Influence of Comorbidity of Cerebrovascular Disease and Amyloid-β on Alzheimer's Disease.

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ID: 84187
2019
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Abstract
Quantifying the contribution of cerebrovascular disease to the clinical and pathological profile of Alzheimer's disease is challenging.We aimed to determine the influence of cerebrovascular disease, amyloid-β (Aβ), and their comorbidity on cognitive decline, hippocampal atrophy, and Aβ deposition, by evaluating data from the Australian Imaging, Biomarker and Lifestyle Study of Ageing.Two-hundred and eighteen participants underwent Aβ PET, MRI, and cognitive assessment at 18-month intervals for up to 90 months. Aβ status was determined on baseline PET. Participants were also classified as V + on baseline MRI if they had≥1 large cortical infarcts, subcortical infarcts, or cortical cerebral microinfarcts; or white matter hyperintensity volume greater than the 90th percentile of healthy controls. Linear mixed models were conducted comparing slopes of change in cognition, hippocampal volume, and Aβ load between the four resultant groups.Mean age at baseline was 74 years (range 59-96). One-hundred and fifteen participants were cognitively normal, 54 had mild cognitive impairment, and 49 had Alzheimer's disease. Compared to the Aβ-/V- group, the Aβ+/V- and Aβ+/V+groups showed significantly faster cognitive decline and hippocampal atrophy over 90 months. V + status was associated with greater cognitive decline (Cohen's d = 0.85, p < 0.001) and hippocampal atrophy (d = 2.05, p < 0.001) in the Aβ+group but not in the Aβ- group. V + status was not associated with Aβ accumulation in any group.Comorbidity of cerebrovascular disease and Aβ was associated with cognitive decline and neurodegeneration. Cerebrovascular disease was not associated with the rate of Aβ accumulation.
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yassi2019influencejournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yassi, Nawaf;Hilal, Saima;Xia, Ying;Lim, Yen Ying;Watson, Rosie;Kuijf, Hugo;Fowler, Christopher;Yates, Paul;Maruff, Paul;Martins, Ralph;Ames, David;Chen, Christopher;Rowe, Christopher;Villemagne, Victor;Salvado, Olivier;Desmond, Patricia M;Masters, Colin L;
Journal Journal of Alzheimer's disease : JAD
Year 2019
DOI
10.3233/JAD-191028
URL
Keywords
mild cognitive impairment Magnetic resonance imaging stroke positron emission tomography cerebrovascular disease alzheimer’s disease

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