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|Ref Type||Journal Article|
|Authors||Tardif KD, Rogers A, Cassiano J, Roth BL, Cimbora DM, McKinnon R, Peterson A, Douce TB, Robinson R, Dorweiler I, Davis T, Hess MA, Ostanin K, Papac DI, Baichwal V, McAlexander I, Willardsen JA, Saunders M, Christophe H, Kumar DV, Wettstein DA, Carlson RO, Williams BL|
|Title||Characterization of the cellular and antitumor effects of MPI-0479605, a small-molecule inhibitor of the mitotic kinase Mps1.|
|Abstract Text||Mps1 is a dual specificity protein kinase that is essential for the bipolar attachment of chromosomes to the mitotic spindle and for maintaining the spindle assembly checkpoint until all chromosomes are properly attached. Mps1 is expressed at high levels during mitosis and is abundantly expressed in cancer cells. Disruption of Mps1 function induces aneuploidy and cell death. We report the identification of MPI-0479605, a potent and selective ATP competitive inhibitor of Mps1. Cells treated with MPI-0479605 undergo aberrant mitosis, resulting in aneuploidy and formation of micronuclei. In cells with wild-type p53, this promotes the induction of a postmitotic checkpoint characterized by the ATM- and RAD3-related-dependent activation of the p53-p21 pathway. In both wild-type and p53 mutant cells lines, there is a growth arrest and inhibition of DNA synthesis. Subsequently, cells undergo mitotic catastrophe and/or an apoptotic response. In xenograft models, MPI-0479605 inhibits tumor growth, suggesting that drugs targeting Mps1 may have utility as novel cancer therapeutics.|
|Molecular Profile||Treatment Approach|
|Gene Name||Source||Synonyms||Protein Domains||Gene Description||Gene Role|
|Drug Name||Trade Name||Synonyms||Drug Classes||Drug Description|
|MPI-0479605||MPS1 Inhibitor 27||MPI-0479605, an ATP-competitive inhibitor of TTK (MPS1), derails the spindle assembly checkpoint to inhibit tumor growth (PMID: 21980130).|
|Gene||Variant||Impact||Protein Effect||Variant Description||Associated with drug Resistance|
|Molecular Profile||Indication/Tumor Type||Response Type||Therapy Name||Approval Status||Evidence Type||Efficacy Evidence||References|
|TP53 wild-type||colon carcinoma||sensitive||MPI-0479605||Preclinical||Actionable||In a preclinical study the TTK (MPS1) inhibitor, MPI-0479605, inhibited cell cycle progression of colon carcinoma cells deficient for Tp53 with equivalent efficacy to cells with wild-type Tp53 (PMID: 21980130).||21980130|
|TP53 loss||colon carcinoma||sensitive||MPI-0479605||Preclinical||Actionable||In a preclinical study the TTK (MPS1) inhibitor, MPI-0479605, inhibited cell cycle progression of colon carcinoma cells deficient for Tp53 with equivalent efficacy to cells with wild-type Tp53 (PMID: 21980130).||21980130|