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Published in: Neurotoxicity Research 3/2017

01-10-2017 | ORIGINAL ARTICLE

Resveratrol Attenuates Aβ-Induced Early Hippocampal Neuron Excitability Impairment via Recovery of Function of Potassium Channels

Authors: Hongqiang Yin, Hui Wang, Hui Zhang, Na Gao, Tao Zhang, Zhuo Yang

Published in: Neurotoxicity Research | Issue 3/2017

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Abstract

Alzheimer’s disease (AD) is an age-related neurodegenerative disease. Amyloid-β (Aβ) is not only the morphological hallmark but also the initiator of the pathology process of AD. As a natural compound found in grapes, resveratrol shows a protective effect on the pathophysiology of AD, but the underlying mechanism is not very clear. This study was to investigate whether resveratrol could attenuate Aβ-induced early impairment in hippocampal neuron excitability and the underlying mechanism. The excitability and voltage-gated potassium currents were examined in rat hippocampal CA1 pyramidal neurons by using whole-cell patch-clamp technique. It was found that Aβ25–35 increased the excitability of neurons. Resveratrol could reverse the Aβ25–35-induced increase in the frequency of repetitive firing and the spike half-width of action potential (AP). Moreover, resveratrol can attenuate Aβ25–35-induced decreases in transient potassium channel (I A ) and delay rectifier potassium channel (I K(DR)) of neurons. It was also found that resveratrol could decline the increase of protein kinase A (PKA) and inhibit the activation of PI3K/Akt signaling pathway induced by Aβ25–35. The results suggest that resveratrol alleviates Aβ25–35-induced dysfunction in hippocampal CA1 pyramidal neurons via recovery of the function of I A and I K(DR) by inhibiting the increase of PKA and the activation of PI3K/Akt signaling pathway.
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Metadata
Title
Resveratrol Attenuates Aβ-Induced Early Hippocampal Neuron Excitability Impairment via Recovery of Function of Potassium Channels
Authors
Hongqiang Yin
Hui Wang
Hui Zhang
Na Gao
Tao Zhang
Zhuo Yang
Publication date
01-10-2017
Publisher
Springer US
Published in
Neurotoxicity Research / Issue 3/2017
Print ISSN: 1029-8428
Electronic ISSN: 1476-3524
DOI
https://doi.org/10.1007/s12640-017-9726-9

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