文章基本信息

标题：Multidimensional profiling of plasma lipoproteins by size exclusion chromatography followed by reverse-phase protein arrays
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作者：Gregor Dernick ; Stefan Obermüller ; Cyrill Mangold 等
期刊名称：JLR Papers In Press
印刷版ISSN：0022-2275
电子版ISSN：1539-7262
出版年度：2011
卷号：52
期号：12
页码：2323-2331
DOI：10.1194/jlr.D016824
语种：English
出版社：American Society for Biochemistry and Molecular Biology
摘要：The composition of lipoproteins and the association of proteins with various particles are of much interest in the context of cardiovascular disease. Here, we describe a technique for the multidimensional analysis of lipoproteins and their associated apolipoproteins. Plasma is separated by size exclusion chromatography (SEC), and fractions are analyzed by reverse-phase arrays. SEC fractions are spotted on nitrocellulose slides and incubated with different antibodies against individual apolipoproteins or antibodies against various apolipoproteins. In this way, tens of analytes can be measured simultaneously in 100 μl of plasma from a single SEC separation. This methodology is particularly suited to simultaneous analysis of multiple proteins that may change their distribution to lipoproteins or alter their conformation, depending on factors that influence circulating lipoprotein size or composition. We observed changes in the distribution of exchangeable apolipoproteins following addition of recombinant apolipoproteins or interaction with exogenous compounds. While the cholesteryl ester transfer protein (CETP)-dependent formation of pre-β-HDL was inhibited by the CETP inhibitors torcetrapib and anacetrapib, it was not reduced by the CETP modulator dalcetrapib. This finding was elucidated using this technique.
关键词：HDL proteomics ; protein-protein interaction ; protein-lipid interaction ; fast protein liquid chromatography ; size exclusion chromatography ; reverse-phase arrays