Organic solvent extraction of proteins and peptides from serum as an effective sample preparation for detection and identification of biomarkers by mass spectrometry

Oleg Chertov*, Arya Biragyn, Larry W. Kwak, John T. Simpson, Tatiana Boronina, Van M. Hoang, Da Rue A. Prieto, Thomas P. Conrads, Timothy D. Veenstra, Robert J. Fisher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

134 Scopus citations

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.

Original languageEnglish
Pages (from-to)1195-1203
Number of pages9
JournalProteomics
Volume4
Issue number4
DOIs
StatePublished - Apr 2004
Externally publishedYes

Keywords

  • Apolipoprotein A-II
  • Biomarkers
  • Serum
  • Surface-enhanced laser desorption/ionization
  • Tumor

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