Abstract
Using microarray analysis, we previously showed that many lncRNAs are differentially expressed in colorectal cancer (CRC) tissues compared with normal tissues, suggesting that lncRNAs may be involved the initiation and progression of CRC. In this study, we investigated the expression and function of lncRNA-RP11-317J10.2 in human CRC tissues and cell lines. LncRNA-RP11-317J10.2 expression level was analyzed in 52 colon cancer and cell lines. We used shRNA to knock-down the expression of RP11-317J10.2, and then proliferation assay, colony formation assay, Boyden chamber assay, FACS and Kaplan-Meier survival analysis were performed to explore the biological effect of RP11-317J10.2. Cyclin D1 protein level was detected by Western blot. LncRNA-RP11-317J10.2 is downregulated in CRC and decreased expression is significantly associated with advanced tumor stage, larger tumor size and poor prognosis. RNA interference-mediated knockdown of lncRNA-RP11-317J10.2 in CRC cells promotes G1-to-S cell cycle transition, enhances invasiveness and facilitates cell growth in vitro and in mouse tumor xenograft models. Cyclin D1 was upregulated by lncRNA-RP11-317J10.2 knockdown, and co-expression of cyclin D1-targeting siRNA abrogates the pro-tumorig...Continue Reading
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