Analysis of circRNA-seq data from three paired BC tissues and matched nontumorous tissues [23] further indicated that circPTPRA (hsa_circ_0006117) and circSMARCA5 (hsa_circ_0001445) (Fig. 2c) were the differentially-expressed circRNAs that possess potential ability to bind with IGF2BP1 in BC cells. This evidence concerns the gene IGF2BP1 and breast cancer.