1. Medial temporal lobe atrophy patterns in early-versus late-onset amnestic Alzheimer's disease.
- Author
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Wuestefeld, Anika, Pichet Binette, Alexa, van Westen, Danielle, Strandberg, Olof, Stomrud, Erik, Mattsson-Carlgren, Niklas, Janelidze, Shorena, Smith, Ruben, Palmqvist, Sebastian, Baumeister, Hannah, Berron, David, Yushkevich, Paul A., Hansson, Oskar, Spotorno, Nicola, and Wisse, Laura E.M.
- Abstract
Background: The medial temporal lobe (MTL) is hypothesized to be relatively spared in early-onset Alzheimer's disease (EOAD). Yet, detailed examination of MTL subfields and drivers of atrophy in amnestic EOAD is lacking. Methods: BioFINDER-2 participants with memory impairment, abnormal amyloid-β and tau-PET were included. Forty-one amnestic EOAD individuals ≤65 years and, as comparison, late-onset AD (aLOAD, ≥70 years, n = 154) and amyloid-β-negative cognitively unimpaired controls were included. MTL subregions and biomarkers of (co-)pathologies were measured. Results: AD groups showed smaller MTL subregions compared to controls. Atrophy patterns were similar across AD groups: aLOAD showed thinner entorhinal cortices than aEOAD; aEOAD showed thinner parietal regions than aLOAD. aEOAD showed lower white matter hyperintensities than aLOAD. No differences in MTL tau-PET or transactive response DNA binding protein 43-proxy positivity were found. Conclusions: We found evidence for MTL atrophy in amnestic EOAD and overall similar levels to aLOAD of MTL tau pathology and co-pathologies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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