Long non-coding RNAs (lncRNAs) are involved in the occurrence and development of human cancers including lung adenocarcinoma (LUAD). SLC2A1-AS1 is a novel lncRNA that has been reported to be exceptionally expressed in several cancer types. However, the expression and role of SLC2A1-AS1 in cancer remains largely unclear. In this study, it was revealed that lncRNA SLC2A1-AS1 was notably over-expressed in LUAD and was closely correlated with patients' overall survival (OS). Knockdown of SLC2A1-AS1 could significantly restrain cell proliferation of LUAD , while over-expression of SLC2A1-AS1 had the accelerative effect. SLC2A1-AS1 enriched in the cytoplasm of LUAD cells could directly bind to miR-508-5p and negatively regulate its level. The inhibitory effect of miR-508-5p on LUAD cell proliferation was in part abrogated by SLC2A1-AS1 manipulation. Moreover, the transcription factor activating enhancer binding protein 2 α (TFAP2A) was highly expressed in LUAD and predicted worse patients' OS. TFAP2A could directly bind to the promoter region of SLC2A1-AS1 encoding gene and positively regulate the transcription of SLC2A1-AS1 in LUAD cells. Furthermore, TFAP2A-induced SLC2A1-AS1 promoted cell proliferation of lung squamous cell carcinoma (LUSC) and pancreatic adenocarcinoma (PAAD). Collectively, these findings suggest that TFAP2A-mediated lncRNA SLC2A1-AS1 works as an oncogene to drive cancer cell proliferation.
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