lncRNA GAS5 (growth arrest–specific 5) functions as a competitive endogenous RNA (ceRNA) and regulates the cellular level of mature miR-18a-5p in glioma. The interaction between GAS5:miR-18a-5p has functional consequences by influence on expression level of miR-18a-5p target neogenin. Moreover, miR-18a-5p reduces the level of GAS5, so the feed-back loop between oncmiR and lncRNA suppressor keeps specific balance in the cell. (32884453)