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Early detection is critical for the treatment of colon carcinoma. However, current biomarkers for its diagnosis and prognosis are insufficient and improvement is required. Aberrantly expressed microRNAs (miRNAs/miRs) in colon carcinoma have been identified to function as potential diagnostic and prognostic biomarkers. In the present study, 245 differentially expressed miRNAs between colon carcinoma and normal tissues were identified by a bioinformatics analysis of a dataset from The Cancer Genome Atlas. A six‑miRNA (miR‑149, miR‑3189, miR‑3677, miR‑3917, miR‑4999 and miR‑6854) prognostic prediction system was established, which is able to independently and effectively predict the prognosis of colon carcinoma patients [P&lt;0.001, area under the receiver operating characteristic curve (AUC)=0.763]. Furthermore, the six miRNAs were highly correlated with the tumor‑nodes‑metastasis (TNM) stage and were able to distinguish between different stages (high vs. low TNM stage, P&lt;0.001). Of note, combination of the six‑miRNA signature and TNM stage provides an improved prediction of the patient's prognosis (AUC=0.797). Functional enrichment analysis revealed the possible mechanistic involvement of these predictive miRNAs in cancer‑associated biological processes and pathways. Taken together, the present study demonstrated the promising potential of the novel six‑miRNA model as an independent factor for the prediction of the progression and prognosis of colon carcinoma.

MicroRNAs as biomarkers for the progression and prognosis of colon carcinoma