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采用新型亚 2μm 核壳颗粒优化超高效液相色谱-飞行时间质谱法,深入分析秀丽隐杆线虫的脂质组图谱。

Optimizing a ultrahigh pressure liquid chromatography-time of flight-mass spectrometry approach using a novel sub-2μm core-shell particle for in depth lipidomic profiling of Caenorhabditis elegans.

机构信息

Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany.

Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany.

出版信息

J Chromatogr A. 2014 Sep 12;1359:91-9. doi: 10.1016/j.chroma.2014.07.021. Epub 2014 Jul 18.


DOI:10.1016/j.chroma.2014.07.021
PMID:25074420
Abstract

Lipid profiling or lipidomics is currently applied in many different research fields. It refers to the global analysis of a samples lipid content using different analytical chemistry methods, with mass spectrometry as the mostly employed technology. We developed a comprehensive in-depth analysis method for the lipidome of the soil-dwelling nematode Caenorhabitis elegans, a widely used model organism. Four different columns were compared with a generic gradient and a novel sub-2-μm core-shell column, Waters Cortecs C18, showed superior performance in case of chromatographic peak characteristics, e.g. plate numbers and number of detected lipid features. Retention time deviation was generally less than 1% within one column and below 5% for columns from different batches. Intensity variation was lower than 30% for most detected features. Improved chromatographic separation showed enhanced resolution for isomeric lipids and allowed collection of highly detailed MS/MS spectra for lipid identification. In total 1304 lipid features were detected in positive ionization mode and 265 in negative mode. Lipids from different classes were annotated and MS/MS spectra obtained by data dependent fragmentation were used for identification purposes.

摘要

脂质组学或脂质组分析目前广泛应用于许多不同的研究领域。它是指使用不同的分析化学方法对样本中的脂质含量进行全面分析,其中质谱分析技术应用最为广泛。我们开发了一种全面深入的土壤线虫秀丽隐杆线虫脂质组分析方法,秀丽隐杆线虫是一种广泛应用的模式生物。我们比较了四种不同的色谱柱和一种通用的梯度洗脱程序,结果表明,Waters Cortecs C18 亚 2μm 核壳柱在色谱峰特征(如理论塔板数和检测到的脂质特征数量)方面表现出优异的性能。在同一根色谱柱内,保留时间偏差一般小于 1%,不同批次色谱柱之间的偏差小于 5%。对于大多数检测到的特征,强度变化小于 30%。改进的色谱分离提高了对同分异构体脂质的分辨率,并允许收集用于脂质鉴定的高度详细的 MS/MS 光谱。在正离子模式下共检测到 1304 种脂质特征,负离子模式下检测到 265 种。对不同类别的脂质进行注释,并对数据依赖碎裂获得的 MS/MS 光谱进行鉴定。

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