Fibrillar amyloid correlates of preclinical cognitive decline

Cynthia M. Stonnington, Kewei Chen, Wendy Lee, Dona E.C. Locke, Amylou C. Dueck, Xiaofen Liu, Auttawut Roontiva, Adam S. Fleisher, Richard J. Caselli, Eric M. Reiman

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Background: It is not known whether preclinical cognitive decline is associated with fibrillar β-amyloid (Aβ) deposition irrespective of apolipoprotein E (APOE) ε4 status. Methods: From a prospective observational study of 623 cognitively normal individuals, we identified all subjects who showed preclinical decline of at least 2 standard deviations beyond the decline of the entire group in memory or executive function. Fourteen decliners were matched by APOE ε4 gene dose, age, sex, and education with 14 nondecliners. Dynamic Pittsburgh compound B (PiB) positron emission tomography (PET) scans, the Logan method, statistical parametric mapping, and automatically labeled regions of interest were used to characterize and compare cerebral-to-cerebellar PiB distribution volume ratios (DVRs), reflecting fibrillar Aβ burden. Results: At P <.005 (uncorrected), decliners had significantly greater DVRs in comparison to nondecliners. Conclusions: Asymptomatic longitudinal neuropsychological decline is associated with subsequent increased fibrillar amyloid deposition, even when controlling for APOE ε4 genotype.

Original languageEnglish (US)
Pages (from-to)e1-e8
JournalAlzheimer's and Dementia
Volume10
Issue number1
DOIs
StatePublished - Jan 2014

Keywords

  • Alzheimer's disease
  • Amyloid imaging
  • Apolipoprotein E
  • Cognitive decline
  • Preclinical

ASJC Scopus subject areas

  • Epidemiology
  • Health Policy
  • Developmental Neuroscience
  • Clinical Neurology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health
  • Cellular and Molecular Neuroscience

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