Cited by 1,827Stress Responses and CortisolNeuropeptides and Animal PhysiologyCancer, Stress, Anesthesia, and Immune Response

The neurobiology of stress: from serendipity to clinical relevance11Published on the World Wide Web on 22 November 2000.

McEwen, Bruce S.·2000·Brain Research

Abstract

The hormones and other physiological agents that mediate the effects of stress on the body have protective and adaptive effects in the short run and yet can accelerate pathophysiology when they are over-produced or mismanaged. Here we consider the protective and damaging effects of these mediators as they relate to the immune system and brain. 'Stress' is a principle focus, but this term is rather imprecise. Therefore, the article begins by noting two new terms, allostasis and allostatic load that are intended to supplement and clarify the meanings of 'stress' and 'homeostasis'. For the immune system, acute stress enhances immune function whereas chronic stress suppresses it. These effects can be beneficial for some types of immune responses and deleterious for others. A key mechanism involves the stress-hormone dependent translocation of immune cells in the blood to tissues and organs where an immune defense is needed. For the brain, acute stress enhances the memory of events that are potentially threatening to the organism. Chronic stress, on the other hand, causes adaptive plasticity in the brain, in which local neurotransmitters as well as systemic hormones interact to produce structural as well as functional changes, involving the suppression of ongoing neurogenesis in the dentate gyrus and remodelling of dendrites in the Ammon's horn. Under extreme conditions only does permanent damage ensue. Adrenal steroids tell only part of the story as far as how the brain adapts, or shows damage, and local tissue modulators - cytokines for the immune response and excitatory amino acid neurotransmitters for the hippocampus. Moreover, comparison of the effects of experimenter-applied stressors and psychosocial stressors show that what animals do to each other is often more potent than what experimenters do to them. And yet, even then, the brain is resilient and capable of adaptive plasticity. Stress-induced structural changes in brain regions such as the hippocampus have clinical ramifications for disorders such as depression, post-traumatic stress disorder and individual differences in the aging process.

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Crossref · 10.1016/s0006-8993(00)02950-4

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  • Persistently elevated physiological reactivity to stress is associated with adverse physical and mental health outcomes over the lifespan.

    “Studies have linked persistently elevated levels of physiological reactivity to stress with adverse physical and mental health outcomes across the lifespan (McEwen, 2000)”

    From Stress and the development of self-regulation in context (2010) · cites this paper as McEwen, 2000

  • In humans, especially adults, chronic stressful environments place sustained demands on stress response systems that become pathogenic in various disease states, known as allostatic load.

    “In humans, primarily in research with adults, chronically stressful environments result in sustained demands on stress response systems that are ultimately pathogenic in a variety of disease states, a phenomenon known as allostatic load (McEwen, 2000; McEwen & Wingfield, 2003).”

    From Stress and the development of self-regulation in context (2010) · cites this paper as McEwen, 2000

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Authors
McEwen, B. S.
Affiliations
Rockefeller University (US)
Corresponding author
McEwen, Bruce S.
Venue
Brain Research
Publisher
Elsevier BV
Published
2000-12
Volume
886
Issue
1-2
Pages
172-189
ISSN
0006-8993 (ISSN-L)
OpenAlex
W2007696393
Cited by
1,827
References
153
Citations by year
2026: 30 · 2025: 38 · 2024: 45 · 2023: 56 · 2022: 54 · 2021: 71 · 2020: 59 · 2019: 63 · 2018: 64 · 2017: 62 · 2016: 88 · 2015: 69 · 2014: 93 · 2013: 85 · 2012: 98
FWCI
3.96
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH-41256, MH-58911, P50MH058911)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Psychiatry and Mental health › Cancer, Stress, Anesthesia, and Immune Response
Keywords
stress, allostasis, allostatic load, homeostasis, acute stress, chronic stress, immune function, stress hormones, glucocorticoids, neurogenesis, dentate gyrus, hippocampus, cytokines, excitatory amino acids, neuroplasticity, brain resilience, psychosocial stress, depression, post-traumatic stress disorder, aging
MeSH terms
Aggression, Animals, Autonomic Nervous System, Cell Division, Cognition Disorders, Dendrites, Glucocorticoids, Hippocampus, Homeostasis, Humans, Hypothalamo-Hypophyseal System, Neuronal Plasticity, Neurons, Pituitary-Adrenal System, Stress, Physiological, Neurotransmitter Agents, Rats

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