05 August 2019 : Meta-Analysis
Diagnostic Value and Clinical Significance of Methylated SEPT9 for Colorectal Cancer: A Meta-AnalysisJincui Hu1CDE, Bangli Hu2C, Yu-chang Gui1EF, Zhi-biao Tan1DF, Jian-wen Xu1AE*
Med Sci Monit 2019; 25:5813-5822
BACKGROUND: This meta-analysis aimed to clarify the diagnostic role of plasma methylated SEPT9 (mSEPT9) in colorectal cancer (CRC) and examined its association with CRC.
MATERIAL AND METHODS: A systematic review was conducted prior to July 2018. Summary sensitivity, specificity, and positive and negative likelihood ratio (PLR/NLR) were calculated for the diagnostic value of mSEPT9 for CRC. The areas under the receiver operating curves (AUCs) were used to summarize the overall test performance.
RESULTS: Twenty-two studies with 2271 CRC patients were enrolled. The summary sensitivity, specificity, PLR, NLR, DOR, and AUC of the overall analysis of mSEPT9 were 0.69, 0.92, 8.1, 0.34, 24, and 0.89, respectively. Subgroup and meta-regression analyses demonstrated that the diagnostic value was higher for the Epi proColon 2.0 assay, Asian ethnicity, and mSEPT9 test combined with fecal occult blood test (FOBT) or fecal immunochemical test (FIT) than for other test methods, white ethnicity, and mSEPT9 test alone. The rate of mSEPT9 positivity was higher in advanced CRC cases compared with early-stage CRC cases, and was higher in CRC cases than in adenoma cases. No significant difference in mSEPT9 positivity rate was found between left- and right-sided CRC.
CONCLUSIONS: Plasma mSEPT9 has a high diagnostic value for CRC, especially on the newly developed Epi proColon test 2.0 method. The diagnostic sensitivity is superior among Asians compared to whites, and the combination of mSEPT9 and FOBT/FIT has a better performance than mSEPT9 alone. Finally, the expression of mSEPT9 is associated with CRC stage but not with location.
Keywords: Colorectal Neoplasms, Meta-Analysis as Topic, O(6)-Methylguanine-DNA Methyltransferase, Adenoma, Area Under Curve, Biomarkers, Tumor, Colonic Neoplasms, DNA Methylation, Early Detection of Cancer, Neoplasm Staging, Prognosis, Sensitivity and Specificity, Septins
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