TY - JOUR
T1 - Deregulated expression of microRNA-221 with the potential for prognostic biomarkers in surgically resected hepatocellular carcinoma
AU - Yoon, Sun Och
AU - Chun, Sung Min
AU - Han, Eun Hee
AU - Choi, Jene
AU - Jang, Se Jin
AU - Koh, Seung A.
AU - Hwang, Shin
AU - Yu, Eunsil
PY - 2011/10/1
Y1 - 2011/10/1
N2 - Aberrant expression of specific microRNAs in hepatocellular carcinomas has recently been reported. We examined expression patterns of 4 microRNAs (microRNA-221, microRNA-222, microRNA-21, and microRNA-155) to evaluate their potential as relevant biomarkers by quantitative real-time reverse transcriptase-polymerase chain reaction using formalin-fixed, paraffin-embedded tissues of 115 surgically resected hepatocellular carcinoma and paired nonneoplastic liver cases as well as 21 normal liver samples from cancer-free individuals. MicroRNA-221, microRNA-222, and microRNA-21 were differentially overexpressed in hepatocellular carcinoma compared with nonneoplastic and normal livers (P <.001). The mean fold changes in microRNA-221, microRNA-222, and microRNA-21(hepatocellular carcinoma to matched nonneoplastic liver) were 4.00, 4.44, and, 3.67, respectively. In addition, nonneoplastic liver tissues displayed higher levels of microRNA-221, microRNA-222, microRNA-21, and microRNA-155 than normal livers (P <.001, respectively). However, the overexpression of the 4 microRNAs showed no consistent relevance to the known prognostic clinicopathologic parameters. High expression of microRNA-221 in hepatocellular carcinomas was significantly related to shorter time to local recurrence (P <.001) and determined as an independent predictor for local recurrence (P =.001). The fold changes in microRNA-221 (hepatocellular carcinoma to matched nonneoplastic liver) less than 1 were more commonly detected in cases of distant metastases than those of disease-free and local recurrence (P =.009). The fold changes less than 1 were related to reduced metastasis-free survival (P =.006) and thus can be used as an independent predictor of distant metastasis after surgical resection (P =.027). Based on these results, we propose the possible role of microRNA-221, microRNA-222, microRNA-21, and microRNA-155 dysregulation in hepatocarcinogenesis and the potential of microRNA-221 dysregulation for predicting local recurrence and distant metastasis after curative surgery.
AB - Aberrant expression of specific microRNAs in hepatocellular carcinomas has recently been reported. We examined expression patterns of 4 microRNAs (microRNA-221, microRNA-222, microRNA-21, and microRNA-155) to evaluate their potential as relevant biomarkers by quantitative real-time reverse transcriptase-polymerase chain reaction using formalin-fixed, paraffin-embedded tissues of 115 surgically resected hepatocellular carcinoma and paired nonneoplastic liver cases as well as 21 normal liver samples from cancer-free individuals. MicroRNA-221, microRNA-222, and microRNA-21 were differentially overexpressed in hepatocellular carcinoma compared with nonneoplastic and normal livers (P <.001). The mean fold changes in microRNA-221, microRNA-222, and microRNA-21(hepatocellular carcinoma to matched nonneoplastic liver) were 4.00, 4.44, and, 3.67, respectively. In addition, nonneoplastic liver tissues displayed higher levels of microRNA-221, microRNA-222, microRNA-21, and microRNA-155 than normal livers (P <.001, respectively). However, the overexpression of the 4 microRNAs showed no consistent relevance to the known prognostic clinicopathologic parameters. High expression of microRNA-221 in hepatocellular carcinomas was significantly related to shorter time to local recurrence (P <.001) and determined as an independent predictor for local recurrence (P =.001). The fold changes in microRNA-221 (hepatocellular carcinoma to matched nonneoplastic liver) less than 1 were more commonly detected in cases of distant metastases than those of disease-free and local recurrence (P =.009). The fold changes less than 1 were related to reduced metastasis-free survival (P =.006) and thus can be used as an independent predictor of distant metastasis after surgical resection (P =.027). Based on these results, we propose the possible role of microRNA-221, microRNA-222, microRNA-21, and microRNA-155 dysregulation in hepatocarcinogenesis and the potential of microRNA-221 dysregulation for predicting local recurrence and distant metastasis after curative surgery.
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U2 - 10.1016/j.humpath.2010.12.010
DO - 10.1016/j.humpath.2010.12.010
M3 - Article
C2 - 21458843
AN - SCOPUS:80053184413
VL - 42
SP - 1391
EP - 1400
JO - Human Pathology
JF - Human Pathology
SN - 0046-8177
IS - 10
ER -