A harmonized longitudinal biomarkers and cognition database for assessing the natural history of preclinical Alzheimer's disease from young adulthood and for designing prevention trials

DiscussionThe harmonized database is an optimum resource to design AD prevention trials decades before symptomatic onset.
Source: Alzheimer's and Dementia: The Journal of the Alzheimer's Association - Category: Geriatrics Source Type: research

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DiscussionCorrelation patterns between tau burden and atrophy in the amyloid-β–negative group mimicking early Braak stages suggests that 18F-flortaucipir is sensitive to tau pathology in primary age-related tauopathy. Correlations of imaging measures with memory performance indicate that this pathology is associated with poorer cognition.
Source: Alzheimer's and Dementia: The Journal of the Alzheimer's Association - Category: Geriatrics Source Type: research
AbstractAlzheimer ’s disease (AD) is the most common neurodegenerative disease in elderly individuals. We conducted this study to examine whether alterations in the fractional amplitudes of low-frequency fluctuations (fALFF) in the AD spectrum were frequency-dependent and symptom-relevant. A total of 43 patients wi th subjective cognitive decline (SCD), 52 with amnestic mild cognitive impairment (aMCI), 44 with Alzheimer’s dementia (d-AD) and 55 well-matched controls participated in resting-state functional magnetic resonance imaging (rs-fMRI) scans. The amplitudes were measured using fALFF within the slow-4 (0...
Source: Brain Imaging and Behavior - Category: Neurology Source Type: research
Publication date: Available online 22 July 2019Source: NeuroImage: ClinicalAuthor(s): Leonie Beyer, Jonas Schnabel, Philipp Kazmierczak, Michael Ewers, Sonja Schönecker, Catharina Prix, Johanna Meyer-Wilmes, Marcus Unterrainer, Cihan Catak, Oliver Pogarell, Robert Perneczky, Nathalie L. Albert, Peter Bartenstein, Adrian Danek, Katharina Bürger, Johannes Levin, Axel Rominger, Matthias BrendelAbstractObjectivesMany predictive or influencing factors have emerged in investigations of the cognitive reserve model of patients with Alzheimer's disease (AD). For example, neuronal injury, which correlates with cognitive de...
Source: NeuroImage: Clinical - Category: Radiology Source Type: research
AbstractAs the worldwide population ages, the prevalence of Alzheimer's disease (AD) increases. However, the results of promising medications have been unsatisfactory. Chinese acupuncture has a long history of treating dementia, but lack of evidence from well-designed randomized controlled trials that validate its efficacy and safety, as well as its lack of clear underlying mechanisms, contribute to its limited application in clinical practice. In recent years, brain imaging technologies, such as functional magnetic resonance imaging and positron emission tomography, have been used to assess brain responses to acupuncture ...
Source: Chinese Journal of Integrative Medicine - Category: Internal Medicine Source Type: research
ConclusionsA reduction of the [18F]FDG dose down to 1  MBq/kg is possible when performing 20-min brain PET/MRI without modifying diagnostic performance and quantitative assessments. The advantage is a significant reduction in the patient effective dose, which is non-negligible in longitudinal follow-up studies and in research protocols involving healt hy volunteers.
Source: Molecular Imaging and Biology - Category: Molecular Biology Source Type: research
Conclusion: Textures of the hippocampus, precuneus and posterior cingulate cortex predicted conversion from MCI to Alzheimer disease at an earlier time point and with higher accuracy than hippocampal volume. PMID: 31228173 [PubMed - as supplied by publisher]
Source: Journal of Psychiatry and Neuroscience - Category: Psychiatry Tags: J Psychiatry Neurosci Source Type: research
The field of neurodegenerative dementias, particularly Alzheimer disease (AD), has been limited by challenges in accurate diagnosis, but has recently been potentially revolutionized by the development of imaging and cerebrospinal fluid (CSF) biomarkers. These biomarkers have influenced the diagnostic evaluation of symptomatic patients with cognitive impairment or dementia, particularly in dementia subspecialty practice. The primary biomarker modalities include magnetic resonance imaging (MRI), positron emission tomography (PET), and CSF.
Source: JAMA - Category: General Medicine Source Type: research
Authors: Li H, Habes M, Wolk DA, Fan Y, Alzheimer's Disease Neuroimaging Initiative and the Australian Imaging Biomarkers and Lifestyle Study of Aging Abstract INTRODUCTION: It is challenging at baseline to predict when and which individuals who meet criteria for mild cognitive impairment (MCI) will ultimately progress to Alzheimer's disease (AD) dementia. METHODS: A deep learning method is developed and validated based on magnetic resonance imaging scans of 2146 subjects (803 for training and 1343 for validation) to predict MCI subjects' progression to AD dementia in a time-to-event analysis setting. RESUL...
Source: The Journal of Alzheimers Association - Category: Psychiatry Tags: Alzheimers Dement Source Type: research
Publication date: Available online 11 June 2019Source: Alzheimer's &DementiaAuthor(s): Hongming Li, Mohamad Habes, David A. Wolk, Yong Fan, Alzheimer's Disease Neuroimaging Initiative and the Australian Imaging Biomarkers and Lifestyle Study of AgingAbstractIntroductionIt is challenging at baseline to predict when and which individuals who meet criteria for mild cognitive impairment (MCI) will ultimately progress to Alzheimer's disease (AD) dementia.MethodsA deep learning method is developed and validated based on magnetic resonance imaging scans of 2146 subjects (803 for training and 1343 for validation) to predict MC...
Source: Alzheimer's and Dementia: The Journal of the Alzheimer's Association - Category: Geriatrics Source Type: research
Sensors, Vol. 19, Pages 2645: Transfer Learning Assisted Classification and Detection of Alzheimer’s Disease Stages Using 3D MRI Scans Sensors doi: 10.3390/s19112645 Authors: Maqsood Nazir Khan Aadil Jamal Mehmood Song Alzheimer’s disease effects human brain cells and results in dementia. The gradual deterioration of the brain cells results in disability of performing daily routine tasks. The treatment for this disease is still not mature enough. However, its early diagnosis may allow restraining the spread of disease. For early detection of Alzheimer’s through brain Mag...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
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