Dissection of N,N-diethyl-N′-phenylpiperazines as α7 nicotinic receptor silent agonists
摘要:
The alpha 7 nicotinic acetylcholine receptor (nAChR) is a target for control of inflammation-related phenomena via compounds that are able to selectively induce desensitized states of the receptor. Compounds that selectively desensitize, without facilitating significant channel activation, are termed 'silent agonists' because they can be discriminated from antagonists by the currents evoked with co-application with type II positive allosteric modulators (PAMs). One example is N, N-diethyl-N'-phenyl-piperazine(diEPP) (J. Pharm. Exp. Ther. 2014, 350, 665). We used Ullmann-type aryl amination to synthesize a panel of 27 compounds related to diEPP by substitutions at the aryl ring and in the linkage between the piperazine and phenyl rings. Two-electrode voltage clamping of the human a7 nAChR expressed in Xenopus oocytes revealed that it was possible to tune the behavior of compounds to show enhanced desensitization without corresponding partial agonist activity such that trifluoromethyl and carboxamide aryl substituents showed 33 to 46-fold larger PAM-dependent net-charge responses, indicating selective partitioning of the ligand receptor complexes into the desensitized state. (C) 2015 Elsevier Ltd. All rights reserved.
Dissection of N,N-diethyl-N′-phenylpiperazines as α7 nicotinic receptor silent agonists
摘要:
The alpha 7 nicotinic acetylcholine receptor (nAChR) is a target for control of inflammation-related phenomena via compounds that are able to selectively induce desensitized states of the receptor. Compounds that selectively desensitize, without facilitating significant channel activation, are termed 'silent agonists' because they can be discriminated from antagonists by the currents evoked with co-application with type II positive allosteric modulators (PAMs). One example is N, N-diethyl-N'-phenyl-piperazine(diEPP) (J. Pharm. Exp. Ther. 2014, 350, 665). We used Ullmann-type aryl amination to synthesize a panel of 27 compounds related to diEPP by substitutions at the aryl ring and in the linkage between the piperazine and phenyl rings. Two-electrode voltage clamping of the human a7 nAChR expressed in Xenopus oocytes revealed that it was possible to tune the behavior of compounds to show enhanced desensitization without corresponding partial agonist activity such that trifluoromethyl and carboxamide aryl substituents showed 33 to 46-fold larger PAM-dependent net-charge responses, indicating selective partitioning of the ligand receptor complexes into the desensitized state. (C) 2015 Elsevier Ltd. All rights reserved.
Derivatives of N,N-diethyl-N'- phenyl-piperazine, a silent agonist of the mammalian α7 nicotinic acetylcholine receptor, are provided. These silent agonists control the desensitization state of the receptor. Further provided are pharmaceutical compositions that allow the administration of the silent agonists of the disclosure to a subject animal or human in need of treatment for a pathological condition arising from such as inflammation. The novel silent agonists also may be co-administered to a patient simultaneously or consecutively with a type II positive allosteric modulator to modulate the activity of the receptor.
Structure-Activity Relationship Studies of CNS Agents, XIX: Quantitative Analysis of the Alkyl Chain Effects on the 5-HT1A and 5-HT2 Receptor Affinities of 4-Alkyl-1-arylpiperazines and Their Analogs
作者:Jerzy L. Mokrosz、Maria J. Mokrosz、Sijka Charakchieva-Minol、Maria H. Paluchowska、Andrzej J. Bojarski、Beata Duszyńska
DOI:10.1002/ardp.19953280210
日期:——
The 5‐HT1a and 5‐HT2 receptoraffinity of a set of 44 N‐alkylated 1‐arylpiperazines and their analogs has been analyzed: the n‐hexyl derivatives were the most potent and the most selective 5‐HT1a ligands of all the investigated N‐alkyl homologues. The alkylchain may stablize the 5‐HT1a receptor‐ligand complex by hydrophobic forces. A set of the alkyl substituent contributions (Cht1a) for prediction
TRIAZINE DERIVATIVES AND THEIR THERAPEUTICAL APPLICATIONS
申请人:Tao Chunlin
公开号:US20080176853A1
公开(公告)日:2008-07-24
The invention provides for Triazine derivatives and their use to modulate protein kinase activity in a variety of conditions and diseases.
本发明提供了三嗪衍生物及其在多种疾病和情况下调节蛋白激酶活性的用途。
STYRYL-TRIAZINE DERIVATIVES AND THEIR THERAPEUTICAL APPLICATIONS
申请人:Tao Chunlin
公开号:US20120178758A1
公开(公告)日:2012-07-12
The invention provides Styryl-Triazine derivatives, and further provides methods of using these compounds to modulate protein kinases and to treat protein kinase mediated diseases.
UREIDOPHENYL SUBSTITUTED TRIAZINE DERIVATIVES AND THEIR THERAPEUTICAL APPLICATIONS
申请人:Tao Chunlin
公开号:US20120202818A1
公开(公告)日:2012-08-09
The present invention provides Uredophenyl substituted triazine derivatives and provides methods of using these compounds to modulate protein kinases and methods of using these compounds to treat protein kinase mediated diseases and conditions.