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Diffusion-weighted imaging in Huntington's disease.

Klaus Seppi1, Michael F H Schocke, Katherina J Mair

  • 1Department of Neurology, Innsbruck Medical University, Innsbruck, Austria. klaus.seppi@uibk.ac.at

Movement Disorders : Official Journal of the Movement Disorder Society
|March 30, 2006
PubMed
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Huntington's disease (HD) shows increased diffusivity in the basal ganglia and thalamus. This diffusion change, measured by Trace(D), may serve as a biomarker for disease severity in patients with HD.

Area of Science:

  • Neuroscience
  • Radiology
  • Genetics

Background:

  • Huntington's disease (HD) is a progressive neurodegenerative disorder.
  • It is caused by an expanded CAG trinucleotide repeat in the huntingtin gene.
  • Neurodegeneration primarily impacts the basal ganglia.

Purpose of the Study:

  • To investigate diffusivity changes in the basal ganglia and thalamus in early Huntington's disease.
  • To evaluate diffusion tensor imaging (Trace(D)) as a potential biomarker for HD severity.

Main Methods:

  • Diffusion tensor imaging (DTI) was used to measure Trace(D) values.
  • The study included 29 patients with early HD and 27 healthy controls.
  • Measurements were taken in the putamen, caudate nucleus, pallidum, and thalamus.

Related Experiment Videos

Main Results:

  • Patients with HD exhibited significantly increased Trace(D) values in the putamen, caudate, pallidum, and thalamus compared to controls.
  • Increased diffusivity in the putamen and caudate correlated with functional impairment and CAG repeat length.
  • These diffusivity changes also correlated with the bicaudate ratio.

Conclusions:

  • Diffusion-weighted imaging, specifically Trace(D), shows potential as a surrogate marker for Huntington's disease severity.
  • Further longitudinal studies are needed to establish its sensitivity to change over time.