Relevance of aneuploidy for cancer therapies targeting the spindle assembly checkpoint and KIF18A

Aneuploidy, a common feature of cancer cells, results in increased sensitivity to the inhibition of the spindle assembly checkpoint (SAC) and the mitotic motor protein Kinesin Family Member 18A (KIF18A). We discuss the importance of drugs targeting SAC core members and KIF18A. We stress the need to assess the sensitivity to this class of drugs at appropriate time points, and propose that aneuploidy could serve as a biomarker to stratify patients for SAC-targeting treatments.