1. Organic solvent extraction of proteins and peptides from serum as an effective sample preparation for detection and identification of biomarkers by mass spectrometry
- Author
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Timothy D. Veenstra, Thomas P. Conrads, Van M. Hoang, Da Rue A. Prieto, Robert J. Fisher, Arya Biragyn, Oleg Chertov, Larry W. Kwak, Tatiana Boronina, and John T. Simpson
- Subjects
Chromatography ,Acetonitriles ,Lymphoma, B-Cell ,Chemistry ,Proteins ,Mass spectrometry ,Proteomics ,Biochemistry ,Sample preparation in mass spectrometry ,Mass Spectrometry ,Surface-enhanced laser desorption/ionization ,Matrix-assisted laser desorption/ionization ,Mice ,Blood serum ,Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ,Animals ,Trifluoroacetic Acid ,Sample preparation ,Time-of-flight mass spectrometry ,Peptides ,Molecular Biology ,Apolipoprotein A-II ,Biomarkers ,Chromatography, High Pressure Liquid - Abstract
A method to extract peptides and low molecular weight proteins from serum under denaturing conditions using acetonitrile containing 0.1% trifluoroacetic acid has been developed. The extraction procedure precipitates large, abundant proteins to simplify subsequent mass spectral analysis. This sample preparation method provides an efficient way to extract serum peptides, enabling them to be compared and identified using different mass spectrometry approaches. Surface-enhanced laser desorption/ionization-time of flight mass spectrometry analysis of mouse blood serum samples prepared by this method allowed detection of two markers which were significantly reduced in mice with B cell lymphoma tumor. One of these markers has been identified as apolipoprotein A-II.
- Published
- 2004