Beta amyloid deposition maps onto hippocampal and subiculum atrophy in dementia with Lewy bodies

Neurobiol Aging. 2019 Jan;73:74-81. doi: 10.1016/j.neurobiolaging.2018.09.004. Epub 2018 Sep 12.


Although dementia with Lewy bodies (DLB) is a synucleinopathy, it is frequently accompanied by beta amyloid (Aβ) accumulation. Elucidating the relationships of Aβ with gray matter atrophy in DLB may yield insights regarding the contributions of comorbid Alzheimer's disease to its disease progression. Twenty healthy controls and 25 DLB subjects underwent clinical assessment, [18F]-Florbetapir, and 3T magnetic resonance imaging. FreeSurfer was used to estimate cortical thickness and subcortical volumes, and PetSurfer was used to quantify [18F]-Florbetapir standardized uptake value ratio. Principal component analysis was used to identify the dominant Aβ component for correlations with regional cortical thickness, hippocampal subfields, and subcortical structures. Relative to healthy controls, the DLB group demonstrated increased Aβ in widespread regions encompassing the frontal and temporoparietal cortices, whereas cortical thinning was restricted to the temporal lobe. Among DLB subjects, the Aβ component was significantly associated with more severe hippocampal and subiculum atrophy. These findings may reflect an early process of superimposed AD-like atrophy in DLB, thereby conferring support for the therapeutic potential of anti-Aβ interventions in people with DLB.

Keywords: Alzheimer's disease; Amyloid; Dementia with Lewy bodies; MRI; PET.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Alzheimer Disease / etiology
  • Amyloid beta-Peptides / metabolism*
  • Atrophy
  • Disease Progression
  • Female
  • Hippocampus / diagnostic imaging
  • Hippocampus / metabolism*
  • Hippocampus / pathology*
  • Humans
  • Lewy Body Disease / complications
  • Lewy Body Disease / diagnostic imaging
  • Lewy Body Disease / metabolism*
  • Lewy Body Disease / pathology*
  • Magnetic Resonance Imaging
  • Male
  • Middle Aged
  • Positron-Emission Tomography


  • Amyloid beta-Peptides