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Related Experiment Video

Updated: May 2, 2026

Quantification of Neurovascular Protection Following Repetitive Hypoxic Preconditioning and Transient Middle Cerebral Artery Occlusion in Mice

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Chronic cerebral hypoperfusion causes decrease of O-GlcNAcylation, hyperphosphorylation of tau and behavioral

Yang Zhao¹, Jin-Hua Gu², Chun-Ling Dai³

¹Department of Neurology, The First Hospital of Jilin University, Changchun Jilin, China ; Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities Staten Island, NY, USA.

Frontiers in Aging Neuroscience

|February 28, 2014

Summary

Chronic cerebral hypoperfusion (CCH) impairs memory and cognition. This study reveals CCH alters brain proteins and insulin signaling, linking vascular dementia and Alzheimer's disease pathology.

Keywords:

Alzheimer’s disease O-GlcNAcylation brain insulin signaling chronic cerebral hypoperfusion cognitive impairment neurodegeneration synaptic plasticity markers tau phosphorylation

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Published on: November 22, 2024

Area of Science:

Neuroscience
Pathology
Biochemistry

Background:

Chronic cerebral hypoperfusion (CCH) is implicated in vascular dementia (VaD) and Alzheimer's disease (AD).
The precise mechanisms by which CCH induces cognitive decline and AD pathology remain unclear.
Understanding CCH's impact is crucial for developing therapeutic strategies for dementia.

Purpose of the Study:

To investigate the effects of CCH on cognitive function and brain pathology in a mouse model.
To elucidate the molecular mechanisms linking CCH to neurodegeneration and cognitive impairment.
To explore the potential relationship between CCH, AD, and VaD.

Main Methods:

A mouse model of CCH was established using unilateral common carotid artery occlusion (UCCAO).
Behavioral tests were conducted to assess short-term and long-term spatial memory.
Brain tissue analysis examined protein O-GlcNAcylation, tau phosphorylation, synaptic proteins, insulin signaling, and neurodegeneration.

Main Results:

CCH induced significant short-term memory deficits and mild long-term spatial memory impairment.
A decrease in protein O-GlcNAcylation and an increase in tau phosphorylation were observed.
Synaptic protein dysregulation, altered insulin signaling, and selective neurodegeneration were identified in the brain.

Conclusions:

CCH significantly impairs memory and cognitive functions.
CCH disrupts key molecular pathways, including O-GlcNAcylation, tau phosphorylation, and insulin signaling, contributing to neurodegeneration.
These findings offer mechanistic insights into the link between CCH, VaD, and AD pathology.