APOB and hepatocellular carcinoma: Additional evidence supporting the notion that HuR might regulate human APOB mRNA splicing is presented in Supplementary Fig. 22, where the results showed that HuR associated with intron 24 of human APOB pre-mRNA (Supplementary Fig. 22a) and silencing HuR in human hepatoma cells (HepG2) inhibited APOB mRNA splicing (Supplementary Fig. 22b).