Utility of perfusion PET measures to assess neuronal injury in Alzheimer’s disease

Nelly Joseph-Mathurin, Yi Su, Tyler M. Blazey, Mateusz Jasielec, Andrei Vlassenko, Karl Friedrichsen, Brian A. Gordon, Russ C. Hornbeck, Lisa Cash, Beau M. Ances, Thomas Veale, David M. Cash, Adam M. Brickman, Virginia Buckles, Nigel J. Cairns, Carlos Cruchaga, Alison Goate, Clifford R. Jack, Celeste Karch, William Klunk, Robert A. Koeppe, Daniel S. Marcus, Richard Mayeux, Eric McDade, James M. Noble, John Ringman, Andrew J. Saykin, Paul M. Thompson, Chengjie Xiong, John C. Morris, Randall J. Bateman and Tammie L.S. Benzinger. Alzheimer’s and Dementia: Diagnosis, Assessment and Disease Monitoring, Volume 10, 1 January 2018, Pages 669-677 Read More

Abstract

Introduction: 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) is commonly used to estimate neuronal injury in Alzheimer’s disease (AD). Here, we evaluate the utility of dynamic PET measures of perfusion using 11C-Pittsburgh compound B (PiB) to estimate neuronal injury in comparison to FDG PET. Methods: FDG, early frames of PiB images, and relative PiB delivery rate constants (PiB-R1) were obtained from 110 participants from the Dominantly Inherited Alzheimer Network. Voxelwise, regional cross-sectional, and longitudinal analyses were done to evaluate the correlation between images and estimate the relationship of the imaging biomarkers with estimated time to disease progression based on family history. Results: Metabolism and perfusion images were spatially correlated. Regional PiB-R1 values and FDG, but not early frames of PiB images, significantly decreased in the mutation carriers with estimated year to onset and with increasing dementia severity. Discussion: Hypometabolism estimated by PiB-R1 may provide a measure of brain perfusion without increasing radiation exposure. © 2018 The Authors

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Posted on November 12, 2018
Posted in: Axon Injury & Repair, HPAN, Neurodegeneration, Neurogenetics & Transcriptomics, Publications Authors: , , , , , ,