Identification of recurrence-related microRNAs in hepatocellular carcinoma following liver transplantation.

Molecular Oncology
Zhong-Bo HanZhi-Hai Peng

Abstract

Tumor recurrence-related microRNAs (miRNAs) in hepatocellular carcinoma (HCC) following orthotopic liver transplantation (OLT) are not clear yet. This study was designed to determine whether altered miRNA expression is associated with HCC recurrence and prognosis following OLT. 18 miRNAs, including 6 up-regulated and 12 down-regulated miRNAs were identified by microarray in primary HCC samples of patients who had developed HCC recurrence (n = 5) compared to those with non-recurrence (n = 5) following OLT by using p < 0.05 as cutoff value. The six most significantly altered miRNAs (fold change ≥ 2: miR-19a, miR-886-5p, miR-126, miR-223, miR-24 and miR-147) were further confirmed by qRT-PCR in the remaining 105 HCC samples. In receiver-operating characteristic curve analysis, this six miRNAs were of high sensitivity and specificity in predicting HCC recurrence. Using Cox regression and risk score analysis, we built a six-miRNA signature based on their qRT-PCR readings for the prediction of outcome of HCC following OLT. Kaplan-Meier and Cox proportional regression revealed this six-miRNA signature was a significant independent predictor of overall survival (log-rank p = 0.020) and recurrence-free survival (log-rank p < 0.001). Fin...Continue Reading

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