“Methylene Bridge” to 5-HT3 Receptor Antagonists: Conformationally Constrained Phenylguanidines
摘要:
Arylguanidines, depending upon their aromatic substitution pattern, display varying actions at 5-HT3 receptors (e.g., partial agonist, agonist, superagonist). Here, we demonstrate that conformational constraint of these agents as dihydroquinazolines (such as A6CDQ; 1) results in their conversion to 5-HT3 receptor antagonists. We examined the structure activity relationships of 1. Replacement/removal of any of the guanidinium nitrogen atoms of 1 resulted in decreased affinity. All three nitrogen atoms of 1 are necessary for optimal binding affinity at 5-HT3 receptors. Introduction of substituents as small as an N2-methyl group abolishes affinity. The results are consistent with homology modeling/docking studies and binding data from site-directed mutagenesis studies. Introducing a "methylene bridge" to the arylguanidine structure, regardless of its functional activity, results in a 5-HT3 receptor antagonist.
“Methylene Bridge” to 5-HT3 Receptor Antagonists: Conformationally Constrained Phenylguanidines
摘要:
Arylguanidines, depending upon their aromatic substitution pattern, display varying actions at 5-HT3 receptors (e.g., partial agonist, agonist, superagonist). Here, we demonstrate that conformational constraint of these agents as dihydroquinazolines (such as A6CDQ; 1) results in their conversion to 5-HT3 receptor antagonists. We examined the structure activity relationships of 1. Replacement/removal of any of the guanidinium nitrogen atoms of 1 resulted in decreased affinity. All three nitrogen atoms of 1 are necessary for optimal binding affinity at 5-HT3 receptors. Introduction of substituents as small as an N2-methyl group abolishes affinity. The results are consistent with homology modeling/docking studies and binding data from site-directed mutagenesis studies. Introducing a "methylene bridge" to the arylguanidine structure, regardless of its functional activity, results in a 5-HT3 receptor antagonist.
Compounds of formula IA and IB are new
1
where the variables R
1
through R
10
have the values set forth herein. Such compounds have use in treating diseases such as obesity and type II diabetes, and may be provided as pharmaceutical formulations in conjunction with a pharmaceutically acceptable carrier.
AMINOTETRALIN-DERIVED UREA MODULATORS OF VANILLOID VR1 RECEPTOR
申请人:Codd Ellen
公开号:US20080097102A1
公开(公告)日:2008-04-24
This invention is directed to vanilloid receptor VR1 ligands. More particularly, this invention relates to β-aminotetralin-derived ureas that are potent antagonists or agonists of VR1 which are useful for the treatment and prevention of inflammatory and other pain conditions in mammals.
Methods and compositions for treating inflammatory or autoimmune diseases or conditions using serotonin receptor activators
申请人:Flagship Pioneering Innovations V, Inc.
公开号:US11208475B1
公开(公告)日:2021-12-28
The present invention provides methods for treating inflammatory or autoimmune diseases or conditions using serotonin receptor activators, such as serotonin receptor activating antibodies, among others. The invention also features compositions containing serotonin receptor activators, methods of diagnosing patients with a serotonin receptor-associated inflammatory or autoimmune disease or condition, and methods of predicting the response of an inflammatory or autoimmune disease or condition in a subject to treatment with serotonin receptor activators.
Tetrahydro-2-naphthyl and 2-Indanyl Triazolopyrimidines Targeting <i>Plasmodium falciparum</i> Dihydroorotate Dehydrogenase Display Potent and Selective Antimalarial Activity
作者:Sreekanth Kokkonda、Xiaoyi Deng、Karen L. White、Jose M. Coteron、Maria Marco、Laura de las Heras、John White、Farah El Mazouni、Diana R. Tomchick、Krishne Manjalanagara、Kakali Rani Rudra、Gong Chen、Julia Morizzi、Eileen Ryan、Werner Kaminsky、Didier Leroy、María Santos Martínez-Martínez、Maria Belen Jimenez-Diaz、Santiago Ferrer Bazaga、Iñigo Angulo-Barturen、David Waterson、Jeremy N. Burrows、Dave Matthews、Susan A. Charman、Margaret A. Phillips、Pradipsinh K. Rathod
DOI:10.1021/acs.jmedchem.6b00275
日期:2016.6.9
Malaria persists as one of the most devastating global infectious diseases. The pyrimidine biosynthetic enzyme dihydroorotate dehydrogenase (DHODH) has been identified as a new malaria drug target, and a triazolopyrimidine-based DHODH inhibitor I (DSM265) is in clinical development. We sought to identify compounds with higher potency against Plasmodium DHODH while showing greater selectivity toward animal DHODHs. Herein we describe a series of novel triazolopyrimidines wherein the p-SF5-aniline was replaced with substituted 1,2,3,4-tetrahydro-2-naphthyl or 2-indanyl amines. These compounds showed strong species selectivity, and several highly potent tetrahydro-2-naphthyl derivatives were identified. Compounds with halogen substitutions displayed sustained plasma levels after oral dosing in rodents leading to efficacy in the P. falciparum SCID mouse malaria model. These data suggest that tetrahydro-2-naphthyl derivatives have the potential to be efficacious for the treatment of malaria, but due to higher metabolic clearance than 1, they most likely would need to be part of a multidose regimen.