Abstract
The biological functions of circular RNAs in liver tumorigenesis have been well demonstrated by a number of studies. Nevertheless, to the best of our knowledge, the role and mechanism of action of hsa_circ_0008537 (circ_0008537) in liver cancer pathogenesis remain undetermined. In the present study, circ_0008537 expression was associated with the GLI3 gene and was markedly increased in liver cancer tissue specimens and cells. High expression levels of circ_0008537 exhibited a poor prognosis. In addition, circ_0008537 overexpression resulted in an increased proliferation, migration and invasion of liver cancer cells, whereas circ_0008537 knockdown exhibited opposite effects. circ_0008537 acted as a sponge of microRNA‑153‑3p (miR‑153‑3p), and a negative correlation was observed between circ_0008537 and miR‑153‑3p expression in liver cancer. Transfection with miR‑153‑3p further abolished the effects of circ_0008537 on the malignant behavior of liver cancer cells. Furthermore, circ_0008537 indirectly affected the expression levels of pro‑survival protein myeloid cell leukemia 1 (MCL1) and snail family zinc finger 1 (Snail1) via miR‑153‑3p in liver cancer cells. In conclusion, the data indicated that circ_0008537 facilitated liver carcinogenesis by indirectly regulating miR‑153‑3p and leading to the release of MCL1 and Snail1.
Keywords:
liver cancer; circ_0008537; miR-153-3p; MCL1; Snail1.