ABL2 and gastric cancer: In this study, we analyzed the Gene Expression Omnibus (GEO) database (http://www.ncbi.nlm.nih.gov/gds/) (GSE100170, GSE152309, GSE163416 and GSE131414) demonstrated that has_circ_00015430 (named circRNA_15430) that localized to ABL2 gene may play a significant role in GC progression, and found it was down-regulated in GC tissues and cell lines.