Cortical microstructural changes in autosomal dominant Alzheimer’s disease

نویسندگان

چکیده

Abstract Background Autosomal dominant Alzheimer's Disease (ADAD) is an important area of study to understand the pathogenesis AD. Previous studies suggested that mutations in genes coding for amyloid precursor protein cause early deposition amyloid‐β peptide (Aβ), resulting amyloid‐induced inflammatory response and cortical microstructural changes during cognitively asymptomatic phase, several years before clinical onset. The aim this work was investigate ADAD population, using novel diffusion tensor imaging (DTI) metrics are correlated with specific neuropathology disruption minicolumns. Method A total 270 individuals from families known PSEN1, PSEN2, APP (168 mutation carriers 102 non‐carriers) Dominantly Inherited Alzheimer’s Network (DIAN) were included study. 3DT1 DTI scans at baseline used calculate grey matter fraction, thickness, mean diffusivity (MD), three measures, namely: angle between radial minicolumnar direction principal (AngleR); components perpendicular minicolumns (PerpPD), component parallel (ParlPD). multivariate General Linear model (GLM) cross‐sectional differences. Mutation carrier status added as a fixed factor, “sex” “age” covariates. Differences across spectrum evaluated box‐plots grouped by dementia rating (CDR) Figure 1. Result measures found non‐carriers. GLM results revealed significant main effect (p<0.05) well age ( p <0.001) sex <0.001). Between‐subjects effects PerpPD <0.0001), ParlPD MD <0.0001) significantly higher group. As expected, fraction <0.005) thickness <0.01) lower Conclusion In autosomal (inherited) disease, differences emerge expected diagnosis based on parental These findings support surrogate microstructure quality identification stages

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ژورنال

عنوان ژورنال: Alzheimers & Dementia

سال: 2021

ISSN: ['1552-5260', '1552-5279']

DOI: https://doi.org/10.1002/alz.056091