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Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring

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https://www.readbyqxmd.com/read/29034310/further-education-improves-cognitive-reserve-and-triggers-improvement-in-selective-cognitive-functions-in-older-adults-the-tasmanian-healthy-brain-project
#1
Megan E Thow, Mathew J Summers, Nichole L Saunders, Jeffery J Summers, Karen Ritchie, James C Vickers
INTRODUCTION: The strong link between early-life education and subsequent reduced risk of dementia suggests that education in later life could enhance cognitive function and may reduce age-related cognitive decline and protect against dementia. METHODS: Episodic memory, working memory, executive function, and language processing performances were assessed annually over 4 years in 359 healthy older adults who attended university for a minimum of 12 months (intervention) and were compared against 100 healthy adult controls...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28983503/alzheimer-s-disease-genetic-risk-variants-beyond-apoe-%C3%AE%C2%B54-predict-mortality
#2
Jesse Mez, Jessica R Marden, Shubhabrata Mukherjee, Stefan Walter, Laura E Gibbons, Alden L Gross, Laura B Zahodne, Paola Gilsanz, Paul Brewster, Kwangsik Nho, Paul K Crane, Eric B Larson, M Maria Glymour
INTRODUCTION: We hypothesized that, like apolipoprotein E (APOE), other late-onset Alzheimer's disease (LOAD) genetic susceptibility loci predict mortality. METHODS: We used a weighted genetic risk score (GRS) from 21 non-APOE LOAD risk variants to predict survival in the Adult Changes in Thought and the Health and Retirement Studies. We meta-analyzed hazard ratios and examined models adjusted for cognitive performance or limited to participants with dementia. For replication, we assessed the GRS-longevity association in the Cohorts for Heart and Aging Research in Genomic Epidemiology, comparing cases surviving to age ≥90 years with controls who died between ages 55 and 80 years...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28975146/effect-of-apolipoprotein-e-phenotype-on-the-association-of-plasma-amyloid%C3%A2-%C3%AE-and-amyloid-positron-emission-tomography-imaging-in-japan
#3
Amane Tateno, Takeshi Sakayori, Woo Chan Kim, Michihiko Koeda, Shinichiro Kumita, Hidenori Suzuki, Yoshiro Okubo
INTRODUCTION: The plasma concentration of beta-amyloid (Aβ) has been considered another biomarker of Alzheimer's disease and was reportedly associated with cortical Aβ accumulation. METHODS: We analyzed 28 subjects with apolipoprotein E4 (ApoE4; E4 group) and 89 subjects without ApoE4 (non-E4 group) to determine the association between cortical Aβ accumulation by standard uptake value ratio with [(18)F]florbetapir positron emission tomography and plasma Aβ1-40 and Aβ1-42...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28971142/entorhinal-and-transentorhinal-atrophy-in-mild-cognitive-impairment-using-longitudinal-diffeomorphometry
#4
Daniel J Tward, Chelsea S Sicat, Timothy Brown, Arnold Bakker, Michela Gallagher, Marilyn Albert, Michael Miller
INTRODUCTION: Autopsy findings have shown the entorhinal cortex and transentorhinal cortex are among the earliest sites of accumulation of pathology in patients developing Alzheimer's disease. METHODS: Here, we study this region in subjects with mild cognitive impairment (n = 36) and in control subjects (n = 16). The cortical areas are manually segmented, and local volume and shape changes are quantified using diffeomorphometry, including a novel mapping procedure that reduces variability in anatomic definitions over time...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28951883/blood-based-metabolic-signatures-in-alzheimer-s-disease
#5
