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https://www.readbyqxmd.com/read/29156222/cerebral-small-vessel-disease-in-middle-age-and-genetic-predisposition-to-late-onset-alzheimer-s-disease
#1
James D Stefaniak, Li Su, Elijah Mak, Nasim Sheikh Bahaei, Katie Wells, Karen Ritchie, Adam Waldman, Craig W Ritchie, John T O'Brien
INTRODUCTION: Cerebral small vessel disease (CSVD) is associated with late-onset Alzheimer's disease (LOAD) and might contribute to the relationship between apolipoprotein E ε4 (APOEε4) and LOAD, in older people. However, it is unclear whether CSVD begins in middle age in individuals genetically predisposed to LOAD. METHODS: We assessed the relationship between radiological markers of CSVD, white matter hyperintensities and microbleeds, and genetic predisposition to LOAD in a cross-sectional analysis of cognitively normal subjects aged 40-59 years recruited from the PREVENT Dementia study...
November 18, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29155947/dementia-after-moderate-severe-traumatic-brain-injury-coexistence-of-multiple-proteinopathies
#2
Kimbra Kenney, Diego Iacono, Brian L Edlow, Douglas I Katz, Ramon Diaz-Arrastia, Kristen Dams-O'Connor, Daniel H Daneshvar, Allison Stevens, Allison L Moreau, Lee S Tirrell, Ani Varjabedian, Anastasia Yendiki, Andre van der Kouwe, Azma Mareyam, Jennifer A McNab, Wayne A Gordon, Bruce Fischl, Ann C McKee, Daniel P Perl
We report the clinical, neuroimaging, and neuropathologic characteristics of 2 patients who developed early onset dementia after a moderate-severe traumatic brain injury (TBI). Neuropathological evaluation revealed abundant β-amyloid neuritic and cored plaques, diffuse β-amyloid plaques, and frequent hyperphosphorylated-tau neurofibrillary tangles (NFT) involving much of the cortex, including insula and mammillary bodies in both cases. Case 1 additionally showed NFTs in both the superficial and deep cortical layers, occasional perivascular and depth-of-sulci NFTs, and parietal white matter rarefaction, which corresponded with decreased parietal fiber tracts observed on ex vivo MRI...
November 16, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29154879/perillyl-alcohol-alleviates-amyloid-%C3%AE-peptides-induced-mitochondrial-dysfunction-and-cytotoxicity-in-sh-sy5y-cells
#3
Mohammad Faraz Zafeer, Fakiha Firdaus, Faraz Ahmad, Rizwan Ullah, Ehraz Anis, Mohd Waseem, Asif Ali, Mohammad Mobarak Hossain
Alzheimer's disease (AD) is a progressive neurodegenerative disorder and the most common type of dementia in elderly ( >65years of age). Excessive extra cellular deposits of amyloid beta (Aβ) are a pathological feature of AD. Aβ can cause cell death through oxidative damage; recent studies have implicated opening of mPTP as a detrimental event in AD-related mitochondrial dysfunctions. Over the past few years, natural compounds with antioxidant properties have shown promise for intervention in AD.
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29154286/clinic-based-validation-of-cerebrospinal-fluid-biomarkers-with-florbetapir-pet-for-diagnosis-of-dementia
#4
Ignacio Álvarez, Miquel Aguilar, Jose Manuel González, Montse Ysamat, Carles Lorenzo-Bosquet, Alvaro Alonso, Juan Pablo Tartari, Silvia Romero, Monica Diez-Fairen, Maria Carcel, Francisco Pujalte, Pau Pastor
BACKGROUND: Cerebrospinal fluid (CSF) biomarker studies have shown variable accuracy for diagnosis of Alzheimer's disease (AD); therefore, internal validation is recommended. OBJECTIVE: To investigate the correlation between CSF biomarkers and cerebral 18-Florbetapir positron emission tomography (Amyloid-PET) and calculate their sensitivity and specificity to obtain the optimal clinical cut-off points to diagnose the etiology of cognitive impairment. METHODS: We performed Amyloid-PET scans and CSF biomarker levels analyses in 68 subjects (50 with mild cognitive impairment, 11 with AD dementia, and 7 with non-AD dementia)...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29154285/prediction-of-alzheimer-s-dementia-in-patients-with-amnestic-mild-cognitive-impairment-in-clinical-routine-incremental-value-of-biomarkers-of-neurodegeneration-and-brain-amyloidosis-added-stepwise-to-cognitive-status
#5
Catharina Lange, Per Suppa, Uwe Pietrzyk, Marcus R Makowski, Lothar Spies, Oliver Peters, Ralph Buchert
