Excitation-inhibition imbalance in medial preoptic area circuits underlies chronic stress-induced depression-like states
Open accessAbstract
Dysregulation of brain homeostasis is associated with neuropsychiatric conditions such as major depressive disorder. However, underlying neural-circuit mechanisms remain not well-understood. We show in mice that chronic restraint stress (CRS) and social defeat stress (SDS) are both associated with disruption of excitation (E)-inhibition (I) balance, with increased E/I ratios, in medial preoptic area (MPOA) circuits, but through affecting different neuronal types. CRS results in elevated activity in glutamatergic neurons, and their suppression mitigates CRS-induced depressive-like behaviors. Paraventricular hypothalamic input to these neurons contributes to induction but not expression of depressive-like behaviors. Their projections to ventral tegmental area and periaqueductal gray/dorsal raphe suppress midbrain dopaminergic and serotonergic activity, respectively, and mediate expression of divergent depressive-like symptoms. By contrast, SDS results in reduced activity of GABAergic neurons, and their activation alleviates SDS-induced depressive-like behaviors. Thus, E/I imbalance with relatively increased excitation in MPOA circuits may be a general mechanism underlying depression caused by different etiological factors. Whether excitatory and inhibitory neural populations in the medial preoptic area of hypothalamus (MPOA) respond differentially under different chronic stress conditions is not fully understood. Here, the authors show that chronic stress induces a disruption of excitation-inhibition balance in mouse MPOA, leading to depression-like states.
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Altered connectivity and disruptions in E/I balance contribute to the core pathophysiology of major depressive disorder.
“These findings align with previous reports indicating altered connectivity [13] and disruptions in E/I balance contribute to the core pathophysiology of major depressive disorder [28, 31, 32].”
From A nucleus accumbens-projecting prefrontal cortex circuit underlies chronic social stress-induced depression-like behaviors (2026) · cites this paper as [28]
Prior studies demonstrate layer-specific or region-specific excitation-inhibition imbalance in stress-related circuits.
“These studies demonstrate layer-specific or region-specific excitation–inhibition imbalance in stress-related circuits”
From A nucleus accumbens-projecting prefrontal cortex circuit underlies chronic social stress-induced depression-like behaviors (2026) · cites this paper as [28]
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Ma, X., Kim, H., Zhang, L., Chen, P., Wei, J., Cui, Y., Chen, L., Xu, Y., Zhang, J., Dai, Z., et al. (2026) · Translational Psychiatry · doi:10.1038/s41398-026-04128-w
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- Authors
- Tao, C., Zhang, G.-W., Sun, W.-J., Huang, J. J., Zhang, L. I., & Tao, H. W.
- Affiliations
- University of Southern California (US)
- Corresponding author
- Zhang, Li I.
- Tao, Huizhong Whit
- Venue
- Nature Communications
- Published
- 2024-10-03
- Volume
- 15
- Issue
- 1
- Pages
- 8575-8575
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC11452203
- OpenAlex
- W4403096276
- Cited by
- 42
- References
- 11
- Citations by year
- 2026: 19 · 2025: 23
- FWCI
- 12.18
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nature Communications (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- U.S. Department of Health & Human Services | NIH | National Eye Institute (EY019049)
- U.S. Department of Health & Human Services | NIH | National Institute of Mental Health (MH116990)
- U.S. Department of Health & Human Services | NIH | National Institute on Deafness and Other Communication Disorders (R01DC008983)
- U.S. Department of Health & Human Services | NIH | National Institute of Neurological Disorders and Stroke (RF1NS132912)
- Topics
- Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
- Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- excitatory-inhibitory imbalance, medial preoptic area, chronic restraint stress, social defeat stress, depression-like behavior, major depressive disorder, glutamatergic neurons, GABAergic neurons, paraventricular hypothalamus, ventral tegmental area, periaqueductal gray, dorsal raphe nucleus, dopaminergic activity, serotonergic activity, neural circuits
- MeSH terms
- Social Defeat, Animals, Behavior, Animal, Depression, Disease Models, Animal, Male, Mice, Inbred C57BL, Neural Pathways, Neurons, Paraventricular Hypothalamic Nucleus, Preoptic Area, Restraint, Physical, Stress, Psychological, Ventral Tegmental Area, Mice, GABAergic Neurons
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