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Updated: Jan 28, 2026
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Vagus Nerve Stimulation as a Tool to Induce Plasticity in Pathways Relevant for Extinction Learning
Published on: August 21, 2015
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Cognition-Enhancing Vagus Nerve Stimulation Alters the Epigenetic Landscape.
Teresa H Sanders1,2,3, Joseph Weiss4, Luke Hogewood2
1Department of Pharmacology, teresa.hinkle.sanders@gmail.com.
Summary
Vagus nerve stimulation (VNS) enhances cognition by altering epigenetic markers in the brain, specifically impacting genes related to neuronal plasticity and memory consolidation in rats. These epigenetic changes correlate with improved performance in novelty preference tasks.
Area of Science:
- Neuroscience
- Epigenetics
- Cognitive Science
Background:
- Vagus nerve stimulation (VNS) is known to improve learning and memory.
- The precise molecular mechanisms underlying VNS-induced cognitive enhancement remain largely unknown.
- Epigenetic modifications are crucial for memory formation and cognitive function.
Purpose of the Study:
- To investigate whether epigenetic modulation underlies VNS-induced cognitive improvements.
- To identify specific epigenetic changes in the brain and blood associated with enhanced novelty preference (NP).
- To explore the relationship between epigenetic alterations, gene expression, and behavioral performance in VNS-treated rats.
Main Methods:
- Male Sprague Dawley rats underwent VNS or sham procedures.
- Behavioral assessment using a multiday novelty preference (NP) task.
- Analysis of epigenetic transcriptomes in the hippocampus, cortex, and blood.
- Chromatin immunoprecipitation to assess histone modifications (e.g., γH2A.X) at specific gene promoters.
Main Results:
- VNS enhanced novelty preference (NP) and altered epigenetic landscapes in the hippocampus, cortex, and blood.
- Specific epigenetic changes, including histone deacetylase 11 (HDAC11) and ARC gene expression, correlated with NP test performance.
- VNS modulated plasticity and stress-response signaling genes, with TNFRSF11B (osteoprotegerin) showing significant correlations with NPTP and gene expression.
Conclusions:
- VNS induces widespread epigenetic modifications in the brain, influencing genes critical for memory consolidation and neural plasticity.
- Epigenetic alterations in plasticity and stress-response pathways are linked to VNS-mediated cognitive benefits.
- These findings highlight epigenetic mechanisms as key mediators of VNS cognitive enhancement and suggest potential therapeutic targets.
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