Brain Structural and Amyloid Correlates of Recovery From Semantic Interference in Cognitively Normal Individuals With or Without Family History of Late-Onset Alzheimer's Disease

J Neuropsychiatry Clin Neurosci. 2019 Winter;31(1):25-36. doi: 10.1176/appi.neuropsych.17120355. Epub 2018 Oct 11.

Abstract

Failure to recover from proactive semantic interference (frPSI) has been shown to be more sensitive than traditional cognitive measures in different populations with preclinical Alzheimer's disease. The authors sought to characterize the structural and amyloid in vivo correlates of frPSI in cognitively normal offspring of patients with late-onset Alzheimer's disease (O-LOAD), compared with individuals without a family history of neurodegenerative disorders (CS). The authors evaluated the LASSI-L, a test tapping frPSI and other types of semantic interference and delayed recall on the RAVLT, along with 3-T MRI volumetry and positron emission tomography Pittsburgh compound B, in 27 O-LOAD and 18 CS with equivalent age, sex, years of education, ethnicity, premorbid intelligence, and mood symptoms. Recovery from proactive semantic interference (frPSI) and RAVLT delayed recall were lower in O-LOAD cases. Structural correlates of both cognitive dimensions were different in CS and O-LOAD, involving brain regions concerned with autonomic, motor, and motivational control in the former, and regions traditionally implicated in Alzheimer's disease in the latter. Better recovery from retroactive semantic interference was associated with less amyloid load in the left temporal lobe in O-LOAD but not CS. In middle-aged cognitively normal individuals with one parent affected with LOAD, frPSI was impaired compared with persons without a family history of LOAD. The neuroimaging correlates of such cognitive measure in those with one parent with LOAD involve Alzheimer's-relevant brain regions even at a relatively young age.

Keywords: Alzheimer’s Disease; Cognitive Disorders; Imaging Techniques.

MeSH terms

  • Adult
  • Age of Onset
  • Alzheimer Disease* / diagnostic imaging
  • Alzheimer Disease* / metabolism
  • Alzheimer Disease* / pathology
  • Alzheimer Disease* / physiopathology
  • Amyloid beta-Peptides / metabolism*
  • Aniline Compounds
  • Brain* / diagnostic imaging
  • Brain* / metabolism
  • Brain* / pathology
  • Cognitive Dysfunction* / diagnostic imaging
  • Cognitive Dysfunction* / metabolism
  • Cognitive Dysfunction* / pathology
  • Cognitive Dysfunction* / physiopathology
  • Cross-Sectional Studies
  • Female
  • Genetic Predisposition to Disease*
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Mental Recall / physiology*
  • Positron-Emission Tomography
  • Thiazoles
  • Young Adult

Substances

  • 2-(4'-(methylamino)phenyl)-6-hydroxybenzothiazole
  • Amyloid beta-Peptides
  • Aniline Compounds
  • Thiazoles