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Publication Abstract from PubMed

Recently, selective inhibition of BET BD2 is emerging as a promising strategy for drug discovery. Despite significant progress in this area, systematic studies of selective BET BD2 inhibitors are still few. In this study, we report the discovery of a potent and selective BET BD2 inhibitor BY27 (47). Our high resolution co-crystal structures of 47/BRD2 BD1 and BD2 showed that the triazole group of 47, water molecules, H433 and N429 in BRD2 BD2 established a water-bridged H-bonding network, which is responsible for the observed selectivities. DNA microarray analysis of HepG2 cells treated with 47 or OTX015 demonstrated the transcriptome impact differences between a BET BD2 selective inhibitor and a pan BET inhibitor. In a MV4-11 mouse xenograft model, 47 caused 67% of tumor growth inhibition and was less toxic than a pan BET inhibitor 1 at high doses. We conclude that the improved safety profile of selective BET BD2 inhibitors warrant future studies in BET associated diseases.

Discovery, structural insight, and bioactivities of BY27 as a selective inhibitor of the second bromodomains of BET proteins.,Chen D, Lu T, Yan Z, Lu W, Zhou F, Lyu X, Xu B, Jiang H, Chen K, Luo C, Zhao Y Eur J Med Chem. 2019 Nov 15;182:111633. doi: 10.1016/j.ejmech.2019.111633. Epub , 2019 Aug 21. PMID:31461688^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.