Francisca A de Leeuw, Carel F W Peeters, Maartje I Kester, Amy C Harms, Eduard A Struys, Thomas Hankemeier, Herman W T van Vlijmen, Sven J van der Lee, Cornelia M van Duijn, Philip Scheltens, Ayşe Demirkan, Mark A van de Wiel, Wiesje M van der Flier, Charlotte E Teunissen
INTRODUCTION: Identification of blood-based metabolic changes might provide early and easy-to-obtain biomarkers. METHODS: We included 127 Alzheimer's disease (AD) patients and 121 control subjects with cerebrospinal fluid biomarker-confirmed diagnosis (cutoff tau/amyloid β peptide 42: 0.52). Mass spectrometry platforms determined the concentrations of 53 amine compounds, 22 organic acid compounds, 120 lipid compounds, and 40 oxidative stress compounds. Multiple signatures were assessed: differential expression (nested linear models), classification (logistic regression), and regulatory (network extraction)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28948206/plasma-amyloid-%C3%AE-42-40-ratios-as-biomarkers-for-amyloid-%C3%AE-cerebral-deposition-in-cognitively-normal-individuals
#6
Noelia Fandos, Virginia Pérez-Grijalba, Pedro Pesini, Salvador Olmos, Matías Bossa, Victor L Villemagne, James Doecke, Christopher Fowler, Colin L Masters, Manuel Sarasa
INTRODUCTION: Plasma amyloid β (Aβ) peptides have been previously studied as candidate biomarkers to increase recruitment efficiency in secondary prevention clinical trials for Alzheimer's disease. METHODS: Free and total Aβ42/40 plasma ratios (FP42/40 and TP42/40, respectively) were determined using ABtest assays in cognitively normal subjects from the Australian Imaging, Biomarker and Lifestyle Flagship Study. This population was followed-up for 72 months and their cortical Aβ burden was assessed with positron emission tomography...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28856235/regional-tau-deposition-and-subregion-atrophy-of-medial-temporal-structures-in-early-alzheimer-s-disease-a-combined-positron-emission-tomography-magnetic-resonance-imaging-study
#7
Daichi Sone, Etsuko Imabayashi, Norihide Maikusa, Nobuyuki Okamura, Shozo Furumoto, Yukitsuka Kudo, Masayo Ogawa, Harumasa Takano, Yuma Yokoi, Masuhiro Sakata, Tadashi Tsukamoto, Koichi Kato, Hiroshi Matsuda
INTRODUCTION: Molecular imaging and selective hippocampal subfield atrophy are a focus of recent Alzheimer's disease (AD) research. Here, we investigated correlations between molecular imaging and hippocampal subfields in early AD. METHODS: We investigated 18 patients with early AD and 18 healthy control subjects using (11)C-Pittsburgh compound-B (PIB) positron emission tomography (PET) and (18)F-THK5351 PET and automatic segmentation of hippocampal subfields with high-resolution T2-weighted magnetic resonance imaging...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28795133/performance-of-18-f-flutemetamol-amyloid-imaging-against-the-neuritic-plaque-component-of-cerad-and-the-current-2012-nia-aa-recommendations-for-the-neuropathologic-diagnosis-of-alzheimer-s-disease
#8
Stephen Salloway, Jose E Gamez, Upinder Singh, Carl H Sadowsky, Teresa Villena, Marwan N Sabbagh, Thomas G Beach, Ranjan Duara, Adam S Fleisher, Kirk A Frey, Zuzana Walker, Arvinder Hunjan, Yavir M Escovar, Marc E Agronin, Joel Ross, Andrea Bozoki, Mary Akinola, Jiong Shi, Rik Vandenberghe, Milos D Ikonomovic, Paul F Sherwin, Gill Farrar, Adrian P L Smith, Christopher J Buckley, Dietmar Rudolf Thal, Michelle Zanette, Craig Curtis
INTRODUCTION: Performance of the amyloid tracer [(18)F]flutemetamol was evaluated against three pathology standard of truth (SoT) measures including neuritic plaques (CERAD "original" and "modified" and the amyloid component of the 2012 NIA-AA guidelines). METHODS: After [(18)F]flutemetamol imaging, 106 end-of-life patients who died underwent postmortem brain examination for amyloid plaque load. Blinded positron emission tomography scan interpretations by five independent electronically trained readers were compared with pathology measures...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28761928/familiarity-deficits-in-cognitively-normal-aging-individuals-with-apoe-%C3%AE%C2%B54-a-follow-up-investigation-of-medial-temporal-lobe-structural-correlates
