Cited by 403Circadian rhythm and melatoninSleep and Wakefulness ResearchGenetic Neurodegenerative Diseases

Disintegration of the sleep-wake cycle and circadian timing in Huntington's disease

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Morton, A. Jennifer, Wood, Nigel I., Hastings, Michael H., Hurelbrink, Carrie, Barker, Roger A., Maywood, Elizabeth S.·2005·The Journal of Neuroscience

Abstract

Sleep disturbances in neurological disorders have a devastating impact on patient and carer alike. However, their pathological origin is unknown. Here we show that patients with Huntington's disease (HD) have disrupted night-day activity patterns. This disruption was mirrored in a transgenic model of HD (R6/2 mice) in which daytime activity increased and nocturnal activity fell, eventually leading to the complete disintegration of circadian behavior. The behavioral disturbance was accompanied by marked disruption of expression of the circadian clock genes mPer2 and mBmal1 in the suprachiasmatic nuclei (SCN), the principal circadian pacemaker in the brain. The circadian peak of expression of mPer2 was prematurely truncated, and the mRNA levels of mBmal1 were attenuated and failed to exhibit a significant circadian oscillation. Circadian cycles of gene expression in the motor cortex and striatum, markers of behavioral activation in wild-type mice, were also suppressed in the R6/2 mice, providing a neural correlate of the disturbed activity cycles. Increased daytime activity was also associated with reduced SCN expression of prokineticin 2, a transcriptional target of mBmal1 encoding a neuropeptide that normally suppresses daytime activity in nocturnal mammals. Together, these molecular abnormalities could explain the pathophysiological changes in circadian behavior. We propose that circadian sleep disturbances are an important pathological feature of HD, that they arise from pathology within the SCN molecular oscillation, and that their treatment will bring appreciable benefits to HD patients.

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Crossref · 10.1523/jneurosci.3842-04.2005

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  • Circadian and sleep misalignment likely influence the neurodegenerative process itself.

    “Of note, circadian and sleep misalignment likely influence the neurodegenerative process itself (Ju et al., 2014, Mamelak, 1997, Morton et al., 2005).”

    From Circadian dysregulation in Parkinson's disease (2017) · cites this paper as Morton et al., 2005

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Authors
Morton, A. J., Wood, N. I., Hastings, M. H., Hurelbrink, C., Barker, R. A., & Maywood, E. S.
Affiliations
  • University of Cambridge (GB)
  • MRC Laboratory of Molecular Biology (GB)
  • Addenbrooke's Hospital (GB)
Venue
The Journal of Neuroscience
Published
2005-01-05
Volume
25
Issue
1
Pages
157-163
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2126357344
Cited by
403
References
43
Citations by year
2026: 4 · 2025: 13 · 2024: 21 · 2023: 11 · 2022: 16 · 2021: 14 · 2020: 12 · 2019: 30 · 2018: 18 · 2017: 29 · 2016: 26 · 2015: 24 · 2014: 21 · 2013: 22 · 2012: 24
FWCI
6.25
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Alexander and Margaret Stewart Trust
  • Hereditary Disease Foundation
  • Sir Halley Stewart Trust
  • Medical Research Council
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
Keywords
Huntington's disease, circadian rhythm, sleep-wake cycle, clock genes, mPer2, suprachiasmatic nucleus, R6/2 mice, prokineticin 2, diurnal activity, nocturnal activity, striatum, motor cortex, circadian gene expression, sleep disorders
MeSH terms
Adult, Aged, Animals, Disease Models, Animal, Female, Gene Expression Regulation, Humans, Huntington Disease, Male, Mice, Transgenic, Middle Aged, Motor Activity, Suprachiasmatic Nucleus, Sleep Disorders, Circadian Rhythm, Dyssomnias, Chronobiology Disorders, Mice

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