From BACE1 Inhibitor to Multifunctionality of Tryptoline and Tryptamine Triazole Derivatives for Alzheimer’s Disease
作者:Jutamas Jiaranaikulwanitch、Piyarat Govitrapong、Valery V. Fokin、Opa Vajragupta
DOI:10.3390/molecules17078312
日期:——
Efforts to discover new drugs for Alzheimer’s disease emphasizing multiple targets was conducted seeking to inhibit amyloid oligomer formation and to prevent radical formation. The tryptoline and tryptamine cores of BACE1 inhibitors previously identified by virtual screening were modified in silico for additional modes of action. These core structures were readily linked to different side chains using 1,2,3-triazole rings as bridges by copper catalyzed azide-alkyne cycloaddition reactions. Three compounds among the sixteen designed compounds exerted multifunctional activities including β-secretase inhibitory action, anti-amyloid aggregation, metal chelating and antioxidant effects at micromolar levels. the neuroprotective effects of the multifunctional compounds 6h, 12c and 12h on Aβ1-42 induced neuronal cell death at 1 μM were significantly greater than those of the potent single target compound, BACE1 inhibitor IV and were comparable to curcumin. The observed synergistic effect resulting from the reduction of the Aβ1-42 neurotoxicity cascade substantiates the validity of our multifunctional strategy in drug discovery for Alzheimer’s disease.
针对寻找阿尔茨海默病新药物的多靶点策略,研究人员通过抑制淀粉样蛋白寡聚体的形成以及阻止自由基的生成来进行努力。虚拟筛选发现的BACE1抑制剂中的色氨酸和色胺核心结构,在计算机辅助下进行了多种作用方式的修饰。利用铜催化的叠氮-炔环加成反应,这些核心结构很容易通过1,2,3-三唑环与不同的侧链相连。在设计的16种化合物中,有3种展现了多重功能活性,包括β-分泌酶抑制作用、抗淀粉样蛋白聚集、金属螯合以及抗氧化效应,活性水平在微摩尔级别。多重功能化合物6h、12c和12h在1μM浓度下,对Aβ1-42诱导的神经细胞死亡的保护作用明显强于强效单一目标化合物BACE1抑制剂IV,与姜黄素相当。观察到的协同效应,源于Aβ1-42神经毒性级联反应的减少,这证实了我们在阿尔茨海默病药物发现中采用多重功能策略的有效性。