Abstract:
:The identification of centrally efficacious β-secretase (BACE1) inhibitors for the treatment of Alzheimer's disease (AD) has historically been thwarted by an inability to maintain alignment of potency, brain availability, and desired absorption, distribution, metabolism, and excretion (ADME) properties. In this paper, we describe a series of truncated, fused thioamidines that are efficiently selective in garnering BACE1 activity without simultaneously inhibiting the closely related cathepsin D or negatively impacting brain penetration and ADME alignment, as exemplified by 36. Upon oral administration, these inhibitors exhibit robust brain availability and are efficacious in lowering central Amyloid β (Aβ) levels in mouse and dog. In addition, chronic treatment in aged PS1/APP mice effects a decrease in the number and size of Aβ-derived plaques. Most importantly, evaluation of 36 in a 2-week exploratory toxicology study revealed no accumulation of autofluorescent material in retinal pigment epithelium or histology findings in the eye, issues observed with earlier BACE1 inhibitors.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Butler CR,Brodney MA,Beck EM,Barreiro G,Nolan CE,Pan F,Vajdos F,Parris K,Varghese AH,Helal CJ,Lira R,Doran SD,Riddell DR,Buzon LM,Dutra JK,Martinez-Alsina LA,Ogilvie K,Murray JC,Young JM,Atchison K,Robshaw A,Gondoi
10.1021/jm501833tsubject
Has Abstractpub_date
2015-03-26 00:00:00pages
2678-702issue
6eissn
0022-2623issn
1520-4804journal_volume
58pub_type
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