Delayed clearance of cerebrospinal fluid tracer from choroid plexus in idiopathic normal pressure hydrocephalus

Sep 10, 2019Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism

Slower removal of fluid tracer from the brain's fluid-producing area in normal pressure hydrocephalus

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Abstract

The peak difference in normalized T1 signals between healthy individuals and those with idiopathic normal pressure hydrocephalus occurred after 24 hours.

  • Impaired clearance of amyloid-β from the choroid plexus may contribute to amyloid deposition in Alzheimer's disease.
  • A cerebrospinal fluid tracer, gadobutrol, was used to assess metabolic waste clearance in individuals with idiopathic normal pressure hydrocephalus.
  • Normalized T1 signal increased to maximum within the choroid plexus and cerebrospinal fluid of lateral ventricles 6-9 hours after gadobutrol administration in both cohorts.
  • Evidence suggests that gadobutrol is resorbed from cerebrospinal fluid by the choroid plexus, but this process is delayed in patients with idiopathic normal pressure hydrocephalus.
  • The role of the choroid plexus in the pathogenesis of idiopathic normal pressure hydrocephalus regarding delayed clearance of amyloid-β remains uncertain.

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