The aim of this study was to evaluate the incremental benefit of biomarkers for prediction of Alzheimer's disease dementia (ADD) in mild cognitive impairment (MCI) when added stepwise in the order of their collection in clinical routine. The model started with cognitive status characterized by the ADAS-13 score. Hippocampus volume (HV), cerebrospinal fluid (CSF) phospho-tau (pTau), and the FDG t-sum score in an AD-meta region-of-interest were compared as neurodegeneration markers. CSF-Aβ1-42 was used as amyloidosis marker...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29154281/gradual-cerebral-hypoperfusion-impairs-fear-conditioning-and-object-recognition-learning-and-memory-in-mice-potential-roles-of-neurodegeneration-and-cholinergic-dysfunction
#6
Jogender Mehla, Sean Lacoursiere, Emily Stuart, Robert J McDonald, Majid H Mohajerani
In the present study, male C57BL/6J mice were subjected to gradual cerebral hypoperfusion by implanting an ameroid constrictor (AC) on the left common carotid artery (CCA) and a stenosis on the right CCA. In the sham group, all surgical procedures were kept the same except no AC was implanted and stenosis was not performed. One month following the surgical procedures, fear conditioning and object recognition tests were conducted to evaluate learning and memory functions and motor functions were assessed using a balance beam test...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29154268/patient-characteristics-and-outcomes-associated-with-receiving-an-earlier-versus-later-diagnosis-of-probable-alzheimer-s-disease
#7
Noam Y Kirson, J Scott Andrews, Urvi Desai, Sarah B King, Sophie Schonfeld, Howard G Birnbaum, Daniel E Ball, Kristin Kahle-Wrobleski
BACKGROUND: Effectiveness of Alzheimer's disease (AD) treatments may depend critically on the timeliness of intervention. OBJECTIVE: To compare characteristics and outcomes of patients diagnosed with probable AD (prAD) based on time elapsed from first onset of cognitive decline. METHODS: Patients with ≥1 prAD diagnosis and ≥1 follow-up visit were selected from the National Alzheimer's Coordinating Center (NACC) Uniform Data Set (UDS; 9/2005-6/2015) and stratified based on the time between the perceived onset of cognitive decline at baseline and first prAD diagnosis (i...
November 14, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29151920/viscoelasticity-of-amyloid-plaques-in-transgenic-mouse-brain-studied-by-brillouin-microspectroscopy-and-correlative-raman-analysis
#8
Sara Mattana, Silvia Caponi, Francesco Tamagnini, Daniele Fioretto, Francesca Palombo
Amyloidopathy is one of the most prominent hallmarks of Alzheimer's disease (AD), the leading cause of dementia worldwide, and is characterized by the accumulation of amyloid plaques in the brain parenchyma. The plaques consist of abnormal deposits mainly composed of an aggregation-prone protein fragment, β-amyloid 1-40/1-42, into the extracellular matrix. Brillouin microspectroscopy is an all-optical contactless technique that is based on the interaction between visible light and longitudinal acoustic waves or phonons, giving access to the viscoelasticity of a sample on a subcellular scale...
November 2017: Journal of Innovative Optical Health Sciences
https://www.readbyqxmd.com/read/29150331/anti-amyloidogenic-and-anti-apoptotic-effect-of-%C3%AE-bisabolol-against-a%C3%AE-induced-neurotoxicity-in-pc12-cells
#9
Balakrishnan Shanmuganathan, Venkatesan Suryanarayanan, Sethuraman Sathya, Muralidharan Narenkumar, Sanjeev Kumar Singh, Kandasamy Ruckmani, Kasi Pandima Devi
Alzheimer's disease (AD) is a life-threatening neurodegenerative disorder leading to dementia, with a progressive decline in memory and other thinking skills of elderly populace. Of the multiple etiological factors of AD, the accumulation of senile plaques (SPs) particularly as Aβ oligomers correlates with the relentlessness cognitive impairment in AD patients and play a vital role in AD pathology. Since natural essential oil constituents have successfully served as a source of drugs for AD treatment, the present study aims at the in vitro and in silico investigation of anti-amyloidogenic potential and anti-apoptotic property of the α-bisabolol against Aβ25-35 induced neurotoxicity in PC12 cells...
