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A novel mechanism of memory loss in Alzheimer's disease mice via the degeneration of entorhinal-CA1 synapses

by Yao, C , Zhu, L-q , Liu, D , Yan, H , Wu, J , Pei, L , Li, X , Li, H , Lu, Y , Tian, Q , Yang, X , Tian, T

in Alzheimer's disease / Amyloid / Cortex (entorhinal) / Neurodegeneration / Neurodegenerative diseases / Parvalbumin / Pyramidal cells / Rodents / Senile plaques / Spatial discrimination learning / Spatial memory / Synapses

2018

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A novel mechanism of memory loss in Alzheimer's disease mice via the degeneration of entorhinal-CA1 synapses

by Yao, C , Zhu, L-q , Liu, D , Yan, H , Wu, J , Pei, L , Li, X , Li, H , Lu, Y , Tian, Q , Yang, X , Tian, T

2018

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A novel mechanism of memory loss in Alzheimer's disease mice via the degeneration of entorhinal-CA1 synapses

by Yao, C , Zhu, L-q , Liu, D , Yan, H , Wu, J , Pei, L , Li, X , Li, H , Lu, Y , Tian, Q , Yang, X , Tian, T

2018

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Journal Article

A novel mechanism of memory loss in Alzheimer's disease mice via the degeneration of entorhinal-CA1 synapses

Yao, C,

Zhu, L-q,

Liu, D,

Yan, H,

Wu, J,

Pei, L,

Li, X,

Li, H,

Lu, Y,

Tian, Q,

Yang, X,

Tian, T

2018

Overview

The entorhinal cortex (EC) is one of the most vulnerable brain regions that is attacked during the early stage of Alzheimer's disease (AD). Here, we report that the synaptic terminals of pyramidal neurons in the EC layer II (ECIIPN ) directly innervate CA1 parvalbumin (PV) neurons (CA1PV ) and are selectively degenerated in AD mice, which exhibit amyloid-β plaques similar to those observed in AD patients. A loss of ECIIPN -CA1PV synapses disables the excitatory and inhibitory balance in the CA1 circuit and impairs spatial learning and memory. Optogenetic activation of ECIIPN using a theta burst paradigm rescues ECIIPN -CA1PV synaptic defects and intercepts the decline in spatial learning and memory. These data reveal a novel mechanism of memory loss in AD mice via the selective degeneration of the ECIIPN -CA1PV pathway.

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Publisher

Nature Publishing Group

Subject

Alzheimer's disease

/ Amyloid

/ Cortex (entorhinal)

/ Neurodegeneration

/ Neurodegenerative diseases

/ Parvalbumin

/ Pyramidal cells