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https://www.readbyqxmd.com/read/29785782/path-analysis-of-caregiver-characteristics-and-neuropsychiatric-symptoms-in-alzheimer-s-disease-patients
#1
Lais L Delfino, Ricardo S Komatsu, Caroline Komatsu, Anita L Neri, Meire Cachioni
AIM: To determine the direct and indirect relationships of sociodemographic, emotional and behavioral characteristics of family caregivers of Alzheimer's disease patients who have neuropsychiatric symptoms. METHODS: A total of 134 family caregivers answered a questionnaire with sociodemographic data, and questions regarding the context of care, Neuropsychiatric Inventory, Zarit Burden Interview, Dementia Management Strategies Scale and the Beck Depression Inventory...
May 22, 2018: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/29784047/memory-related-subjective-cognitive-symptoms-in-the-adult-population-prevalence-and-associated-factors-results-of-the-life-adult-study
#2
Tobias Luck, Susanne Roehr, Francisca S Rodriguez, Matthias L Schroeter, A Veronica Witte, Andreas Hinz, Anja Mehnert, Christoph Engel, Markus Loeffler, Joachim Thiery, Arno Villringer, Steffi G Riedel-Heller
BACKGROUND: Subjectively perceived memory problems (memory-related Subjective Cognitive Symptoms/SCS) can be an indicator of a pre-prodromal or prodromal stage of a neurodegenerative disease such as Alzheimer's disease. We therefore sought to provide detailed empirical information on memory-related SCS in the dementia-free adult population including information on prevalence rates, associated factors and others. METHODS: We studied 8834 participants (40-79 years) of the population-based LIFE-Adult-Study...
May 21, 2018: BMC Psychology
https://www.readbyqxmd.com/read/29782959/targeting-central-%C3%AE-2-receptors-ameliorates-streptozotocin-induced-neuroinflammation-via-inhibition-of-glycogen-synthase-kinase3-pathway-in-mice
#3
Nora O Abdel Rasheed, Nesrine S El-Sayed, Aiman S El-Khatib
Alzheimer's disease (AD) is portrayed by progressive cognitive decline and pathological deposition of amyloid plaques as well as neurofibrillary tangles. Most of AD cases are sporadic, resulting from overlap of various environmental and genetic factors. Intra-cerebroventricular injection of streptozotocin (STZ) leads to insulin resistance brain state accompanied by memory decline, oxidative stress, and neuro-degeneration which mimic the pathologies associated with sporadic Alzheimer's disease (SAD). In the current study, protective effects of formoterol in STZ-induced SAD were studied...
May 18, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29782833/insights-into-stabilizing-forces-in-amyloid-fibrils-of-differing-sizes-from-polarizable-molecular-dynamics-simulations
#4
Darcy S Davidson, Anne M Brown, Justin A Lemkul
Pathological aggregation of amyloid-forming proteins is a hallmark of a number of human diseases, including Alzheimer's, type 2 diabetes, Parkinson's, and more. Despite having very different primary amino acid sequences, these amyloid proteins form similar supramolecular, fibril structures that are highly resilient to physical and chemical denaturation. To better understand the structural stability of disease-related amyloids and to gain a greater understanding of factors that stabilize functional amyloid assemblies, insights into tertiary and quaternary interactions are needed...
May 18, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29782824/apoe-%C3%AE%C2%B54-associates-with-hippocampal-volume-learning-and-memory-across-the-spectrum-of-alzheimer-s-disease-and-dementia-with-lewy-bodies
#5
Usman Saeed, Saira S Mirza, Bradley J MacIntosh, Nathan Herrmann, Julia Keith, Joel Ramirez, Sean M Nestor, Qinggang Yu, Jo Knight, Walter Swardfager, Steven G Potkin, Ekaterina Rogaeva, Peter St George-Hyslop, Sandra E Black, Mario Masellis
INTRODUCTION: Although the apolipoprotein E ε4-allele (APOE-ε4) is a susceptibility factor for Alzheimer's disease (AD) and dementia with Lewy bodies (DLB), its relationship with imaging and cognitive measures across the AD/DLB spectrum remains unexplored. METHODS: We studied 298 patients (AD = 250, DLB = 48; 38 autopsy confirmed; NCT01800214) using neuropsychological testing, volumetric magnetic resonance imaging, and APOE genotyping to investigate the association of APOE-ε4 with hippocampal volume and learning/memory phenotypes, irrespective of diagnosis...
