Cited by 413Tryptophan and brain disordersStress Responses and CortisolNeuroinflammation and Neurodegeneration Mechanisms

Inflammation and social experience: An inflammatory challenge induces feelings of social disconnection in addition to depressed mood

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Eisenberger, Naomi I., Inagaki, Tristen K., Mashal, Nehjla M., Irwin, Michael R.·2010·Brain, Behavior, and Immunity

Abstract

Although research has established links between feelings of social isolation and inflammation, the direction of these effects is unclear. Based on the role that proinflammatory cytokines play in initiating "sickness behavior," which includes symptoms such as social withdrawal, it is possible that inflammatory processes heighten feelings of 'social disconnection.' Here, we examined whether exposure to an inflammatory challenge increased self-reported feelings of social disconnection. In addition, because both inflammatory processes and feelings of social disconnection contribute to depressive symptoms, we also explored whether increases in feelings of social disconnection played a role in the link between inflammation and depressed mood. Participants were randomly assigned to either receive endotoxin, an inflammatory challenge, or placebo. Proinflammatory cytokines (IL-6, TNF-alpha) were collected at baseline and then hourly for 6h. Participants completed self-reports of sickness symptoms ("fatigue"), social disconnection ("I feel disconnected from others"), and depressed mood ("unhappy") hourly. Results revealed that endotoxin led to significant increases (from baseline) in IL-6 and TNF-alpha levels as well as feelings of social disconnection and depressed mood. Moreover, controlling for increases in social disconnection eliminated the relationship between exposure to inflammatory challenge and depressed mood. This study demonstrates that inflammation can have social psychological consequences, which may play a role in cytokine-related depressive symptoms.

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Crossref · 10.1016/j.bbi.2009.12.009

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  • Endotoxin administration in healthy controls increases IL-6 and TNF-α levels and amygdala response to socially threatening stimuli.

    “Specifically, endotoxin administration in healthy controls increases IL-6 and TNF-α levels (Eisenberger et al, 2010) and amygdala response to socially threatening stimuli (Harrison et al, 2009b;Inagaki et al, 2012).”

    From Inflammation in Fear- and Anxiety-Based Disorders: PTSD, GAD, and Beyond (2017) · cites this paper as Eisenberger et al, 2010

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  1. Suffredini AF O’Grady NP Braude H Opal SM Vogel SN Morrison DC Pathophysiologic responses to endotoxin in humans Endotoxin in Health and Disease 1999 1st Edition New York Marcel Dekker 817 830

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Authors
Eisenberger, N. I., Inagaki, T. K., Mashal, N. M., & Irwin, M. R.
Affiliations
  • University of California, Los Angeles (US)
  • Northwestern University (US)
Corresponding author
Eisenberger, Naomi I.
Venue
Brain, Behavior, and Immunity
Publisher
Elsevier BV
Published
2010-05
Volume
24
Issue
4
Pages
558-563
ISSN
0889-1591 (ISSN-L)
OpenAlex
W2161296293
Cited by
413
References
27
Citations by year
2026: 32 · 2025: 25 · 2024: 24 · 2023: 25 · 2022: 33 · 2021: 38 · 2020: 26 · 2019: 21 · 2018: 28 · 2017: 20 · 2016: 27 · 2015: 24 · 2014: 25 · 2013: 14 · 2012: 26
FWCI
7.37
Type
journal article
Language
en
Open access
Locations
  • Brain Behavior and Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Dana Foundation
  • National Institute on Aging (AG 026364, R01AG026364, R01AG034588, P30AG028748)
  • National Heart, Lung, and Blood Institute (HL 079955, R01HL079955)
  • National Institute of Mental Health (T32MH019925, T32 MH 19925)
  • National Cancer Institute (R01CA116778, CA-10014152, CA-116778)
  • National Center for Research Resources ((M01 RR00865), M01RR000865)
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
inflammation, social disconnection, social isolation, endotoxin, sickness behavior, inflammatory cytokines, interleukin-6, TNF-α, depressive mood, depressive symptoms, fatigue, social withdrawal
MeSH terms
Adolescent, Adult, Depression, Double-Blind Method, Endotoxins, Fatigue, Female, Humans, Inflammation, Interpersonal Relations, Male, Social Behavior, Tumor Necrosis Factor-alpha, Interleukin-6, Young Adult

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