Tumor Biology

, Volume 36, Issue 7, pp 5109–5118 | Cite as

Identification of peptide regions of SERPINA1 and ENOSF1 and their protein expression as potential serum biomarkers for gastric cancer

  • Juan Yang
  • Xiaofan Xiong
  • Xiaofei Wang
  • Bo Guo
  • Kang He
  • Chen HuangEmail author
Research Article


This study aimed to detect potential serum biomarkers for gastric cancer. In the present study, we used magnetic bead-based purification and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry to detect potential serum markers in 70 gastric cancer (GC) patients compared with 72 healthy controls. On average, up to 81 peaks, of which 11 were significantly different m/z peaks (fold change >1.5; P < 0.001, Wilcoxon rank sum test) between GC group and healthy controls were detected. Two potential gastric serum biomarkers (m/z values of 1546.02 and 5335.08), with higher and specific expression in GC patients were further identified as peptide regions of SERPINA1 and ENOSF1. Enzyme-linked immunosorbent assays (ELISAs) were used to analyze 210 additional serum samples obtained from 36 healthy volunteers, 36 GC patients, 30 GU patients, 36 nonsmall-cell lung cancer (NSCLC) patients, 36 clear-cell renal cell carcinoma (CCRCC) patients, and 36 pancreatic cancer patients to verify the expression of SERPINA1 and ENOSF1 in GC sera. The suitability of the present method for gastric serum proteomic analysis was demonstrated and led to the identification of two peptide regions and their corresponding proteins as potential serum biomarkers for the serum detection of GC.


Gastric cancer Serum biomarkers SERPINA1 ENOSF1 


Conflicts of interest



This work was supported by the National Natural Science Foundation of China (grant number 81200845) and the Key Science and Technology Program of Shaanxi province (grant number 2012 K13-02-01).


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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Juan Yang
    • 1
  • Xiaofan Xiong
    • 1
  • Xiaofei Wang
    • 1
  • Bo Guo
    • 1
  • Kang He
    • 1
  • Chen Huang
    • 1
    Email author
  1. 1.Department of Genetics and Molecular BiologyMedical School of Xi’an Jiaotong UniversityXi’anChina

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