Cited by 910Tryptophan and brain disordersStress Responses and CortisolNeuroinflammation and Neurodegeneration Mechanisms

Reciprocal regulation of the neural and innate immune systems

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Irwin, Michael R., Cole, Steven W.·2011·Nature Reviews Immunology

Abstract

Innate immune responses are regulated by microorganisms and cell death, as well as by a third class of stress signal from the nervous and endocrine systems. The innate immune system also feeds back, through the production of cytokines, to regulate the function of the central nervous system (CNS), and this has effects on behaviour. These signals provide an extrinsic regulatory circuit that links physiological, social and environmental conditions, as perceived by the CNS, with transcriptional 'decision-making' in leukocytes. CNS-mediated regulation of innate immune responses optimizes total organism fitness and provides new opportunities for therapeutic control of chronic infectious, inflammatory and neuropsychiatric diseases.

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  • Two physiological pathways are responsible for converting social-environmental adversity into broad proinflammatory transcriptional programs such as the CTRA: the sympathetic nervous system and the hypothalamic-pituitary-adrenal axis.

    “Two physiological pathways are responsible for converting social-environmental adversity into broad proinflammatory transcriptional programs such as the CTRA.”

    From From stress to inflammation and major depressive disorder: A social signal transduction theory of depression. (2014) · cites this paper as Irwin & Cole, 2011

    In “Neural influences on disease” (page unavailable), the review says perceived threats activate the SNS and HPA axis to regulate broad transcriptional patterns in innate immune cells, and it reports increased pro-inflammatory gene expression during chronic social adversity. But it distinguishes their effects: SNS activation stimulates pro-inflammatory genes, whereas HPA activation inhibits them; increased inflammation is linked to reduced glucocorticoid signalling. The claim overstates the HPA axis’s role if it presents both pathways as directly producing a pro-inflammatory program. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Although these regions do not directly regulate inflammatory activity, they have anatomical connections to lower level brain regions, including the hypothalamus and brainstem autonomic control nuclei, which influence systemic inflammation by modulating the activity of the HPA axis and SNS.

    “Although these regions do not directly regulate inflammatory activity, they have anatomical connections to lower level brain regions, including the hypothalamus and brainstem autonomic control nuclei, which influence systemic inflammation by modulating the activity of the HPA axis and SNS”

    From From stress to inflammation and major depressive disorder: A social signal transduction theory of depression. (2014) · cites this paper as Irwin & Cole, 2011

    Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured
  • Severe childhood stressors promote the formation of a neural-immune pipeline, wherein inflammatory cytokine signaling between the brain and the periphery is markedly amplified.

    “This hypothesis grows out of mounting evidence that severe childhood stressors promote the formation of a neural-immune pipeline (15), wherein inflammatory cytokine signaling between the brain and the periphery is markedly amplified (16).”

    From Clustering of depression and inflammation in adolescents previously exposed to childhood adversity (2012) · cites this paper as [16]

    The Abstract and ‘Neural influences on disease’ section describe reciprocal brain–immune signaling and report that acute stress can increase circulating pro-inflammatory cytokines. They do not establish that cytokine signaling between the brain and periphery is markedly amplified; the childhood-stressor premise is attached to a different citation. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Norepinephrine modulates immune response gene transcription via stimulation of beta-adrenergic receptors.

    “Once released, norepinephrine modulates immune response gene transcription via stimulation of β -adrenergic receptors”
  • A biologically plausible pathway exists by which stressors occurring in the social environment may influence inflammatory activity.

    “a biologically plausible pathway exists by which stressors occurring in the social environment may influence inflammatory activity”

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Authors
Irwin, M. R., & Cole, S. W.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Irwin, Michael R.
Venue
Nature Reviews Immunology
Published
2011-08-05
Volume
11
Issue
9
Pages
625-632
ISSN
  • 1474-1733 (ISSN-L)
  • 1474-1741
OpenAlex
W2078619626
Cited by
910
References
85
Citations by year
2026: 48 · 2025: 82 · 2024: 61 · 2023: 65 · 2022: 69 · 2021: 82 · 2020: 109 · 2019: 71 · 2018: 46 · 2017: 51 · 2016: 57 · 2015: 59 · 2014: 46 · 2013: 34 · 2012: 26
FWCI
1.80
Type
journal article
Language
en
Open access
Locations
  • Nature reviews. Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Science Foundation Ireland
  • National Institutes of Health (1ul1rr033176-01, UL1TR000124)
  • National Institute on Aging (R01AG026364, R01AG034588, R37AG033590, P30AG028748, R01AG033590)
  • National Heart, Lung, and Blood Institute (R01HL079955)
  • National Institute of Mental Health (R01MH091352)
  • National Institute on Drug Abuse (F31DA024904)
  • National Cancer Institute (R01CA116778, R21CA138687, R01CA119159)
  • National Center for Research Resources (UL1-RR-033176)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
neuroimmune interactions, innate immunity, behavior, cytokines, stress, infection, neuropsychiatric disorders, chronic inflammation, chronic infection
MeSH terms
Central Nervous System, Endocrine System, Genes, MHC Class II, Humans, Immunity, Innate, Inflammation, Leukocytes, Neuroimmunomodulation, Signal Transduction, Cytokines

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