Striatal Volume and Age in Prodromal Huntington Disease
Author Information
Author(s): Aylward Elizabeth, Mills James, Liu Dawei, Nopoulos Peggy, Ross Christopher A., Pierson Ronald, Paulsen Jane S.
Primary Institution: Center for Integrative Brain Research, Seattle Children's Research Institute
Hypothesis
Is there an association between age and striatal volume in individuals with different CAG repeat lengths in prodromal Huntington disease?
Conclusion
The study suggests that striatal atrophy may progress faster with higher CAG repeat lengths in prodromal Huntington disease.
Supporting Evidence
- Longer CAG repeat lengths are associated with faster clinical progression in Huntington disease.
- Striatal volume was plotted against age for different CAG repeat length groups.
- Regression analyses showed that slopes for age and striatal volume were steeper with increasing CAG repeat lengths.
Takeaway
This study looked at how the size of a part of the brain changes as people get older, especially in those at risk for Huntington disease. It found that those with longer gene repeats tend to lose brain volume faster.
Methodology
MRI scans were used to measure striatal volumes in 720 individuals with prodromal Huntington disease, and linear regression analyses were performed to examine the association between age and striatal volume across different CAG repeat length groups.
Potential Biases
Potential bias due to the exclusion of younger participants and those with very high CAG repeat lengths.
Limitations
The study is cross-sectional and lacks very young participants, which may skew the data.
Participant Demographics
Participants included 720 individuals with prodromal Huntington disease and 206 controls, with a mean age of 43.8 years for controls and varying mean ages for prodromal groups based on CAG repeat length.
Statistical Information
P-Value
<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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