#9
Dorothee Schoemaker, Judes Poirier, D Louis Collins, Serge Gauthier, Jens C Pruessner
INTRODUCTION: The apolipoprotein E ε4 (APOE ε4) allele is a well-documented risk factor for Alzheimer's disease (AD). Accordingly, aging individuals carrying one or more ε4 alleles are at considerably greater risk of developing AD over time. In an effort to characterize early cognitive manifestations of AD, we previously outlined selective deficits in familiarity-based recognition in otherwise asymptomatic carriers of the APOE ε4 allele (Schoemaker et al., 2016). In this follow-up report, we aimed to explore the neural correlates of this selective cognitive impairment...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28761927/body-mass-index-in-midlife-and-dementia-systematic-review-and-meta-regression-analysis-of-589-649-men-and-women-followed-in-longitudinal-studies
#10
REVIEW
Emiliano Albanese, Lenore J Launer, Matthias Egger, Martin J Prince, Panteleimon Giannakopoulos, Frank J Wolters, Kieren Egan
INTRODUCTION: We conducted a meta-analysis of the conflicting epidemiologic evidence on the association between midlife body mass index (BMI) and dementia. METHODS: We searched standard databases to identify prospective, population-based studies of dementia risk by midlife underweight, overweight, and obesity. We performed random-effects meta-analyses and meta-regressions of adjusted relative risk (RR) estimates and formally explored between-study heterogeneity...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28761926/amyloid-%C3%AE-associated-cognitive-decline-in-the-absence-of-clinical-disease-progression-and-systemic-illness
#11
Karra D Harrington, Yen Ying Lim, David Ames, Jason Hassenstab, Simon M Laws, Ralph N Martins, Stephanie Rainey-Smith, Joanne Robertson, Christopher C Rowe, Olivier Salvado, Vincent Doré, Victor L Villemagne, Peter J Snyder, Colin L Masters, Paul Maruff
INTRODUCTION: High levels of amyloid β (Aβ) are associated with cognitive decline in cognitively normal (CN) older adults. This study investigated the nature of cognitive decline in healthy individuals who did not progress to mild cognitive impairment or dementia. METHOD: Cognition was measured over 72 months and compared between low (Aβ-) and high (Aβ+) CN older adults (n = 335) who did not progress to mild cognitive impairment or dementia and who remained free of severe or uncontrolled systemic illness...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28653036/assessment-of-amyloid-%C3%AE-in-pathologically-confirmed-frontotemporal-dementia-syndromes
#12
Rachel H Tan, Jillian J Kril, Yue Yang, Nicole Tom, John R Hodges, Victor L Villemagne, Christopher C Rowe, Cristian E Leyton, John B J Kwok, Lars M Ittner, Glenda M Halliday
INTRODUCTION: The diagnostic utility of in vivo amyloid β (Aβ) imaging to aid in the clinical distinction between frontotemporal dementia (FTD) and Alzheimer's disease remains unclear without data on the prevalence and severity of Aβ in pathologically confirmed FTD syndromes. METHODS: Aβ was assessed in 98 autopsy-confirmed FTD and 36 control cases, and the pathological accuracy of (11)C-Pittsburgh compound B (PiB)-positron emission tomography imaging was assessed in a subset of FTD cases (n = 15)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28653035/a-classification-algorithm-for-predicting-progression-from-normal-cognition-to-mild-cognitive-impairment-across-five-cohorts-the-preclinical-ad-consortium
#13
Alden L Gross, Jason J Hassenstab, Sterling C Johnson, Lindsay R Clark, Susan M Resnick, Melissa Kitner-Triolo, Colin L Masters, Paul Maruff, John C Morris, Anja Soldan, Corinne Pettigrew, Marilyn S Albert
