HOXA9 and cancer: In addition, miR-641 [26] and HOXA9 [27] also participated in the regulation of drug resistance in cancers, and miR-641/HOXA9 axis could be regulated by circRNA CDR1as in NSCLC cells, which rendered the possibility that circRNA CDR1as regulated DDP chemoresistance in NSCLC cells by targeting miR-641/HOXA9 axis.