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Vagal Nerve Stimulation Protects Against Cerebral Ischemia-Reperfusion Injury in Rats by Inhibiting Autophagy and
Li-Na Zhang1, Xian-Wei Zhang1, Chang-Qing Li2
1Department of Neurology, Chongqing University Three Gorges Hospital, Chongqing, 404000, People's Republic of China.
Neuropsychiatric Disease and Treatment
|April 1, 2021
Summary
Vagal nerve stimulation (VNS) reduces brain damage and neurological deficits after cerebral ischemia-reperfusion injury in rats. VNS achieves this by inhibiting neuronal cell death pathways, specifically autophagy and apoptosis.
Area of Science:
- Neuroscience
- Cellular Biology
Background:
- Neuronal death, including autophagy, apoptosis, and necrosis, is integral to cerebral ischemia-reperfusion (I/R) injury.
- Vagal nerve stimulation (VNS) modulates neuroprotective and neuroplasticity pathways, suggesting therapeutic potential for neurodegenerative diseases.
Purpose of the Study:
- To investigate the neuroprotective effects of VNS against cerebral I/R injury in a rat model.
- To determine if VNS mitigates I/R injury by inhibiting autophagy and apoptosis.
Main Methods:
- Cerebral I/R injury was induced using middle cerebral artery occlusion (MCAO) in rats.
- Vagal nerve stimulation (VNS) was applied to the rats.
- Infarct volume, neurological deficit scores, and markers of autophagy and apoptosis were assessed 24 hours post-reperfusion.
Main Results:
- VNS significantly decreased infarct volume and improved neurological deficit scores in rats subjected to I/R.
- Autophagy and apoptosis were markedly increased in I/R-injured rats.
- VNS treatment effectively inhibited the observed autophagy and apoptosis.
Conclusions:
- Vagal nerve stimulation demonstrates significant neuroprotective effects in the context of cerebral I/R injury.
- The mechanism underlying VNS neuroprotection involves the inhibition of autophagy and apoptosis pathways.
