Pharmaceutical Sciences Faculty Publications

Title

Organic Solvent Extraction of Proteins and Peptides from Serum as an Effective Sample Preparation for Detection and Identification of Biomarkers by Mass Spectrometry

Document Type

Article

Publication Date

4-1-2004

Journal Title

Proteomics

ISSN

1615-9853

Volume

4

Issue

4

First Page

1195

Last Page

1203

DOI

10.1002/pmic.200300677

PubMed ID

15048999

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.

Keywords

Acetonitriles, biomarkers, chromatography, high pressure liquid, lymphoma, mass spectrometry, peptides, proteins, trifluoroacetic acid

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