INTRODUCTION: We established a method for diagnostic harmonization across multiple studies of preclinical Alzheimer's disease and validated the method by examining its relationship with clinical status and cognition. METHODS: Cognitive and clinical data were used from five studies (N = 1746). Consensus diagnoses established in each study used criteria to identify progressors from normal cognition to mild cognitive impairment. Correspondence was evaluated between these consensus diagnoses and three algorithmic classifications based on (1) objective cognitive impairment in 2+ tests only; (2) a Clinical Dementia Rating (CDR) of ≥0...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28653034/nutrients-required-for-phospholipid-synthesis-are-lower-in-blood-and-cerebrospinal-fluid-in-mild-cognitive-impairment-and-alzheimer-s-disease-dementia
#14
Nick van Wijk, Rosalinde E R Slot, Flora H Duits, Marieke Strik, Egbert Biesheuvel, John W C Sijben, Marinus A Blankenstein, Jörgen Bierau, Wiesje M van der Flier, Philip Scheltens, Charlotte E Teunissen
INTRODUCTION: Synaptic membrane formation depends on nutrients that fuel metabolic pathways for the synthesis of constituent phospholipids. Consequently, insufficient availability of such nutrients may restrict membrane formation and contribute to synaptic dysfunction in Alzheimer's disease (AD). We assessed whether blood and cerebrospinal fluid (CSF) concentrations of nutrients related to phospholipid synthesis differ among patients with AD, mild cognitive impairment (MCI), and control subjects...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28653033/neuroticism-depression-and-anxiety-traits-exacerbate-the-state-of-cognitive-impairment-and-hippocampal-vulnerability-to-alzheimer-s-disease
#15
Valérie Zufferey, Alessia Donati, Julius Popp, Reto Meuli, Jérôme Rossier, Richard Frackowiak, Bogdan Draganski, Armin von Gunten, Ferath Kherif
INTRODUCTION: Certain personality traits are associated with higher risk of Alzheimer's disease, similar to cognitive impairment. The identification of biological markers associated with personality in mild cognitive impairment could advance the early detection of Alzheimer's disease. METHODS: We used hierarchical multivariate linear models to quantify the interaction between personality traits, state of cognitive impairment, and MRI biomarkers (gray matter brain volume, gray matter mean water diffusion) in the medial temporal lobe (MTL)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28649597/early-diagnosis-of-mild-cognitive-impairment-and-alzheimer-s-disease-based-on-salivary-lactoferrin
#16
Eva Carro, Fernando Bartolomé, Félix Bermejo-Pareja, Alberto Villarejo-Galende, José Antonio Molina, Pablo Ortiz, Miguel Calero, Alberto Rabano, José Luis Cantero, Gorka Orive
INTRODUCTION: The Alzheimer's disease (AD) process is likely initiated many years before clinical onset. Biomarkers of preclinical disease are critical for the development of disease-modifying or even preventative therapies. Current biomarkers for early disease, including cerebrospinal fluid tau and amyloid β (Aβ) levels, structural and functional magnetic resonance imaging, and the use of brain amyloid imaging, are limited because they are very invasive or expensive. Noninvasive biomarkers may be a more accessible alternative, but none can currently detect preclinical AD with the required sensitivity and specificity...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28649596/phenoconversion-from-probable-rapid-eye-movement-sleep-behavior-disorder-to-mild-cognitive-impairment-to-dementia-in-a-population-based-sample
#17
Youngsin Jung, Brendon P Boot, Michelle M Mielke, Tanis J Ferman, Yonas E Geda, Eric McDade, Teresa J H Christianson, David S Knopman, Erik K St Louis, Michael H Silber, Ronald C Petersen, Bradley F Boeve
