CASC2 and cancer: LncRNA CASC2 have been demonstrated as playing crucial regulatory roles in a few of cancers, and functioned as endogenous RNA by sponging miRNAs, such as miR-18a [26], miR-367 [27], miR-21 [28], etc., so whether the CASC2 could function as a miR-144-3p decoy was verified by the RNA immunoprecipitation (RIP) and RNA pull-down assay in this study.