Comparative glycomic profiling in esophageal adenocarcinoma

Zane T. Hammoud, Yehia Mechref, Ahmed Hussein, Slavka Bekesova, Min Zhang, Kenneth A. Kesler, Milos V. Novotny

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14 Scopus citations

Abstract

Objective: Aberrant glycosylation has been implicated in various types of cancers. Cancerous cells with altered glycosylation of their surface proteins shed such proteins into the circulating fluids. Glycomic profiling of such fluids shows the altered glycosylation. We performed glycomic profiling of serum from patients with no known disease, Barrett's without dysplasia, with high-grade dysplasia, and with esophageal adenocarcinoma in an attempt to delineate distinct differences in glycosylation among these groups. Methods: Serum samples from patients with Barrett's metaplasia (N = 5), high-grade dysplasia (N = 11), and esophageal adenocarcinoma (N = 50) were collected; samples from 18 healthy volunteers were used as control. Serum N-glycans were enzymatically released and then applied to both C18 Sep-Pak (Waters, Milford, MA) cartridges and activated charcoal cartridges. N-glycans were permethylated and then spotted directly onto a matrix-assisted laser desorption ionization plate. Mass spectra were acquired using the Applied Biosystems 4800 MALDI TOF/TOF Analyzer (Applied Biosystems Inc, Framingham, Mass). The obtained matrix-assisted laser desorption ionization-mass spectrometry data were processed using DataExplorer files (Applied Biosystems Inc) listing m/z values and intensities. Results: The intensities of 98 glycans were significantly different among the 3 groups; 26 of these corresponded to known glycan structures. Pairwise comparisons showed that 8 glycans were significantly different in all 3 pairwise comparisons. Conclusion: We demonstrated that comparative glycomic profiling of esophageal adenocarcinoma reveals a subset of glycans that can be selected as candidate biomarkers. These markers can differentiate normal from high-grade dysplasia, normal from esophageal adenocarcinoma, and high-grade dysplasia from esophageal adenocarcinoma. Further validation will be necessary to determine the clinical utility of these glycan biomarkers.

Original languageEnglish (US)
Pages (from-to)1216-1223
Number of pages8
JournalJournal of Thoracic and Cardiovascular Surgery
Volume139
Issue number5
DOIs
StatePublished - May 1 2010

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ASJC Scopus subject areas

  • Surgery
  • Pulmonary and Respiratory Medicine
  • Cardiology and Cardiovascular Medicine

Cite this

Hammoud, Z. T., Mechref, Y., Hussein, A., Bekesova, S., Zhang, M., Kesler, K. A., & Novotny, M. V. (2010). Comparative glycomic profiling in esophageal adenocarcinoma. Journal of Thoracic and Cardiovascular Surgery, 139(5), 1216-1223. https://doi.org/10.1016/j.jtcvs.2009.12.045