Cortical laminar binding of PET amyloid and tau tracers in Alzheimer disease Academic Article Article uri icon

Overview

MeSH Major

  • Alzheimer Disease
  • Leuprolide

abstract

  • COPYRIGHT © 2015 by the Society of Nuclear Medicine and Molecular Imaging, Inc. Neurofibrillary tau pathology and amyloid β (Aβ) plaques, characteristic lesions of Alzheimer disease (AD), show different neocortical laminar distributions. Neurofibrillary-tangle tau pathology tends to be closer to the gray matter-white matter boundary, whereas Aβ is dispersed throughout the width of the cortical ribbon. Methods: Using PET radiotracers for tau and Aβ lesions, we developed an image analysis tool to measure the distance of tracer-positive voxels from the gray matter-white matter boundary. We studied 5 AD and 5 healthy subjects with both 18F-THK5117 (tau) and 11C-Pittsburgh compound B (Aβ) PET. Results: On average, tau-positive voxels were closer to the white matter than were Aβ-positive voxels. This effect was found for all AD subjects and for all regions, both before and after regionally adjusting for the nonspecific white matter binding of both tracers. The differential laminar pattern was validated through postmortem examination. Conclusion: Within cortical lamina, distance measures may be of value in testing PET tracers for their anatomic selectivity.

publication date

  • January 2015

Research

keywords

  • Academic Article

Identity

Digital Object Identifier (DOI)

  • 10.2967/jnumed.114.149229

PubMed ID

  • 25572087

Additional Document Info

start page

  • 270

end page

  • 273

volume

  • 56

number

  • 2