DKK1 and neoplasm: Regarding ceRNA networks, CLRN1 antisense RNA 1 (CLRN1-AS1)/miR-217/ Dickkopf-related protein 1 (DKK1) and H19/miR-93a/autophagy related 7 (ATG7) are the identified tumor suppressive ceRNA that suppresses miR-217 and miR-93a, respectively (Table 1).