Cited by 71Stress Responses and CortisolMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Disruptive effects of repeated stress on basolateral amygdala neurons and fear behavior across the estrous cycle in rats

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Blume, Shannon R., Padival, Mallika, Urban, Janice H., Rosenkranz, J. Amiel·2019·Scientific Reports

Abstract

Stress is a precipitating factor in depression and anxiety disorders. Patients with these disorders often show amygdala abnormalities. The basolateral amygdala (BLA) is integral in mood and emotion, and is sensitive to stress. While much is known about effects of stress on BLA neuron activity and morphology in males, less is known in females. We tested whether repeated stress exerts distinct effects on BLA in vivo neuronal activity and morphology of Golgi-stained BLA neurons [lateral (LAT) and basal (BA) nuclei] in adult female rats. Repeated restraint stress increased BLA neuronal firing and caused hypertrophy of BLA neurons in males, while it decreased LAT and BA neuronal firing and caused hypotrophy of neurons in the LAT of females. BLA neuronal activity and function, such as fear conditioning, shifts across the estrous cycle. Repeated stress disrupted this pattern of BLA activity and fear expression over the estrous cycle. The disruptive effects of stress on the pattern of BLA function across estrous may produce behavior that is non-optimal for a specific phase of the estrous cycle. The contrasting effects of stress may contribute to sex differences in the effects of stress on mood and psychiatric disorders.

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  1. [44]Blaustein, J.D. In Handbook of Neurochemistry and Molecular Neurobiology, 2nd ed (ed Donald W. Pfaff, A.P.A., Anne M. Etgen, Susan E. Fahrbach and Robert T. Rubin) 67–107 (Springer Science & Business Media, 2009).
  2. [50]Council, N. R. Guide for the Care and Use of Laboratory Animals (National Academies Press, 2011). 21595115

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Authors
Blume, S. R., Padival, M., Urban, J. H., & Rosenkranz, J. A.
Affiliations
Rosalind Franklin University of Medicine and Science (US)
Corresponding author
Rosenkranz, J. Amiel
Venue
Scientific Reports
Published
2019-08-23
Volume
9
Issue
1
Pages
12292-12292
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2969882378
Cited by
71
References
97
Citations by year
2026: 6 · 2025: 7 · 2024: 12 · 2023: 10 · 2022: 9 · 2021: 17 · 2020: 9 · 2019: 1
FWCI
5.88
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
U.S. Department of Health & Human Services | NIH | Office of Extramural Research, National Institutes of Health (R01MH084970, R01MH100536)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
repeated restraint stress, basolateral amygdala, estrous cycle, sex differences, neuronal firing, neuronal morphology, neuronal hypertrophy, fear conditioning, fear behavior, anxiety, depression, female rats
MeSH terms
Action Potentials, Animals, Behavior, Animal, Conditioning, Classical, Endocrine System, Extinction, Psychological, Fear, Female, Golgi Apparatus, Male, Neurons, Stress, Psychological, Rats, Sprague-Dawley, Estrous Cycle, Dendritic Spines, Basolateral Nuclear Complex

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