Cited by 180Stress Responses and CortisolTryptophan and brain disordersNeuroinflammation and Neurodegeneration Mechanisms

Peripheral and central effects of repeated social defeat stress: monocyte trafficking, microglial activation, and anxiety

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Reader, B.F., Jarrett, B.L., McKim, D.B., Wohleb, E.S., Godbout, J.P., Sheridan, J.F.·2015·Neuroscience

Abstract

The development and exacerbation of depression and anxiety are associated with exposure to repeated psychosocial stress. Stress is known to affect the bidirectional communication between the nervous and immune systems leading to elevated levels of stress mediators including glucocorticoids (GCs) and catecholamines and increased trafficking of proinflammatory immune cells. Animal models, like the repeated social defeat (RSD) paradigm, were developed to explore this connection between stress and affective disorders. RSD induces activation of the sympathetic nervous system (SNS) and hypothalamic-pituitary-adrenal (HPA) axis activation, increases bone marrow production and egress of primed, GC-insensitive monocytes, and stimulates the trafficking of these cells to tissues including the spleen, lung, and brain. Recently, the observation that these monocytes have the ability to traffic to the brain perivascular spaces and parenchyma have provided mechanisms by which these peripheral cells may contribute to the prolonged anxiety-like behavior associated with RSD. The data that have been amassed from the RSD paradigm and others recapitulate many of the behavioral and immunological phenotypes associated with human anxiety disorders and may serve to elucidate potential avenues of treatment for these disorders. Here, we will discuss novel and key data that will present an overview of the neuroendocrine, immunological and behavioral responses to social stressors.

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Crossref · 10.1016/j.neuroscience.2015.01.001

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  • Chronic psychosocial stress promotes an increase in glucocorticoid-insensitive monocyte populations, which can transmigrate across the blood-brain barrier and potentially contribute to long-term anxiety-related behaviors.

    “Furthermore, chronic psychosocial stress promotes an increase in glucocorticoid (GC)-insensitive monocyte populations. Recent studies have also observed that these monocytes possess the ability to transmigrate across the blood–brain barrier, potentially contributing to the development of long-term anxiety-related behaviors [23].”
  • The physiological consequences of repeated social defeat are robustly associated with structural changes in neural systems that modulate threat-sensitivity and anxiety-like behaviors.

    “In addition, the physiological consequences of exposure to RSD are robustly associated with structural changes (e.g., atrophy, connectivity) to neural systems that modulate threat-sensitivity and anxiety-like behaviors (Reader et al., 2015).”
  • RSD is an ethologically relevant social stressor that recapitulates many of the stress-induced immune and behavioral outcomes of stress.

    “Repeated social defeat (RSD) is an ethologically relevant social stressor that recapitulates many of the stress-induced immune and behavioral outcomes of stress (Reader et al, 2015).”

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Authors
Reader, B. F., Jarrett, B. L., McKim, D. B., Wohleb, E. S., Godbout, J. P., & Sheridan, J. F.
Affiliations
  • The Ohio State University Wexner Medical Center (US)
  • Yale University (US)
Corresponding author
Sheridan, J.F.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2015-03
Volume
289
Pages
429-442
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2024776501
Cited by
179
References
110
Citations by year
2026: 5 · 2025: 10 · 2024: 13 · 2023: 12 · 2022: 18 · 2021: 20 · 2020: 9 · 2019: 19 · 2018: 20 · 2017: 20 · 2016: 20 · 2015: 12
FWCI
1.92
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (R01-MH-093473, R01-MH093472)
  • NIH/NIDCR (T32-DE014320)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
repeated social defeat stress, anxiety-like behavior, monocyte trafficking, microglial activation, neuroimmune interactions, hypothalamic-pituitary-adrenal axis, sympathetic nervous system, depression, psychosocial stress
MeSH terms
Animals, Anxiety, Dominance-Subordination, Humans, Monocytes, Stress, Psychological, Microglia

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