Cited by 47Stress Responses and CortisolEstrogen and related hormone effectsAdrenal Hormones and Disorders

Molecular mechanisms of repeated social defeat-induced glucocorticoid resistance: Role of microRNA

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Jung, Seung Ho, Wang, Yufen, Kim, Taewan, Tarr, Andrew, Reader, Brenda, Powell, Nicole, Sheridan, John F.·2015·Brain, Behavior, and Immunity

Abstract

Glucocorticoid (GC) resistance is a severe problem associated with various inflammatory diseases. Previous studies have shown that repeated social stress induces GC resistance in innate immune cells, but the underlying molecular mechanisms have not been fully elucidated. Therefore, the purpose of this study was to examine potential underlying molecular mechanism(s) of repeated social defeat (RSD) stress on GC resistance in splenic macrophages. It was hypothesized that mRNA expression of receptors for GC and nuclear translocating-associated regulators in splenic macrophages would be affected by RSD, and that these changes would be associated with epigenetic modification. The data showed that the mRNA expression of GC and mineralocorticoid receptors were significantly decreased in splenic macrophages by RSD. RSD also induced a significantly decreased mRNA expression in FK506-binding protein 52 (FKBP52), consequently resulting in a significantly increased ratio of FKBP51 to FKBP52. Moreover, DNA methyltransferases 3a and 3b showed a significant decrease in their mRNA expression in the RSD group as did mRNA expression of histone deacetyltransferase 2. The RSD group also showed a significantly reduced quantity of methylated DNA in splenic macrophages. Based on microRNA (miRNA) profiling data, it was determined that RSD induced significantly increased expression of 9 different miRNAs that were predicted to interact with mRNAs of the GC receptor (6 miRNAs), mineralocorticoid receptor (3 miRNAs) and FKBP52 (2 miRNAs). Spearman correlation analysis revealed significantly strong correlations between the expression of 2 miRNAs and their target mRNA expression for GC receptors. Among these miRNAs, we verified direct effects of miRNA-29b and -340 overexpression on mRNA expression of GC receptors in L929 cells. The overexpression of miRNA-29b or -340 in L929 cells significantly reduced LPS-induced overexpression of GC receptors. In conclusion, this study provides evidence that epigenetic regulation, such as DNA methylation and miRNA expression, may play a role in the RSD-induced GC resistance that we have observed in splenic macrophages.

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  1. Quan N Avitsur R Stark JL He LL Lai WM Dhabhar F Sheridan JF 2003b Molecular mechanisms of glucocorticoid resistance in splenocytes of socially stressed male mice Journal of Neuroimmunology 137 51 58 12667647

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Authors
Jung, S. H., Wang, Y., Kim, T., Tarr, A., Reader, B., Powell, N., & Sheridan, J. F.
Affiliations
  • The Ohio State University Wexner Medical Center (US)
  • Vanderbilt University Medical Center (US)
Venue
Brain, Behavior, and Immunity
Publisher
Elsevier BV
Published
2015-02
Volume
44
Pages
195-206
ISSN
0889-1591 (ISSN-L)
OpenAlex
W1999798541
Cited by
47
References
46
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 3 · 2018: 8 · 2017: 8 · 2016: 8 · 2015: 5
FWCI
3.43
Type
journal article
Language
en
Open access
Locations
  • Brain Behavior and Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIH/NIMH (R01MH093473, R01MH097243)
  • NIDCR (T32DE014320)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
glucocorticoid resistance, repeated social defeat, social stress, splenic macrophages, microRNA, DNA methylation, mineralocorticoid receptor, glucocorticoid receptor, FKBP52, FKBP51, HDAC2, DNA methyltransferases, epigenetic regulation, miR-29b, miR-340, innate immunity
MeSH terms
Tacrolimus Binding Protein 5, Animals, Macrophages, Male, Mice, Inbred C57BL, Receptors, Glucocorticoid, RNA, Messenger, Social Behavior, Spleen, Stress, Psychological, Receptors, Mineralocorticoid, DNA Methylation, Tacrolimus Binding Proteins, MicroRNAs, Epigenesis, Genetic

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