Donepezil attenuates Aβ-associated mitochondrial dysfunction and reduces mitochondrial Aβ accumulation in vivo and in vitro

Neuropharmacology
Chun-Yan YeHai Yan Zhang

Abstract

The main purpose of the present study is to investigate the influence of donepezil, a well-known acetylcholinesterase (AChE) inhibitor, on amyloid-β (Aβ)-associated mitochondrial dysfunction, in order to gain a better understanding of the neuroprotective effects of this clinically used anti-Alzheimer's disease (AD) drug. First, our study verifies the ameliorative effects of donepezil on behavioral deficits in both working memory and anxiety in APP/PS1 double transgenic mice, at a time point that AChE is not inhibited. Meanwhile, we demonstrate that donepezil enhances the resistance of brain mitochondria of APP/PS1 mice to the induction of mitochondrial permeability transition (MPT) by calcium ions. Moreover, the level of mitochondrial Aβ in the brain of donepezil-treated APP/PS1 transgenic mice is significantly lower than that of vehicle-treated APP/PS1 mice. Our in vitro study using isolated mitochondria from rat brains, which is expected as an AChE-free subcellular system, further confirms the ameliorative effects of donepezil on oligomeric Aβ1-42 induced mitochondrial swelling and ATP reduction. In addition, donepezil treatment also significantly blocks the Aβ accumulation in the isolated mitochondria. Our study reported for...Continue Reading

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Feb 5, 2016·Biochimica Et Biophysica Acta·Angela Maria AmoriniBarbara Tavazzi
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