Serum glycan signatures of gastric cancer

Sureyya Ozcan, Donald A. Barkauskas, L. Renee Ruhaak, Javier Torres, Cara L. Cooke, Hyun Joo An, Serenus Hua, Cynthia C. Williams, Lauren M. Dimapasoc, Jae Han Kim, Margarita Camorlinga-Ponce, David M Rocke, Carlito B Lebrilla, Jay V Solnick

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Glycomics, a comprehensive study of glycans expressed in biologic systems, is emerging as a simple yet highly sensitive diagnostic tool for disease onset and progression. This study aimed to use glycomics to investigate glycan markers that would differentiate patients with gastric cancer from those with nonatrophic gastritis. Patients with duodenal ulcer were also included because they are thought to represent a biologically different response to infection with Helicobacter pylori, a bacterial infection that can cause either gastric cancer or duodenal ulcer. We collected 72 serum samples from patients in Mexico City that presented with nonatrophic gastritis, duodenal ulcer, or gastric cancer. N-glycans were released from serum samples using the generic method with PNGase F and were analyzed by matrix-assisted laser desorption/ionization Fourier transform-ion cyclotron resonance mass spectrometry. The corresponding glycan compositions were calculated based on accurate mass. ANOVA-based statistical analysis was performed to identify potential markers for each subgroup. Nineteen glycans were significantly different among the diagnostic groups. Generally, decreased levels of high-mannose-type glycans, glycans with one complex type antenna, bigalactosylated biantennary glycans, and increased levels of nongalactosylated biantennary glycans were observed in gastric cancer cases. Altered levels of serum glycans were also observed in duodenal ulcer, but differences were generally in the same direction as gastric cancer. Serum glycan profiles may provide biomarkers to differentiate gastric cancer cases from controls with nonatrophic gastritis. Further studies will be needed to validate these findings as biomarkers and identify the role of protein glycosylation in gastric cancer pathology.

Original languageEnglish (US)
Pages (from-to)226-235
Number of pages10
JournalCancer Prevention Research
Volume7
Issue number2
DOIs
StatePublished - Feb 2014

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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