Abstract
Purpose
Huntington’s disease (HD) is a fatal neurodegenerative disorder with no effective treatment currently available. Although the pathological hallmark of HD is massive striatal atrophy, it has been suggested that cortical deterioration may concomitantly occur and play a major role in the patient’s functional independence. Our objective was to characterize cortical structural and metabolic neurodegeneration in the transition from premanifest to early-stage Huntington’s disease (HD).
Methods
Using a surface-based neuroimaging approach, we compared cortical thickness and intracortical FDG-PET uptake in 19 early-symptomatic HD patients with respect to 21 premanifest HD individuals.
Results
Early-HD patients showed significant cortical atrophy and intracortical hypometabolism when compared to premanifest subjects (p < 0.05, corrected for multiple comparisons). However, whereas the atrophy pattern was restricted to precentral and parieto-occipital regions, a pronounced frontotemporal hypometabolism was observed. Importantly, structural changes correlated with motor and cognitive performance, and metabolic changes were associated with the presence and severity of apathy in this population, a core neuropsychiatric feature of this disorder.
Conclusion
Our findings reveal an asynchronous neuronal loss and metabolic compromise across the cerebral cortex in early HD. Hence, the use of structural and metabolic imaging indicators to characterize disease progression in this population should take into consideration the dissociation which occurs between cortical atrophy and hypometabolism.
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Acknowledgements
The authors wish to thank all those at the Hospital de la Santa Creu i Sant Pau involved in the study. The authors also wish to thank the study participants and their families.
Funding
This study was partially funded by a Spanish Government Grant (PI17/001885).
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Author Frederic Sampedro declares that he has no conflict of interest. Author Saul Martínez-Horta declares that he has no conflict of interest. Author Jesus Perez-Perez declares that he has no conflict of interest. Author Andrea Horta-Barba declares that she has no conflict of interest. Author Diego-Alfonso Lopez-Mora declares that he has no conflict of interest. Author Valle Camacho declares that she has no conflict of interest. Author Alejandro Fernandez-Leon declares that he has no conflict of interest. Author Beatriz Gomez-Anson declares that she has no conflict of interest. Author Ignasi Carrió declares that he has no conflict of interest. Author Jaime Kulisevsky declares that he has no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Sampedro, F., Martínez-Horta, S., Perez-Perez, J. et al. Cortical atrophic-hypometabolic dissociation in the transition from premanifest to early-stage Huntington’s disease. Eur J Nucl Med Mol Imaging 46, 1111–1116 (2019). https://doi.org/10.1007/s00259-018-4257-z
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DOI: https://doi.org/10.1007/s00259-018-4257-z