LINC00922 promotes the proliferation, migration, invasion and EMT process of liver cancer cells by regulating miR-424-5p/ARK5.

AMPK-related protein kinase 5 (ARK5) promotes the deterioration of hepatocellular carcinoma (HCC). From the perspective of lncRNA-miRNA-mRNA, this study explored in-depth the intervention mechanism of ARK5. The binding relationship between miR-424-5p and two genes (LINC00922 and ARK5) were analyzed by Bioinformatics and dual-luciferase experiments. After clinical sample collection, the expressions of miR-424-5p, LINC00922 and ARK5 in HCC tissues were analyzed by quantitative real-time polymerase chain reaction (qRT-PCR). The correlation between LINC00922, miR-424-5p, and ARK5 in HCC tissues was analyzed by Pearson correlation. The influences of miR-424-5p, LINC00922 and ARK5 on the basic functions (viability, migration and invasion) of cancer cells were detected by cell counting kit-8, wound healing, and Transwell experiments, and their regulatory effects on related genes, as well as their relationship, were tested by qRT-PCR and Western blot. MiR-424-5p was low expressed, whereas LINC00922 and ARK5 were high expressed in HCC tissues. MiR-424-5p was negatively associated with LINC00922 and ARK5 that was positively associated with LINC00922. Interestingly, LINC00922 partially shared an identical binding site of miR-424-5p with ARK5. LINC00922 its overexpression partially offset the inhibitory effect of miR-424-5p on cancer cell functions. ARK5 silencing repressed the malignant phenotype of cancer cells and inhibited the expressions of epithelial-to-mesenchymal transition (EMT)-related molecules (Vimentin, Snail and N-Cadherin). However, these effects were partially neutralized by miR-424-5p inhibitors. LINC00922 increases the cell viability, migration, invasion and EMT process of HCC cells by regulating the miR-424-5p/ARK5 axis, and thus may serve as a potential target for targeted therapy.