2. Academic Validation
  3. Design, synthesis and biological evaluation of salicylanilides as novel allosteric inhibitors of human pancreatic lipase

Design, synthesis and biological evaluation of salicylanilides as novel allosteric inhibitors of human pancreatic lipase

  • Bioorg Med Chem. 2023 Aug 15:91:117413. doi: 10.1016/j.bmc.2023.117413.
Yitian Zhao 1,  Min Zhang 2,  Xudong Hou 2,  Jiaxin Han 3,  Xiaoya Qin 2,  Yun Yang 1,  Yunqing Song 2,  Zhikai Liu 1,  Yong Zhang 4,  Zhijian Xu 4,  Qi Jia 2,  Yiming Li 2,  Kaixian Chen 5,  Bo Li 6,  Weiliang Zhu 7,  Guangbo Ge 8
Affiliations

Affiliations

  • 1 Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
  • 2 Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
  • 3 State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
  • 4 State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China.
  • 5 Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China.
  • 6 State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: [email protected].
  • 7 Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; State Key Laboratory of Drug Research; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: [email protected].
  • 8 Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. Electronic address: [email protected].
PMID: 37490786 DOI: 10.1016/j.bmc.2023.117413
Abstract

Obesity is a growing global health problem and is associated with increased prevalence of many metabolic disorders, including diabetes, hypertension and Cardiovascular Disease. Pancreatic Lipase (PL) has been validated as a key target for developing anti-obesity agents, owing to its crucial role in lipid digestion and absorption. In the past few decades, porcine PL (pPL) is always used as the Enzyme source for screening PL inhibitors, which generate numerous pPL inhibitors but the potent inhibitors against human PL (hPL) are rarely reported. Herein, a series of salicylanilide derivatives were designed and synthesized, while their anti-hPL effects were assayed by a fluorescence-based biochemical approach. To investigate the structure-activity relationships of salicylanilide derivatives as hPL inhibitors in detail, structural modifications on three rings (A, B and C) of the salicylanilide skeleton were performed. Among all tested compounds, 2t and 2u were found possessing the most potent anti-PL activity, showing IC50 values of 1.86 μM and 1.63 μM, respectively. Inhibition kinetic analyses suggested that both 2t and 2u could effectively inhibit hPL in a non-competitive manner, with the ki value of 1.67 μM and 1.70 μM, respectively. Fluorescence quenching assays suggested that two inhibitors could quench the fluorescence of hPL via a static quenching procedure. Molecular docking simulations suggested that 2t and 2u could tightly bind on an allosteric site of hPL. Collectively, the structure-activity relationships of salicylanilide derivatives as hPL inhibitors were carefully investigated, while two newly identified reversible hPL inhibitors (2t and 2u) could be used as promising lead compounds to develop novel anti-obesity drugs.

Keywords

Anti-obesity; Salicylanilide; Structure–activity relationship; hPL inhibitor.

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