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Whole-brain Segmentation and Change-point Analysis of Anatomical Brain MRI—Application in Premanifest Huntington's Disease
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Huntington's disease: a multidisciplinary study

P J Ruiz1, A Del Barrio, T Barroso

  • 1Departments of Neurology, Avda Reyes Católicos 2, Ciudad Universitaria, Madrid 28040, SpainGenetics, Fundación Jimenez Díaz, Avda Reyes Católicos 2, Ciudad Universitaria, Madrid 28040, Spain.

European Journal of Neurology
|November 29, 2013
PubMed

Insights

Huntington's disease (HD) diagnosis is improved by genetic testing. CAG repeat expansion correlates with earlier onset and disease severity, impacting motor and cognitive functions.

Area of Science:

  • Neurogenetics
  • Clinical Neurology

Background:

  • Huntington's disease (HD) presents with motor, cognitive, and psychiatric symptoms.
  • Recent identification of the HD gene enables direct diagnostic testing.
  • This facilitates a more precise approach to studying HD patients.

Purpose of the Study:

  • To conduct a clinical-genetic study on 45 Huntington's disease patients.
  • To investigate the relationship between genetic factors and clinical manifestations.
  • To analyze the progression of motor and cognitive decline in relation to disease stage.

Main Methods:

  • Molecular analysis of CAG repeat expansion in 39 HD patients.
  • Clinical assessment of motor function (akinesia, chorea) and cognitive function (MMSE, Rey, HVOT).
  • Correlation analysis between CAG repeat length, age at onset, parental influence, and functional disability stages.

Main Results:

  • All analyzed patients showed abnormal CAG repeat expansions (41-90 triplets, mean 50.8).
  • A strong inverse correlation was observed between CAG repeat length and age at onset.
  • Parental gender significantly influenced age at onset and triplet number.
  • Motor and cognitive functions (akinesia, chorea, MMSE, Rey scores) declined significantly with disease progression.
  • Hooper Visual Organization Test (HVOT) effectively distinguished early-stage HD patients from controls.
  • Functional disability correlated strongly with motor decline (akinesia, chorea) and moderately with cognitive decline (MMSE, Rey, HVOT).

Conclusions:

  • CAG repeat expansion is a key determinant of HD onset and progression.
  • Motor and cognitive impairments worsen progressively with disease severity.
  • The HVOT is a valuable tool for early HD detection.
  • Genetic analysis combined with clinical assessment provides a comprehensive understanding of HD.

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