Cited by 191Stress Responses and CortisolNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Estrogen Promotes Stress Sensitivity in a Prefrontal Cortex-Amygdala Pathway

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Shansky, R. M., Hamo, C., Hof, P. R., Lou, W., McEwen, B. S., Morrison, J. H.·2010·Cerebral Cortex

Abstract

We have recently reported in male rats that medial prefrontal cortex (mPFC) neurons that project to the basolateral nucleus of the amygdala (BLA) are resilient to stress-induced dendritic remodeling. The present study investigated whether this also occurs in female rats. This pathway was identified using the retrograde tracer Fast Blue injected into the BLA of ovariectomized female rats with estrogen replacement (OVX + E) and without (OVX + veh). Animals were exposed for 10 days either to 2-h immobilization stress or to home cage rest, after which layer III mPFC neurons that were either retrogradely labeled by Fast Blue or unlabeled were filled with Lucifer Yellow and analyzed for apical dendritic length and spine density. No dendritic remodeling occurred in unlabeled neurons from OVX + veh or OVX + E animals. In BLA-projecting neurons, however, stress had no effect on length in OVX + veh animals, but stressed OVX + E females showed greater dendritic length than controls at intermediate branches. Stress also caused an increase in spine density in all neurons in OVX + veh animals and a spine density increase in BLA-projecting neurons in OVX + E females. Estrogen also increased spine density on BLA-projecting neurons in unstressed animals. These data demonstrate both independent effects of estrogen on pyramidal cell morphology and effects that are interactive with stress, with the BLA-projecting neurons being sensitive to both kinds of effects.

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  • Estradiol treatment of ovariectomized females increased spine density in medial prefrontal cortex neurons, irrespective of where they were projecting.

    “Furthermore, estradiol treatment of ovariectomized (OVX) females increased spine density in mPFC neurons, irrespective of where they were projecting.”

    From Neurobiological and Systemic Effects of Chronic Stress (2017) · cites this paper as [104]

  • Ovariectomy prevented these chronic restraint stress effects on dendritic length and branching.

    “Moreover, ovariectomy prevented these CRS effects on dendritic length and branching.”

    From Neurobiological and Systemic Effects of Chronic Stress (2017) · cites this paper as [104]

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Authors
Shansky, R. M., Hamo, C., Hof, P. R., Lou, W., McEwen, B. S., & Morrison, J. H.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • University of Toronto (CA)
  • Rockefeller University (US)
Venue
Cerebral Cortex
Published
2010-02-05
Volume
20
Issue
11
Pages
2560-2567
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2168578366
Cited by
191
References
58
Citations by year
2026: 7 · 2025: 8 · 2024: 6 · 2023: 11 · 2022: 9 · 2021: 17 · 2020: 19 · 2019: 19 · 2018: 11 · 2017: 15 · 2016: 15 · 2015: 15 · 2014: 9 · 2013: 11 · 2012: 10
FWCI
4.00
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH-58911, P50MH058911, MH075506, F32MH075506)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
estrogen, stress sensitivity, medial prefrontal cortex, basolateral amygdala, dendritic remodeling, dendritic spine density, restraint stress, sex differences, ovariectomy, estrogen replacement therapy, pyramidal neurons
MeSH terms
Amygdala, Animals, Disease Models, Animal, Estrogens, Female, Neural Pathways, Stress, Psychological, Rats, Sprague-Dawley, Prefrontal Cortex, Rats

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