Cited by 364Neuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration MechanismsStress Responses and Cortisol

Evidence That Increased Hippocampal Expression of the Cytokine Interleukin-1β Is a Common Trigger for Age- and Stress-Induced Impairments in Long-Term Potentiation

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Murray, Ciara A., Lynch, Marina A.·1998·The Journal of Neuroscience

Abstract

Several cytokines and their receptors are identified in brain; one of these is the proinflammatory cytokine interleukin-1β that is synthesized and released from neurons and glia in response to stress or insult. Among the actions of interleukin-1β is its ability to inhibit long-term potentiation in the hippocampus in vitro, an action that mimics one of the consequences of stress and age. It has been shown that the concentration of interleukin-1β in brain tissue is increased in neurodegenerative conditions, and recent evidence from our laboratory has indicated an increase in the concentration of interleukin-1β in the hippocampus of aged rats. These observations led us to consider that the underlying common cause of impaired long-term potentiation in aged and stressed rats might be increased endogenous interleukin-1β concentration in hippocampus. The data presented here indicate that there was an inverse relationship between concentration of interleukin-1β in the dentate gyrus and long-term potentiation in perforant path→granule cell synapses in aged rats, stressed rats, and rats pretreated with interleukin-1β. The evidence suggested that the cytokine induces formation of reactive oxygen species that triggers lipid peroxidation in vivo, as well as in vitro, and that these changes lead to depletion of membrane arachidonic acid that correlates with impaired long-term potentiation. We propose that three theories of aging, the glucocorticoid theory, the membrane theory, and the free radical theory, constitute three facets of age with one underlying trigger: an increase in the endogenous concentration of interleukin-1β in hippocampus.

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Crossref · 10.1523/jneurosci.18-08-02974.1998

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  • Early reports on aging showed increased IL-1β, reactive oxygen species, and lipid peroxidation levels that corresponded with impaired long-term potentiation (LTP) in the dentate gyrus of aged rats.

    “Early reports on aging showed increased IL-1β, reactive oxygen species, and lipid peroxidation levels that corresponded with impaired long-term potentiation (LTP) in the dentate gyrus of aged rats (Murray and Lynch, 1998).”

    From Microglia Priming with Aging and Stress (2017) · cites this paper as Murray and Lynch, 1998

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  1. Campbell, V and Lynch, M A (1998) Biphasic modulation of intracellu- lar calcium by interleukin-1␤ in rat cortical synaptosomes. J. Physiol (Lond), in press.

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Authors
Murray, C. A., & Lynch, M. A.
Affiliations
Trinity College Dublin (IE)
Venue
The Journal of Neuroscience
Published
1998-04-15
Volume
18
Issue
8
Pages
2974-2981
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W4292340975
Cited by
359
References
51
Citations by year
2026: 4 · 2025: 8 · 2024: 9 · 2023: 7 · 2022: 7 · 2021: 13 · 2020: 18 · 2019: 19 · 2018: 14 · 2017: 16 · 2016: 15 · 2015: 8 · 2014: 16 · 2013: 12 · 2012: 12
FWCI
6.06
Type
journal article
Language
en
Open access
Locations
Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
Funders
Health Research Board
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
IL-1β, hippocampus, long-term potentiation, aging, stress, dentate gyrus, reactive oxygen species, lipid peroxidation, free radical theory of aging, neuroinflammation

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