Cited by 62Stress Responses and CortisolNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Distinct Effects of Repeated Restraint Stress on Basolateral Amygdala Neuronal Membrane Properties in Resilient Adolescent and Adult Rats

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Hetzel, Andrea, Rosenkranz, J Amiel·2014·Neuropsychopharmacology

Abstract

Severe and repeated stress has damaging effects on health, including initiation of depression and anxiety. Stress that occurs during development has long-lasting and particularly damaging effects on emotion. The basolateral amygdala (BLA) plays a key role in many affective behaviors, and repeated stress causes different forms of BLA hyperactivity in adolescent and adult rats. However, the mechanism is not known. Furthermore, not every individual is susceptible to the negative consequences of stress. Differences in the effects of stress on the BLA might contribute to determine whether an individual will be vulnerable or resilient to the effects of stress on emotion. The purpose of this study is to test the cellular underpinnings for age dependency of BLA hyperactivity after stress, and whether protective changes occur in resilient individuals. To test this, the effects of repeated stress on membrane excitability and other membrane properties of BLA principal neurons were compared between adult and adolescent rats, and between vulnerable and resilient rats, using in vitro whole-cell recordings. Vulnerability was defined by adrenal gland weight, and verified by body weight gain after repeated restraint stress, and fecal pellet production during repeated restraint sessions. We found that repeated stress increased the excitability of BLA neurons, but in a manner that depended on age and BLA subnucleus. Furthermore, stress resilience was associated with an opposite pattern of change, with increased slow afterhyperpolarization (AHP) potential, whereas vulnerability was associated with decreased medium AHP. The opposite outcomes in these two populations were further distinguished by differences of anxiety-like behavior in the elevated plus maze that were correlated with BLA neuronal excitability and AHP. These results demonstrate a substrate for BLA hyperactivity after repeated stress, with distinct membrane properties to target, as well as age-dependent factors that contribute to resilience to the effects of stress.

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Crossref · 10.1038/npp.2014.60

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Authors
Hetzel, A., & Rosenkranz, J. A.
Affiliations
Rosalind Franklin University of Medicine and Science (US)
Corresponding author
Rosenkranz, J Amiel
Venue
Neuropsychopharmacology
Published
2014-03-12
Volume
39
Issue
9
Pages
2114-2130
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2013095929
Cited by
62
References
137
Citations by year
2026: 3 · 2025: 5 · 2024: 2 · 2023: 7 · 2022: 4 · 2021: 8 · 2020: 5 · 2019: 6 · 2018: 3 · 2017: 5 · 2016: 5 · 2015: 8 · 2014: 1
FWCI
3.11
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Rosalind Franklin University of Medicine and Science
  • National Institute of Mental Health (MH84970, R01MH084970)
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
repeated restraint stress, basolateral amygdala, neuronal membrane properties, neuronal excitability, slow afterhyperpolarization, stress resilience, developmental stress, age-dependent effects, amygdala subnuclei, anxiety-like behavior, elevated plus maze, adrenal weight
MeSH terms
Adrenal Glands, Aging, Animals, Anxiety, Cell Membrane, Defecation, Male, Neurons, Organ Size, Random Allocation, Restraint, Physical, Stress, Psychological, Weight Gain, Rats, Sprague-Dawley, Patch-Clamp Techniques, Maze Learning, Resilience, Psychological, Basolateral Nuclear Complex

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