(Biphenyl-4-yl)methylammonium Chlorides: Potent Anticonvulsants That Modulate Na+ Currents
摘要:
We have reported that compounds containing a biaryl linked unit (Ar-X-Ar') modulated Na+ currents by promoting slow inactivation and fast inactivation processes and by inducing frequency (use)-dependent inhibition of Na+ currents. These electrophysiological properties have been drugs. In this study, we demonstrate that the readily accessible associated with the mode of action of several antiepileptic (biphenyl-4-yl)methylammonium chlorides (compound class B) exhibited a broad range of anticonvulsant activities in animal models, and in the maximal electroshock seizure test the activity of (3'-trifluoromethoxybiphenyl-4-yl)methylammonium chloride (8) exceeded that of phenobarbital and phenytoin upon oral administration to rats. Electrophysiological studies of 8 using mouse catecholamine A-differentiated cells and rat embryonic cortical neurons confirmed that 8 promoted slow and fast inactivation in both cell types but did not affect the frequency (use)-dependent block of Na+ currents.
Substituted <i>N</i>-(Biphenyl-4′-yl)methyl (<i>R</i>)-2-Acetamido-3-methoxypropionamides: Potent Anticonvulsants That Affect Frequency (Use) Dependence and Slow Inactivation of Sodium Channels
作者:Hyosung Lee、Ki Duk Park、Robert Torregrosa、Xiao-Fang Yang、Erik T. Dustrude、Yuying Wang、Sarah M. Wilson、Cindy Barbosa、Yucheng Xiao、Theodore R. Cummins、Rajesh Khanna、Harold Kohn
DOI:10.1021/jm500707r
日期:2014.7.24
We prepared 13 derivatives of N-(biphenyl-4'-yl)methyl (R)-2-acetamido-3-methoxypropionamide that differed in type and placement of a R-substituent in the terminal aryl unit. We demonstrated that the R-substituent impacted the compound's whole animal and cellular pharmacological activities. In rodents, select compounds exhibited excellent anticonvulsant activities and protective indices (PI = TD50/ED50) that compared favorably with clinical antiseizure drugs. Compounds with a polar, aprotic R-substituent potently promoted Na+ channel slow inactivation and displayed frequency (use) inhibition of Na+ currents at low micromolar concentrations. The possible advantage of affecting these two pathways to decrease neurological hyperexcitability is discussed.
(Biphenyl-4-yl)methylammonium Chlorides: Potent Anticonvulsants That Modulate Na<sup>+</sup> Currents
作者:Hyosung Lee、Ki Duk Park、Xiao-Fang Yang、Erik T. Dustrude、Sarah M. Wilson、Rajesh Khanna、Harold Kohn
DOI:10.1021/jm4007092
日期:2013.7.25
We have reported that compounds containing a biaryl linked unit (Ar-X-Ar') modulated Na+ currents by promoting slow inactivation and fast inactivation processes and by inducing frequency (use)-dependent inhibition of Na+ currents. These electrophysiological properties have been drugs. In this study, we demonstrate that the readily accessible associated with the mode of action of several antiepileptic (biphenyl-4-yl)methylammonium chlorides (compound class B) exhibited a broad range of anticonvulsant activities in animal models, and in the maximal electroshock seizure test the activity of (3'-trifluoromethoxybiphenyl-4-yl)methylammonium chloride (8) exceeded that of phenobarbital and phenytoin upon oral administration to rats. Electrophysiological studies of 8 using mouse catecholamine A-differentiated cells and rat embryonic cortical neurons confirmed that 8 promoted slow and fast inactivation in both cell types but did not affect the frequency (use)-dependent block of Na+ currents.