Discovery of DDO-2213 as a Potent and Orally Bioavailable Inhibitor of the WDR5-Mixed Lineage Leukemia 1 Protein-Protein Interaction for the Treatment of MLL Fusion Leukemia.

Journal of Medicinal Chemistry
Wei-Lin ChenXiaoke Guo

Abstract

WD repeat-containing protein 5 (WDR5) is essential for the stability and methyltransferase activity of the mixed lineage leukemia 1 (MLL1) complex. Dysregulation of the MLL1 gene is associated with human acute leukemias, and the direct disruption of the WDR5-MLL1 protein-protein interaction (PPI) is emerging as an alternative strategy for MLL-rearranged cancers. Here, we represent a new aniline pyrimidine scaffold for WDR5-MLL1 inhibitors. A comprehensive structure-activity analysis identified a potent inhibitor 63 (DDO-2213), with an IC50 of 29 nM in a competitive fluorescence polarization assay and a Kd value of 72.9 nM for the WDR5 protein. Compound 63 selectively inhibited MLL histone methyltransferase activity and the proliferation of MLL translocation-harboring cells. Furthermore, 63 displayed good pharmacokinetic properties and suppressed the growth of MV4-11 xenograft tumors in mice after oral administration, first verifying the in vivo efficacy of targeting the WDR5-MLL1 PPI by small molecules.

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Citations

Jul 21, 2021·Journal of Medicinal Chemistry·Xin ChenXiaoke Guo

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