Glymphatic system research links cholesterol to Alzheimer's disease

Researchers are investigating the role of the glymphatic system, the brain's waste clearance mechanism, in the development of neurodegenerative diseases. This system uses cerebrospinal fluid to flush out metabolic waste and toxic proteins, such as beta-amyloid and tau, through perivascular spaces.

Studies involving mice conducted by the Korea Brain Research Institute suggest that cholesterol may be responsible for clogging these fluid channels, potentially contributing to Alzheimer's disease. While the glymphatic system was first described in 2012, recent findings have highlighted how its efficiency changes with age and state of consciousness.

While some research indicates the system is most active during sleep, other studies, such as those from Imperial College London, suggest waste removal may be more effective during wakefulness. The World Health Organization notes that Alzheimer's accounts for 60 to 70 percent of dementia cases, affecting over 57 million people globally.