New (arylalkyl)azole derivatives showing anticonvulsant effects could have VGSC and/or GABA A R affinity according to molecular modeling studies
作者:Suat Sari、Arzu Karakurt、Harun Uslu、F. Betül Kaynak、Ünsal Çalış、Sevim Dalkara
DOI:10.1016/j.ejmech.2016.08.032
日期:2016.11
(Arylalkyl)azoles (AAAs) emerged as a novel class of antiepileptic agents with the invention of nafimidone and denzimol. Several AAA derivatives with potent anticonvulsant activities have been reported so far, however neurotoxicity was usually an issue. We prepared a set of ester derivatives of 1-(2-naphthyl)2-(1H-1,2,4-triazol-1-yeethanone oxime and evaluated their anticonvulsant and neurotoxic effects in mice. Most of our compounds were protective against maximal electroshock (MES)- and/or subcutaneous metrazol (s.c. MET)-induced seizures whereas none of them showed neurotoxicity. Nafimidone and denzimol have an activity profile similar to that of phenytoin or carbamazepine, both of which are known to inhibit voltage-gated sodium channels (VGSCs) as well as to enhance gamma-aminobutiric acid (GABA)-mediated response. In order to get insights into the effects of our compounds on VGSCs and A type GABA receptors (GABA(A)Rs) we performed docking studies using homology model of Na+ channel inner pore and GABA(A)R as docking scaffolds. We found that our compounds bind VGSCs in similar ways as phenytoin, carbamazepine, and lamotrigine. They showed strong affinity to benzodiazepine (BZD) binding site and their binding interactions were mainly complied with the experimental data and the reported BZD binding model. (C) 2016 Elsevier Masson SAS. All rights reserved.
(芳香烷基)咪唑类化合物(AAAs)随着那夫咪多和丁卡莫尔的发明而成为一类新型的抗癫痫药物。到目前为止,已经报道了多种具有强烈抗惊厥活性的AAA衍生物,然而神经毒性通常是这些问题药物的一个问题。我们制备了一系列1-(2-萘基)-2-(1H-1,2,4-三氮唑-1-基)乙酰氧基的酯类衍生物,并在小鼠中评估了它们的抗惊厥和神经毒性作用。我们的大多数化合物对电击(MES)和/或皮下甲基丙二尼酸酯(s.c. MET)引起的癫痫发作具有保护作用,但未发现神经毒性。那夫咪多和丁卡莫尔的活性与苯妥英或卡马西平的活性相似,这两种药物均已被证明可以抑制电压门控钠通道(VGSCs),并增强γ-氨基丁酸(GABA)介导的反应。为了了解我们的化合物对VGSCs和GABA A型受体(GABA(A)Rs)的作用,我们使用钠通道内孔和GABA(A)受体的同源模型作为对接支架进行了对接研究。我们发现我们的化合物与苯妥英、卡马西平和拉莫三嗪类似地与VGSCs结合。它们对苯二氮卓类(BZD)结合位点具有较强的亲和力,其结合相互作用主要与实验数据和报道的BZD结合模型相符。
(C) 2016 Elsevier Masson SAS。保留所有权利。