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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Lipid+Res
2014 ; 55
(11
): 2432-42
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Three-dimensional enhanced lipidomics analysis combining UPLC, differential ion
mobility spectrometry, and mass spectrometric separation strategies
#MMPMID25225680
Baker PR
; Armando AM
; Campbell JL
; Quehenberger O
; Dennis EA
J Lipid Res
2014[Nov]; 55
(11
): 2432-42
PMID25225680
show ga
Phospholipids serve as central structural components in cellular membranes and as
potent mediators in numerous signaling pathways. There are six main classes of
naturally occurring phospholipids distinguished by their distinct polar head
groups that contain many unique molecular species with distinct fatty acid
composition. Phospholipid molecular species are often expressed as isobaric
species that are denoted by the phospholipid class and the total number of carbon
atoms and double bonds contained in the esterified fatty acyl groups (e.g.,
phosphatidylcholine 34:2). Techniques to separate these molecules exist, and each
has positive and negative attributes. Hydrophilic interaction liquid
chromatography uses polar bonded silica to separate lipids by polar head group
but not by specific molecular species. Reversed phase (RP) chromatography can
separate by fatty acyl chain composition but not by polar head group. Herein we
describe a new strategy called differential ion mobility spectrometry (DMS),
which separates phospholipid classes by their polar head group. Combining DMS
with current LC methods enhances phospholipid separation by increasing
resolution, specificity, and signal-to-noise ratio. Additional application of
specialized information-dependent acquisition methodologies along with RP
chromatography allows full isobaric resolution, identification, and compositional
characterization of specific phospholipids at the molecular level.
|Artifacts
[MESH]
|Chromatography, High Pressure Liquid/*methods
[MESH]