Phenolic Modification as an Approach to Improve the Pharmacology of the 3-Acyloxy-2-benzylpropyl Homovanillic Amides and Thioureas, a Promising Class of Vanilloid Receptor Agonists and Analgesics
摘要:
In order to improve the analgesic activity and pharmacokinetics of thioureas 2 and 3, which we previously developed as potent vanilloid receptor (VR) agonists, we prepared and characterized phenolic modifications of them and of their amide surrogates (7, 8). The aminoethyl analogue of the amide template 13 was a potent analgesic with an EC50 = 0.96 mug/kg in the AA-induced writhing test and with better in vivo stability than the parent phenol. (C) 2002 Elsevier Science Ltd. All rights reserved.
N-(3-acyloxy-2-benzylpropyl)-N′-(4-hydroxy-3-methoxybenzyl)thiourea derivatives as potent vanilloid receptor agonists and analgesics
摘要:
A series of N-(3-acyloxy-2-benzylpropyl)-N'-(4-hydroxy-3-methoxybenzyl)thioura derivatives were investigated as vanilloid receptor ligands in an effort to discover a novel class of analgesics. The proposed pharmacophore model of resiniferatoxin, which includes the C-20-homovanillic moiety, the C-3-carbonyl and the orthoester phenyl ring as key pharmacophoric groups, was utilized as a guide for drug design. The compounds were synthesized after several steps from diethylmalonate and evaluated in vitro in a receptor binding assay and in a capsaicin-activated channel assay. Additional evaluation of analgesic activity, anti-inflammatory activity and pungency was conducted in animal models by the writhing test, the ear edema assay, and the eye-wiping test, respectively. Among the new compounds, 23 and 28 were found to be the most potent receptor agonists of the series with K-i values of 19 nM and 11 nM, respectively. Their strong in vitro potencies were also reflected by an excellent analgesic profile in animal tests with ED50 values of 0.5 mug/kg for 23 and 1.0 mug/kg for 28. Relative to capsaicin these compounds appear to be ca. 600 and 300 times more potent. Both 23 and 28 were found to be less pungent than capsaicin based on the eye-wiping test. However, the compounds did not show significant anti-inflammatory activity. A molecular modeling study comparing the energy-minimized structures of resiniferatoxin and 35 demonstrated a good correlation in the spatial disposition of the corresponding key pharmacophores. The thioureas described in this investigation, which were designed as simplified resiniferatoxin surrogates, represent a novel class of potent vanilloid receptor agonists endowed with potent analgesic activity and reduced pungency. (C) 2000 Elsevier Science Ltd. All rights reserved.
<i>N</i>-(3-Acyloxy-2-benzylpropyl)-<i>N</i>‘-[4-(methylsulfonylamino)benzyl]thiourea Analogues: Novel Potent and High Affinity Antagonists and Partial Antagonists of the Vanilloid Receptor
作者:Jeewoo Lee、Jiyoun Lee、Myungshim Kang、Myoungyoup Shin、Ji-Min Kim、Sang-Uk Kang、Ju-Ok Lim、Hyun-Kyung Choi、Young-Ger Suh、Hyeung-Geun Park、Uhtaek Oh、Hee-Doo Kim、Young-Ho Park、Hee-Jin Ha、Young-Ho Kim、Attila Toth、Yun Wang、Richard Tran、Larry V. Pearce、Daniel J. Lundberg、Peter M. Blumberg
DOI:10.1021/jm030089u
日期:2003.7.1
Isosteric replacement of the phenolic hydroxyl group in potent vanilloid receptor (VR1) agonists with the alkylsulfonamidogroup provides a series of compounds which are effective antagonists to the action of the capsaicin on rat VR1 heterologously expressed in Chinese hamster ovary (CHO) cells. In particular, compound 61, N-[2-(3,4-dimethylbenzyl)-3-pivaloyloxypropyl]-N'-[3-fluoro-4-(methylsulfonylamin
N-(3-Acyloxy-2-Benzylpropyl)-N′-Dihydroxytetrahydrobenzazepine and Tetrahydroisoquinoline Thiourea Analogues as Vanilloid Receptor Ligands
作者:Jeewoo Lee、Jiyoun Lee、Tamas Szabo、Adamar F Gonzalez、Jacqueline D Welter、Peter M Blumberg
DOI:10.1016/s0968-0896(01)00068-2
日期:2001.7
The vanilloid receptor represents a promising target for drug development. Building on our previous strategies which have generated potent agonists for VR1, we now describe a series of novel N-(3-acyloxy-2-benzylpropyl)-N'-dihydroxytetrahydro-benzazepine and tetrahydroisoquinoline thiourea analogues, several of which are potent VRI antagonists. We report here the rationale for the design, the synthesis, and the in vitro characterization of activity in assays for [H-3]resiniferatoxin binding and Ca-45 influx using heterologously expressed rat VRI. (C) 2001 Elsevier Science Ltd. All rights reserved.
VANILLOID ANALOGUES CONTAINING RESINIFERATOXIN PHARMACOPHORES AS POTENT VANILLOID RECEPTOR AGONISTS AND ANALGESICS, COMPOSITIONS AND USES THEREOF
申请人:PACIFIC CORPORATION
公开号:EP1154989B1
公开(公告)日:2005-12-14
US6476076B1
申请人:——
公开号:US6476076B1
公开(公告)日:2002-11-05
[EN] VANILLOID ANALOGUES CONTAINING RESINIFERATOXIN PHARMACOPHORES AS POTENT VANILLOID RECEPTOR AGONISTS AND ANALGESICS, COMPOSITIONS AND USES THEREOF<br/>[FR] ANALOGUES DE VANILLOIDE CONTENANT DES PHARMACOPHORES DE RESINIFERATOXINE, UTILISES EN TANT QU'AGONISTES DU RECEPTEUR DE VANILLOIDE ET ANALGESIQUES PUISSANTS, COMPOSITIONS ET LEURS UTILISATIONS
申请人:PACIFIC CORP
公开号:WO2000050387A1
公开(公告)日:2000-08-31
The present invention is related to new vanilloid analogues containing resiniferatoxin pharmacophores, pharmaceutical compositions comprising such analogues, and their uses as vanilloid receptor agonists and potent analgesics. The present invention provides a pharmaceutical composition for treating acute, chronic, inflammatory or neuropathic pains or for treating bladder hypersensitivity.