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Abstract  Long noncoding RNAs (lncRNAs) played an important role in tumorigenesis and development of hepatocellular carcinoma (HCC). In this study, we first demonstrated that lncRNA DLX6 antisense RNA 1 (DLX6‐AS1) was upregulated in cancer tissues and cells lines compared with normal adjacent and cell line. Knock‐down DLX6‐AS1 by transfection with small interfering RNA (siRNA) suppressed cell proliferation, migration, and invasion of HCC cells. Cell cycle analysis showed that cells transfected with siRNA were arrested in G0/G1 phase. Then, we performed dual‐luciferase reporter assay and RNA immunoprecipitation (RIP) assay to show that DLX6‐AS1 could bind with miR‐424‐5p. And cotransfection inhibitor of miR‐424‐5p with siRNA of DLX6‐AS1 could abolish the inhibitory effect of siRNA of DLX6‐AS1 on cell proliferation, migration, and invasion. Moreover, we further demonstrated that the oncogene WEE1 G2 checkpoint kinase (WEE1) was the target of miR‐424‐5p and expression levels of WEE1 were positive correlation with that of DLX6‐AS1. Taken together, these results suggested that upregulated DLX6‐AS1 promoted cell proliferation, migration, and invasion of HCC through increasing expression of WEE1 via targeting miR‐424‐5p.

Long noncoding RNA DLX6‐AS1 promotes liver cancer by increasing the expression of WEE1 via targeting miR‐424‐5p