Maintaining Aging Hippocampal Function with Safe and Feasible Shaking Exercise in SAMP10 Mice

Area of Science:

• Neuroscience
• Gerontology
• Exercise Physiology

Background:

• Dementia poses significant societal challenges due to its disabling effects, despite minimal impact on mortality.
• Effective, low-cost interventions are needed to delay or prevent dementia onset.

Purpose of the Study:

• To investigate the efficacy of a simple physical exercise, shaking, in preventing or delaying dementia-related cognitive decline.
• To assess the impact of shaking exercise on motor function, hippocampal aging, and cognitive performance in senescence-accelerated mice.

Main Methods:

• Senescence-accelerated model-prone (SAMP) 10 mice underwent a 25-week shaking exercise regimen.
• Behavioral experiments evaluated motor function, learning ability, and spatial cognition.
• Hippocampal morphology was analyzed to assess aging, and its correlation with behavioral outcomes was examined.

Main Results:

• Mice in the shaking group exhibited significantly improved motor coordination and learning abilities.
• Enhanced learning and spatial cognitive functions were observed in the shaking group.
• Delayed cellular aging in the dentate gyrus (DG) and cornu Ammonis (CA) regions of the hippocampus was noted.

Conclusions:

• Shaking exercise effectively combats age-associated declines in learning and spatial cognition.
• The exercise regimen preserves hippocampal morphology by preventing protein accumulation, cell atrophy, and cell loss.
• Shaking exercise promotes neuronal health and function, particularly in the DG, CA3, and CA1 regions, thereby mitigating spatial memory decline.