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

Chun Yan Ye, Yun Lei, Xi Can Tang, Hai Yan Zhang

Research output: Contribution to journalArticle

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 the first time that the protective effects of donepezil against Aβ-associated mitochondrial dysfunction are closely associated with the reduction of Aβ accumulation in the mitochondria. Above observation led us to assume that, besides potent AChE inhibitory effect, other non-cholinergic mechanisms may be involved in the neuroprotective profiles of donepezil.

Original languageEnglish (US)
Pages (from-to)29-36
Number of pages8
JournalNeuropharmacology
Volume95
DOIs
StatePublished - Aug 2015
Externally publishedYes

Fingerprint

Mitochondria
Acetylcholinesterase
Transgenic Mice
Brain
Mitochondrial Swelling
donepezil
In Vitro Techniques
Cholinesterase Inhibitors
Neuroprotective Agents
Short-Term Memory
Amyloid
Permeability
Alzheimer Disease
Anxiety
Adenosine Triphosphate
Observation
Ions
Calcium
Pharmaceutical Preparations

Keywords

  • Alzheimer's disease
  • Amyloid-β
  • Donepezil
  • Mitochondrial dysfunction
  • Oligomer

ASJC Scopus subject areas

  • Pharmacology
  • Cellular and Molecular Neuroscience

Cite this

Donepezil attenuates Aβ-associated mitochondrial dysfunction and reduces mitochondrial Aβ accumulation in vivo and in vitro. / Ye, Chun Yan; Lei, Yun; Tang, Xi Can; Zhang, Hai Yan.

In: Neuropharmacology, Vol. 95, 08.2015, p. 29-36.

Research output: Contribution to journalArticle

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