Please use this identifier to cite or link to this item: https://repositorio.uca.edu.ar/handle/123456789/10116
Título : White matter fiber density abnormalities in cognitively normal adults at risk for lateonset Alzheimer´s disease
Autor : Sánchez, Stella M. 
Duarte-Abritta, Bárbara 
Abulafia, Carolina Andrea 
De Pino, Gabriela 
Bocaccio, Hernan 
Castro, Mariana N. 
Sevlever, Gustavo 
Fonzo, Greg A. 
Nemeroff, Charles B. 
Gustafson, Deborah R. 
Guinjoan, Salvador M. 
Villarreal, Mirta F. 
Palabras clave : ENFERMEDAD DE ALZHEIMERENFERMEDADES NEURODEGENERATIVASPREVENCION Y CONTROLDIAGNOSTICOTRATAMIENTO MEDICORESONANCIA MAGNETICA NUCLEARFUNCION COGNITIVAEVALUACION NEUROPSICOLOGICA
Fecha de publicación : 2019
Editorial : Elsevier
Cita : Sánchez, S. M., et al. White matter fiber density abnormalities in cognitively normal adults at risk for lateonset Alzheimer´s disease [en línea]. Journal of Psychiatric Research. 2019, 122. doi:10.1016/j.jpsychires.2019.12.019. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/10116
Resumen : Abstract: Tau accumulation affecting white matter tracts is an early neuropathological feature of late-onset Alzheimer’s disease (LOAD). There is a need to ascertain methods for the detection of early LOAD features to help with disease prevention efforts. The microstructure of these tracts and anatomical brain connectivity can be assessed by analyzing diffusion MRI (dMRI) data. Considering that family history increases the risk of developing LOAD, we explored the microstructure of white matter through dMRI in 23 cognitively normal adults who are offspring of patients with Late-Onset Alzheimer’s Disease (O-LOAD) and 22 control subjects (CS) without family history of AD. We also evaluated the relation of white matter microstructure metrics with cortical thickness, volumetry, in vivo amyloid deposition (with the help of PiB positron emission tomography -PiB-PET) and regional brain metabolism (as FDG-PET) measures. Finally we studied the association between cognitive performance and white matter microstructure metrics. O-LOAD exhibited lower fiber density and fractional anisotropy in the posterior portion of the corpus callosum and right fornix when compared to CS. Among O-LOAD, reduced fiber density was associated with lower amyloid deposition in the right hippocampus, and greater cortical thickness in the left precuneus, while higher mean diffusivity was related with greater cortical thickness of the right superior temporal gyrus. Additionally, compromised white matter microstructure was associated with poorer semantic fluency. In conclusion, white matter microstructure metrics may reveal early differences in O-LOAD by virtue of parental history of the disorder, when compared to CS without a family history of LOAD. We demonstrate that these differences are associated with lower fiber density in the posterior portion of the corpus callosum and the right fornix.
URI : https://repositorio.uca.edu.ar/handle/123456789/10116
ISSN : 0022-3956 (online)
Disciplina: MEDICINA
DOI: 10.1016/j.jpsychires.2019.12.019
Derechos: Acceso abierto. 12 meses de embargo
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