Wei W, Shang XJ, Lv BZ. Serum proteomic analysis of hereditary nonpolyposis colorectal cancer.
Shijie Huaren Xiaohua Zazhi 2011;
19:1417-1421. [DOI:
10.11569/wcjd.v19.i13.1417]
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Abstract
AIM: To identify differentially expressed serum proteins between preoperative patients with hereditary nonpolyposis colorectal cancer (HNPCC) and those with sporadic colorectal cancer to find potential markers for the diagnosis of HNPCC.
METHODS: The composition of serum proteins was detected by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF-MS) and protein chip assay in 20 preoperative HNPCC patients and 25 patients with sporadic colorectal cancer. Discriminatory serum protein profiles were analyzed with the Biomarker Wizard software and Biomarker Pattern software.
RESULTS: Two proteins (m/z 7 516.68 Da and 4 827.07 Da) were chosen to create a decision classification tree model which could discriminate the two groups of patients. In the test mode, the accuracy, sensitivity, specificity, and positive predictive value of the model for prediction of HNPCC was 86.7%, 72.3%, 95.1% and 92.5%, respectively, while the corresponding values for blinded validation were 75.6%, 100%, 69.8% and 99.2%, respectively.
CONCLUSION: The classification tree model constructed with two differentially expressed proteins identified by SELDI-TOF-MS between HNPCC patients and patients with sporadic colorectal cancer possesses high sensitivity and specificity in the prediction of HNPCC.
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