Biomarker identification in human pancreatic cancer sera

Pancreas
Jay S HanasDaniel J Brackett

Abstract

The aim of this study is to identify biomarkers in sera of pancreatic cancer patients using mass spectrometry (MS) approaches. Sera from patients diagnosed with pancreatic adenocarcinoma and sera from normal volunteers were subjected to gel electrophoresis to resolve and quantify differences in protein levels. Protein bands that differed quantitatively were digested with trypsin, and peptides were identified by electrospray ionization (ESI) ion-trap tandem MS. Mass spectra were also collected directly from pancreatic cancer sera as well as healthy control sera using ESI-MS. Three large-mass proteins were found to be elevated in pancreatic cancer sera versus normal sera, alpha-2 macroglobulin, ceruloplasmin, and complement 3C. Complement 3C is a major regulator of inflammatory responses. The ESI-MS of human pancreatic cancer sera versus normal sera revealed greater heterogeneity in cancer sera than control sera, especially in the low-mass region. Bootstrapping statistical analysis identified 20 low-mass serum peaks that correlated with control sera and 20 different peaks that correlated with pancreatic cancer sera. The fact that inflammation-sensitive proteins were identified as increased in pancreatic cancer sera supports the h...Continue Reading

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Citations

Oct 12, 2012·Applied Microbiology and Biotechnology·James R HockerJay S Hanas
Jan 6, 2010·Nature Reviews. Cancer·Magdalena ChechlinskaRadoslawa Nowak
Jun 10, 2011·Molecular & Cellular Proteomics : MCP·Shalini MakawitaEleftherios P Diamandis
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Jan 1, 2008·Toxicology Mechanisms and Methods·Jason L LarabeeJay S Hanas
Mar 18, 2010·Toxicology Mechanisms and Methods·Jay S HanasJames R Hocker
May 3, 2011·Lung Cancer : Journal of the International Association for the Study of Lung Cancer·James R HockerJay S Hanas
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