Substituted thiazolamide coupled to a redox delivery system: a new γ-secretase inhibitor with enhanced pharmacokinetic profile
作者:Younes Laras、Gilles Quéléver、Cédrik Garino、Nicolas Pietrancosta、Mahmoud Sheha、Frédéric Bihel、Michael S. Wolfe、Jean-Louis Kraus
DOI:10.1039/b415090b
日期:——
Inhibition of γ-secretase, one of the enzymes responsible for the cleavage of the amyloid precursor protein (APP) to produce pathogenic Aβ peptides, is an attractive approach for the treatment of Alzheimer's disease. We have designed a new γ-secretase thiazolamide inhibitor bearing a dihydronicotinoyl moiety as Redox Delivery System which allows specific delivery of the drug to the brain. Through, on the one hand, Aβ peptide production measurements by specific in vitro assays (γ-secretase Cell Free assay and Cell Based assay on HEK 293 APP transfected cells) and, on the other hand, pharmacokinetic studies on animal models, the new inhibitor shows a good pharmacokinetic profile as well as a potent γ-secretase inhibitory activity in vitro. From the obtained results, it is expected that drug 2 will be mainly delivered to the CNS with low diffusion in the peripheral tissues. Consequently the side effects of this γ-secretase inhibitor on the immune cells could be reduced.
γ-分泌酶抑制剂是一种有吸引力的阿尔茨海默病治疗方法,γ-分泌酶是负责将淀粉样前体蛋白(APP)切割成致病性Aβ肽的酶之一。我们设计了一种新的γ-分泌酶噻唑酰胺抑制剂,其具有二氢烟酰基部分作为氧化还原传递系统,允许特定地将药物传递到大脑。通过一方面使用特定的体外测定(γ-分泌酶无细胞测定和基于HEK 293 APP转染细胞的细胞测定)测量Aβ肽产生,另一方面使用动物模型进行药代动力学研究,新抑制剂表现出良好的药代动力学特征以及强大的体外γ-分泌酶抑制活性。从获得的结果来看,预计药物2将主要传递到中枢神经系统,而在周围组织中的扩散较低。因此,这种γ-分泌酶抑制剂对免疫细胞的副作用可能会减少。