Cited by 1,154Vagus Nerve Stimulation ResearchNeuropeptides and Animal PhysiologyHeart Rate Variability and Autonomic Control

Reflex control of immunity

Open access
Tracey, Kevin J.·2009·Nature Reviews Immunology

Abstract

Inflammation can cause damage and even death. What controls this primitive and potentially lethal innate immune response to injury and infection? Molecular and neurophysiological studies during the past decade have revealed a pivotal answer: immunity is coordinated by neural circuits that operate reflexively. The afferent arc of the reflex consists of nerves that sense injury and infection. This activates efferent neural circuits, including the cholinergic anti-inflammatory pathway, that modulate immune responses and the progression of inflammatory diseases. It might be possible to develop therapeutics that target neural networks for the treatment of inflammatory disorders.

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Crossref · 10.1038/nri2566

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  • Activation of the parasympathetic nervous system can modulate the activity of the immune system via alterations in vagal release of acetylcholine from T cells.

    “Interestingly, evidence suggests that activation of the parasympathetic nervous system also can modulate the activity of the immune system via alterations in vagal release of acetylcholine from T cells (Tracey, 2009).”

    From Inflammation in Fear- and Anxiety-Based Disorders: PTSD, GAD, and Beyond (2017) · cites this paper as Tracey, 2009

    The ‘Anatomy of the cholinergic anti-inflammatory pathway’ section says the pathway is functionally neither parasympathetic nor sympathetic, contrary to the claim’s classification. It also describes a hypothesis in which vagus nerve signals prompt splenic nerve endings to release noradrenaline near T cells that produce acetylcholine—not vagal release of acetylcholine from T cells. The paper does support vagal modulation of immune activity, but not the mechanism stated here. (LLM, conf=0.86)

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  • The parasympathetic nervous system modulates immune responses at a regional level through efferent and afferent fibers of the vagus nerve, enabling it to prevent excessive inflammation.

    “Additional evidence suggests that the parasympathetic nervous system modulates immune responses at a regional level through both the efferent and afferent fibers of the vagus nerve, enabling it to prevent excessive inflammation”

    From From stress to inflammation and major depressive disorder: A social signal transduction theory of depression. (2014) · cites this paper as Tracey, 2009

    The afferent-arc and efferent-arc sections describe vagal signals sensing inflammation and suppressing cytokine production in innervated tissues, supporting the reflex and its prevention of excessive inflammation. But the anatomy section explicitly says the cholinergic anti-inflammatory pathway is functionally neither parasympathetic nor sympathetic, so attributing this control specifically to the parasympathetic nervous system overstates the source. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Motor vagus nerve stimulation attenuates the activation of NFκB following an immune challenge.

    “For example, motor vagus nerve stimulation attenuates the activation of NFκB following an immune challenge (Tracey, 2009).”

    From Inflammation in Fear- and Anxiety-Based Disorders: PTSD, GAD, and Beyond (2017) · cites this paper as Tracey, 2009

  • ACh binds to α-7-nicotinic ACh receptors of macrophages to inhibit TNF-α.

    “ACh binds to α-7-nicotinic ACh receptors of those macrophages to inhibit the TNF-α (69).”
  • Vagal activity can modulate immune responses regionally through efferent and afferent fibers to prevent excessive inflammation.

    “with evidence that vagal activity can modulate immune responses at a regional level through both the efferent and afferent fibers of the vagus nerve, to prevent excessive inflammation”

    From Sleep health: Reciprocal regulation of sleep and innate immunity (2017) · cites this paper as Tracey, 2009

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Authors
Tracey, K. J.
Affiliations
Feinstein Institute for Medical Research (US)
Corresponding author
Tracey, Kevin J.
Venue
Nature Reviews Immunology
Published
2009-06
Volume
9
Issue
6
Pages
418-428
ISSN
  • 1474-1733 (ISSN-L)
  • 1474-1741
OpenAlex
W2029051866
Cited by
1,154
References
102
Citations by year
2026: 55 · 2025: 61 · 2024: 49 · 2023: 66 · 2022: 71 · 2021: 77 · 2020: 73 · 2019: 71 · 2018: 66 · 2017: 71 · 2016: 80 · 2015: 75 · 2014: 70 · 2013: 81 · 2012: 68
FWCI
4.87
Type
journal article
Language
en
Open access
Locations
  • Nature reviews. Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • Feinstein Institutes for Medical Research
  • National Institute of General Medical Sciences (R01GM057226)
Topics
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
Keywords
cholinergic anti-inflammatory pathway, acetylcholine, inflammatory cytokines, neural circuits, innate immunity, neuroimmune regulation, inflammatory diseases
MeSH terms
Animals, Cardiovascular Physiological Phenomena, Catecholamines, Efferent Pathways, Homeostasis, Humans, Hypertension, Immunity, Innate, Inflammation, Receptors, Cholinergic, Reflex, Neuroimmunomodulation

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