2. Academic Validation
  3. Synthesis and biological evaluation of novel benzo[c][1,2,5]thiadiazol-5-yl and thieno[3,2-c]- pyridin-2-yl imidazole derivatives as ALK5 inhibitors

Synthesis and biological evaluation of novel benzo[c][1,2,5]thiadiazol-5-yl and thieno[3,2-c]- pyridin-2-yl imidazole derivatives as ALK5 inhibitors

  • Bioorg Med Chem Lett. 2019 Aug 15;29(16):2070-2075. doi: 10.1016/j.bmcl.2019.07.015.
Zhen Guo 1,  Xiaowei Song 2,  Li-Min Zhao 1,  Ming Guan Piao 1,  Jishan Quan 3,  Hu-Ri Piao 1,  Cheng Hua Jin 4
Affiliations

Affiliations

  • 1 College of Pharmacy, Yanbian University, Yanji 133002, PR China.
  • 2 Department of Radiology, Yanbian University Hospital, Yanji 133002, PR China.
  • 3 College of Pharmacy, Yanbian University, Yanji 133002, PR China; Department of Pharmaceutics, College of Pharmacy, Yanbian University, Yanji 133002, PR China. Electronic address: quanjishan@ybu.edu.cn.
  • 4 College of Pharmacy, Yanbian University, Yanji 133002, PR China; Key Laboratory of Natural Resources of Changbai Mountain and Functional Molecules, Ministry of Education, Molecular Medicine Research Center, Yanbian University, Yanji 133002, PR China. Electronic address: jinchenghua@ybu.edu.cn.
PMID: 31303386 DOI: 10.1016/j.bmcl.2019.07.015
Abstract

Transforming growth factor (TGF-β), a key mediator of tumor growth and metastasis, has been recognized as an important Cancer drug target. A series of benzo[c][1,2,5]thiadiazol-5-yl imidazoles (14a-g) and thieno[3,2-c]-pyridin-2-yl imidazoles (20a-g) were designed, synthesized, and evaluated for their activin receptor-like kinase 5 (ALK5) activities. Among these compounds, 14c showed the highest activity (IC50 = 0.008 μM) against ALK5 kinase, which was 16.1-fold and 1.8-fold higher than those of positive control compounds LY-2157299 (IC50 = 0.129 μM) and EW-7197 (IC50 = 0.014 μM), respectively. Compound 14g (350) showed the highest selectivity index of ALK5 against p38α MAP kinase, which was significantly higher than that of positive control compounds LY-2157299 (4) and EW-7197 (211). The inhibitory effects of compound 14c on TGF-β-induced Smad signaling and cell motility were studied in SPC-A1, HepG2 and HUVEC cells using western blot analysis and wound healing assay. ADMET prediction analysis showed that compounds 14c and 14g had good pharmacokinetics and drug-likeness behaviors.

Keywords

ADMET; ALK5; Imidazole; Inhibitors; TGF-β.

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