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Related Experiment Video

Updated: Jan 22, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

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Published on: February 1, 2012

CD200 dysfunction in neuron contributes to synaptic deficits and cognitive impairment.

Depeng Feng¹, Anqi Huang¹, Wei Yan¹

¹Department of Neurology, Liaocheng People's Hospital, Liaocheng, Shandong, People's Republic of China, 252000.

Biochemical and Biophysical Research Communications

|July 7, 2019

Summary

Neuronal CD200 enhances cognitive and synaptic function in Alzheimer's disease models by modulating microglial activation. Restoring CD200 levels improved memory and prevented synaptic loss, highlighting its therapeutic potential.

Keywords:

Alzheimer's disease CD200 Cognitive function Synaptic plasticity

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Area of Science:

Neuroscience
Immunology
Pathology

Background:

Neuronal CD200 is crucial for neuron-microglia communication and linked to Alzheimer's disease (AD) pathology.
Its specific impact on synaptic function during AD progression remains unclear.

Purpose of the Study:

To investigate the role of neuronal CD200 in modulating microglial activation, synaptic function, and cognitive deficits in an AD mouse model.
To determine if CD200 overexpression or deficiency affects AD pathogenesis.

Main Methods:

Adeno-associated virus (AAV) vectors were used for neuron-specific CD200 overexpression and knockdown in the hippocampus of APP/PS1 mice.
Cognitive function, synaptic function, and microglial activation were assessed.

Main Results:

Overexpression of neuronal CD200 improved cognitive function by inhibiting microglial activation and secretion, enhancing synaptic function, and preventing synaptic loss.
Neuronal CD200 deficiency significantly impaired synaptic and cognitive function.
CD200 modulation directly impacted microglial responses and synaptic integrity.

Conclusions:

Neuronal CD200 plays a critical role in mediating microglial responses and maintaining synaptic function during Alzheimer's disease development.
Restoration of neuronal CD200 ameliorates synaptic and cognitive deficits in AD models, suggesting therapeutic potential.