CDK1 and glioblastoma: Moreover, the significant positive correlation between SRSF9 and CDK1 expression in GBM tissues was observed via analyzing RNA sequencing data (n = 76) from our study (Wang et al. 2022a) (R = 0.83, p < 0.002; Fig. 5E), which was further validated in eight collected GBM clinical samples at mRNA levels (Fig. 5F–H) and protein levels (Fig. 5I–K, Fig. S3).