Sleep deprivation impairs spatial memory and decreases extracellular signal-regulated kinase phosphorylation in the hippocampus
Abstract
Loss of sleep may result in memory impairment. However, little is known about the biochemical basis for memory deficits induced by sleep deprivation. Extracellular signal-regulated kinase (ERK) is involved in memory consolidation in different tasks. Phosphorylation of ERK is necessary for its activation and is an important step in mediating neuronal responses to synaptic activities. The aim of the present study was to determine the effects of total sleep deprivation (TSD) on memory and ERK phosphorylation in the brain. Rats were trained in Morris water maze to find a hidden platform (a spatial task) or a visible platform (a nonspatial task) after 6 h TSD or spontaneous sleep. TSD had no effect on spatial learning, but significantly impaired spatial memory tested 24 h after training. Nonspatial learning and memory were not impaired by TSD. Phospho-ERK levels in the hippocampus were significantly reduced after 6 h TSD compared to the controls and returned to the control levels after 2 h recovery sleep. Total ERK1 and ERK2 were slightly increased after 6 h TSD and returned to the control levels after 2 h recovery sleep. These alterations were not observed in the cortex after TSD. Protein phosphotase-1 and mitogen-activated protein kinase phosphatase-2, which dephosphorylates phospho-ERK, were also measured, but they were not altered by TSD. The impairments of both spatial memory and ERK phosphorylation indicate that the hippocampus is vulnerable to sleep loss. These results are consistent with the idea that decreased ERK activation in the hippocampus is involved in sleep deprivation-induced spatial memory impairment.
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A 6-hour period of total sleep deprivation by novelty exposure impairs acquisition of a spatial task in the Morris water maze.
“A 6-hour period of total sleep deprivation by novelty exposure impaired acquisition of a spatial task in the Morris water maze.69”
From Sleep Deprivation and Circadian Disruption (2015) · cites this paper as [69]
A 6-hour period of total sleep deprivation by novelty exposure impairs acquisition of a spatial task in the Morris water maze.
“Moreover, a 6-hour period of total sleep deprivation by novelty exposure impaired acquisition of a spatial task in the Morris water maze.35”
From Protective and damaging effects of stress mediators: central role of the brain (2006) · cites this paper as [35]
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- Authors
- Guan, Z., Peng, X., & Fang, J.
- Affiliations
- Pennsylvania State University (US)
- Corresponding author
- Fang, Jidong
- ORCID
- Guan, Zhiwei
- Venue
- Brain Research
- Publisher
- Elsevier BV
- Published
- 2004-08
- Volume
- 1018
- Issue
- 1
- Pages
- 38-47
- ISSN
- 0006-8993 (ISSN-L)
- OpenAlex
- W1979530444
- Cited by
- 208
- References
- 84
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 5 · 2023: 5 · 2022: 6 · 2021: 7 · 2020: 11 · 2019: 13 · 2018: 9 · 2017: 11 · 2016: 11 · 2015: 16 · 2014: 12 · 2013: 16 · 2012: 11
- FWCI
- 3.53
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Brain Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health
- National Heart, Lung, and Blood Institute (HL 64245, R01HL064245)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Keywords
- sleep deprivation, spatial memory, extracellular signal-regulated kinase, ERK1/2 phosphorylation, hippocampus, memory consolidation, recovery sleep, protein phosphatase 1, Morris water maze
- MeSH terms
- Animals, Cerebral Cortex, Hippocampus, Male, Memory Disorders, Phosphoprotein Phosphatases, Phosphorylation, Sleep, Sleep Deprivation, Down-Regulation, Protein Tyrosine Phosphatases, Rats, Sprague-Dawley, Maze Learning, Mitogen-Activated Protein Kinase 1, Mitogen-Activated Protein Kinases, Mitogen-Activated Protein Kinase 3, Rats, Dual-Specificity Phosphatases, Mitogen-Activated Protein Kinase Phosphatases, Protein Phosphatase 2
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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