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Effect of organismal rhythmic activity on Aβ clearance by the glymphatic system
How body rhythms affect clearance of amyloid-beta by the brain’s waste system
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Abstract
Abnormal deposition of β-amyloid (Aβ) is significantly linked to neurodegenerative diseases, particularly Alzheimer's disease (AD).
- The (GS) is crucial for the clearance of Aβ from the brain.
- Cardiovascular rhythms can influence GS transport efficiency by affecting cerebral perfusion pressure and vascular pulsation.
- Respiratory rhythms may impact Aβ clearance by modulating intracranial pressure and cerebrospinal fluid circulation.
- Neural rhythms, including delta waves during non-rapid eye movement sleep, synchronize interactions that enhance GS clearance.
- Circadian rhythms regulate melatonin levels and cerebral blood flow, coordinating the effects of other rhythmic activities on GS function.
- Exercise patterns can influence GS function through the polarization of aquaporin-4 (AQP4).
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Key numbers
65%
Decrease in Aβ clearance
Reduction in Aβ clearance after cardiac arrest within 1 hour.
35%
Increase in AQP4 polarization
AQP4 polarization increase due to δ-waves during NREM sleep.
40%
Decrease in Alzheimer's risk
Reduction in AD risk associated with maintaining cardiorespiratory fitness.