Abstract
Emerging evidences exposed that long noncoding RNAs (lncRNAs) play important roles in various tumor progression including breast cancer (BC). However, the role of lncRNA ADP-dependent glucokinase antisense RNA 1 (ADPGK-AS1) in BC progression remains undiscovered. Hence, this study aimed to investigate the role of ADPGK-AS1 in BC. qRT-PCR was performed to investigate ADPGK-AS1 expression level in BC tissues and cell lines. The effect of ADPGK-AS1 knockdown on BC cellular process was assessed by loss-of-function assay. Luciferase reporter and RIP assay were performed to investigate the combination between ADPGK-AS1 and miR-3196. The combination between miR-3196 and orthodenticle homeobox 1 (OTX1) was verified by luciferase reporter assay. Finally, rescue assays were performed to confirm the effects of ADPGK-AS1/miR-3196/OTX1 axis on BC development. ADPGK-AS1 expression level was upregulated in BC tissues and cell lines. High expression of ADPGK-AS1 predicted poor prognosis for BC patients. Functionally, ADPGK-AS1 promoted cell proliferation, migration, induced epithelial-mesenchymal transition (EMT) process, and suppressed cell apoptosis. Mechanistically, ADPGK-AS1 acted as a miR-3196 sponge to release OTX1 in BC cells. Currently, ADPGK-AS1 acted as a competing endogenous RNA (ceRNA) via modulating miR-3196/OTX1 axis in BC.
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