CDK1 and breast cancer: CDK1 is overexpressed in breast cancer and functions as a key regulatory factor during the G2/M phase of the cell cycle, thereby promoting tumorigenesis and cancer progression.[33, 34] Bioinformatics analysis showed that CDK1 is significantly overexpressed in breast cancer (Figure S4C, Supporting Information) and correlates with poor survival prognosis in breast cancer patients (Figure S4D, Supporting Information).