Development of Cholinesterase Inhibitors using 1-Benzyl Piperidin-4-yl (α)-Lipoic Amide Molecules
作者:Seung-Hwan Lee、Beom-Cheol Kim、Jae-Kwan Kim、Hye Sook Lee、Min Young Shon、Jeong Ho Park
DOI:10.5012/bkcs.2014.35.6.1681
日期:2014.6.20
A series of hybrid molecules between ($\alpha}$)-lipoic acid (ALA) and 4-amino-1-benzyl piperidines were synthesized and their in vitro cholinesterase (acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE)) inhibitory activities were evaluated. Even though the parent compounds did not exhibit any inhibitory activity against cholinesterase (ChE) with the exception of compound 14 ($IC_50}=255.26\pm}4.41$ against BuChE), all hybrid molecules demonstrated BuChE inhibitory activity. Some hybrid compounds also displayed AChE inhibitory activity. Specifically, compound 17 was shown to be an effective inhibitor against both AChE ($IC_50}=1.75\pm}0.30\mu}M$) and BuChE ($IC_50}=5.61\pm}1.25\mu}M$) comparable to galantamine ($IC_50}=1.7\pm}0.9\mu}M$ against AChE and $IC_50}=9.4\pm}2.5\mu}M$ against BuChE). Inhibition kinetic studies using compound 17 indicated a mixed inhibition type for AChE and a noncompetitive inhibition type for BuChE. Its binding affinity ($K_i$) values to AChE and BuChE were $3.8\pm}0.005\mu}M$ and $7.0\pm}0.04\mu}M$, respectively.
合成了一系列混合分子,这些分子由(α)-硫辛酸(ALA)和4-氨基-1-苄基哌啶构成,并评估了它们的体外胆碱酯酶(乙酰胆碱酯酶(AChE)和丁酰胆碱酯酶(BuChE))抑制活性。尽管母体化合物除了化合物14(对BuChE的$IC_50}=255.26\pm}4.41$)之外并未表现出任何对胆碱酯酶(ChE)的抑制活性,但所有混合分子均显示出对BuChE的抑制活性。一些混合化合物也表现出对AChE的抑制活性。具体而言,化合物17被证明对AChE($IC_50}=1.75\pm}0.30\mu}M$)和BuChE($IC_50}=5.61\pm}1.25\mu}M$)均为有效抑制剂,其活性与加兰他敏(对AChE的$IC_50}=1.7\pm}0.9\mu}M$和对BuChE的$IC_50}=9.4\pm}2.5\mu}M$)相当。使用化合物17进行的抑制动力学研究表明,AChE为混合抑制类型,而BuChE为非竞争性抑制类型。它对AChE和BuChE的结合亲和力($K_i$)值分别为$3.8\pm}0.005\mu}M$和$7.0\pm}0.04\mu}M$。