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Oral administration of grape seed polyphenol extract restores memory deficits in chronic cerebral hypoperfusion rats
Chen Chen1, Yake Zheng, Tianwen Wu
1Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China.
Insights
Grape seed polyphenol extract (GSPE) can reverse memory loss in rats with chronic cerebral hypoperfusion (CCH). GSPE combats oxidative stress and restores brain function, offering a potential therapy for CCH-induced memory impairment.
Area of Science:
- Neuroscience
- Pharmacology
- Gerontology
Background:
- Chronic cerebral hypoperfusion (CCH) is a key factor in vascular dementia and Alzheimer's disease (AD), leading to memory impairment.
- Current therapies for CCH-induced memory deficits are insufficient.
- Grape seed polyphenol extract (GSPE) possesses antioxidant properties and neuroprotective effects against ischemic injury.
Purpose of the Study:
- To investigate the efficacy of GSPE in preventing and treating memory impairment associated with CCH.
- To explore the underlying mechanisms of GSPE's action in a rat model of CCH.
Main Methods:
- CCH was induced in rats via permanent bilateral common carotid artery occlusion.
- Memory function was assessed using the Morris water maze task.
- Cholinergic function and oxidative stress markers (acetylcholinesterase, choline acetyltransferase, acetylcholine, SOD, GPx, MDA, catalase) were analyzed.
Main Results:
- Oral GSPE administration for one month significantly improved memory deficits in CCH rats.
- GSPE treatment restored cholinergic neuronal function in the hippocampus.
- GSPE effectively reduced oxidative stress markers in the hippocampus of CCH rats.
Conclusions:
- GSPE demonstrates potential as a therapeutic agent for CCH-induced memory impairment.
- GSPE's protective effects are attributed to the reduction of ischemia-induced oxidative stress and cholinergic dysfunction.
- These findings suggest a novel application for GSPE in managing neurodegenerative conditions linked to CCH.
Abstract:
Chronic cerebral hypoperfusion (CCH) has been recognized as an important cause of both vascular dementia and Alzheimer's disease (AD), the two most prominent neurodegenerative diseases causing memory impairment in the elderly. However, an effective therapy for CCH-induced memory impairment has not yet been established. Grape seed polyphenol extract (GSPE) has powerful antioxidant properties and protects neurons and glia during ischemic injury, but its potential use in the prevention of CCH-induced memory impairment has not yet been investigated. Here, CCH-related memory impairment was modeled in rats using permanent bilateral occlusion of the common carotid artery. A Morris water maze task was used to evaluate memory, the levels of acetylcholinesterase, choline acetyltransferase, acetylcholine were used to evaluate cholinergic function, and oxidative stress was assessed by measuring the enzyme activity of superoxide dismutase, glutathione peroxidase, malonic dialdehyde, and catalase. We found that oral administration of GSPE for 1 month can rescue memory deficits. We also found that GSPE restores cholinergic neuronal function and represses oxidative damage in the hippocampus of CCH rats. We propose that GSPE protects memory in CCH rats by reducing ischemia-induced oxidative stress and cholinergic dysfunction. These findings provide a novel application of GSPE in CCH-related memory impairments.
