Keyword search (3,619 papers available)


Recommendations of the 5th Canadian Consensus Conference on the diagnosis and treatment of dementia.

Author(s): Ismail Z, Black SE, Camicioli R, Chertkow H, Herrmann N, Laforce R, Montero-Odasso M, Rockwood K, Rosa-Neto P, Seitz D, Sivananthan S, Smith...

Alzheimers Dement. 2020 Jul 29;: Authors: Ismail Z, Black SE, Camicioli R, Chertkow H, Herrmann N, Laforce R, Montero-Odasso M, Rockwood K, Rosa-Neto P, Seitz D, Sivananthan S, Smith EE, Soucy JP,...

Article GUID: 32725777
Topographical distribution of Aβ predicts progression to dementia in Aβ positive mild cognitive impairment

Author(s): Pascoal TA, Therriault J, Mathotaarachchi S, Kang MS, Shin M, Benedet AL, Chamoun M, Tissot C, Lussier F, Mohaddes S, Soucy JP, Massarweh G,...

INTRODUCTION: Abnormal brain amyloid beta (Aβ) is typically assessed in vivo using global concentrations from cerebrospinal fluid and positron emission tomography (PET). However, it is unknown...

Article GUID: 32582834
Non-invasive in vivo hyperspectral imaging of the retina for potential biomarker use in Alzheimer's disease.

Author(s): Hadoux X, Hui F, Lim JKH, Masters CL, Pébay A, Chevalier S, Ha J, Loi S, Fowler CJ, Rowe C, Villemagne VL, Taylor EN, Fluke C, Soucy JP, Les...

Nat Commun. 2019 Sep 17;10(1):4227 Authors: Hadoux X, Hui F, Lim JKH, Masters CL, Pébay A, Chevalier S, Ha J, Loi S, Fowler CJ, Rowe C, Villemagne VL, Taylor EN, Fluke C, Soucy JP, Lesage F, ...

Article GUID: 31530809
The Comprehensive Assessment of Neurodegeneration and Dementia: Canadian Cohort Study.

Author(s): Chertkow H, Borrie M, Whitehead V, Black SE, Feldman HH, Gauthier S, Hogan DB, Masellis M, McGilton K, Rockwood K, Tierney MC, Andrew M, Hsi...

Can J Neurol Sci. 2019 Jul 16;:1-13 Authors: Chertkow H, Borrie M, Whitehead V, Black SE, Feldman HH, Gauthier S, Hogan DB, Masellis M, McGilton K, Rockwood K, Tierney MC, Andrew M, Hsiung GR, Cam...

Article GUID: 31309917
Brain perfusion during rapid-eye-movement sleep successfully identifies amnestic mild cognitive impairment.

Author(s): Brayet P, Petit D, Baril AA, Gosselin N, Gagnon JF, Soucy JP, Gauthier S, Kergoat MJ, Carrier J, Rouleau I, Montplaisir J

Sleep Med. 2017 Jun;34:134-140 Authors: Brayet P, Petit D, Baril AA, Gosselin N, Gagnon JF, Soucy JP, Gauthier S, Kergoat MJ, Carrier J, Rouleau I, Montplaisir J

Article GUID: 28522082
Quantification of brain cholinergic denervation in Alzheimer's disease using PET imaging with [18F]-FEOBV.

Author(s): Aghourian M, Legault-Denis C, Soucy JP, Rosa-Neto P, Gauthier S, Kostikov A, Gravel P, Bédard MA

Mol Psychiatry. 2017 11;22(11):1531-1538 Authors: Aghourian M, Legault-Denis C, Soucy JP, Rosa-Neto P, Gauthier S, Kostikov A, Gravel P, Bédard MA

Article GUID: 28894304
Amyloid and tau signatures of brain metabolic decline in preclinical Alzheimer's disease.

Author(s): Pascoal TA, Mathotaarachchi S, Shin M, Park AY, Mohades S, Benedet AL, Kang MS, Massarweh G, Soucy JP, Gauthier S, Rosa-Neto P, Alzheimer’s ...

