Combined assays for serum carcinoembryonic antigen and microRNA‑17-3p offer improved diagnostic potential for stage I/II colon cancer

  • Authors:
    • Jinhai Zhu
    • Huiming Dong
    • Qiong Zhang
    • Shangwu Zhang
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  • Published online on: July 30, 2015     https://doi.org/10.3892/mco.2015.616
  • Pages: 1315-1318
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Abstract

Colorectal cancer is among the leading causes of cancer-related mortality, one of the main reasons for which is the lack of an effective screening method for early‑stage disease. The levels of carcinoembryonic antigen (CEA) and microRNA (mir)-17-3p in the serum of 70 patients with stage I̸II colon cancer and 70 healthy volunteers were determined, and the diagnostic value of CEA plus miR-17-3p detection for colon cancer was assessed. The levels of CEA were measured by a radioimmunoassay method, and those of miR-17-3p using the reverse transcription-quantitative polymerase chain reaction method. miR-16 was used as the endogenous control, as it displayed high stability, high abundance and low variability in the analyzed serum samples. The receiver operating characteristic (ROC) curve analysis indicated the potential diagnostic value of the two markers and the area under the ROC curve (AUC) for CEA and miR-17-3p was 0.719 (95% CI: 0.658‑0.843) and 0.807 (95% CI: 0.748‑0.906), respectively. At a threshold of 9.6 ng/ml for CEA, the optimal sensitivity and specificity were 74.6 and 84.3%, respectively, in discriminating colon cancer patients from healthy controls. At a threshold of 2.98 for miR-17-3p, the sensitivity and the specificity were 83.6 and 72.9%, respectively. A combined ROC analysis using CEA and miR-17-3p revealed an AUC of 0.929 (95% CI: 0.834-0.978) with a sensitivity of 96.4% and a specificity of 95.7% in discriminating colon cancer patients from healthy controls. In conclusion, both CEA and miR-17-3p were highly expressed in the serum of our series of colon cancer patients. CEA plus miR-17-3p detection significantly increased the sensitivity and specificity in discriminating stage I/II colon cancer patients from healthy controls. Therefore, combined detection of serum CEA and miR-17-3p levels may have the potential to become a new laboratory method for the early clinical diagnosis of colon cancer.
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November-2015
Volume 3 Issue 6

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Spandidos Publications style
Zhu J, Dong H, Zhang Q and Zhang S: Combined assays for serum carcinoembryonic antigen and microRNA‑17-3p offer improved diagnostic potential for stage I/II colon cancer. Mol Clin Oncol 3: 1315-1318, 2015
APA
Zhu, J., Dong, H., Zhang, Q., & Zhang, S. (2015). Combined assays for serum carcinoembryonic antigen and microRNA‑17-3p offer improved diagnostic potential for stage I/II colon cancer. Molecular and Clinical Oncology, 3, 1315-1318. https://doi.org/10.3892/mco.2015.616
MLA
Zhu, J., Dong, H., Zhang, Q., Zhang, S."Combined assays for serum carcinoembryonic antigen and microRNA‑17-3p offer improved diagnostic potential for stage I/II colon cancer". Molecular and Clinical Oncology 3.6 (2015): 1315-1318.
Chicago
Zhu, J., Dong, H., Zhang, Q., Zhang, S."Combined assays for serum carcinoembryonic antigen and microRNA‑17-3p offer improved diagnostic potential for stage I/II colon cancer". Molecular and Clinical Oncology 3, no. 6 (2015): 1315-1318. https://doi.org/10.3892/mco.2015.616