Docking and Quantitative Structure Activity Relationship studies of Acyl Guanidines as β-Secretase (BACE1) Inhibitor

摘要

β-Secretase (beta-amyloid converting enzyme 1 [BACE1]) is involved in the first and rate-limiting step of β-amyloid (Aβ) peptides production, which leads to the pathogenesis of Alzheimer's disease(AD) Therefore inhibition of BACE1 activity has become an efficient approach for the treatment of AD Ligand-based and docking-based 3D-quantitative structure-activity relationship (3D-QSAR) studies of acyl guanidine analogues were performed with comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) to obtain insights for designing novel potent BACE1 inhibitors. We obtained highly reliable and predictive CoMSIA models with a cross-validated q~2 value of 0.725 and a predictive coefficient r~2_(pred) value of 0.956. CoMSIA contour maps showed the structural requirements for potent activity 3D-QSAR analysis suggested that an acyl guanidine and an amide group in the R6 substituent would be important moieties for potent activity. Moreover, the introduction of small hydrophobic groups in the phenyl ring and hydrogen bond donor groups in 3,5-dichlorophenyl ring could increase biological activity.