CDKs are central regulators of cell-cycle progression in cancer, with resistance to CDK4/6 inhibitors frequently converging on CDK2 activation through cyclin E upregulation or CCNE1 amplification, supporting CDK2 inhibition as a strategy to restore cell-cycle control. Researchers from Novartis AG have revealed the preclinical profile of ECI-830, an oral bioavailable, highly selective ATP-competitive CDK2 inhibitor.