ELAVL1 and hepatocellular carcinoma: Overexpressed circBACH1 activates the transport of human antigen R (HuR) from the nucleus to the cytoplasm, inhibiting p27 translation by abolishing the internal ribosome entry site (IRES) located at the 5’-UTR of p27, thereby promoting the proliferation of HCC cells and accelerating the cell cycle process (39).