A fast method for the determination of the PC/LPC ratio in intact serum by MALDI-TOF MS: an easy-to-follow lipid biomarker of inflammation.
Abstract: The PC/LPC ratio of blood serum is increasingly considered to represent an important clinical parameter that reflects various kinds of diseases. Here, a simple and fast method of lipid analyses of "intact" blood serum (i.e. without extraction) by MALDI-TOF mass spectrometry is described. The novel procedure allows the accurate determination of the PC/LPC ratio, utilizing only a tiny amount of blood. The serum is diluted with distilled water and directly applied onto the MALDI target and, after drying, covered by a thin layer of the matrix solution (either 9-aminoacridine or 2,5-dihydroxybenzoic acid). Positive ion mass spectra acquired by using this procedure give similar peak patterns as the spectra of the lipid extracts of horse blood serum. Blood serum from fourteen different horses was used to set up and validate the new method of lipid analysis. The PC/LPC ratios determined with the fast "intact" method were compared with those obtained with classical MALDI-TOF MS and (31)P NMR analyses of the corresponding lipid extracts. As comparable data were obtained, this is a clear indication that extraction is not an absolute necessity.
Copyright © 2014. Published by Elsevier Ireland Ltd.
Publication Date: 2014-07-09 PubMed ID: 25016154DOI: 10.1016/j.chemphyslip.2014.07.001Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The article presents a novel, quick method for analyzing the PC/LPC ratio in blood serum using MALDI-TOF mass spectrometry without the need for extraction, which helps detecting various diseases using a very small blood sample.
Introduction
- The researchers introduce the clinical significance of the Phosphatidylcholine to Lysophosphatidylcholine (PC/LPC) ratio in blood serum in reflecting various diseases.
- They propose a faster, simpler method for lipid analysis using a Matrix-Assisted Laser Desorption/Ionization Time of Flight (MALDI-TOF) mass spectrometry.
- This new method analyzes “intact” i.e. unprocessed, non-extracted blood serum and requires only a minuscule amount of blood.
Methodology
- The blood serum is simply diluted with distilled water, directly placed on the MALDI target, and covered with a thin layer of the matrix solution using either 9-aminoacridine or 2,5-dihydroxybenzoic acid.
- The mass spectra acquired through this method gave similar peak patterns as spectra obtained from the lipid extracts of horse blood serum, indicating the validity of this approach.
- Blood serum from fourteen different horses was used to validate this new method of lipid analysis.
Results and Conclusion
- The PC/LPC ratios determined with this new “intact” method were compared to those obtained with classical MALDI-TOF MS and (31)P NMR analyses of the corresponding lipid extracts.
- The data obtained via both the methods were similar, demonstrating that the lengthy extraction process is not necessarily needed for accurate determination of the PC/LPC ratio.
- This new method simplifies the blood serum lipid analysis process, reduces the amount of blood needed, and speeds up the analysis, thus having potential clinical implications in the early detection and management of inflammatory and other diseases.
Cite This Article
APA
(2014).
A fast method for the determination of the PC/LPC ratio in intact serum by MALDI-TOF MS: an easy-to-follow lipid biomarker of inflammation.
Chem Phys Lipids, 183, 169-175.
https://doi.org/10.1016/j.chemphyslip.2014.07.001 Publication
Researcher Affiliations
MeSH Terms
- Animals
- Biomarkers / blood
- Horses
- Inflammation / blood
- Lysophosphatidylcholines / blood
- Phosphatidylcholines / blood
- Reproducibility of Results
- Sensitivity and Specificity
- Spectrometry, Mass, Electrospray Ionization / methods
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods
Citations
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