2. Academic Validation
  3. Discovery of (S)-N-(3-isopropylphenyl)-2-(5-phenylthiazol-2-yl)pyrrolidine-1-carboxamide as potent and brain-penetrant TRPV1 antagonist

Discovery of (S)-N-(3-isopropylphenyl)-2-(5-phenylthiazol-2-yl)pyrrolidine-1-carboxamide as potent and brain-penetrant TRPV1 antagonist

  • Eur J Med Chem. 2022 Apr 5;233:114191. doi: 10.1016/j.ejmech.2022.114191.
Yue Qiao 1,  Yang Zhang 2,  Zhenrui Qiao 1,  Wenya He 3,  Yingda Chen 1,  Depu Song 1,  Guohao Wang 1,  Ning Guo 1,  Lulian Shao 1,  Zhiyong Tian 1,  Qiang Wang 4,  Lin Yan 5,  Hai Qian 6
Affiliations

Affiliations

  • 1 School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China.
  • 2 State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, Jiangsu, 210009, China; Faculty of Biological Science and Technology, Changzhi University, 73 East Chengbei Street, Changzhi, Shanxi, 046011, China.
  • 3 Henan-Macquarie University Joint Centre for Biomedical Innovation, School of Life Sciences, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China.
  • 4 School of Pharmaceutical Sciences, South-Central University For Nationalities, 182 Minyuan road, Wuhan, Hubei, 430074, China.
  • 5 School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China. Electronic address: [email protected].
  • 6 State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, Jiangsu, 210009, China. Electronic address: [email protected].
PMID: 35263708 DOI: 10.1016/j.ejmech.2022.114191
Abstract

Transient receptor potential vanilloid 1 (TRPV1) antagonists can inhibit the transmission of nociceptive signals from the peripheral to the central nervous system (CNS), providing a new strategy for pain relief. In this work, in order to develop potent, CNS-penetrant, and orally available TRPV1 antagonists, three series of novel molecules based on the key pharmacophore structures of classic TRPV1 ligands SB-705498 and MDR-652 were designed and synthesized. Through systematic in vitro and in vivo bioassays, (S)-N-(3-isopropylphenyl)-2-(5-phenylthiazol-2-yl)pyrrolidine-1-carboxamide (7q) was finally identified, which had enhanced TRPV1 antagonistic activity (IC50 (capsaicin) = 2.66 nM), excellent CNS penetration (brain/plasma ratio = 1.66), favorable mode-selectivity, good bioavailability, and no side effects of hyperthermia. Molecular docking and dynamics studies indicated that the high binding affinity of compound 7q to TRPV1 was related to multiple interactions, which resulted in significant conformational changes of TRPV1. Overall, our findings have led to a potent, mode-selective, and CNS-penetrant TRPV1 antagonist as a valuable lead for development of novel TRPV1 antagonists.

Keywords

Analgesic; Brain-penetrant; Phenylthiazolyl; Side effect; Transient receptor potential vanilloid type 1.

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