Cited by 194Stress Responses and CortisolNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Mind the gap: glucocorticoids modulate hippocampal glutamate tone underlying individual differences in stress susceptibility

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Nasca, C, Bigio, B, Zelli, D, Nicoletti, F, McEwen, B S·2015·Molecular Psychiatry

Abstract

Why do some individuals succumb to stress and develop debilitating psychiatric disorders, whereas others adapt well in the face of adversity? There is a gap in understanding the neural bases of individual differences in the responses to environmental factors on brain development and functions. Here, using a novel approach for screening an inbred population of laboratory animals, we identified two subpopulations of mice: susceptible mice that show mood-related abnormalities compared with resilient mice, which cope better with stress. This approach combined with molecular and behavioral analyses, led us to recognize, in hippocampus, presynaptic mGlu2 receptors, which inhibit glutamate release, as a stress-sensitive marker of individual differences to stress-induced mood disorders. Indeed, genetic mGlu2 deletion in mice results in a more severe susceptibility to stress, mimicking the susceptible mouse sub-population. Furthermore, we describe an underlying mechanism by which glucocorticoids, acting via mineralocorticoid receptors (MRs), decrease resilience to stress via downregulation of mGlu2 receptors. We also provide a mechanistic link between MRs and an epigenetic control of the glutamatergic synapse that underlies susceptibility to stressful experiences. The approach and the epigenetic allostasis concept introduced here serve as a model for identifying individual differences based upon biomarkers and underlying mechanisms and also provide molecular features that may be useful in translation to human behavior and psychopathology.

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Authors
Nasca, C., Bigio, B., Zelli, D., Nicoletti, F., & McEwen, B. S.
Affiliations
  • Rockefeller University (US)
  • Istituto Neurologico Mediterraneo (IT)
Corresponding author
  • Nasca, C
  • McEwen, B S
Venue
Molecular Psychiatry
Published
2014-09-02
Volume
20
Issue
6
Pages
755-763
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W1998658215
Cited by
194
References
44
Citations by year
2026: 7 · 2025: 9 · 2024: 21 · 2023: 11 · 2022: 13 · 2021: 20 · 2020: 19 · 2019: 23 · 2018: 24 · 2017: 13 · 2016: 22 · 2015: 10 · 2014: 2
FWCI
7.69
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion)
Funders
  • American Foundation for Suicide Prevention
  • Hope for Depression Research Foundation
  • National Institutes of Health
  • National Institute of Mental Health (R01 MH41256, R01MH041256)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
stress vulnerability, individual differences, glucocorticoids, mineralocorticoid receptor, mGlu2 receptor, hippocampus, glutamate release, stress resilience, mood disorders, glutamatergic synapses, inbred mouse strains, biomarkers
MeSH terms
Animals, Disease Models, Animal, Disease Susceptibility, Food Preferences, Glucocorticoids, Hippocampus, Individuality, Mice, Inbred C57BL, Stress, Psychological, Sucrose, Sweetening Agents, Mifepristone, Receptors, Metabotropic Glutamate, Receptors, Mineralocorticoid, Mice, Knockout, Glutamic Acid, Immobility Response, Tonic, Mice

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