Longitudinal diffusion tensor imaging in Huntington's Disease.

Abstract:

:Serial diffusion tensor imaging scans were collected at baseline and 1 year follow-up to investigate the neurodegenerative profile of white matter (WM) in seven individuals with the Huntington's Disease (HD) gene mutation and seven control subjects matched on age and gender. In the HD subjects, but not controls, a significant reduction of fractional anisotropy (FA), a measure of WM integrity, between baseline and followup was evident throughout the brain. In addition, a DTI scalar associated with the stability of axons, axial diffusivity, showed significant longitudinal decreases from year 1 to year 2 in HD subjects, declines that overlapped to greater degree with FA discrepancies than longitudinal increases in radial diffusivity, a DTI variable sensitive to demylinization. These preliminary results provide the first longitudinal DTI evidence of WM degeneration in HD and support the notion that FA abnormalities in HD may be a result of axonal injury or withdrawal. These results suggest that longitudinal FA changes may serve as a neuropathological biomarker in HD.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Weaver KE,Richards TL,Liang O,Laurino MY,Samii A,Aylward EH

doi

10.1016/j.expneurol.2008.12.026

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

525-9

issue

2

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(09)00003-X

journal_volume

216

pub_type

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