Cited by 41Sleep and Wakefulness ResearchNeuroinflammation and Neurodegeneration MechanismsTryptophan and brain disorders

Effects of an interleukin-1 receptor antagonist on human sleep, sleep-associated memory consolidation, and blood monocytes

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Schmidt, Eva-Maria, Linz, Barbara, Diekelmann, Susanne, Besedovsky, Luciana, Lange, Tanja, Born, Jan·2015·Brain, Behavior, and Immunity

Abstract

Pro-inflammatory cytokines like interleukin-1 beta (IL-1) are major players in the interaction between the immune system and the central nervous system. Various animal studies report a sleep-promoting effect of IL-1 leading to enhanced slow wave sleep (SWS). Moreover, this cytokine was shown to affect hippocampus-dependent memory. However, the role of IL-1 in human sleep and memory is not yet understood. We administered the synthetic IL-1 receptor antagonist anakinra (IL-1ra) in healthy humans (100mg, subcutaneously, before sleep; n=16) to investigate the role of IL-1 signaling in sleep regulation and sleep-dependent declarative memory consolidation. Inasmuch monocytes have been considered a model for central nervous microglia, we monitored cytokine production in classical and non-classical blood monocytes to gain clues about how central nervous effects of IL-1ra are conveyed. Contrary to our expectation, IL-1ra increased EEG slow wave activity during SWS and non-rapid eye movement (NonREM) sleep, indicating a deepening of sleep, while sleep-associated memory consolidation remained unchanged. Moreover, IL-1ra slightly increased prolactin and reduced cortisol levels during sleep. Production of IL-1 by classical monocytes was diminished after IL-1ra. The discrepancy to findings in animal studies might reflect species differences and underlines the importance of studying cytokine effects in humans.

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  • Translational studies in healthy human volunteers have not produced results similar to those from preclinical animal studies.

    “translational studies of healthy human volunteers have not yielded results similar to those obtained from preclinical animal studies.”

    From Sleep health: Reciprocal regulation of sleep and innate immunity (2017) · cites this paper as Schmidt et al, 2015

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Authors
Schmidt, E.-M., Linz, B., Diekelmann, S., Besedovsky, L., Lange, T., & Born, J.
Affiliations
  • University of Tübingen (DE)
  • University of Lübeck (DE)
Venue
Brain, Behavior, and Immunity
Publisher
Elsevier BV
Published
2015-07
Volume
47
Pages
178-185
ISSN
0889-1591 (ISSN-L)
OpenAlex
W2039878624
Cited by
41
References
83
Citations by year
2026: 3 · 2025: 9 · 2024: 2 · 2023: 4 · 2022: 1 · 2021: 3 · 2020: 2 · 2019: 5 · 2018: 5 · 2017: 2 · 2016: 2 · 2015: 2 · 2014: 1
FWCI
1.30
Type
journal article
Language
en
Open access
Locations
  • Brain Behavior and Immunity (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Site cant be reached (submittedVersion)
  • PuSH - Publication Server of Helmholtz Zentrum München (submittedVersion)
Funders
Deutsche Forschungsgemeinschaft (SFB 654)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
interleukin-1 receptor antagonist, anakinra, IL-1β, sleep regulation, slow-wave sleep, sleep-dependent memory consolidation, declarative memory, blood monocytes, classical monocytes, non-classical monocytes, prolactin, cortisol, cytokine production, neuroendocrine-immune interaction, species differences
MeSH terms
Memory Consolidation, Adolescent, Adrenocorticotropic Hormone, Adult, Humans, Hydrocortisone, Male, Monocytes, Prolactin, Sleep, Human Growth Hormone, Interleukin 1 Receptor Antagonist Protein, Young Adult

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