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4-Aminophenyl acetamides and propanamides as potent transient receptor potential vanilloid 1 (TRPV1) ligands
- 4-Aminophenyl acetamides and propanamides as potent transient receptor potential vanilloid 1 (TRPV1) ligands
- Kim, Changhoon; Ann, Jihyae; Lee, Sunho; Kim, Eunhye; Choi, Sun; Blumberg, Peter M.; Frank-Foltyn, Robert; Bahrenberg, Gregor; Stockhause, Hannelore; Christoph, Thomas; Lee, Jeewoo
- Ewha Authors
- SCOPUS Author ID
- Issue Date
- Journal Title
- BIOORGANIC & MEDICINAL CHEMISTRY
- BIOORGANIC & MEDICINAL CHEMISTRY vol. 26, no. 15, pp. 4509 - 4517
- Vanilloid receptor 1; TRPV1 antagonists; Analgesic
- PERGAMON-ELSEVIER SCIENCE LTD
- SCI; SCIE; SCOPUS
- Document Type
- A series of 2-(3,5-substituted 4-aminophenyl)acetamide and propanamide derivatives were investigated as human TRPV1 antagonists. The analysis of the structure-activity relationship indicated that 2-(3,5-dihalo 4-aminophenyl)acetamide analogues displayed excellent antagonism of hTRPV1 activation by capsaicin and showed improved potency compared to the corresponding propanamides. The most potent antagonist (36) exhibited potent and selective antagonism for hTRPV1 not only to capsaicin but also to NADA and elevated temperature; however, it only displayed weak antagonism to low pH. Further studies indicated that oral administration of antagonist 36 blocked the hypothermic effect of capsaicin in vivo but demonstrated hyperthermia at that dose. A docking study of 36 was performed in our established hTRPV1 homology model to understand its binding interactions with the receptor and to compare with that of previous antagonist 1.
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