Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Longitudinal analysis of regional grey matter loss in Huntington disease: effects of the length of the expanded CAG repeat
Author: Ruocco, HH
Bonilha, L
Li, LM
Lopes-Cendes, I
Cendes, F
Abstract: Background: The mechanisms guiding the progression of neuronal damage in patients with Huntington disease (HD) are not completely understood. It is unclear whether the genotype-that is, the length of the expanded CAG repeat-guides the location and speed of grey matter decline once HD is clinically manifested. Moreover, the relationship between cortical and subcortical grey matter atrophy and the severity of motor symptoms of HD is controversial. Objectives: In this article, we longitudinally studied, over the period of 1 year, a cohort of 49 patients with HD. We investigated: first, the clinical relevance of regional progressive grey matter atrophy; and second, the relationship between the ratio of atrophy progression and genotype. Methods: The length of the expanded CAG repeat was quantified for all patients and the United Huntington's Disease Rating Scale (UHDRS) was used to rate the severity of clinical symptoms. Grey matter atrophy was determined using voxel-based morphometry (VBM) of brain MRI. Progression of atrophy was quantified in 37 patients who were submitted to two different MRI scans, the second scan 1 year later than the first. Results: Overall, patients exhibited progressive atrophy involving the caudate, pallidum, putamen, insula, cingulate cortex, cerebellum, orbitofrontal cortex, medial temporal lobes and middle frontal gyri. Patients with a larger UHDRS score exhibited selective atrophy of the caudate, thalamus, midbrain, insula and frontal lobes. Patients with longer, expanded CAG repeat sequences showed faster rates and more widespread atrophy, particularly those patients with more than 55 expanded CAG repeats. Conclusions: These results confirm that brain atrophy progresses after the clinical onset of HD and that regional atrophy is related to symptom severity. Moreover, our results also indicate that intensity and rate of progression of brain atrophy are more pronounced in patients with larger, expanded CAG repeat sequences.
Country: Inglaterra
Editor: B M J Publishing Group
Citation: Journal Of Neurology Neurosurgery And Psychiatry. B M J Publishing Group, v. 79, n. 2, n. 130, n. 135, 2008.
Rights: fechado
Identifier DOI: 10.1136/jnnp.2007.116244
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000253091900009.pdf1.83 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.