Vagus Nerve Stimulation in Neuro-Immune Modulation

The vagus nerve, as the principal parasympathetic conduit, orchestrates bidirectional communication between the central nervous system and the peripheral immune apparatus. Vagus nerve stimulation (VNS), whether invasive or non-invasive, engages afferent and efferent fibres to modulate inflammatory cascades via central reflex arcs and local neuronal circuits. Central to this modulation is the cholinergic anti-inflammatory pathway, wherein acetylcholine release dampens pro-inflammatory cytokine production—particularly tumour necrosis factor-α and interleukin-6—through nicotinic receptors on immune cells. Recent advances span technological innovations such as programmable neuromorphic stimulators that emulate natural firing patterns, to refined transcutaneous approaches targeting auricular and cervical branches for wider clinical applicability. Preclinical and clinical studies have demonstrated VNS-mediated attenuation of systemic and organ-specific inflammation, potential enhancement of mucosal immunity in gastrointestinal disorders, and preliminary efficacy in neuropsychiatric and metabolic conditions. These findings underscore a rapidly evolving landscape in bioelectronic medicine, in which VNS emerges as a versatile tool for neuro-immune regulation with implications for chronic inflammatory diseases, sepsis and beyond.

Research from Nature Portfolio

Innovations in neuromorphic electro-stimulation have delivered semiconductor-based devices that emulate biological spike patterns to activate sympathetic or vagal pathways with minimal tissue damage. By integrating atomically thin floating-gate circuits with flexible electrodes, researchers have achieved targeted stimulation of sympathetic chains at record-low currents, yielding a substantial reduction in circulating interleukin-6 and negligible neuronal injury. Programmable spike profiles enhance precision, while in vivo studies in transgenic models reveal dependence on β2 adrenergic signalling within monocytes and macrophages for anti-inflammatory efficacy. This platform exemplifies a paradigm shift towards highly tunable, damage-free bioelectronic interventions in neuro-immune modulation.

Vagus Nerve Stimulation in Neuro-Immune Modulation publication trend

The graph below shows the total number of articles in vagus nerve stimulation in neuro-immune modulation across all publications each year (not limited to Nature Index journals).

Technical terms

Vagus nerve: The tenth cranial nerve that mediates sensory and motor signals between the brain and visceral organs, central to autonomic regulation.

Vagus nerve stimulation (VNS): Electrical activation of the vagus nerve via implanted or surface electrodes to influence neural and immune functions.

Cholinergic anti-inflammatory pathway: A neuroimmune reflex in which acetylcholine released by vagal efferents binds α7 nicotinic receptors on immune cells to inhibit pro-inflammatory cytokine release.

Transcutaneous VNS (tVNS): Non-invasive stimulation of vagal fibres through skin-applied electrodes, typically targeting auricular or cervical branches.

Neuromorphic electro-stimulation: A bioinspired approach that replicates natural neural firing patterns using programmable electronic circuits to optimise stimulation efficacy and safety.

β2 adrenergic signalling: A pathway in which catecholamines bind β2 adrenergic receptors on immune cells, linking sympathetic neural activity to modulation of inflammation.

References

1. Neuromorphic electro-stimulation based on atomically thin semiconductor for damage-free inflammation inhibition. Nature Communications (2024).
2. The Cholinergic Anti-inflammatory Pathway: A Missing Link in Neuroimmunomodulation. Molecular Medicine (2003).
3. Critical Review of Transcutaneous Vagus Nerve Stimulation: Challenges for Translation to Clinical Practice. Frontiers in Neuroscience (2020).
4. International Consensus Based Review and Recommendations for Minimum Reporting Standards in Research on Transcutaneous Vagus Nerve Stimulation (Version 2020). Frontiers in Human Neuroscience (2021).
5. Treatment of chronic migraine with transcutaneous stimulation of the auricular branch of the vagal nerve (auricular t-VNS): a randomized, monocentric clinical trial. The Journal of Headache and Pain (2015).
6. The Vagus Nerve in the Neuro-Immune Axis: Implications in the Pathology of the Gastrointestinal Tract. Frontiers in Immunology (2017).