Abstract
Stroke is a major cause of mortality and long-term disability worldwide. The study of biomarkers and pathogenesis is vital for early diagnosis and treatment of stroke. In the present study, a continuous-flow normal-phase/reversed-phase two-dimensional liquid chromatography–quadrupole time-of-flight mass spectrometry (NP/RP 2D LC-QToF/MS) method was employed to measure lipid species in human plasma, including healthy controls and lacunar infarction (LI) patients. As a result, 13 lipid species were demonstrated with significant difference between the two groups, and a “plasma biomarker model” including glucosylceramide (38:2), phosphatidylethanolamine (35:2), free fatty acid (16:1), and triacylglycerol (56:5) was finally established. This model was evaluated as an effective tool in that area under the receiver operating characteristic curve reached 1.000 in the discovery set and 0.947 in the validation set for diagnosing LI patients from healthy controls. Besides, the sensitivity and specificity of disease diagnosis in validation set were 93.3% and 96.6% at the best cutoff value, respectively. This study demonstrates the promising potential of NP/RP 2D LC-QToF/MS-based lipidomics approach in finding bio-markers for disease diagnosis and providing special insights into the metabolism of stroke induced by small vessel disease.
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Abbreviations
- ARIC:
-
Atherosclerosis risk in communities
- AUC:
-
Area under the curve
- BPCs:
-
Base peak chromatograms
- CEF:
-
Compound exchange format
- Cer:
-
Ceramide
- DG:
-
Diacylglycerol
- EICs:
-
Extracted ion chromatograms
- ESM:
-
Electronic supplementary material
- FDR:
-
False discovery rate
- FFA:
-
Free fatty acids
- GalCer:
-
Galactosylceramide
- GCS:
-
Glucosylceramide synthase
- GluCer:
-
Glucosylceramide
- LacCer:
-
Lactosylceramide
- LI:
-
Lacunar infarction
- LPC:
-
Lysophosphatidylcholine
- LPE:
-
Lysophosphatidylethanolamine
- LPG:
-
Lysophosphatidylglycerol
- MG:
-
Monoacylglycerol
- MPP:
-
Mass profiler professional
- MS/MS:
-
Tandem mass spectra
- NP/RP 2D LC-QToF/MS:
-
Normal-phase/reversed-phase two-dimensional liquid chromatography–quadrupole time-of-flight mass spectrometry
- PC:
-
Phosphatidylcholine
- PCA:
-
Principal component analysis
- PE:
-
Phosphatidylethanolamine
- PG:
-
Phosphatidylglycerol
- PI:
-
Phosphatidylinositol
- PLA2 :
-
Phospholipase A2
- PS:
-
Phosphatidylserine
- ROC:
-
Receiver operating characteristic
- SM:
-
Sphingomyelin
- TG:
-
Triacylglycerol
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Acknowledgements
This study was financially supported by the National Natural Science Foundation of China (grant numbers, 21527809 and 21175005).
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Li Yang and Pu Lv contributed equally to this work.
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Yang, L., Lv, P., Ai, W. et al. Lipidomic analysis of plasma in patients with lacunar infarction using normal-phase/reversed-phase two-dimensional liquid chromatography–quadrupole time-of-flight mass spectrometry. Anal Bioanal Chem 409, 3211–3222 (2017). https://doi.org/10.1007/s00216-017-0261-6
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DOI: https://doi.org/10.1007/s00216-017-0261-6