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Journal of Alzheimer's Disease: JAD

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https://www.readbyqxmd.com/read/28621693/abnormalities-of-cortical-neural-synchronization-mechanisms-in-subjects-with-mild-cognitive-impairment-due-to-alzheimer-s-and-parkinson-s-diseases-an-eeg-study
#1
Claudio Babiloni, Claudio Del Percio, Roberta Lizio, Giuseppe Noce, Susanna Cordone, Susanna Lopez, Andrea Soricelli, Raffaele Ferri, Maria Teresa Pascarelli, Flavio Nobili, Dario Arnaldi, Francesco Famà, Dag Aarsland, Francesco Orzi, Carla Buttinelli, Franco Giubilei, Marco Onofrj, Fabrizio Stocchi, Paola Stirpe, Peter Fuhr, Ute Gschwandtner, Gerhard Ransmayr, Georg Caravias, Heinrich Garn, Fabiola Sorpresi, Michela Pievani, Fabrizia D'Antonio, Carlo De Lena, Bahar Güntekin, Lutfu Hanoğlu, Erol Başar, Görsev Yener, Derya Durusu Emek-Savaş, Antonio Ivano Triggiani, Raffaella Franciotti, Giovanni B Frisoni, Laura Bonanni, Maria Francesca De Pandis
The aim of this retrospective and exploratory study was that the cortical sources of resting state eyes-closed electroencephalographic (rsEEG) rhythms might reveal different abnormalities in cortical neural synchronization in groups of patients with mild cognitive impairment due to Alzheimer's disease (ADMCI) and Parkinson's disease (PDMCI) as compared to healthy subjects. Clinical and rsEEG data of 75 ADMCI, 75 PDMCI, and 75 cognitively normal elderly (Nold) subjects were available in an international archive...
June 10, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598848/synaptic-membrane-synthesis-in-rats-depends-on-dietary-sufficiency-of-vitamin-c-vitamin-e-and-selenium-relevance-for-alzheimer-s-disease
#2
Mehmet Cansev, Mesut Turkyilmaz, John W C Sijben, Cansu Sevinc, Laus M Broersen, Nick van Wijk
Chronic consumption of a diet enriched with nutritional precursors of phospholipids, including uridine and the polyunsaturated fatty acids, docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA), was shown previously to enhance levels of brain phospholipids and synaptic proteins in rodents. Vitamin C, vitamin E, and selenium may directly affect the breakdown or synthesis of membrane phospholipids. The present study investigated the necessity of antioxidants for the effectiveness of supplementation with uridine plus DHA and EPA (as fish oil) in rats...
June 9, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598845/discovery-and-confirmation-of-diagnostic-serum-lipid-biomarkers-for-alzheimer-s-disease-using-direct-infusion-mass-spectrometry
#3
Swati Anand, Justin M Barnes, Sydney A Young, Diana M Garcia, H Dennis Tolley, John S K Kauwe, Steven W Graves
Alzheimer's disease (AD) is a neurodegenerative disorder lacking early biochemical diagnosis and treatment. Lipids have been implicated in neurodegenerative disorders including AD. A shotgun lipidomic approach was undertaken to determine if lipid biomarkers exist that can discriminate AD cases from controls. The discovery study involved sera from 29 different stage AD cases and 32 controls. Lipid extraction was performed using organic solvent and the samples were directly infused into a time-of-flight mass spectrometer...
June 9, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598850/recovery-from-proactive-semantic-interference-and-mri-volume-a%C3%A2-replication-and-extension-study
#4
David A Loewenstein, Rosie E Curiel, Steven DeKosky, Monica Rosselli, Russell Bauer, Maria Grieg-Custo, Ailyn Penate, Chunfei Li, Gabriel Lizagarra, Todd Golde, Malek Adjouadi, Ranjan Duara
BACKGROUND: The rise in incidence of Alzheimer's disease (AD) has led to efforts to advance early detection of the disease during its preclinical stages. To achieve this, the field needs to develop more sensitive cognitive tests that relate to biological markers of disease pathology. Failure to recover from proactive interference (frPSI) is one such cognitive marker that is associated with volumetric reductions in the hippocampus, precuneus, and other AD-prone regions, and to amyloid load in the brain...
