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Voxel-based morphometry in tau-positive and tau-negative frontotemporal lobar degenerations
Jennifer L Whitwell1, Jason D Warren, Keith A Josephs
1Dementia Research Centre, Institute of Neurology, London, UK.
Neuro-Degenerative Diseases
|August 16, 2006
Summary
Frontotemporal atrophy patterns do not predict tau protein presence in frontotemporal lobar degenerations (FTLD). Brain imaging did not reveal specific features distinguishing tau-positive from tau-negative FTLD subgroups.
Area of Science:
- Neuroscience
- Neuropathology
- Radiology
Background:
- Identifying predictors of protein dysfunction in frontotemporal lobar degenerations (FTLD) is crucial.
- Establishing correlations between regional brain tissue loss and specific proteinopathies in FTLD remains a challenge.
Purpose of the Study:
- To investigate specific brain imaging correlates of tau protein dysfunction in FTLD.
- To compare tau-positive and tau-negative FTLD subgroups using voxel-based morphometry.
Main Methods:
- Retrospective analysis of volumetric brain MRI data from 17 FTLD patients.
- Subgrouping patients into tau-positive (n=9) and tau-negative (n=8) based on pathological or genetic confirmation.
- Voxel-based morphometry comparing FTLD subgroups with healthy controls using statistical parametric mapping.
Main Results:
- Both tau-positive and tau-negative FTLD subgroups exhibited widespread atrophy in frontal and anterior temporal lobes compared to controls.
- No distinct brain imaging features were identified to differentiate between the tau-positive and tau-negative FTLD subgroups.
- Common patterns of regional brain atrophy were observed despite differing tau pathology.
Conclusions:
- Regional patterns of frontotemporal atrophy do not reliably predict the presence or absence of tau pathology in FTLD.
- Distinct immunohistochemical profiles in FTLD can be associated with similar patterns of regional neuronal loss.
- Current imaging methods do not distinguish between tau-positive and tau-negative FTLD based on atrophy patterns.
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