May 18, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29782798/regulatory-activities-of-dopamine-and-its-derivatives-towards-metal-free-and-metal-induced-amyloid-%C3%AE-aggregation-oxidative-stress-and-inflammation-in-alzheimer-s-disease
#6
Eunju Nam, Jeffrey S Derrick, Seunghee Lee, Juhye Kang, Jiyeon Han, Shin Jung C Lee, Su Wol Chung, Mi Hee Lim
A catecholamine neurotransmitter, dopamine (DA), is suggested to be linked to the pathology of dementia; however, the involvement of DA and its structural analogues in the pathogenesis of Alzheimer's disease (AD), the most common form of dementia, composed of multiple pathogenic factors has not been clear. Herein, we report that DA and its rationally designed structural derivatives (1-6) based on DA's oxidative transformation are able to modulate multiple pathological elements found in AD [ i.e., metal ions, metal-free amyloid-β (Aβ), metal-bound Aβ (metal-Aβ), and reactive oxygen species (ROS)], with demonstration of detailed molecular-level mechanisms...
May 21, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29782319/the-relationship-between-obstructive-sleep-apnea-and-alzheimer-s-disease
#7
Andreia Andrade, Omonigho M Bubu, Andrew W Varga, Ricardo S Osorio
 Obstructive sleep apnea (OSA) and Alzheimer's disease (AD) are highly prevalent conditions with growing impact on our aging society. While the causes of OSA are now better characterized, the mechanisms underlying AD are still largely unknown, challenging the development of effective treatments. Cognitive impairment, especially affecting attention and executive functions, is a recognized clinical consequence of OSA. A deeper contribution of OSA to AD pathogenesis is now gaining support from several lines of research...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782316/from-subjective-cognitive-decline-to-alzheimer-s-disease-the-predictive-role-of-neuropsychological-assessment-personality-traits-and-cognitive-reserve-a-7-year-follow-up-study
#8
Valentina Bessi, Salvatore Mazzeo, Sonia Padiglioni, Carolina Piccini, Benedetta Nacmias, Sandro Sorbi, Laura Bracco
The aim of this study was to evaluate the accuracy of neuropsychological assessment in predicting conversion from subjective cognitive decline (SCD) and mild cognitive impairment (MCI) to Alzheimer's disease (AD) and the effect of personality traits and cognitive reserve in progression from SCD to MCI. As part of a longitudinal, clinical-neuropsychological-genetic survey on SCD and MCI, 284 patients referred to our hospital between 1990 and 2017 were included. All patients underwent clinical-extensive neuropsychological evaluation and Apolipoprotein E genotyping; personality traits were assessed in a subgroup...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782311/the-independent-associations-of-physical-activity-and-sleep-with-cognitive-function-in-older-adults
#9
Ryan S Falck, John R Best, Jennifer C Davis, Teresa Liu-Ambrose
BACKGROUND: Current evidence suggests physical activity (PA) and sleep are important for cognitive health; however, few studies examining the role of PA and sleep for cognitive health have measured these behaviors objectively. OBJECTIVE: We cross-sectionally examined whether 1) higher PA is associated with better cognitive performance independently of sleep quality; 2) higher sleep quality is associated with better cognitive performance independently of PA; and 3) whether higher PA is associated with better sleep quality...
May 15, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782310/putative-gonadotropin-releasing-hormone-agonist-therapy-and-dementia-an-application-of-medicare-hospitalization-claims-data
#10
Mark A Smith, Richard L Bowen, Richard Q Nguyen, George Perry, Craig S Atwood, Alfred A Rimm
BACKGROUND: Estrogen and hormone replacement therapies to reduce Alzheimer's disease (AD) have yielded conflicting results. However, this study proposes that the well-characterized increase in serum gonadotropins following menopause or andropause are accountable for the increased risk of developing AD among the elderly population. OBJECTIVE: To determine the role of gonadotropins in the development of AD and investigate gonadotropin-releasing hormone (GnRH) agonist therapy as a potential preventative and/or disease-modifying approach to AD management...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29781774/a-perfect-storm-challenges-encountered-by-family-caregivers-of-persons-with-alzheimer-s-disease-during-natural-disasters
#11
Allison Gibson, Jessica Walsh, Lisa M Brown
Since Hurricane Katrina there has been a movement across the U.S. to examine best practice for disaster response within the aging population. However, little is known about the experience of natural disasters from the perspective of family caregivers of persons with Alzheimer's disease and related dementia (ADRD). In this exploratory, qualitative study, family caregivers (n=27) were interviewed about their experience with the historic 2015 South Carolina flood. By using thematic analysis, themes were identified to better understand what unique challenges caregivers of person with ADRD experienced...
