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  • Combining Chalcones with Donepezil to Inhibit Both Cholinesterases and Aβ Fibril Assembly.

Combining Chalcones with Donepezil to Inhibit Both Cholinesterases and Aβ Fibril Assembly.

Molecules (Basel, Switzerland) (2019-12-28)
Nishad Thamban Chandrika, Marina Y Fosso, Oleg V Tsodikov, Harry LeVine Iii, Sylvie Garneau-Tsodikova
ABSTRACT

The fact that the number of people with Alzheimer's disease is increasing, combined with the limited availability of drugs for its treatment, emphasize the need for the development of novel effective therapeutics for treating this brain disorder. Herein, we focus on generating 12 chalcone-donepezil hybrids, with the goal of simultaneously targeting amyloid-β (Aβ) peptides as well as cholinesterases (i.e., acetylcholinesterase (AChE) and butyrylcholinesterase (BChE)). We present the design, synthesis, and biochemical evaluation of these two series of novel 1,3-chalcone-donepezil (15a-15f) or 1,4-chalcone-donepezil (16a-16f) hybrids. We evaluate the relationship between their structures and their ability to inhibit AChE/BChE activity as well as their ability to bind Aβ peptides. We show that several of these novel chalcone-donepezil hybrids can successfully inhibit AChE/BChE as well as the assembly of N-biotinylated Aβ(1-42) oligomers. We also demonstrate that the Aβ binding site of these hybrids differs from that of Pittsburgh Compound B (PIB).

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Palladium on carbon, extent of labeling: 10 wt. % loading (dry basis), matrix carbon powder, wet support
Sigma-Aldrich
TWEEN® 20, BioXtra, viscous liquid