Eur J Nucl Med Mol Imaging. 2018 06;45(6):1021-1030 Authors: Pascoal TA, Mathotaarachchi S, Shin M, Park AY, Mohades S, Benedet AL, Kang MS, Massarweh G, Soucy JP, Gauthier S, Rosa-Neto P, Alzheim...

Article GUID: 29396637
Title:Amyloid and tau signatures of brain metabolic decline in preclinical Alzheimer's disease.
Authors:Pascoal TA,  Mathotaarachchi S,  Shin M,  Park AY,  Mohades S,  Benedet AL,  Kang MS,  Massarweh G,  Soucy JP,  Gauthier S,  Rosa-Neto P,  Alzheimer’s Disease Neuroimaging Initiative
Link:https://www.ncbi.nlm.nih.gov/pubmed/29396637?dopt=Abstract
DOI:10.1007/s00259-018-3933-3
Category:Eur J Nucl Med Mol Imaging
PMID:29396637
Dept Affiliation: PERFORM
1 Translational Neuroimaging Laboratory, The McGill University Research Centre for Studies in Aging, Douglas Hospital, McGill University, 6875 La Salle Blvd - FBC room 3149, Montreal, QC, H4H 1R3, Canada.
2 Statistical Laboratory, University of Cambridge, Cambridge, UK.
3 Montreal Neurological Institute, Montreal, Canada.
4 PERFORM Centre, Concordia University, Montreal, Canada.
5 Alzheimer's Disease Research Unit, The McGill University Research Centre for Studies in Aging, Douglas Hospital, McGill University, Montreal, Canada.
6 Translational Neuroimaging Laboratory, The McGill University Research Centre for Studies in Aging, Douglas Hospital, McGill University, 6875 La Salle Blvd - FBC room 3149, Montreal, QC, H4H 1R3, Canada. pedro.rosa@mcgill.ca.
7 Montreal Neurological Institute, Montreal, Canada. pedro.rosa@mcgill.ca.
8 Alzheimer's Disease Research Unit, The McGill University Research Centre for Studies in Aging, Douglas Hospital, McGill University, Montreal, Canada. pedro.rosa@mcgill.ca.
9 Department of Neurology and Neurosurgery, McGill University, Montreal, Canada. pedro.rosa@mcgill.ca.

Description:

Amyloid and tau signatures of brain metabolic decline in preclinical Alzheimer's disease.

Eur J Nucl Med Mol Imaging. 2018 06;45(6):1021-1030

Authors: Pascoal TA, Mathotaarachchi S, Shin M, Park AY, Mohades S, Benedet AL, Kang MS, Massarweh G, Soucy JP, Gauthier S, Rosa-Neto P, Alzheimer’s Disease Neuroimaging Initiative

Abstract

PURPOSE: We aimed to determine the amyloid (Aß) and tau biomarker levels associated with imminent Alzheimer's disease (AD) - related metabolic decline in cognitively normal individuals.

METHODS: A threshold analysis was performed in 120 cognitively normal elderly individuals by modelling 2-year declines in brain glucose metabolism measured with [18F]fluorodeoxyglucose ([18F]FDG) as a function of [18F]florbetapir Aß positron emission tomography (PET) and cerebrospinal fluid phosphorylated tau biomarker thresholds. Additionally, using a novel voxel-wise analytical framework, we determined the sample sizes needed to test an estimated 25% drugeffect with 80% of power on changes in FDG uptake over 2 years at every brain voxel.

RESULTS: The combination of [18F]florbetapir standardized uptake value ratios and phosphorylated-tau levels more than one standard deviation higher than their respective thresholds for biomarker abnormality was the best predictor of metabolic decline in individuals with preclinical AD. We also found that a clinical trial using these thresholds would require as few as 100 individuals to test a 25% drug effect on AD-related metabolic decline over 2 years.

CONCLUSIONS: These results highlight the new concept that combined Aß and tau thresholds can predict imminent neurodegeneration as an alternative framework with a high statistical power for testing the effect of disease-modifying therapies on [18F]FDG uptake decline over a typical 2-year clinical trial period in individuals with preclinical AD.

PMID: 29396637 [PubMed - indexed for MEDLINE]