Discovery of Cyclic Sulfone Hydroxyethylamines as Potent and Selective β-Site APP-Cleaving Enzyme 1 (BACE1) Inhibitors: Structure Based Design and In Vivo Reduction of Amyloid β-Peptides
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Rueeger, Heinrich, Lueoend, Rainer Martin, Rogel, Olivier, Rondeau, Jean-Michel, Moebitz, Henrik, Machauer, Rainer, Jacobson, Laura, Staufenbiel, Matthias, Desrayaud, Sandrine and Neumann, Ulf (2012) Discovery of Cyclic Sulfone Hydroxyethylamines as Potent and Selective β-Site APP-Cleaving Enzyme 1 (BACE1) Inhibitors: Structure Based Design and In Vivo Reduction of Amyloid β-Peptides. Journal of Medicinal Chemistry, 55 (7). pp. 3364-3386. ISSN 0022-2623
Abstract
Structure-based design of a series of cyclic hydroxyethylamine BACE1 inhibitors allowed the rational incorporation of prime- and nonprime-side fragments to a central core template without any amide functionality. The core scaffold selection and the SAR development was supported by molecular modeling studies and by X-ray analysis of BACE1 complexes with various ligands to expedite the optimization of the series. The direct extension from P1-aryl- and heteroaryl moieties into the S3 binding pocket allowed to enhance potency and selectivity over cathepsin D. Restraining the design and synthesis of compounds to a physicochemical property space consistent with CNS drugs led to inhibitors with improved blood-brain barrier permeability. Guided by structure based optimization we were able to obtain highly potent compounds such as 60p with enzymatic and cellular IC50 of 2 and 50 nM, respectively and with >200-fold selectivity over cathepsin D. Pharmacodynamic studies in APP51/16 transgenic mice at oral doses of 180 µmol/kg demonstrated significant reduction of brain Aβ levels.
| Item Type: | Article |
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| Keywords: | BACE1, beta-site APP-cleaving enzyme, β-Secretase, Hydroxyethylamine BACE1 inhibitors, Structure based design, Alzheimer’s disease, blood-brain barrier permeability |
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| Date Deposited: | 13 Oct 2015 13:14 |
| Last Modified: | 13 Oct 2015 13:14 |
| URI: | https://oak.novartis.com/id/eprint/6447 |