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• W1635522245 abstract "Lipids play a critical role in many metabolic and biological processes, including energy production and storage, the formation and functioning of cellular membranes, and signal transduction. The biological importance of lipids has drawn extensive attention to the analysis of lipid molecular species. In particular, mass spectrometry (MS) has been shown to be a powerful tool in elucidating the diversity of lipid species and their participation in regulating cellular functions. In recent years, Fourier-transform ion cyclotron resonance mass spectrometry (FTICR-MS) has been increasingly utilized, particularly in profiling global lipid distribution. Its unprecedented mass accuracy enables the discernment of mass differences of less than 0.01 mass unit, such as those often observed in lipid analyses. Under the assumption that the cation species are known, the minimum accuracy for assigning the chemical composition of lipid species is 21.38 ppm. With the current FTICR-MS technology, this mass accuracy is achievable even in a broad band mass analysis in the range m/z 400-1,000. In addition, databases(DBs) with extensive entries are now available and play an essential role in identifying individual lipid molecular species among an enormous number of lipids. For example, the group of Taguchi has demonstrated that low magnetic field (4.7 T) FTICR MS can be applied to identify the molecular species of phophatidylethanolamine (PE) of Caenorhabditis elegans and their oxidized metabolites. Electrospray ionization (ESI) FTICR-MS of total lipid extracts has also been shown to be useful in detecting differences between the distributions of highly heterogeneous mixtures of lipids found in eukaryotic cells. In the present study, 4.7 T ESI-FTICR-MS was performed on porcine brain extracts to demonstrate its lipid profiling capability, and these results were rigorously checked with ESI-MS/MS using a linear ion-trap mass spectrometer. To our knowledge, this is the first study to rigorously validate the preliminary assignments of lipid species based on high accuracy mass values of FTICR MS by comparison with MS/MS results. In addition, a recently publicized web DB, “Lipidsearch”, with extensive lipid entries (advertised to have more than 100,000 entries) is fully utilized to obtain a lipid profile of the porcine brain sample." @default.
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• W1635522245 date "2006-05-20" @default.
• W1635522245 modified "2023-10-14" @default.
• W1635522245 title "Identification of Phospholipid Molecular Species in Porcine Brain Extracts Using High Mass Accuracy of 4.7 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometry" @default.
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• W1635522245 doi "https://doi.org/10.5012/bkcs.2006.27.5.793" @default.
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