INTRODUCTION: Rapid eye movement sleep behavior disorder (RBD) is strongly associated with synucleinopathies. In 2012, we reported an increased risk of mild cognitive impairment (MCI) and Parkinson disease (PD) in cognitively normal Olmsted County, Minnesota, residents, aged 70 to 89 years with probable RBD. Here, we examine their progression to dementia and other neurodegenerative phenotypes. METHODS: Fifteen participants with RBD who were diagnosed with either MCI or PD were longitudinally followed, and their subsequent clinical courses were reviewed...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28603769/longitudinal-changes-in-amyloid-positron-emission-tomography-and-volumetric-magnetic-resonance-imaging-in-the-nondemented-down-syndrome-population
#18
Patrick J Lao, Ben L Handen, Tobey J Betthauser, Iulia Mihaila, Sigan L Hartley, Annie D Cohen, Dana L Tudorascu, Peter D Bulova, Brian J Lopresti, Rameshwari V Tumuluru, Dhanabalan Murali, Chester A Mathis, Todd E Barnhart, Charles K Stone, Julie C Price, Darlynne A Devenny, Marsha R Mailick, William E Klunk, Sterling C Johnson, Bradley T Christian
INTRODUCTION: Down syndrome (DS) arises from a triplication of chromosome 21, causing overproduction of the amyloid precursor protein and predisposes individuals to early Alzheimer's disease (AD). METHODS: Fifty-two nondemented adults with DS underwent two cycles of carbon 11-labeled Pittsburgh compound B ([(11)C]PiB) and T1 weighted magnetic resonance imaging (MRI) scans 3.0 ± 0.6 years apart. Standard uptake value ratio (SUVR) images (50-70 minutes; cerebellar gray matter [GM]) and GM volumes were analyzed in standardized space (Montreal Neurological Institute space)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28603768/consensus-guidelines-for-lumbar-puncture-in-patients-with-neurological-diseases
#19
Sebastiaan Engelborghs, Ellis Niemantsverdriet, Hanne Struyfs, Kaj Blennow, Raf Brouns, Manuel Comabella, Irena Dujmovic, Wiesje van der Flier, Lutz Frölich, Daniela Galimberti, Sharmilee Gnanapavan, Bernhard Hemmer, Erik Hoff, Jakub Hort, Ellen Iacobaeus, Martin Ingelsson, Frank Jan de Jong, Michael Jonsson, Michael Khalil, Jens Kuhle, Alberto Lleó, Alexandre de Mendonça, José Luis Molinuevo, Guy Nagels, Claire Paquet, Lucilla Parnetti, Gerwin Roks, Pedro Rosa-Neto, Philip Scheltens, Constance Skårsgard, Erik Stomrud, Hayrettin Tumani, Pieter Jelle Visser, Anders Wallin, Bengt Winblad, Henrik Zetterberg, Flora Duits, Charlotte E Teunissen
INTRODUCTION: Cerebrospinal fluid collection by lumbar puncture (LP) is performed in the diagnostic workup of several neurological brain diseases. Reluctance to perform the procedure is among others due to a lack of standards and guidelines to minimize the risk of complications, such as post-LP headache or back pain. METHODS: We provide consensus guidelines for the LP procedure to minimize the risk of complications. The recommendations are based on (1) data from a large multicenter LP feasibility study (evidence level II-2), (2) systematic literature review on LP needle characteristics and post-LP complications (evidence level II-2), (3) discussion of best practice within the Joint Programme Neurodegenerative Disease Research Biomarkers for Alzheimer's disease and Parkinson's Disease and Biomarkers for Multiple Sclerosis consortia (evidence level III)...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28603767/lumbar-puncture-in-patients-with-neurologic-conditions
#20
Rosha Babapour Mofrad, Femke H Bouwman, Rosalinde E R Slot, Tessa Timmers, Wiesje M van der Flier, Philip Scheltens, Charlotte E Teunissen
A lumbar puncture is performed to obtain cerebral spinal fluid. It is implemented in the clinic on a routine basis to aid the diagnosis of neurologic diseases, such as dementia. This video will show the lumbar puncture procedure as routinely performed in the VUmc Alzheimer Center.
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
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