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EuPA Open Proteom. 2015 Mar 01;6:1-9. doi: 10.1016/j.euprot.2014.11.002.

The Serum Immunoglobulin G Glycosylation Signature of Gastric Cancer.

EuPA open proteomics

L Renee Ruhaak, Donald A Barkauskas, Javier Torres, Cara L Cooke, Lauren D Wu, Carol Stroble, Sureyya Ozcan, Cynthia C Williams, Margarita Camorlinga, David M Rocke, Carlito B Lebrilla, Jay V Solnick

Affiliations

  1. Department of Chemistry, University of California, Davis, CA, 95616.
  2. Department of Preventive Medicine, University of Southern California, Los Angeles, CA, 90089.
  3. Infectious Diseases Research Unit, Instituto Mexicano del Seguro Social, Mexico.
  4. Departments of Medicine and Microbiology & Immunology; Center for Comparative Medicine, University of California, Davis School of Medicine, Davis, CA, 95616.
  5. Department of Biomedical Engineering, University of California, Davis, CA, 95616 ; Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, CA, 95616.
  6. Department of Chemistry, University of California, Davis, CA, 95616 ; Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616.

PMID: 25685702 PMCID: PMC4322429 DOI: 10.1016/j.euprot.2014.11.002

Abstract

Biomarkers may facilitate detection of gastric cancer at an earlier stage and reduce mortality. Here we sought to determine if the glycosylation profile of serum immunoglobulin G (IgG) could distinguish patients with non-atrophic gastritis (NAG), duodenal ulcer (DU) and gastric cancer (GC). Serum IgG was released and analyzed using nano-LC-TOF mass spectrometry. Statistically significant false discovery rate (FDR)-adjusted p-values were observed for 18 glycans, eight that differed significantly between NAG and GC, three that distinguished NAG from DU, and eight that differed between DU and GC. The IgG glycosylation signature may be useful as a predictive marker for gastric cancer.

Keywords: Gastric cancer; N-glycan; duodenal ulcer; gastritis; nanoLC-MS; serum

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