6-Benzothiazolyl Ureas, Thioureas and Guanidines are Potent Inhibitors of ABAD/17β-HSD10 and Potential Drugs for Alzheimer"s Disease Treatment: Design, Synthesis and in vitro Evaluation
作者:Ondrej Benek、Lukas Hroch、Laura Aitken、Rafael Dolezal、Patrick Guest、Marketa Benkova、Ondrej Soukup、Karel Musil、Kamil Kuca、Terry K. Smith、Frank Gunn-Moore、Kamil Musilek
DOI:10.2174/1573406413666170109142725
日期:2017.5.5
Background: The mitochondrial enzyme amyloid beta-binding alcohol dehydrogenase
(ABAD) also known as 17β-hydroxysteroid dehydrogenase type 10 (17β-HSD10) has been connected
with the pathogenesis of Alzheimer’s disease (AD). ABAD/17β-HSD10 is a binding site for
the amyloid-beta peptide (Aβ) inside the mitochondrial matrix where it exacerbates Aβtoxicity. Interaction
between these two proteins triggers a series of events leading to mitochondrial dysfunction
as seen in AD.
Methods: As ABAD’s enzymatic activity is required for mediating Aβ toxicity, its inhibition presents
a promising strategy for AD treatment. In this study, a series of new benzothiazolylurea analogues
have been prepared and evaluated in vitro for their potency to inhibit ABAD/17β-HSD10 enzymatic
activity. The most potent compounds have also been tested for their cytotoxic properties and
their ability to permeate through blood-brain barrier has been predicted. To explain the structureactivity
relationship QSAR and pharmacophore studies have been performed.
Results and Conclusion: Compound 12 was identified being the most promising hit compound with
good inhibitory activity (IC50 = 3.06 ± 0.40 µ M) and acceptable cytotoxicity profile comparable to
the parent compound of frentizole. The satisfactory physical-chemical properties suggesting its capability
to permeate through BBB make compound 12 a novel lead structure for further development
and biological assessment.
背景:线粒体酶淀粉样β结合醇脱氢酶(ABAD),也称为17β-羟基甾体脱氢酶类型10(17β-HSD10),已被联系到阿尔茨海默病(AD)的发病机制中。ABAD/17β-HSD10是淀粉样β肽(Aβ)在线粒体基质内的结合位点,它会加剧Aβ的毒性。这两种蛋白质之间的相互作用触发了一系列事件,导致线粒体功能障碍,如在AD中所见。
方法:由于ABAD的酶活性是介导Aβ毒性所必需的,因此抑制ABAD提供了一种有希望的AD治疗方法。在本研究中,我们准备并评估了一系列新的苯并噻唑脲类似物,以确定它们抑制ABAD/17β-HSD10酶活性的效力。最有效的化合物也测试了其细胞毒性特性,并预测了它们穿透血脑屏障的能力。为了解释结构-活性关系,进行了定量构效关系(QSAR)和药效团研究。
结果与结论:化合物12被确定为最有希望的命中化合物,具有良好的抑制活性(IC50 = 3.06 ± 0.40 µM)和可接受的细胞毒性特征,与frentizole的母体化合物相当。令人满意的理化特性表明其能够穿透血脑屏障,使化合物12成为一种新颖的先导结构,适合进一步开发和生物评估。