October 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29150293/a-unique-and-promising-combination-of-medications-for-the-treatment-of-alzheimer-s-disease
#10
James D Weinstein
At present there is no therapy for Alzheimer's Disease which completely stops the progressive dementia effecting late onset Alzheimer's Disease (AD) patients. It is felt that the main reason for this failure is that AD appears to be a disease caused by four major pathological processes. To date, efforts to develop treatments have addressed only one or another of these four etiologies. However, even a partially effective therapy against one cause allows the others, untreated, to continue their inexorable destruction of the neurons of the brain...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149835/forkhead-transcription-factors-formulating-a-foxo-target-for-cognitive-loss
#11
Kenneth Maiese
BACKGROUND: With almost 47 million individuals worldwide suffering from some aspect of dementia, it is clear that cognitive loss impacts a significant proportion of the global population. Unfortunately, definitive treatments to resolve or prevent the onset of cognitive loss are limited. In most cases such care is currently non-existent prompting the need for novel treatment strategies. METHODS: Mammalian forkhead transcription factors of the O class (FoxO) are one such avenue of investigation that offer an exciting potential to bring new treatments forward for disorders that involve cognitive loss...
November 15, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/29149795/development-of-a-psycho-educational-support-program-for-individuals-with-primary-progressive-aphasia-and-their-care-partners
#12
Darby J Morhardt, Mary C O'Hara, Kristine Zachrich, Christina Wieneke, Emily J Rogalski
Primary progressive aphasia is a language-based dementia that initially spares other cognitive domains; however, aphasia interferes with many life roles such as work and interpersonal relationships. Psycho-educational programs, such as support groups have been shown to be effective for persons with Alzheimer's dementia; however, little is known regarding their effectiveness for persons with primary progressive aphasia. This paper describes the development of a program that offers support, education and activities for persons with primary progressive aphasia and their care-partners and its feasibility...
January 1, 2017: Dementia
https://www.readbyqxmd.com/read/29149791/the-dementia-care-coordination-program-engaging-health-systems-in-caregiver-supports
#13
Pamela Nadash, Nina M Silverstein, Frank Porell
This paper reports on a process evaluation using mixed methods to assess a Dementia Care Coordination Program, which is distinctive in using the medical system, rather than direct outreach, to identify and refer families to supports provided by an Alzheimer's Association chapter via dedicated care consultants. One care consultant received referrals from individual physicians, while the other, employed by a health plan, received referrals from health plan case managers. Through key informant interviews, focus groups, and physician and caregiver surveys, we identified key issues, finding high rates of stakeholder satisfaction, but some practical issues around information sharing and data tracking...
January 1, 2017: Dementia
https://www.readbyqxmd.com/read/29149110/-does-omega-3-supplementation-after-the-age-of-65-influence-cognitive-function-results-of-a-systematic-review
#14
REVIEW
J Baleztena, M Arana, M Bes-Rastrollo, M C Castellanos, M J Gozalo, M Ruiz-Canela
BACKGROUND: The percentage of the older population is progressively increasing as are diseases associated with aging such as cognitive decline (CD) and dementia. Observational epidemiological studies suggest that diets rich in omega 3 polyunsaturated fatty acids (w3-PUFA) might reduce the risk of CD and dementia. The main objective was to assess whether there is sufficient scientific evidence about the relationship between w3-PUFA supplementation in patients aged 65 or older and cognitive performance...
November 17, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29147068/the-italian-version-of-the-five-word-test-a-simple-diagnostic-test-for-dementia-due-to-alzheimer-s-disease-in-routine-clinical-practice
#15
Luca Rozzini, Anna Ceraso, Marina Zanetti, Silvia Pelizzari, Evita Tomasoni, Vivian Accardo, Alessandro Padovani
Background: The five-word test (FWT) is a neuropsychological tool (derived from the Grober and Buschke paradigm), measuring hippocampal memory trace consolidation. The study aimed to validate the test for the Italian language and to verify its ability to discriminate patients affected by mild cognitive impairment and dementia due to Alzheimer's disease from healthy matches. Methods: 217 subjects (127 controls, 47 MCI due to AD, and 43 AD) underwent neuropsychological evaluation...
2017: Behavioural Neurology
https://www.readbyqxmd.com/read/29146478/diacylglycerols-as-biomarkers-of-sustained-immune-activation-in-proteinopathies-associated-with-dementia
#16
REVIEW
Paul L Wood, John E Cebak, Randall L Woltjer
Cognitive decline is a devastating clinical condition, heavily correlated with age progression. In the cases of Alzheimer's disease, Parkinson's disease, and Lewy body disease, the common neuropathologies are proteinopathies and neuroinflammation. Herein, we review current lipidomics findings and conclude that brain and circulating diacylglycerols represent biomarkers of this ongoing sustained immune response, presumably involving microglia. We further hypothesize that a logical next step will be to evaluate biomarkers of immune activation in a cohort of patients with Mild Cognitive Impairment (MCI) and subsequently attempt to provide therapeutic intervention with anti-inflammatory therapy in MCI patients with immune activation...
