NSPc1 polycomb protein complex binds and cross ‑talks to lncRNAs in glioma H4 cells.

NSPc1 polycomb protein complex binds and cross‑talks to lncRNAs in glioma H4 cells. Oncol Rep. 2019 Feb 05;: Authors: Wang Y, Liang Z, Li H, Tao J, Sun Y, Gong Y Abstract Recently, emerging evidence shows that a number of long non‑coding RNAs (lncRNAs) recruit polycomb group (PcG) proteins to specific chromatin loci to silence relevant gene expression. In the present study, we provided evidence that lncRNA candidates, selected by bioinformatic analysis and nervous system polycomb 1 (NSPc1), a key polycomb repressive complex 1 (PRC1) member, were highly expressed in glioma H4 cells in contrast to that noted in non‑cancerous cells. RNA binding protein immunoprecipitation (RIP) assays demonstrated that metastasis associated lung adenocarcinoma transcript 1 (MALAT1), SOX2 overlapping transcript (SOX2OT) and maternally expressed 3 (MEG3) among the 8 candidates bound to the NSPc1 protein complex in glioma H4 cells. Furthermore, overexpression of NSPc1 caused a decrease in the expression of MALAT1 and MEG3 and increased expression of SOX2OT, while NSPc1 downregulation caused the levels of all three genes to increase. Meanwhile, suppression of the expression of MALAT1 increased the expression levels of mRNA and protein of NSPc1, whereas downregulation of the expression of SOX2OT decreased NSPc1 expression. Moreover, a significant decrease in cell growth and increased cell apoptosis were observed in the transfected H4 cells by MTT assay...
Source: Oncology Reports - Category: Cancer & Oncology Tags: Oncol Rep Source Type: research