June 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598849/overexpression-of-ubiquilin-1-alleviates-alzheimer-s-disease-caused-cognitive-and-motor-deficits-and-reduces-amyloid-%C3%AE-accumulation-in-mice
#5
Oludotun O Adegoke, Fangfang Qiao, Yanying Liu, Kirsty Longley, Shelley Feng, Hongmin Wang
Ubiquilin-1 (Ubqln1) is a ubiquitin-like protein that has been implicated in Alzheimer's disease (AD). However, whether Ubqln1 modulates learning and memory and alters AD-like behavior and/or pathology has not been determined in animal models. To understand the function of Ubqln1 in vivo, we previously generated Ubqln1 transgenic (TG) mice that overexpress mouse Ubqln1. With the model, we here characterized the TG mouse cognitive behaviors and found that Ubqln1 TG mice showed better spatial learning and memory capabilities than their wild-type littermates in both radial arm water maze and Y-maze tests...
June 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598840/neuropsychological-symptoms-in-sporadic-creutzfeldt-jakob-disease-patients-in-germany
#6
Anna Krasnianski, Geeske T Bohling, Uta Heinemann, Daniela Varges, Bettina Meissner, Walter J Schulz-Schaeffer, Andreas Reif, Inga Zerr
BACKGROUND: The polymorphism at codon 129 of the prion protein gene (PRNP) and the PrPSc types 1 and 2 belong to a molecular classification of sporadic Creutzfeldt-Jakob disease (sCJD) that correlates well with the clinical and neuropathological phenotype of sCJD. OBJECTIVE: The aim of the study was to perform the first detailed evaluation of neuropsychological deficits in a large group of definite sCJD patients with known molecular subtype. METHODS: We analyzed neuropsychological symptoms in a cohort of 248 sCJD patients with known M129 V polymorphism of PRNP and prion protein type...
June 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598836/pe859-a-novel-curcumin-derivative-inhibits-amyloid-%C3%AE-and-tau-aggregation-and-ameliorates-cognitive-dysfunction-in-senescence-accelerated-mouse-prone-8
#7
Michiaki Okuda, Yuki Fujita, Ichiro Hijikuro, Mei Wada, Takuya Uemura, Yukako Kobayashi, Tomonori Waku, Naoki Tanaka, Takaaki Nishimoto, Yasuhiko Izumi, Toshiaki Kume, Akinori Akaike, Takashi Takahashi, Hachiro Sugimoto
Aggregation of amyloid-β (Aβ) and tau plays a crucial role in the onset and progression of Alzheimer's disease (AD). Therefore, the inhibition of Aβ and tau aggregation may represent a potential therapeutic target for AD. Herein, we designed and synthesized both Aβ and tau dual aggregation inhibitors based on the structure of curcumin and developed the novel curcumin derivative PE859. In this study, we investigated the inhibitory activity of PE859 on Aβ aggregationin vitro and the therapeutic effects of PE859 on cognitive dysfunction via dual inhibition of Aβ and tau aggregation in vivo...
June 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598847/a-mitochondrial-biomarker-based-study-of-s-equol-in-alzheimer-s-disease-subjects-results-of-a-single-arm-pilot-trial
#8
Heather M Wilkins, Jonathan D Mahnken, Paul Welch, Rebecca Bothwell, Scott Koppel, Richard L Jackson, Jeffrey M Burns, Russell H Swerdlow
Reductions in bioenergetic fluxes, mitochondrial enzyme activities, and mitochondrial number are observed in Alzheimer's disease (AD). Preclinical work indicates estrogen pathway signaling by either estrogen or selective β estrogen receptor (ERβ) agonists benefits these parameters. To assess whether an ERβ agonist could improve mitochondrial function in actual AD subjects, we administered S-equol (10 mg twice daily) to 15 women with AD and determined the platelet mitochondria cytochrome oxidase (COX) activity before initiating S-equol (lead-in), after two weeks of S-equol (active treatment), and two weeks after stopping S-equol (wash-out)...
June 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598842/visit-to-visit-blood-pressure-variability-and%C3%A2-alzheimer-s-disease-links-and-risks
#9
Michiaki Nagai, Keigo Dote, Masaya Kato, Shota Sasaki, Noboru Oda, Eisuke Kagawa, Yoshinori Nakano, Aya Yamane, Tasuku Higashihara, Shunsuke Miyauchi, Akane Tsuchiya
While hypertension has been shown to be a risk factor for vascular dementia, several studies have also demonstrated that hypertension also increases the risk of Alzheimer's disease (AD). Although the relationship between visit-to-visit blood pressure variability (VVV) and cognitive impairment, including AD, have been provided, the mechanisms remain poorly understood. This review paper focuses on the relationship of VVV with AD and summarizes the pathophysiology underlying that relationship, which appears to be mediated by arterial stiffness...