November 13, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29146111/microrna-expression-patterns-in-human-anterior-cingulate-and-motor-cortex-a-study-of-dementia-with-lewy-bodies-cases-and-controls
#17
Peter T Nelson, Wang-Xia Wang, Sarah A Janse, Katherine L Thompson
OVERVIEW: MicroRNAs (miRNAs) have been implicated in neurodegenerative diseases including Parkinson's disease and Alzheimer's disease (AD). Here, we evaluated the expression of miRNAs in anterior cingulate (AC; Brodmann area [BA] 24) and primary motor (MO; BA 4) cortical tissue from aged human brains in the University of Kentucky AD Center autopsy cohort, with a focus on dementia with Lewy bodies (DLB). METHODS: RNA was isolated from gray matter of brain samples with pathology-defined DLB, AD, AD+DLB, and low-pathology controls, with n=52 cases initially included (n=23 with DLB), all with low (<4hrs) postmortem intervals...
November 13, 2017: Brain Research
https://www.readbyqxmd.com/read/29146049/common-and-rare-tbk1-variants-in-early-onset-alzheimer-disease-in-a-european-cohort
#18
Jan Verheijen, Julie van der Zee, Ilse Gijselinck, Tobi Van den Bossche, Lubina Dillen, Bavo Heeman, Estrella Gómez-Tortosa, Albert Lladó, Raquel Sanchez-Valle, Caroline Graff, Pau Pastor, Maria A Pastor, Luisa Benussi, Roberta Ghidoni, Giuliano Binetti, Jordi Clarimon, Alexandre de Mendonça, Ellen Gelpi, Magda Tsolaki, Janine Diehl-Schmid, Benedetta Nacmias, Maria Rosário Almeida, Barbara Borroni, Radoslav Matej, Agustín Ruiz, Sebastiaan Engelborghs, Rik Vandenberghe, Peter P De Deyn, Marc Cruts, Christine Van Broeckhoven, Kristel Sleegers
TANK-binding kinase 1 (TBK1) loss-of-function (LoF) mutations are known to cause frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS), often combined with memory deficits early in the disease course. We performed targeted resequencing of TBK1 in 1253 early onset Alzheimer's disease (EOAD) patients from 8 European countries to investigate whether pathogenic TBK1 mutations are enriched among patients with clinical diagnosis of EOAD. Variant frequencies were compared against 2117 origin-matched controls...
October 25, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29145658/characterization-of-detergent-insoluble-proteome-in-chronic-traumatic-encephalopathy
#19
Jonathan D Cherry, Ahmad Zeineddin, Eric B Dammer, James A Webster, Duc Duong, Nicholas T Seyfried, Allan I Levey, Victor E Alvarez, Bertrand R Huber, Thor D Stein, Patrick T Kiernan, Ann C McKee, James J Lah, Chadwick M Hales
Quantitative proteomics of postmortem human brain can identify dysfunctional proteins that contribute to neurodegenerative disorders like Alzheimer disease (AD) and frontotemporal dementia. Similar studies in chronic traumatic encephalopathy (CTE) are limited, therefore we hypothesized that proteomic sequencing of CTE frontal cortex brain homogenates from varying CTE pathologic stages may provide important new insights into this disorder. Quantitative proteomics of control, CTE and AD brains was performed to characterize differentially expressed proteins, and we identified over 4000 proteins in CTE brains, including significant enrichment of the microtubule associated protein tau...
November 14, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29143870/head-to-head-comparison-of-18-f-av-1451-and-18-f-thk5351-for-tau-imaging-in-alzheimer-s-disease-and-frontotemporal-dementia
#20
Young Kyoung Jang, Chul Hyoung Lyoo, Seongbeom Park, Seung Jun Oh, Hanna Cho, Minyoung Oh, Young Hoon Ryu, Jae Yong Choi, Gil D Rabinovici, Hee Jin Kim, Seung Hwan Moon, Hyemin Jang, Jin San Lee, William J Jagust, Duk L Na, Jae Seung Kim, Sang Won Seo
PURPOSE: Tau accumulation is a core pathologic change in various neurodegenerative diseases including Alzheimer's disease and frontotemporal lobar degeneration-tau. Recently, tau positron emission tomography tracers such as [(18)F] AV-1451 and [(18)F] THK5351 have been developed to detect tau deposition in vivo. In the present study, we performed a head to head comparison of these two tracers in Alzheimer's disease and frontotemporal dementia cases and aimed to investigate which tracers are better suited to image tau in these disorders...
November 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
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