14Jul 2022
CDK4/6 blockade provides an alternative approach for treatment of mismatch-repair deficient tumors

CDK4/6 blockade provides an alternative approach for treatment of mismatch-repair deficient tumors

This study compared the therapeutic potential of an α-PD-L1 antibody with the CDK4/6 inhibitor abemaciclib in two preclinical mouse models of dMMR cancer, focusing on the immune-modulatory effects of either treatment. Therapeutic effects were accompanied by increasing tumour-infiltrating CD4+/CD8+ T-cells and lower numbers of M2 macrophages. In Mlh1−/− tumours, abemaciclib suppressed the PI3K/Akt pathway and led to the induction of Mxd4/Myc. The immune-modulatory potential of abemaciclib renders this compound ideal for dMMR patients not eligible for ICI treatment.

  • #oncology

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