- or 15-month long low (10kcal%) or high (60kcal%) fat diets were obtained. The profiles of the trimethylsilyl(TMS)-methoxime(MeOx) derivatives of the free polar metabolites were acquired through GC–(ion trap)MS, using [U–¹³C]-glucose as the internal standard. After the application of a recently developed data correction and normalization/filtering protocol for GC–MS metabolomic datasets, the profiles of 48 out of the 77 detected metabolites were used in multivariate statistical analysis. Data mining suggested a decrease in the activity of the energy metabolism with age. In addition, the metabolic profiles indicated the presence of subpopulations with different physiology within the high- and low-fat diet mice, which correlated well with the difference in body weight among the animals and current knowledge about hyperglycemic conditions." @default.
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- W2969293807 date "2011-01-01" @default.
- W2969293807 modified "2023-09-27" @default.
- W2969293807 title "A GC–MS metabolic profiling study of plasma samples from mice on low- and high-fat diets" @default.
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