Oxidation Potentials of N-Modified Derivatives of the Analgesic Flupirtine Linked to Potassium K<sub>V</sub>7 Channel Opening Activity But Not Hepatocyte Toxicity
作者:Christian J. Lemmerhirt、Mirko Rombach、Anja Bodtke、Patrick J. Bednarski、Andreas Link
DOI:10.1002/cmdc.201402442
日期:2015.2
flupirtine and its analogues were measured by cyclic voltammetry. KV7.2/3 (KCNQ2/3) opening activity was determined by an established assay with HEK293 cells overexpressing these channels. A link was found between the oxidation potentials of the compounds and their EC50 values for potassium channel opening activity. On the other hand, no correlation was observed between oxidation potentials and cytotoxicity
神经元电压门控性钾离子通道(K V)的开放剂作为治疗疼痛(氟吡汀)和癫痫病(瑞替加滨)的治疗剂受到关注。为了更好地了解氟吡汀的作用机理和毒性,我们合成了九种具有不同氧化还原行为的新型类似物。氟吡汀可被氧化代谢为氮杂醌二亚胺;因此,通过循环伏安法测定了氟吡汀及其类似物的氧化电位。K V 7.2 / 3(KCNQ2 / 3)打开活性是通过已建立的测定法来确定的,这些测定法过度表达了这些通道的HEK293细胞。发现化合物的氧化电位与其EC 50之间存在联系钾通道开放活性的数值。另一方面,在转基因小鼠肝细胞(TAMH)的培养物中,氧化电位与细胞毒性之间没有相关性。这些结果支持了氟吡汀的氧化代谢产物有助于作用机理的想法,类似于最近对乙酰氨基酚(对乙酰氨基酚)的提议,但对肝毒性没有影响。