[No authors listed]
DHX15 is an outstanding member of the DEAH-box RNA helicase family. A few studies suggest that DHX15 contributes to carcinogenesis in several tumor cell lines. However, whether DHX15 acts as an oncogene or tumor suppressor and its association with hepatocellular carcinoma (HCC) prognosis are still poorly understood. To address this question, we used immunohistochemistry to evaluate DHX15 expression patterns and their association with clinicopathological factors and the prognosis of patients with HCC. Our results showed that DHX15 expression was significantly higher in cancerous tissues than that in nontumor tissues (Pâ¯<â¯.0001). DHX15 expression in HCC patients was associated with differentiation status (Pâ¯=â¯.018), tumor number (Pâ¯=â¯.048), intrahepatic or extrahepatic metastasis (Pâ¯=â¯.001), serum α-fetoprotein (Pâ¯=â¯.006), hepatitis B virus level (Pâ¯=â¯.018), and recurrence (Pâ¯<â¯.001). In addition, the survival analysis revealed that the DHX15-high group had significantly decreased overall survival time (Pâ¯=â¯.004) and lower 1-year survival rates (Pâ¯=â¯.002) compared with the DHX15-low group. Furthermore, multivariate analysis identified DHX15 expression as an independent factor associated with poor prognosis in HCC (Pâ¯=â¯.036). In summary, these findings demonstrate, for the first time, that DHX15 is significantly upregulated in HCC and its high expression was correlated with poor prognosis, suggesting its pivotal role in the progression of HCC. The present results suggest that DHX15 may serve as a potential prognostic biomarker for HCC patients.
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