Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 56, Issue 24, Pages 10045-10065Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jm401395s
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Funding
- Cancer Research UK [C309/A8274, C309/A11566]
- Breakthrough Breast Cancer
- NHS
- Cancer Research UK [11566] Funding Source: researchfish
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The protein kinase MPS1 is a crucial component of the spindle assembly checkpoint signal and is aberrantly over-expressed in many human cancers. MPS1 is one of the top 25 genes overexpressed in tumors with chromosomal instability and aneuploidy. PTEN-deficient breast tumor cells are particularly dependent upon MPS1 for their survival, making it a target of significant interest in oncology. We report the discovery and optimization of potent and selective MPS1 inhibitors based on the 1H-pyrrolo[3,2-c]pyridine scaffold, guided by structure-based design and cellular characterization of MPS1 inhibition, leading to 65 (CCT251455). This potent and selective chemical tool stabilizes an inactive conformation of MPS1 with the activation loop ordered in a manner incompatible with ATP and substrate-peptide binding; it displays a favorable oral pharmacokinetic profile, shows dose-dependent inhibition of MPS1 in an HCT116 human tumor xenograft model, and is an attractive tool compound to elucidate further the therapeutic potential of MPS1 inhibition.
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