Reduced serum exosomal miR-874 expression predicts poor prognosis in colorectal cancer.

OBJECTIVE:Emerging evidence has indicated that serum exosomal microRNAs (miRNAs) have promising diagnostic and prognostic value for colorectal cancer (CRC). This study aimed to detect serum exosomal miR-874 expression in CRC patients and assess its potential clinical significance. PATIENTS AND METHODS:Blood samples were collected from 125 CRC patients, 45 cases with benign adenomas (AD) and 70 healthy individuals. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) was performed to examine serum exosomal miR-874 levels. RESULTS:The results showed that serum exosomal miR-874 levels were significantly downregulated in CRC patients compared to AD cases and healthy controls. Receiver operating characteristic (ROC) curve analysis revealed that serum exosomal miR-874 expression could discriminate CRC patients from healthy controls, as well as patients with AD. In addition, low serum exosomal miR-874 expression was associated with positive distant metastasis, positive lymph node metastasis, poor differentiation, and advanced TNM stage. Moreover, serum exosomal miR-874 expression was identified as a statistically significant independent prognostic factor for overall survival of CRC patients. CONCLUSIONS:Collectively, serum exosomal miR-874 expression might serve as a reliable marker for CRC diagnosis and prognosis prediction.

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