HIPK3 Circular RNA Promotes Metastases of HCC Through Sponging miR-338-3p to Induce ZEB2 Expression.

Background: Upregulation of circHIPK3 has been observed in several kinds of malignancies. However, the mechanisms of circHIPK3 in HCC metastases remains unclear. We investigated the role and the mechanisms of circHIPK3 in the development of HCC.
Methods: HCC tissues and paired adjacent non-tumor tissues of surgical patients were used to evaluate circHIPK3 expression. A series of biological experiments had been taken to evaluate the pro-metastatic ability of circHIPK3 during HCC development in vitro and in vivo. The potential mechanisms of circHIPK3 in HCC development were identified by RT-qPCR, Western blot, RIP, and luciferase reporter assays.
Results: CircHIPK3 expression is significantly upregulated during HCC development. Overexpression of circHIPK3 promotes cell migration, invasion, and metastases in vitro and in vivo. CircHIPK3 promoted HCC metastases by sponging miR-338-3p to regulate EMT-associated proteins E-cadherin, vimentin, and ZEB2 expression.
Conclusion: CircHIPK3 plays a regulatory role in metastatic HCC by sponging miR-338-3p to induce ZEB2 expression, thus promoting EMT procession.
(© 2020. Springer Science+Business Media, LLC, part of Springer Nature.)