Untargeted UPLC-MS Profiling Pipeline to Expand Tissue Metabolome Coverage: Application to Cardiovascular Disease.
File(s)Anal. Chem., 2015, 87 (8).pdf (4.27 MB)
Published version
Author(s)
Type
Journal Article
Abstract
Metabolic profiling studies aim to achieve broad metabolome coverage in specific biological samples. However, wide metabolome coverage has proven difficult to achieve, mostly because of the diverse physicochemical properties of small molecules, obligating analysts to seek multiplatform and multimethod approaches. Challenges are even greater when it comes to applications to tissue samples, where tissue lysis and metabolite extraction can induce significant systematic variation in composition. We have developed a pipeline for obtaining the aqueous and organic compounds from diseased arterial tissue using two consecutive extractions, followed by a different untargeted UPLC-MS analysis method for each extract. Methods were rationally chosen and optimized to address the different physicochemical properties of each extract: hydrophilic interaction liquid chromatography (HILIC) for the aqueous extract and reversed-phase chromatography for the organic. This pipeline can be generic for tissue analysis as demonstrated by applications to different tissue types. The experimental setup and fast turnaround time of the two methods contributed toward obtaining highly reproducible features with exceptional chromatographic performance (CV % < 0.5%), making this pipeline suitable for metabolic profiling applications. We structurally assigned 226 metabolites from a range of chemical classes (e.g., carnitines, α-amino acids, purines, pyrimidines, phospholipids, sphingolipids, free fatty acids, and glycerolipids) which were mapped to their corresponding pathways, biological functions and known disease mechanisms. The combination of the two untargeted UPLC-MS methods showed high metabolite complementarity. We demonstrate the application of this pipeline to cardiovascular disease, where we show that the analyzed diseased groups (n = 120) of arterial tissue could be distinguished based on their metabolic profiles.
Date Issued
2015-02-09
Date Acceptance
2015-02-09
Citation
Analytical Chemistry, 2015, 87 (8), pp.4184-4193
ISSN
1086-4377
Publisher
American Chemical Society
Start Page
4184
End Page
4193
Journal / Book Title
Analytical Chemistry
Volume
87
Issue
8
Copyright Statement
© 2015 American Chemical Society. ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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Subjects
Science & Technology
Physical Sciences
Chemistry, Analytical
Chemistry
MASS-SPECTROMETRY
HYDROPHILIC INTERACTION
LIQUID-CHROMATOGRAPHY
METABONOMIC ANALYSIS
EXTRACTION METHODS
REVERSED-PHASE
RAT URINE
LC-MS
ASSOCIATIONS
REVEALS
Amino Acids
Arteries
Cardiovascular Diseases
Carnitine
Chromatography, High Pressure Liquid
Fatty Acids
Lipids
Mass Spectrometry
Purines
Pyrimidines
Analytical Chemistry
0301 Analytical Chemistry
0904 Chemical Engineering
0399 Other Chemical Sciences