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Why Are Perivascular Spaces Important?

Tatyana Shulyatnikova1, Melvin R Hayden2

  • 1Department of Pathological Anatomy and Forensic Medicine, Zaporizhzhia State Medical University, Mayakovsky Avenue, 26, 69035 Zaporizhzhia, Ukraine.

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Summary
This summary is machine-generated.

Enlarged perivascular spaces (EPVS), visible via MRI, are linked to aging, hypertension, and neurodegenerative diseases like Alzheimer's. These spaces are crucial for clearing brain waste via the glymphatic system.

Keywords:
CADISILbrain MRIcapillary rarefactioncerebral small vessel diseaseenlarged perivascular spacesglymphatic systemimpaired cognitionlacunesneurodegenerationwhite matter hyperintensities

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Area of Science:

  • Neuroimaging
  • Cerebrovascular Health
  • Neurodegenerative Diseases

Background:

  • Perivascular spaces (PVS) and their enlarged form (EPVS) are increasingly recognized in neuroimaging.
  • EPVS are associated with aging, hypertension, and cerebral small vessel disease (SVD).
  • These spaces are vital for the glymphatic pathway, responsible for clearing metabolic waste from the brain.

Purpose of the Study:

  • To highlight the growing interest in EPVS as a biomarker.
  • To discuss the role of EPVS in the glymphatic system's waste clearance function.
  • To explore the association of EPVS with neurodegenerative conditions and aging.

Main Methods:

  • Non-invasive visualization of EPVS using T2-weighted magnetic resonance imaging (MRI).
  • Observation of EPVS distribution in common brain regions (basal ganglia, centrum semiovale, frontal cortex, hippocampus).

Main Results:

  • EPVS are frequently observed in aging and hypertensive individuals, serving as a biomarker for SVD.
  • EPVS are implicated in the clearance of neurotoxic proteins like amyloid beta and tau, relevant to late-onset Alzheimer's disease (LOAD).
  • Increased EPVS are also linked to Parkinson's disease and multiple sclerosis (MS).

Conclusions:

  • EPVS visualization via MRI offers a non-invasive method to assess brain health.
  • Dysfunction in EPVS may contribute to the accumulation of toxic proteins, potentially driving neurodegeneration.
  • EPVS serve as a critical indicator for various neurological disorders and aging processes.