CCNB2 and breast cancer: To explore the functional pathway (GSEA) and expression correlation of KPNA2 and its associated genes (FOXM1, CCNB1and CCNB2) with BC cell growth, we analyzed the RNA-seq data of BC patients from our series (Figure 1d), from the TCGA dataset (Figure 1e), and the GSE7390 dataset (Figure 1f, KPNA2 Probe: 201088_at and 211762_s_at), and then divided the patients into two groups, high and low KPNA2 expression.