2. Academic Validation
  3. Discovery, structural insight, and bioactivities of BY27 as a selective inhibitor of the second bromodomains of BET proteins

Discovery, structural insight, and bioactivities of BY27 as a selective inhibitor of the second bromodomains of BET proteins

  • Eur J Med Chem. 2019 Nov 15;182:111633. doi: 10.1016/j.ejmech.2019.111633.
Deheng Chen 1,  Tian Lu 2,  Ziqin Yan 3,  Wenchao Lu 1,  Feilong Zhou 3,  Xilin Lyu 3,  Biling Xu 4,  Hualiang Jiang 3,  Kaixian Chen 2,  Cheng Luo 5,  Yujun Zhao 6
Affiliations

Affiliations

  • 1 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China; University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China.
  • 2 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China; Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing, 210023, China.
  • 3 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China.
  • 4 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China; School of Life Science and Medicine, Dalian University of Technology, 2 Dagong Road, Panjin, China.
  • 5 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China; Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing, 210023, China. Electronic address: cluo@simm.ac.cn.
  • 6 State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Rd., Shanghai, 201203, China; University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China. Electronic address: yjzhao@simm.ac.cn.
PMID: 31461688 DOI: 10.1016/j.ejmech.2019.111633
Abstract

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.

Keywords

BD2; BET protein; Bromodomain; Crystal structure; Selective.

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