Discovery of novel benzimidazole derivatives as potent p300 bromodomain inhibitors with anti-proliferative activity in multiple cancer cells

  • Bioorg Med Chem. 2022 Jul 15;66:116784. doi: 10.1016/j.bmc.2022.116784.
Zonglong Chen  1 ,  Jiayi Li  2 ,  Hong Yang  3 ,  Yulong He  1 ,  Qiongyu Shi  3 ,  Qi Chang  1 ,  Ruiqi Liu  1 ,  Xun Huang  4 ,  Yingxia Li  5
Affiliations
  • 1. Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China.
  • 2. School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, China.
  • 3. Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China.
  • 4. Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; University of Chinese Academy of Sciences, NO.19A Yuquan Road, Beijing 100049, China.
  • 5. Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China. Electronic address: [email protected].
PMID: 35569250 DOI: 10.1016/j.bmc.2022.116784
Abstract

Adenovirus E1A-associated 300-kD protein (p300) bromodomain, which regulates gene expression by recognizing acetylated lysine (KAc) of histone, is a promising target for the treatment of Cancer. Herein, a series of potent p300 bromodomain inhibitors with novel CBP30-based scaffolds was discovered through bioisosterism and conformational restriction strategies. The most promising compound 1u showed more potent inhibitory activity (IC50 = 49 nM) against p300 bromodomain and anti-proliferative activity in various Cancer cell lines compared to CBP30. Moreover, 1u suppressed the expression of c-Myc and induced G1/G0 phase arrest and Apoptosis in OPM-2 cells more potently than CBP30. This study provides new lead compounds for further research on the biological functions of p300.

Keywords
Bromodomain inhibitors; CBP30; P300; SBDD.
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