Gliomas are the most common malignant tumor in the central nervous system and are also one of the leading causes of death in cancer patients. Recently, mounting evidence suggested that both long noncoding RNAs (lncRNAs) and microRNAs play important roles in the proliferation and invasion of cancers, including gliomas. However, the role of lncRNA RP11‐626G11.3 in glioma‐genesis is still uncovered. Results indicated that lncRNA RP11‐626G11.3 was up‐regulated in glioma tissues and cell lines, moreover, its overexpression positively correlated with the poor prognosis and advanced pathological stages. Gain and loss of functional experiments demonstrated that lncRNA RP11‐626G11.3 promoted the proliferation and invasion of glioma cells in vitro. The knockdown of lncRNA RP11‐626G11.3 repressed the tumor growth in vivo. Mechanistically, lncRNA RP11‐626G11.3 positively regulated the SP1 expression via competitively sponging with miR‐375. Overall, our study shows that lncRNA RP11‐626G11.3 promotes glioma progression by sponging miR‐375 to regulate SP1 expression, which may provide a novel therapeutic strategy for glioma.
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