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Title: Relationship between memory performance and β-amyloid deposition at different stages of Alzheimer's disease.
Austin Authors: Chételat, Gaël;Villemagne, Victor L ;Pike, Kerryn E;Ellis, Kathryn A;Ames, David;Masters, Colin L ;Rowe, Christopher C 
Institutional Author: Australian Imaging Biomarkers and Lifestyle Study of Ageing Research Group
Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, Victoria, Australia
Issue Date: 1-Feb-2012
Publication information: Neuro-degenerative Diseases 2012; 10(1-4): 141-4
Abstract: Postmortem studies have suggested that β-amyloid (Aβ) deposition was only weakly related to the degree of cognitive impairment in Alzheimer's disease (AD). The development of Aβ ligands for in vivo PET imaging has greatly facilitated the assessment of this question.The objective of the present study was to provide an overview of our current knowledge regarding the relationship between Aβ deposition and episodic memory deficits in nondemented elderly and in patients with mild cognitive impairment or AD.Information was obtained both from studies comparing memory performance in individuals with high Pittsburgh compound B (PiB) and those with low PiB and from studies performing correlation analyses between memory performance and PiB retention considered as a continuous variable.Previous studies assessing the relationship between memory and global neocortical PiB reported conflicting findings, and overall suggest that this link is weak, probably indirect, and detectable only in early stages. Assessing the relationship with regional instead of global neocortical PiB, we found a specific relationship between episodic memory deficits and neocortical temporal PiB, independent from hippocampal atrophy, in the predementia stage of the disease.There is a relationship between regional Aβ deposition and episodic memory deficits in the presymptomatic stage of AD.
DOI: 10.1159/000334295
Journal: Neuro-degenerative diseases
Type: Journal Article
Subjects: Alzheimer Disease.complications.metabolism.pathology.radionuclide imaging
Amyloid beta-Peptides.metabolism
Aniline Compounds.diagnostic use
Atrophy.pathology.radionuclide imaging
Brain.metabolism.radionuclide imaging
Magnetic Resonance Imaging
Memory Disorders.etiology.radionuclide imaging
Positron-Emission Tomography
Thiazoles.diagnostic use
Appears in Collections:Journal articles

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