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Updated: Aug 24, 2025

Chronic Sleep Deprivation in Mouse Pups by Means of Gentle Handling
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Shift work-like patterns effect on female and male mouse behavior.

Gareth Banks1, Patrick M Nolan1, Nora Bourbia1,2

  • 1MRC Harwell Institute, Harwell Science and Innovation Campus, Harwell, Oxfordshire, OX11 0RD, UK.

Neurobiology of Sleep and Circadian Rhythms
|October 21, 2022
PubMed
Summary

Shift work disrupts circadian rhythms, but mice showed few behavioral changes. Sex and disruption type influenced light aversion and activity, suggesting rhythmicity may mitigate some health impacts.

Keywords:
Circadian rhythmMouse behaviorShift-work

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Area of Science:

  • Chronobiology
  • Behavioral Neuroscience
  • Animal Models

Background:

  • Shift work is prevalent and linked to health issues like sleep and mental disorders.
  • Understanding the biological impact of shift work is crucial for public health.
  • Animal models offer insights into the physiological effects of circadian disruption.

Purpose of the Study:

  • To investigate the behavioral effects of light-induced shift work patterns in male and female mice.
  • To assess anxiety-like behavior, exploration, marble burying, startle reflex, and circadian rhythms.
  • To identify sex-specific and disruption-specific responses to shift work simulations.

Main Methods:

  • Male and female mice were exposed to two distinct light-induced shift work patterns for six weeks.
  • Behavioral tests included anxiety-like behavior, exploration, marble burying, and startle reflex.
  • Wheel running activity and light aversion were monitored to assess circadian rhythmicity and behavioral changes.

Main Results:

  • No significant differences were observed in exploration, marble burying, or startle reflex across groups.
  • Sex-specific and disruption-specific effects were noted in light aversion and wheel running activity.
  • Animals in disruptive conditions maintained some rhythmicity, potentially explaining the lack of widespread behavioral changes.

Conclusions:

  • Circadian rhythm disruptions from shift work can induce sex-specific behavioral alterations, particularly in light aversion and activity patterns.
  • The maintenance of some rhythmicity in shift work models may buffer against more pronounced behavioral deficits.
  • Further research is needed to fully elucidate the long-term health consequences of shift work and potential mitigation strategies.