Inhibitory effect of RNA-mediated knockdown of zinc finger protein 91 pseudogene on pancreatic cancer cell growth and invasion.

Worldwide, human pancreatic cancer is a rare malignancy with a poor prognosis. Long non-coding RNAs (lncRNAs) are known to have a crucial role in cancer occurrence and progression; however, the role of pseudogene-expressed lncRNAs, a major type of lncRNA, have not been thoroughly analyzed in cancer. Therefore, the present study focused on zinc finger protein 91 pseudogene (-P). -P expression was initially detected in two pancreatic cancer cell lines by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and the highest expression of -P was found in the BXPC-3-H cell line. Subsequently, BXPC-3-H cells were transfected with -P short hairpin RNA (shRNA) using a plasmid vector and termed sh-P. Cells transfected with negative control plasmid vector were termed shCon. MTT and Transwell assays were performed to analyze the proliferation and migration of BXPC-3-H cells, respectively, and western blotting was used to detect epithelial-mesenchymal transition markers, including vimentin and β-catenin. The present study showed that depletion of -P markedly decreased pancreatic cancer cell proliferation and inhibited cell migration capacity. In addition, the expression of β-catenin increased while vimentin expression decreased. The current findings suggest that high expression of -P promotes the migration of BXPC-3-H cells and may be a novel marker for early diagnosis for pancreatic cancer.