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Astaxanthin Rescues Memory Impairments in Rats with Vascular Dementia by Protecting Against Neuronal Death in the
Na Wei1,2,3, Luo-Man Zhang4,5,6, Jing-Jing Xu4,5,6
1Department of Pathology, The First Affiliated Hospital of Zhengzhou University, No.1 Jian She Dong Avenue, Zhengzhou, 450002, People's Republic of China. weina@zzu.edu.cn.
Neuromolecular Medicine
|July 16, 2024
Summary
Astaxanthin (AST) significantly improved memory in vascular dementia (VaD) rats by protecting hippocampal neurons. This antioxidant compound reduced neuronal death and apoptosis, offering potential therapeutic benefits for VaD.
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- Vascular dementia (VaD) involves cognitive decline due to cerebrovascular disease, with hippocampal damage causing memory loss.
- Astaxanthin (AST) shows promise for neurodegenerative diseases, but its mechanisms in VaD are unclear.
Purpose of the Study:
- To investigate the therapeutic effects and underlying mechanisms of astaxanthin in a rat model of vascular dementia.
Main Methods:
- A chronic cerebral hypoperfusion (CCH) rat model of VaD was established using bilateral common carotid artery occlusion (BCCAO).
- Rats received daily gastric infusions of astaxanthin (25 mg/kg) for 4 weeks.
- Cognitive function was assessed using Y-maze and Morris water maze tests.
- Hippocampal neuronal death, apoptosis, the PI3K/Akt/mTOR pathway, and oxidative stress were analyzed biochemically.
Main Results:
- Astaxanthin treatment significantly improved memory impairments in VaD rats.
- AST protected against hippocampal neuronal death and reduced apoptosis.
- Astaxanthin modulated the PI3K/Akt/mTOR pathway and demonstrated antioxidant properties, mitigating hippocampal oxidative stress.
Conclusions:
- Astaxanthin exhibits therapeutic potential for vascular dementia by protecting hippocampal neurons, reducing apoptosis, and mitigating oxidative stress.
- The PI3K/Akt/mTOR pathway and antioxidant effects are key mechanisms underlying astaxanthin's neuroprotective actions in VaD.
- Further research is needed to determine optimal dosage and long-term effects for clinical application in VaD.
Keywords:
Alzheimer’s diseaseAstaxanthinNeurodegenerative diseasesNeuronal apoptosisVascular dementia
