Ren H, Du N, Zhang J, Yao J, Shi JS. Variabilities of serum proteomic spectra in patients with gastric cancer before and after operation.
Shijie Huaren Xiaohua Zazhi 2008;
16:314-318. [DOI:
10.11569/wcjd.v16.i3.314]
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Abstract
AIM: To study the variabilities of serum proteomic spectra in patients with gastric cancer before and after operation in order to detect specific protein markers that can be used in the rapid diagnosis of gastric cancer.
METHODS: Proteomic spectra of 46 serum samples from patients with gastric cancer before and after operation and 40 from normal individuals were generated by IMAC-Cu protein chip and surface-enhanced laser desorption/ionization time of flight mass spectrometry (SELDI-TOF-MS).
RESULTS: Fourteen differentially expressed proteins in serum were screened by analysis of proteomic spectra in preoperative patients and normal individuals. We obtained 4 proteins (heat shock protein 27, glucose-regulated protein, prohibitin, protein disulfide isomerase A3) as markers able to classify gastric cancer patients and normal individuals. The sensitivity and specificity of these markers were 95.7% and 92.5%, respectively. The proteins over-expressed in serum of preoperative patients were obviously down-regulated.
CONCLUSION: Specific proteinic markers of gastric cancer can be detected in serum and used both in the rapid diagnosis of gastric cancer and in the judgment of prognosis. SELDI-TOF-MS is a useful tool for the detection and identification of new protein markers in serum.
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