June 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598851/mitochondrial-dysfunction-triggers-synaptic-deficits-via-activation-of-p38-map-kinase-signaling-in-differentiated-alzheimer-s-disease-trans-mitochondrial-cybrid-cells
#10
Qing Yu, Fang Du, Justin T Douglas, Haiyang Yu, Shirley ShiDu Yan, Shi Fang Yan
Loss of synapse and synaptic dysfunction contribute importantly to cognitive impairment in Alzheimer's disease (AD). Mitochondrial dysfunction and oxidative stress are early pathological features in AD-affected brain. However, the effect of AD mitochondria on synaptogenesis remains to be determined. Using human trans-mitochondrial "cybrid" (cytoplasmic hybrid) neuronal cells whose mitochondria were transferred from platelets of patients with sporadic AD or age-matched non-AD subjects with relatively normal cognition, we provide the first evidence of mitochondrial dysfunction compromises synaptic development and formation of synapse in AD cybrid cells in response to chemical-induced neuronal differentiation...
June 6, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598841/effects-of-exercise-on-type-2-diabetes-mellitus-related-cognitive-impairment-and%C3%A2-dementia
#11
Michele Callisaya, Kazunori Nosaka
Cognitive impairment and dementia are common contributors to institutionalization and loss of quality of life in older people. Both type 2 diabetes mellitus (T2DM) and physical inactivity are prevalent and important modifiable risk factors for developing dementia. Physical activity is recommended in the management of T2DM, and there is growing evidence that exercise, a subgroup of physical activity, is also beneficial for maintaining and improving brain structure and function. This paper reviews the evidence for a benefit of exercise on T2DM related cognitive impairment and dementia...
June 6, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598846/neuropsychiatric-symptoms-and-cognitive-impairment-understanding-the-importance-of-co-morbid-symptoms
#12
Moyra E Mortby, Richard Burns, Ranmalee Eramudugolla, Zahinoor Ismail, Kaarin J Anstey
BACKGROUND: Neuropsychiatric symptoms (NPS) are common in older adults with cognitive impairment, yet little is known about population-based prevalence and clinical implications of co-morbid symptom presentation across the spectrum from normal cognition to dementia. OBJECTIVE: To characterize the prevalence of NPS and explore the clinical implications of co-morbid symptom presentation. METHODS: Cross-sectional study of 1,417 older adults (aged 73-79) with dementia (n = 40); with mild cognitive impairment (MCI; n = 133); who are 'cognitively normal, but-at-risk' (CN-AR; n = 397); and who are cognitively normal (n = 847)...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598844/combustion-derived-nanoparticles-in-key-brain-target-cells-and-organelles-in-young-urbanites-culprit-hidden-in-plain-sight-in-alzheimer-s-disease-development
#13
Angélica González-Maciel, Rafael Reynoso-Robles, Ricardo Torres-Jardón, Partha S Mukherjee, Lilian Calderón-Garcidueñas
Millions of children and young adults are exposed to fine particulate matter (PM2.5) and ozone, associated with Alzheimer's disease (AD) risk. Mexico City (MC) children exhibit systemic and brain inflammation, low cerebrospinal fluid (CSF) Aβ1-42, breakdown of nasal, olfactory, alveolar-capillary, duodenal, and blood-brain barriers, volumetric and metabolic brain changes, attention and short-term memory deficits, and hallmarks of AD and Parkinson's disease. Airborne iron-rich strongly magnetic combustion-derived nanoparticles (CDNPs) are present in young urbanites' brains...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598843/a-lipidomics-approach-to-assess-the%C3%A2-association-between-plasma-sphingolipids-and-verbal-memory-performance-in-coronary-artery-disease-patients-undertaking-cardiac-rehabilitation-a-c18-0-signature-for%C3%A2-cognitive-response-to-exercise
#14
Mahwesh Saleem, Nathan Herrmann, Adam Dinoff, Michelle M Mielke, Paul I Oh, Prathiba Shammi, Xingshan Cao, Swarajya Lakshmi Vattem Venkata, Norman J Haughey, Krista L Lanctôt
BACKGROUND: Early subtle deficits in verbal memory, which may indicate early neural risk, are common in patients with coronary artery disease (CAD). While exercise can improve cognition, cognitive response to exercise is heterogeneous. Sphingolipids have been associated with the development and progression of CAD, and impairments in sphingolipid metabolism may play roles in neurodegeneration and in the neural adaptation response to exercise. OBJECTIVE: In this study, change in plasma concentrations of sphingolipids was assessed in relation to change in verbal memory performance and in other cognitive domains among CAD subjects undertaking a 6-month cardiac rehabilitation (CR) program...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598839/functional-disintegration-of-the-default-mode-network-in-prodromal-alzheimer-s-disease