May 21, 2018: Journal of Gerontological Social Work
https://www.readbyqxmd.com/read/29781669/trajectories-of-irregular-word-reading-ability-as-a-proxy-for-premorbid-intelligence-in-alzheimer-s-disease-mild-cognitive-impairment-and-healthy-aging-a-longitudinal-study
#12
Michael Weinborn, Romola S Bucks, Hamid R Sohrabi, Stephanie R Rainey-Smith, Belinda M Brown, Samantha L Gardener, Aleksandra Gozt, Daniel Christensen, Greg Savage, Simon M Laws, Kevin Taddei, Paul Maruff, Joanne S Robertson, Kathryn A Ellis, David Ames, Colin L Masters, Christopher C Rowe, Ralph N Martins
The ability to read irregularly spelled words is commonly used to estimate premorbid intelligence, as this ability has been thought to be resistant to early effects of neurodegenerative disorders. However, studies evaluating decline of this skill in Alzheimer's disease (AD) have produced conflicting results. Irregular word reading was assessed three times over 36 months in a large (N = 995) sample, including healthy control, AD, and Mild Cognitive Impairment (MCI) groups. At baseline, MCI and AD groups read correctly an average of 3...
May 21, 2018: Psychological Assessment
https://www.readbyqxmd.com/read/29780880/circadian-and-brain-state-modulation-of-network-hyperexcitability-in-alzheimer-s-disease
#13
Rosalind Brown, Alice D Lam, Alfredo Gonzalez-Sulser, Andrew Ying, Mary Jones, Robert Chang-Chih Chou, Makis Tzioras, Crispin Y Jordan, Izabela Jedrasiak-Cape, Anne-Laure Hemonnot, Maurice Abou Jaoude, Andrew J Cole, Sydney S Cash, Takashi Saito, Takaomi Saido, Richard R Ribchester, Kevan Hashemi, Iris Oren
Network hyperexcitability is a feature of Alzheimer' disease (AD) as well as numerous transgenic mouse models of AD. While hyperexcitability in AD patients and AD animal models share certain features, the mechanistic overlap remains to be established. We aimed to identify features of network hyperexcitability in AD models that can be related to epileptiform activity signatures in AD patients. We studied network hyperexcitability in mice expressing amyloid precursor protein (APP) with mutations that cause familial AD, and compared a transgenic model that overexpresses human APP (hAPP) (J20), to a knock-in model expressing APP at physiological levels (APPNL/F )...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29780875/amyloid-%C3%AE-peptides-are-differentially-vulnerable-to-preanalytical-surface-exposure-an-effect-incompletely-mitigated-by-the-use-of-ratios
#14
Jamie Toombs, Martha S Foiani, Henrietta Wellington, Ross W Paterson, Charles Arber, Amanda Heslegrave, Michael P Lunn, Jonathan M Schott, Selina Wray, Henrik Zetterberg
Introduction: We tested the hypothesis that the amyloid β (Aβ) peptide ratios are more stable than Aβ42 alone when biofluids are exposed to two preanalytical conditions known to modify measurable Aβ concentration. Methods: Human cerebrospinal fluid (CSF) and culture media (CM) from human cortical neurons were exposed to a series of volumes and polypropylene surfaces. Aβ42 , Aβ40 , and Aβ38 peptide concentrations were measured using a multiplexed electrochemiluminescence immunoassay...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780869/cross-sectional-and-longitudinal-atrophy-is-preferentially-associated-with-tau-rather-than-amyloid-%C3%AE-positron-emission-tomography-pathology
#15
Brian A Gordon, Austin McCullough, Shruti Mishra, Tyler M Blazey, Yi Su, John Christensen, Aylin Dincer, Kelley Jackson, Russ C Hornbeck, John C Morris, Beau M Ances, Tammie L S Benzinger
Introduction: Structural magnetic resonance imaging is a marker of gray matter health and decline that is sensitive to impaired cognition and Alzheimer's disease pathology. Prior work has shown that both amyloid β (Aβ) and tau biomarkers are related to cortical thinning, but it is unclear what unique influences they have on the brain. Methods: Aβ pathology was measured with [18 F] AV-45 (florbetapir) positron emission tomography (PET) and tau was assessed with [18 F] AV-1451 (flortaucipir) PET in a population of 178 older adults, of which 123 had longitudinal magnetic resonance imaging assessments (average of 5...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780867/topographic-staging-of-tau-positron-emission-tomography-images
#16
