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• W2522427082 abstract "Huntington disease is caused by an abnormally expanded CAG trinucleotide repeat in the HTT gene. Age and CAG-expansion number are related to age at diagnosis, and can be used to index disease progression. However, observed onset-age variability suggests that other factors also modulate progression. Indexing prodromal (pre-diagnosis) progression may highlight therapeutic targets by isolating the earliest-affected factors. We present the largest prodromal Huntington disease application of the univariate method Voxel-based Morphometry, and the first application of the multivariate method Source-based Morphometry, to respectively compare gray matter concentration and capture co-occurring gray matter concentration patterns in control and prodromal participants. Using structural MRI data from 1050 (831 prodromal, 219 control) participants, we characterize control-prodromal, whole-brain gray matter concentration differences at various prodromal stages. Our results provide evidence for: (1) Regional co-occurrence and differential patterns of decline across the prodrome, with parietal and occipital differences commonly co-occurring, and frontal and temporal differences being relatively independent from one another, (2) Fronto-striatal circuits being among the earliest and most consistently affected in the prodrome (3) Delayed degradation in some movement-related regions, with increasing subcortical and occipital differences with later progression, (4) An overall superior-to-inferior gradient of gray matter concentration reduction in frontal, parietal, and temporal lobes, (5) The appropriateness of Source-based Morphometry for studying the prodromal Huntington disease population, and its enhanced sensitivity to early prodromal and regionally-concurrent differences." @default.
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• W2522427082 date "2016-09-21" @default.
• W2522427082 modified "2023-10-18" @default.
• W2522427082 title "Patterns of Co-Occurring Gray Matter Concentration Loss across the Huntington Disease Prodrome" @default.
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• W2522427082 doi "https://doi.org/10.3389/fneur.2016.00147" @default.
• W2522427082 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5030293" @default.
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