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Chronic Sleep Deprivation in Mouse Pups by Means of Gentle Handling
Published on: October 11, 2018
[Effects of chronic partial sleep deprivation on growth and learning/memory in young rats]
Fan Jiang1, Xiao-Ming Shen, Sheng-Hui Li
1Department of Child Health Care, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China.
Insights
Chronic sleep deprivation negatively impacts young rats' growth and spatial memory acquisition. These effects on the immature brain highlight the importance of adequate sleep for development.
Area of Science:
- Neuroscience
- Developmental Biology
- Animal Models
Context:
- The effects of sleep deprivation on the developing brain are not well understood.
- Immature brains may be particularly vulnerable to sleep disruption.
- Animal models are crucial for studying sleep's impact on development.
Purpose:
- To investigate the effects of chronic partial sleep deprivation on growth, learning, and memory in young rats.
- To utilize a computer-controlled animal model for precise sleep manipulation.
- To assess physiological and cognitive changes following sleep restriction.
Summary:
- Young rats (3-week-old) underwent 14 days of computer-controlled sleep deprivation.
- Sleep-deprived rats exhibited slower weight gain and reduced thymus weight.
- Spatial learning and memory acquisition were impaired after 7 days but not 14 days of deprivation.
Impact:
- Chronic sleep deprivation adversely affects physical growth in immature mammals.
- Sleep restriction can transiently impair spatial reference memory acquisition in young animals.
- Findings underscore the critical role of sleep in brain development and cognitive function.
Objective:
The effects of sleep deprivation on the immature brain remain unknown. Based on a computer controlled chronic sleep deprivation animal model, the effects of chronic partial sleep deprivation on growth, learning and memory in young rats were explored.
Methods:
Twelve weaned male Spraque-Dawley rats (3-week-old) were randomly divided into sleep deprivation, test control and blank control groups. Sleep deprivation was performed using computer-controlled "disc-over-water" technique at 8-11 am daily, for 14 days. The temperature and weights were measured every 7 days. Morris water maze was used to test spatial learning and memory abilities before and 7 and 14 days after sleep deprivation. After 14 days of sleep deprivation, the rats were sacrificed for weighting their major organs.
Results:
After 14 days of sleep deprivation, the rats' temperature increased significantly. During the sleep deprivation, the rate of weight gain in the sleep deprivation group was much slower than that in the test control and blank control groups. The thymus of the rats subjected to sleep deprivation was much lighter than that of the blank control group. After 7 days of sleep deprivation, the rats showed slower acquisition of reference memory, but were capable of successfully performing the task by repeated exposure to the test. Such impairment of reference memory was not seen 14 days after sleep deprivation.
Conclusions:
Chronic sleep deprivation can affect growth of immature rats, as well as their abilities to acquire spatial reference memory.
