Cited by 77Autism Spectrum Disorder ResearchNeuroinflammation and Neurodegeneration MechanismsTryptophan and brain disorders

Inflammatory macrophage phenotype in BTBR T+tf/J mice

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Onore, Charity E., Careaga, Milo, Babineau, Brooke A., Schwartzer, Jared J., Berman, Robert F., Ashwood, Paul·2013·Frontiers in Neuroscience

Abstract

Although autism is a behaviorally defined disorder, many studies report an association with increased pro-inflammatory cytokine production. Recent characterization of the BTBR T+tf/J (BTBR) inbred mouse strain has revealed several behavioral characteristics including social deficits, repetitive behavior, and atypical vocalizations which may be relevant to autism. We therefore hypothesized that, asocial BTBR mice, which exhibit autism-like behaviors, may have an inflammatory immune profile similar to that observed in children with autism. The objectives of this study were to characterize the myeloid immune profile of BTBR mice and to explore their associations with autism-relevant behaviors. C57BL/6J (C57) mice and BTBR mice were tested for social interest and repetitive self-grooming behavior. Cytokine production was measured in bone-marrow derived macrophages incubated for 24 h in either growth media alone, LPS, IL-4/LPS, or IFNγ/LPS to ascertain any M1/M2 skewing. After LPS stimulation, BTBR macrophages produced higher levels of IL-6, MCP-1, and MIP-1α and lower IL-10 (p < 0.01) than C57 mice, suggesting an exaggerated inflammatory profile. After exposure to IL-4/LPS BTBR macrophages produced less IL-10 (p < 0.01) than C57 macrophages and more IL-12p40 (p < 0.01) suggesting poor M2 polarization. Levels of IL-12(p70) (p < 0.05) were higher in BTBR macrophages after IFNγ/LPS stimulation, suggesting enhanced M1 polarization. We further observed a positive correlation between grooming frequency, and production of IL-12(p40), IL-12p70, IL-6, and TNFα (p < 0.05) after treatment with IFNγ/LPS across both strains. Collectively, these data suggest that the asocial BTBR mouse strain exhibits a more inflammatory, or M1, macrophage profile in comparison to the social C57 strain. We have further demonstrated a relationship between this relative increase in inflammation and repetitive grooming behavior, which may have relevance to repetitive and stereotyped behavior of autism.

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Authors
Onore, C. E., Careaga, M., Babineau, B. A., Schwartzer, J. J., Berman, R. F., & Ashwood, P.
Affiliations
  • University of California, Davis (US)
  • University of California, San Francisco (US)
Corresponding author
Ashwood, Paul
Venue
Frontiers in Neuroscience
Published
2013
Volume
7
Pages
158-158
ISSN
1662-453X (ISSN-L)
OpenAlex
W1966784044
Cited by
77
References
54
Citations by year
2024: 6 · 2023: 7 · 2022: 12 · 2021: 7 · 2020: 7 · 2019: 4 · 2018: 11 · 2017: 9 · 2016: 3 · 2015: 3 · 2014: 8
FWCI
2.56
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Emch Foundation
  • National Alliance for Research on Schizophrenia and Depression
  • National Institutes of Health
  • National Institute of Mental Health (T32MH073124)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
BTBR T+tf/J mice, autism spectrum disorder, macrophage polarization, M1/M2 macrophages, neuroinflammation, social dysfunction, inflammatory cytokines, IL-12, interleukin-6, IL-10, autism-like behavior

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