Abstract
Lipid metabolic pathways play pivotal roles in liver function, and disturbances of these pathways are associated with various diseases. Thus, comprehensive characterization and measurement of lipid metabolites are essential to deciphering the contributions of lipid network metabolism to diseases or its responses to drug intervention. Here, we report an integrated lipidomic analysis for the comprehensive detection of lipid metabolites. To facilitate the characterization of untargeted lipids through fragmentation analysis, nine formulas were proposed to identify the fatty acid composition of lipids from complex MSn spectrum information. By these formulas, the co-eluted isomeric compounds could be distinguished. In total, 250 lipids were detected and characterized, including diacylglycerols, triacylglycerols, glycerophosphoethanolamines, glycerophosphocholines, glycerophosphoserines, glycerophosphoglycerols, glycerophosphoinositols, cardiolipins, ceramides, and sphingomyelins. Integrated with the targeted lipidomics, a total of 27 inflammatory oxylipins were also measured. To evaluate the aberrant lipid metabolism involved in liver injury induced by Tripterygium wilfordii, lipid network metabolism was further investigated. Results indicated that energy lipid modification, membrane remodeling, potential signaling lipid alterations, and abnormal inflammation response were associated with injury. Because of the important roles of lipids in liver metabolism, this new method is expected to be useful in analyzing other lipid metabolism diseases.
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Acknowledgments
This study was financially supported by the Natural Science Foundation of China (Grants No. 81303295, 81373688, 81573869); the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20130959); The Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20133237120001); colleges and universities in Jiangsu Province Natural Science Research (Grant No. 13KJB360005), and the Open Project Program of Jiangsu Key Laboratory of Pediatric Respiratory Disease, Nanjing University of Chinese Medicine (Grant No. JKLPRD201407).
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Animal experiments were carried out in compliance with the standard ethical guidelines and under the control of the university ethical committee.
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Xie, T., Zhou, X., Wang, S. et al. Development and application of a comprehensive lipidomic analysis to investigate Tripterygium wilfordii-induced liver injury. Anal Bioanal Chem 408, 4341–4355 (2016). https://doi.org/10.1007/s00216-016-9533-9
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DOI: https://doi.org/10.1007/s00216-016-9533-9