Cited by 1,864Stress Responses and CortisolNeuropeptides and Animal PhysiologyNeuroscience and Neuropharmacology Research

The DOI matches its Crossref record; 159 of the 159 references it cites were found in a registry or an index; none of the 139 sources its claims cite is checked for support yet.

Central effects of stress hormones in health and disease: Understanding the protective and damaging effects of stress and stress mediators

Open access
McEwen, Bruce S.·2008·European Journal of Pharmacology

Abstract

Stress begins in the brain and affects the brain, as well as the rest of the body. Acute stress responses promote adaptation and survival via responses of neural, cardiovascular, autonomic, immune and metabolic systems. Chronic stress can promote and exacerbate pathophysiology through the same systems that are dysregulated. The burden of chronic stress and accompanying changes in personal behaviors (smoking, eating too much, drinking, poor quality sleep; otherwise referred to as "lifestyle") is called allostatic overload. Brain regions such as hippocampus, prefrontal cortex and amygdala respond to acute and chronic stress and show changes in morphology and chemistry that are largely reversible if the chronic stress lasts for weeks. However, it is not clear whether prolonged stress for many months or years may have irreversible effects on the brain. The adaptive plasticity of chronic stress involves many mediators, including glucocorticoids, excitatory amino acids, endogenous factors such as brain neurotrophic factor (BDNF), polysialated neural cell adhesion molecule (PSA-NCAM) and tissue plasminogen activator (tPA). The role of this stress-induced remodeling of neural circuitry is discussed in relation to psychiatric illnesses, as well as chronic stress and the concept of top-down regulation of cognitive, autonomic and neuroendocrine function. This concept leads to a different way of regarding more holistic manipulations, such as physical activity and social support as an important complement to pharmaceutical therapy in treatment of the common phenomenon of being "stressed out". Policies of government and the private sector play an important role in this top-down view of minimizing the burden of chronic stress and related lifestyle (i.e. allostatic overload).

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

This review argues that the brain is the central organ of the stress response and that acute stress mediators are protective/adaptive, whereas chronic or dysregulated allostasis produces “allostatic overload” that damages brain and body. It synthesizes evidence on stress-induced structural plasticity in hippocampus, prefrontal cortex, and amygdala, and discusses top-down behavioral and policy interventions.

Key findings

  • Acute stress responses promote adaptation via neural, cardiovascular, autonomic, immune, and metabolic systems, but chronic stress can promote pathophysiology through the same systems; the cumulative burden plus behaviors such as poor sleep, smoking, overeating, drinking, and inactivity is termed allostatic overload.
  • In hippocampus, chronic restraint stress causes retraction and simplification of CA3 dendrites, while repeated stress causes dendritic shortening in medial prefrontal cortex but dendritic growth in amygdala and orbitofrontal cortex; these changes are largely reversible if chronic stress lasts weeks, though it is unclear whether stress lasting months or years has irreversible brain effects.
  • Adult rat dentate gyrus produces about 9,000 new neurons per day with a half-life of 28 days; the dentate gyrus–CA3 system gives roughly 600-fold amplification of excitation and 300-fold amplification of inhibition.
  • Human findings cited include 12–13% smaller hippocampal volume in individuals with poor self-esteem and low internal locus of control, and lower allostatic load scores in people with 3 or more regular social contacts versus 0–2 contacts; a 12-month modest cortisol regimen did not cause outright neuronal loss in pigtail macaque hippocampus.

Methods

  • Narrative review synthesizing animal and human studies on stress mediators, allostasis/allostatic load, and brain structural plasticity.
  • Evidence includes rodent chronic stress and glucocorticoid studies, nonhuman primate cortisol studies, human neuroimaging, clinical studies of depression/Cushing’s disease/PTSD, and psychosocial studies.
  • Main analysis is conceptual integration of allostasis, allostatic overload, and top-down regulation of cognitive, autonomic, and neuroendocrine function; no primary data or systematic meta-analysis are reported.