Adam J Schwarz, Sergey Shcherbinin, Lawrence J Slieker, Shannon L Risacher, Arnaud Charil, Michael C Irizarry, Adam S Fleisher, Sudeepti Southekal, Abhinay D Joshi, Michael D Devous, Bradley B Miller, Andrew J Saykin
Introduction: It has been proposed that the signal distribution on tau positron emission tomography (PET) images could be used to define pathologic stages similar to those seen in neuropathology. Methods: Three topographic staging schemes for tau PET, two sampling the temporal and occipital subregions only and one sampling cortical gray matter across the major brain lobes, were evaluated on flortaucipir F 18 PET images in a test-retest scenario and from Alzheimer's Disease Neuroimaging Initiative 2...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780865/elevated-medial-temporal-lobe-and-pervasive-brain-tau-pet-signal-in-normal-participants
#17
Val J Lowe, Tyler J Bruinsma, Hoon-Ki Min, Emily S Lundt, Ping Fang, Matthew L Senjem, Bradley F Boeve, Keith A Josephs, Mukesh K Pandey, Melissa E Murray, Kejal Kantarci, David T Jones, Christopher G Schwarz, David S Knopman, Ronald C Petersen, Clifford R Jack
Introduction: Medial temporal lobe (MTL) uptake on tau-positron emission tomography (PET) is seen not only in Alzheimer's disease (AD) dementia but also in the aging population. The relationship of these findings to the development of AD dementia needs to be better understood. Methods: Tau-PET with AV-1451 was performed on 576 cognitively unimpaired (CU) participants aged 50-94 years. The number of CUs with and without abnormal MTL regions and those with or without extra-MTL abnormalities was determined...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780863/a-novel-cognitive-functional-composite-measure-to-detect-changes-in-early-alzheimer-s-disease-test-retest-reliability-and-feasibility
#18
Roos J Jutten, John Harrison, Philippe R Lee Meeuw Kjoe, Esther M Opmeer, Niki S M Schoonenboom, Frank Jan de Jong, Craig W Ritchie, Philip Scheltens, Sietske A M Sikkes
Introduction: To improve the detection of changes in Alzheimer's disease (AD), we designed the cognitive-functional composite (CFC). As a first validation step, we investigated its test-retest reliability and feasibility of use. Methods: We performed a test-retest study with 2-3 weeks between assessments, including patients with mild cognitive impairment (MCI) or mild AD dementia and cognitively healthy participants. We calculated intraclass correlation coefficients (ICCs) type absolute agreement for all CFC measures and compared baseline and retest scores using paired-samples t -tests...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29780861/the-relationship-between-recall-of-recently-versus-remotely-encoded-famous-faces-and-amyloidosis-in-clinically-normal-older-adults
#19
Irina Orlovsky, Willem Huijbers, Bernard J Hanseeuw, Elizabeth C Mormino, Trey Hedden, Rachel F Buckley, Molly LaPoint, Jennifer S Rabin, Dorene M Rentz, Keith A Johnson, Reisa A Sperling, Kathryn V Papp
Introduction: Alzheimer's disease (AD) patients exhibit temporally graded memory loss with remote memories remaining more intact than recent memories. It is unclear whether this temporal pattern is observable in clinically normal adults with amyloid pathology (i.e. preclinical AD). Methods: Participants were asked to recall the names of famous figures most prominent recently (famous after 1990) and remotely (famous from 1960-1980) and were provided with a phonemic cue to ensure that memory failure was not purely due to verbal retrieval weaknesses...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29777037/inhibition-of-tbc1d5-activates-rab7a-and-can-enhance-the-function-of-the-retromer-cargo-selective-complex
#20
Matthew N J Seaman, Aamir S Mukadam, Sophia Y Breusegem
The retromer complex is a vital component of the endosomal protein sorting machinery being necessary for sorting into both the endosome-to-Golgi retrieval pathway and also the endosome-to-cell-surface recycling pathway. Retromer mediates cargo selection through a trimeric complex comprising VPS35, VPS29 and VPS26 which is recruited to endosomes by binding to Rab7a and Snx3. Retromer function is linked to two distinct neurodegenerative diseases, Parkinson's disease and Alzheimer's disease and modulating retromer function has been proposed as an avenue to explore for a putative therapy in these conditions...
May 18, 2018: Journal of Cell Science
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