These five miRNAs were predicted to bind to the 3′UTR of both CYP4Z1 and the pseudogene CYP4Z2P, and KEGG enrichment showed that miRNAs in cancers were also enriched in MCF-7-six2 cells (data not shown), which suggested that six2 might regulate ceRNET_CC through the 3'UTR and shared miRNAs of CYP4Z1 and the pseudogene CYP4Z2P. Here, CYP4Z1 is linked to cancer.