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Glymphatic System Dysfunction in Central Nervous System Diseases.

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Glymphatic system dysfunction impairs brain waste clearance in neurological diseases. Restoring this pathway via sleep, vascular health, and targeted therapies offers therapeutic potential.

Keywords:
Aquaporin‐4DTI‐ALPSglymphatic systemneurodegenerationperivascular spaces

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Area of Science:

  • Neuroscience
  • Cerebrospinal Fluid Dynamics
  • Brain Homeostasis

Background:

  • The glymphatic system facilitates brain waste clearance via cerebrospinal fluid (CSF)-interstitial fluid (ISF) exchange.
  • Glymphatic dysfunction is a common factor in central nervous system (CNS) diseases, linking vascular, glial, inflammatory, and sleep disturbances to impaired solute clearance.

Purpose of the Study:

  • To review mechanistic and clinical evidence of glymphatic impairment in acute and chronic neurological disorders.
  • To explore mechanisms driving glymphatic dysfunction and clinical assessment methods.
  • To discuss translational strategies for restoring glymphatic clearance.

Main Methods:

  • Synthesis of mechanistic and clinical research on glymphatic function and dysfunction.
  • Review of evidence in conditions including stroke, Alzheimer's, Parkinson's, and multiple sclerosis.
  • Discussion of imaging techniques (e.g., DTI-ALPS) and therapeutic approaches.

Main Results:

  • Glymphatic impairment mechanisms include aquaporin-4 (AQP4) issues, perivascular space obstruction, reduced arterial pulsatility, neuroinflammation, and sleep dysregulation.
  • Clinical evidence links glymphatic dysfunction to cognition, mood, and disease severity.
  • Imaging biomarkers like enlarged perivascular spaces and DTI-ALPS show promise.

Conclusions:

  • Glymphatic dysfunction is a critical pathophysiological axis in numerous neurological diseases.
  • Targeting mechanisms like AQP4, vascular health, inflammation, and sleep can restore clearance.
  • Further research is needed for standardized imaging biomarkers and interventional studies.