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Sökning: WFRF:(Leuzy Antoine) > (2017)

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  • Rodriguez-Vieitez, Elena, et al. (författare)
  • Comparability of [F-18]THK5317 and [C-11]PIB blood flow proxy images with [F-18]FDG positron emission tomography in Alzheimer's disease
  • 2017
  • Ingår i: Journal of Cerebral Blood Flow and Metabolism. - : SAGE PUBLICATIONS INC. - 0271-678X .- 1559-7016. ; 37:2, s. 740-749
  • Tidskriftsartikel (refereegranskat)abstract
    • For amyloid positron emission tomography tracers, the simplified reference tissue model derived ratio of influx rate in target relative to reference region (R-1) has been shown to serve as a marker of brain perfusion, and, due to the strong coupling between perfusion and metabolism, as a proxy for glucose metabolism. In the present study, 11 prodromal Alzheimer's disease and nine Alzheimer's disease dementia patients underwent [F-18]THK5317, carbon-11 Pittsburgh Compound-B ([C-11]PIB), and 2-deoxy-2-[F-18]fluoro-D-glucose ([F-18]FDG) positron emission tomography to assess the possible use of early-phase [F-18]THK5317 and R-1 as proxies for brain perfusion, and thus, for glucose metabolism. Discriminative performance (prodromal vs Alzheimer's disease dementia) of [F-18]THK5317 (early-phase SUVr and R-1) was compared with that of [C-11]PIB (early-phase SUVr and R-1) and [F-18]FDG. Strong positive correlations were found between [F-18]THK5317 (early-phase, R-1) and [F-18]FDG, particularly in frontal and temporoparietal regions. Differences in correlations between early-phase and R-1 ([F-18]THK5317 and [C-11]PIB) and [F-18]FDG, were not statistically significant, nor were differences in area under the curve values in the discriminative analysis. Our findings suggest that early-phase [F-18]THK5317 and R-1 provide information on brain perfusion, closely related to glucose metabolism. As such, a single positron emission tomography study with [F-18]THK5317 may provide information about both tau pathology and brain perfusion in Alzheimer's disease, with potential clinical applications.
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