[No authors listed]
Large intergenic noncoding RNA regulator of reprogramming (Linc-RoR) was first identified as a regulator to increase the emergence of induced pluripotent stem cells through reprogramming differentiated cells and is abnormal expression in a variety of malignant tumors. However, the function of Linc-RoR in pancreatic cancer progression needs further clarification. The data from this study demonstrated that Linc-RoR knockdown suppressed cell proliferative capacity and colony formation, while Linc-RoR overexpression promoted these behaviors. In particular, Linc-RoR overexpression promoted the level of mesenchymal markers, inhibited the expression of epithelial markers, as well as enhanced pancreatic cancer cells migration and invasion, whereas Linc-RoR knockdown inhibited the expression of mesenchymal markers, promoted the expression of epithelial markers, as well as weakened pancreatic cancer cells migration and invasion. Further study revealed that Linc-RoR knockdown brought about a significant fall in YAP phosphorylation and a rise in total YAP, while Linc-RoR overexpression produced the opposite results. Specifically, Linc-RoR promoted YAP in the cytoplasm into the nucleus. Taken together, we conjectured that Linc-RoR promoted proliferation, migration, and invasion of pancreatic cancer cells by activating the Hippo/YAP pathway. YAP might be an underlying target of Linc-RoR and mediate epithelial-mesenchymal transition (EMT) in pancreatic cancer (PC); thus, Linc-RoR might be a very meaningful biomarker for PC.
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