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eISSN: 1643-3750

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Low Serum Levels of miR-101 Are Associated with Poor Prognosis of Colorectal Cancer Patients After Curative Resection

Dedong He, Zhongyi Yue, Guangjun Li, Liping Chen, Hailong Feng, Jianwei Sun

(Department of General Surgery, First Affiliated Hospital of Xin-Xiang Medical University, Xin-Xiang, Henan, China (mainland))

Med Sci Monit 2018; 24:7475-7481

DOI: 10.12659/MSM.909768


BACKGROUND: Recent studies showed low expression of microRNA (miR)-101 in various malignancies. However, the association of serum miR-101 and colorectal cancer (CRC) remains unknown. We investigated diagnostic and prognostic significance of serum miR-101 in CRC.
MATERIAL AND METHODS: A total of 263 consecutive CRC patients and 126 healthy controls were enrolled in this study. Serum miR-101 levels were measured using real-time quantitative reverse transcription polymerase chain reactions. The association between serum miR-101 level and survival outcome was analyzed.
RESULTS: Serum miR-101 in CRC patients was significantly lower than in healthy volunteers (P<0.001). Low serum miR-101 level was significantly associated with advanced cancer stage. Moreover, survival analysis demonstrated that patients with a low serum miR-101 had poorer 5-year overall survival than patients with a high serum miR-101 level (p=0.041). Serum miR-101 level also were confirmed as an independent risk factor for CRC in multivariate analysis (hazard ratio, 1.468; 95%CI, 0.981–1.976; p<0.001).
CONCLUSIONS: Serum miR-101 level was significantly downregulated in CRC patients and was closely correlated with poor clinical outcome, suggesting that serum miR-101 might be a useful diagnostic and prognostic marker for CRC.

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