Development of a New Distyrylbenzene-Derivative Amyloid-β-aggregation and Fibril Formation Inhibitor
作者:Hideharu Suzuki、Akihito Ishigami、Ayako Orimoto、Akihiro Matsuyama、Setsuko Handa、Naoki Maruyama、Yuusaku Yokoyama、Hiroaki Okuno、Masamichi Nakakoshi
DOI:10.1248/cpb.c12-00365
日期:——
Several new amyloid-β (Aβ) aggregation inhibitors were synthesized according to our theory that a hydrophilic moiety could be attached to the Aβ-recognition unit for the purpose of preventing amyloid plaque formation. A distyrylbenzene-derivative, DSB(EEX)3, which consider the Aβ recognition unit (DSB, 1,4-distyrylbenzene) and expected to bind to amyloid fibrils (β-sheet structure), was combined with the hydrophilic aggregation disrupting element (EEX) (E, Glu; X, 2-(2-(2-aminoethoxy)ethoxy)acetic acid). This DSB(EEX)3 compound, compared to several others synthesized similarly, was found to be the most active for reducing Aβ toxicity toward IMR-32 human neuroblastoma cells. Moreover, its inhibition of Aβ-aggregation or fibril formation was directly confirmed by transmission electron microscopy and atomic force microscopy. These results suggest that the Aβ aggregation inhibitor DSB(EEX)3 disrupts clumps of Aβ protein and is a likely candidate for drug development to treat Alzheimer’s disease.
根据我们的理论,亲水性分子可以连接到 Aβ-识别单元上,从而达到阻止淀粉样斑块形成的目的,我们合成了几种新的淀粉样-β(Aβ)聚集抑制剂。考虑到 Aβ 识别单元(DSB,1,4-二苯乙烯苯)并有望与淀粉样纤维(β-片状结构)结合的二苯乙烯苯衍生物 DSB(EEX)3,与亲水性聚集干扰元素(EEX)(E,Glu;X,2-(2-(2-氨基乙氧基)乙氧基)乙酸)相结合。与其他几种类似的合成物相比,发现这种 DSB(EEX)3 化合物在降低 Aβ 对 IMR-32 人类神经母细胞瘤细胞的毒性方面最具活性。此外,透射电子显微镜和原子力显微镜也直接证实了它对 Aβ 聚集或纤维形成的抑制作用。这些结果表明,Aβ聚集抑制剂DSB(EEX)3能破坏Aβ蛋白的团块,有可能成为治疗阿尔茨海默病的候选药物。