Voluntary exercise ameliorates synaptic pruning deficits in sleep-deprived adolescent mice
Li-Heng Tuan1, Chih-Yu Tsao1, Lukas Jyuhn-Hsiarn Lee2
1Graduate Institute of Anatomy and Cell Biology, National Taiwan University, Taipei, Taiwan, ROC.
Brain, Behavior, and Immunity
|December 28, 2020
Summary
Voluntary exercise (VE) protects adolescent brains from sleep deprivation (SD) by maintaining microglial function and synaptic pruning. Physical activity can mitigate the negative effects of insufficient sleep on adolescent brain health.
Area of Science:
- Neuroscience
- Adolescent Development
- Sleep Research
Background:
- Adolescence is a critical period for brain development.
- Sleep insufficiency negatively impacts adolescent physical and mental health.
- Previous studies indicated sleep deprivation disrupts microglia, essential for synaptic pruning.
Purpose of the Study:
- To investigate the protective effects of voluntary exercise (VE) on microglial function in adolescent sleep deprivation (SD).
- To elucidate the underlying mechanisms of VE's protective effects against SD-induced brain abnormalities.
Main Methods:
- Utilized a 72-hour sleep deprivation (SD) model in adolescent mice.
- Administered 11 days of voluntary exercise (VE).
- Assessed hippocampal neuronal activity, short-term memory, dendritic spine density, microglial phagocytic ability, and noradrenergic signaling.
Main Results:
- VE prevented aberrant hippocampal neuronal activity and impaired short-term memory in SD mice.
- VE normalized SD-induced dendritic spine increases and maintained microglial phagocytic capacity.
- VE amended central nervous system noradrenergic signaling, potentially explaining its protective effects.
Conclusions:
- Voluntary exercise confers protection to microglia-mediated synaptic pruning in adolescent brains affected by sleep deprivation.
- Physical exercise may serve as a beneficial intervention for adolescents experiencing sleep insufficiency.
- VE offers a promising strategy to counteract the adverse neurological impacts of sleep deprivation in adolescents.
