Cited by 380Neurotransmitter Receptor Influence on BehaviorTreatment of Major DepressionStress Responses and Cortisol

Nucleus Accumbens Medium Spiny Neuron Subtypes Mediate Depression-Related Outcomes to Social Defeat Stress

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Francis, T. Chase, Chandra, Ramesh, Friend, Danielle M., Finkel, Eric, Dayrit, Genesis, Miranda, Jorge, Brooks, Julie M., Iñiguez, Sergio D. +3 more·2015·Biological Psychiatry

Abstract

Background The nucleus accumbens is a critical mediator of depression-related outcomes to social defeat stress. Previous studies demonstrate distinct neuroplasticity adaptations in the two medium spiny neuron (MSN) subtypes, those enriched in dopamine receptor D1 versus dopamine receptor D2, in reward and reinforcement leading to opposing roles for these MSNs in these behaviors. However, the distinct roles of nucleus accumbens MSN subtypes, in depression, remain poorly understood.Methods Using whole-cell patch clamp electrophysiology, we examined excitatory input to MSN subtypes and intrinsic excitability measures in D1-green fluorescent protein and D2-green fluorescent protein bacterial artificial chromosome transgenic mice that underwent chronic social defeat stress (CSDS). Optogenetic and pharmacogenetic approaches were used to bidirectionally alter firing of D1-MSNs or D2-MSNs after CSDS or before a subthreshold social defeat stress in D1-Cre or D2-Cre bacterial artificial chromosome transgenic mice.Results We demonstrate that the frequency of excitatory synaptic input is decreased in D1-MSNs and increased in D2-MSNs in mice displaying depression-like behaviors after CSDS. Enhancing activity in D1-MSNs results in resilient behavioral outcomes, while inhibition of these MSNs induces depression-like outcomes after CSDS. Bidirectional modulation of D2-MSNs does not alter behavioral responses to CSDS; however, repeated activation of D2-MSNs in stress naïve mice induces social avoidance following subthreshold social defeat stress.Conclusions Our studies uncover novel functions of MSN subtypes in depression-like outcomes. Notably, bidirectional alteration of D1-MSN activity promotes opposite behavioral outcomes to chronic social stress. Therefore, targeting D1-MSN activity may provide novel treatment strategies for depression or other affective disorders.

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Crossref · 10.1016/j.biopsych.2014.07.021

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  • D1 medium spiny neuron activity is more associated with motivation, reward, positive responses, and stress resilience.

    “Nevertheless, activity in D1 MSNs is more likely to be associated with motivation, reward, and positive responses [193,[223][224][225] and resilience to stress [226].”
  • Susceptibility to chronic social defeat stress is accompanied by atrophy of D1 medium spiny neuron dendrites, but not D2 dendrites.

    “Susceptibility to chronic social defeat stress is accompanied by atrophy of MSN dendrites, specifically in D1 MSNs and not D2 MSNs, and a corresponding loss of dendritic spines [226,234,235].”
  • Susceptibility to chronic social defeat stress is accompanied by loss of dendritic spines in D1 medium spiny neurons.

    “Susceptibility to chronic social defeat stress is accompanied by atrophy of MSN dendrites, specifically in D1 MSNs and not D2 MSNs, and a corresponding loss of dendritic spines [226,234,235].”
  • Susceptibility to social defeat stress increases input resistance and firing in response to depolarizing current pulses in D1 medium spiny neurons, but not D2 neurons.

    “Susceptibility to social defeat stress is accompanied by an increase in input resistance and firing in response to depolarizing currents pulses in D1 MSNs, but not D2 MSNs [226,234].”
  • In chronic social defeat stress susceptible mice, D1 medium spiny neurons show reduced miniature excitatory postsynaptic current frequency and D2 medium spiny neurons show enhanced frequency.

    “We recently found D1-MSNs display reduced mEPSC frequency and D2-MSNs display enhanced frequency of mEPSCs in CSDS susceptible mice (41).”

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Authors
Francis, T. C., Chandra, R., Friend, D. M., Finkel, E., Dayrit, G., Miranda, J., Brooks, J. M., Iñiguez, S. D., O’Donnell, P., Kravitz, A., & Lobo, M. K.
Affiliations
  • University of Maryland, Baltimore (US)
  • National Institutes of Health (US)
  • California State University, San Bernardino (US)
Corresponding author
Lobo, Mary Kay
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2015-02
Volume
77
Issue
3
Pages
212-222
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2141609201
Cited by
379
References
60
Citations by year
2026: 29 · 2025: 28 · 2024: 38 · 2023: 37 · 2022: 36 · 2021: 44 · 2020: 35 · 2019: 41 · 2018: 30 · 2017: 17 · 2016: 21 · 2015: 19 · 2014: 4
FWCI
9.29
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (R01MH106500)
  • National Institute of General Medical Sciences (T34GM083883, SC2GM109811)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
nucleus accumbens, medium spiny neurons, dopamine D1 receptor, dopamine D2 receptor, chronic social defeat stress, depression-like behavior, excitatory synaptic input, intrinsic excitability, social avoidance, neuronal activity modulation, depression resilience
MeSH terms
Action Potentials, Animals, Depressive Disorder, Dominance-Subordination, Male, Mice, Inbred C57BL, Mice, Transgenic, Nucleus Accumbens, Social Behavior, Stress, Psychological, Receptors, Dopamine D1, Receptors, Dopamine D2, Patch-Clamp Techniques, Tissue Culture Techniques, Resilience, Psychological, GABAergic Neurons, Anhedonia, Optogenetics

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