Limitations

  • Stated: the interacting allostatic systems are non-linear and cannot all be measured simultaneously, so studies rely on only a few biomarkers and must interpret results with that non-linearity in mind.
  • Stated: it is not clear whether prolonged stress for many months or years may have irreversible effects on the brain; mechanistic differences between chronic restraint stress and chronic corticosterone treatment remain to be determined, and BDNF mRNA findings after chronic restraint stress are contradictory.
  • Evident from the text: as a narrative review, it does not report a systematic search strategy, quality appraisal, or meta-analytic synthesis, and much of the mechanistic evidence comes from animal models, limiting direct causal inference in humans.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.ejphar.2007.11.071

Cites

159 of 159 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

100 Not checked yet · 21 Own interpretation

Verify all 139 references — free account

Show all 69 claims

  • Probably not a substantial claim. 15
  • It may state two separate claims as one. 43
52 of 52
  • The paper relies on this without support.

    The amygdala and prefrontal cortex contain adrenal steroid receptors.

    “Along with many other brain regions, the amygdala and prefrontal cortex also contain adrenal steroid receptors”
  • The paper relies on this without support.

    Adrenocortical hormones enter the brain and produce a wide range of effects upon it.

    “We now know that adrenocortical hormones enter the brain and produce a wide range of effects upon it.”
  • The paper relies on this without support.

    Both major depression and Cushing’s disease are associated with chronic elevation of cortisol that results in gradual loss of minerals from bone and abdominal obesity.

    “Both major depression and Cushing’s disease are associated with chronic elevation of cortisol that results in gradual loss of minerals from bone and abdominal obesity.”
  • The paper relies on this without support.

    There are many useful pharmaceutical agents (sleeping pills, anxiolytics, beta blockers and antidepressants) that are used to counteract some of the problems associated with being stressed out.

    “In fact, there are many useful pharmaceutical agents: sleeping pills, anxiolytics, beta blockers and antidepressants are all drugs that are used to counteract some of the problems associated with being stressed out.”
  • The paper relies on this without support.

    Drugs that reduce oxidative stress or inflammation, block cholesterol synthesis or absorption and treat insulin resistance or chronic pain can help deal with the metabolic and neurologic consequences of being stressed out.

    “Likewise, drugs that reduce oxidative stress or inflammation, block cholesterol synthesis or absorption and treat insulin resistance or chronic pain and can help deal with the metabolic and neurologic consequences of being stressed out.”
  • The paper relies on this without support.

    Motivation and decision making and perseverance are all functions of the brain.

    “Motivation and decision making and perseverance are all functions of the brain!”
  • The paper relies on this without support.

    Animal studies of stress effects on brain structure are relevant to the human brain.

    “Much of the impetus for studying the effects of stress on the structure of the human brain has come from the animal studies summarized thus far.”
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Citations

Cites

Research works printed but not linked: 2

  1. Cockburn, 1988, Marsupial femmes fatales, Nat. Hist., 97, 40
  2. Kaufman, 1999, Neurobiological correlates of child abuse, Biol. Psychiatry, 45, 1235

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Metadata

Authors
McEwen, B. S.
Affiliations
Rockefeller University (US)
Corresponding author
McEwen, Bruce S.
Venue
European Journal of Pharmacology
Publisher
Elsevier BV
Published
2008-04
Volume
583
Issue
2-3
Pages
174-185
ISSN
0014-2999 (ISSN-L)
OpenAlex
W1969412681
Cited by
1,864
References
159
Citations by year
2026: 69 · 2025: 85 · 2024: 90 · 2023: 90 · 2022: 111 · 2021: 119 · 2020: 139 · 2019: 110 · 2018: 116 · 2017: 115 · 2016: 123 · 2015: 94 · 2014: 102 · 2013: 95 · 2012: 118
FWCI
7.09
Type
journal article
Language
en
Open access
Locations
  • European Journal of Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (MH-41256, R37MH041256, P50MH058911, R01MH041256, 5-P50MH58911)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
chronic stress, stress hormones, glucocorticoids, allostatic overload, hippocampus, prefrontal cortex, amygdala, neuroplasticity, brain-derived neurotrophic factor, PSA-NCAM, tissue plasminogen activator, excitatory amino acids, lifestyle habits, mental illness, top-down control, physical activity, social support, neuroendocrine function, autonomic function
MeSH terms
Animals, Mental Disorders, Brain, Glucocorticoids, Humans, Stress, Physiological, Allostasis

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