Abstract
Cholangiocarcinoma (CCA) is a deadly disease that poorly responds to chemotherapy and radiotherapy and whose incidence has increased worldwide. Furthermore, long noncoding RNAs (lncRNAs) play important roles in multiple biological processes, including tumorigenesis. Specifically, H19, the first discovered lncRNA, has been reported to be overexpressed in diverse human carcinomas, but the overall biological role and clinical significance of H19 in CCA remains unknown. In the present study, expression levels of H19 were investigated in CCA tissues and cell lines and were correlated with clinicopathological features. Moreover, we explored the functional roles of H19 depletion in QBC939 and RBE cells, including cell proliferation, apoptosis, migration, invasion and epithelial-to-mesenchymal transition (EMT). The results indicated that H19 was upregulated in CCA tissue samples and cell lines, and this upregulation was associated with tumor size, TNM stage, postoperative recurrence and overall survival in 56 patients with CCA. Moreover, knockdown of H19 followed by RNA silencing restrained cell proliferation and promoted apoptosis. In addition, H19 suppression impaired migration and invasion potential by reversing EMT. Overall, our fi...Continue Reading
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