Age and the association of dementia-related pathology with trajectories of cognitive decline

Willemijn J. Jansen*, Robert S. Wilson, Pieter Jelle Visser, Sukriti Nag, Julie A. Schneider, Bryan D. James, Sue E. Leurgans, Ana W. Capuano, David A. Bennett, Patricia A. Boyle

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Web of Science)

Abstract

The association of dementia-related pathologies with cognition is hypothesized to decrease as age advances. We examined this in 413 persons without cognitive impairment at baseline who completed annual cognitive evaluations during a mean of 10.4 years. After death, neuropathologic examinations quantified beta amyloid plaque load, neurofibrillary tangles, and transactive response DNA-binding protein 43 pathology, and identified Lewy bodies, hippocampal sclerosis, and gross and microscopic cerebral infarcts. We tested whether age at death modified associations of these neuropathologies with the nonlinear trajectory of cognitive decline using mixed-effects change point models. The rate of global cognitive decline was gradual at first and then increased approximately 10-fold in the last 3 years of life. After adjustment for all other pathologic indices, tangle density, gross infarcts, Lewy bodies, and transactive response DNA-binding protein 43 were associated with global cognitive decline. However, the deleterious association of dementia-related pathologies with cognitive decline did not systematically vary by age. This suggests that the neuropathologic mechanisms underlying late-life cognitive decline do not substantially differ across the spectrum of age. (C) 2017 Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)138-145
Number of pages8
JournalNeurobiology of Aging
Volume61
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Neuropathologies
  • Aging
  • Dementia
  • Cognitive decline
  • Mixed-effects change point model
  • ALZHEIMER-DISEASE
  • OLDER PERSONS
  • TDP-43 PATHOLOGY
  • IMPAIRMENT
  • NEUROPATHOLOGY
  • ABILITIES
  • DIAGNOSIS
  • Aging/metabolism
  • Humans
  • Male
  • Cognition
  • DNA-Binding Proteins/metabolism
  • Dementia/metabolism
  • Aged, 80 and over
  • Female
  • Aged
  • Lewy Bodies/pathology
  • Neurofibrillary Tangles/pathology
  • Amyloid beta-Peptides/metabolism

Cite this