ZFAS1 and cancer: Competing endogenous RNAs (ceRNAs), a class of noncoding RNA, have been shown to modify the mRNA expression of genes by acting as miRNA sponges competing for mutual microRNAs, which simultaneously target both noncoding RNA and genes.38, 39 Several articles have demonstrated that ZFAS1 could function as a ceRNA to regulate the expression of specific genes by competing for specific microRNAs, exerting its oncogenic function in various cancers.