#15
Kim N H Dillen, Heidi I L Jacobs, Juraj Kukolja, Nils Richter, Boris von Reutern, Özgür A Onur, Karl-Josef Langen, Gereon R Fink
Neurodegenerative brain changes can affect the functional connectivity strength between nodes of the default-mode network (DMN), which may underlie changes in cognitive performance. It remains unclear how the functional connectivity strength of DMN nodes differs from healthy to pathological aging and whether these changes are cognitively relevant. We used resting-state functional magnetic resonance imaging to investigate the functional connectivity strength across five DMN nodes in 25 healthy controls (HC), 28 subjective cognitive decline (SCD) participants, and 25 prodromal Alzheimer's disease (AD) patients...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598838/dissociable-effects-of-aging-and-mild-cognitive-impairment-on-bottom-up-audiovisual-integration
#16
Elena K Festa, Andrew P Katz, Brian R Ott, Geoffrey Tremont, William C Heindel
Effective audiovisual sensory integration involves dynamic changes in functional connectivity between superior temporal sulcus and primary sensory areas. This study examined whether disrupted connectivity in early Alzheimer's disease (AD) produces impaired audiovisual integration under conditions requiring greater corticocortical interactions. Audiovisual speech integration was examined in healthy young adult controls (YC), healthy elderly controls (EC), and patients with amnestic mild cognitive impairment (MCI) using McGurk-type stimuli (providing either congruent or incongruent audiovisual speech information) under conditions differing in the strength of bottom-up support and the degree of top-down lexical asymmetry...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28598837/rhamnolipids-microbial-virulence-factors-in-alzheimer-s-disease
#17
Eleni Andreadou, Anastasia A Pantazaki, Makrina Daniilidou, Magda Tsolaki
Alzheimer's disease (AD) has been attributed to chronic bacterial infections. The recognition of human microbiota as a substantial contributor to health and disease is relatively recent and growing. During evolution, mammals live in a symbiotic state with myriads of microorganisms that survive at a diversity of tissue micro-surroundings. Microbes produce a plethora of secretory products [amyloids, lipopolysaccharides, virulence factors rhamnolipids (RLs), toxins, and a great number of neuroactive compounds]...
June 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28582867/understanding-the-link-between-dementia-and-diabetes
#18
Ralph N Martins
No abstract text is available yet for this article.
May 30, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28582866/neurodegenerative-markers-are-increased-in-postmortem-ba21-tissue-from-african-americans-with-alzheimer-s-disease
#19
Sherry A Ferguson, John J Panos, Daniel Sloper, Vijayalakshmi Varma
BACKGROUND: Alzheimer's disease (AD) presents with an earlier onset age and increased symptom severity in African Americans and Hispanics. OBJECTIVE: Although the prevalence of plaques and tangles may not exhibit ethnicity-related differences, levels of neurodegenerative proteins have not been described. METHODS: Here, levels of five proteins (i.e., S100B, sRAGE, GDNF, Aβ40, and Aβ42) and the Aβ42/Aβ40 ratio were measured in postmortem samples of the middle temporal gyrus (BA21) from age-matched African Americans and Caucasians with AD (n = 6/gender/ethnicity)...
May 30, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28582865/motoric-cognitive-risk-syndrome-association-with-incident-dementia-and-disability
#20
Takehiko Doi, Hiroyuki Shimada, Hyuma Makizako, Kota Tsutsumimoto, Joe Verghese, Takao Suzuki
BACKGROUND: It is important to examine the etiology of motoric cognitive risk syndrome (MCR) and its association with dementia and disability to obtain biological insights and to develop preventive strategies. OBJECTIVE: This study aimed to examine the association of MCR with incidence of dementia and disability in a Japanese community-dwelling sample of older adults. METHODS: Participants were 4,235 older adults (50% women, mean age: 72 years)...
May 30, 2017: Journal of Alzheimer's Disease: JAD
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