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Journal of Alzheimer's Disease: JAD

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https://www.readbyqxmd.com/read/28527220/quantitative-erythrocyte-omega-3-epa-plus-dha-levels-are-related-to-higher-regional-cerebral-blood-flow-on-brain-spect
#1
Daniel G Amen, William S Harris, Parris M Kidd, Somayeh Meysami, Cyrus A Raji
BACKGROUND: The interrelationships between omega-3 fatty acids status, brain perfusion, and cognition are not well understood. OBJECTIVE: To evaluate if SPECT brain imaging of cerebral perfusion and cognition varies as a function of omega-3 fatty acid levels. METHODS: A random sample of 166 study participants was drawn from a psychiatric referral clinical for which erythrocyte quantification of omega-3 eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA) (the Omega-3 Index) was available...
May 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527221/glutathione-conformations-and-its-implications-for-in-vivo-magnetic-resonance-spectroscopy
#2
Pravat K Mandal, Deepika Shukla, Varan Govind, Yves Boulard, Lars Ersland
Glutathione (GSH) is a major antioxidant in humans that is involved in the detoxification of reactive radicals and peroxides. The molecular structural conformations of GSH depend on the surrounding micro-environment, and it has been experimentally evaluated using NMR and Raman spectroscopic techniques as well as by molecular dynamics simulation studies. The converging report indicates that GSH exists mainly in two major conformations, i.e., "extended" and "folded". The NMR-derived information on the GSH conformers is essential to obtain optimal acquisition parameters in in vivo MRS experiments targeted for GSH detection...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527219/tmem230-accumulation-in-granulovacuolar-degeneration-bodies-and-dystrophic-neurites-of-alzheimer-s-disease
#3
Sandra L Siedlak, Yingfei Jiang, Mikayla L Huntley, Luwen Wang, Ju Gao, Fei Xie, Jingyi Liu, Bo Su, George Perry, Xinglong Wang
Transmembrane Protein 230 (TMEM230) is a newly identified protein associated with Parkinson's disease (PD) found in Lewy bodies and Lewy neurites of patients with PD or dementia with Lewy body disease. However, TMEM230 has not yet been investigated in the most common neurodegenerative disorder, Alzheimer's disease (AD). Here, we demonstrate that the expression of TMEM230 is specifically increased in neurons in AD patients. Importantly, both granulovacuolar degeneration (GVD) and dystrophic neurites (DNs), two prominent characteristic pathological structures associated with AD, contain TMEM230 aggregates...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527218/the-mechanisms-of-action-of-curcumin-in%C3%A2-alzheimer-s-disease
#4
Mengxi Tang, Changiz Taghibiglou
Alzheimer's disease (AD) is a neurodegenerative disorder of the elderly. As the prevalence of AD rises in the 21st century, there is an urgent need for the development of effective pharmacotherapies. Currently, drug treatments target the symptoms of the disease and do not modify or halt the disease progress. Thus, natural compounds have been investigated for their ability to treat AD. This review examines the efficacy of curcumin, a polyphenol derived from turmeric herb, to treat AD. We summarize the in vivo and in vitro research describing the mechanisms of action in which curcumin modifies AD pathology: curcumin inhibits the formation and promotes the disaggregation of amyloid-β plaques, attenuates the hyperphosphorylation of tau and enhances its clearance, binds copper, lowers cholesterol, modifies microglial activity, inhibits acetylcholinesterase, mediates the insulin signaling pathway, and is an antioxidant...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527217/protein-phosphorylation-is-a-key-mechanism-in-alzheimer-s-disease
#5
Joana Oliveira, Márcio Costa, Maria Soares Cachide de Almeida, Odete A B da Cruz E Silva, Ana Gabriela Henriques
Altered protein phosphorylation states of several proteins are closely associated with Alzheimer's disease (AD). Among these are the amyloid-β precursor protein (AβPP) and the tau protein. In fact, altered protein phosphorylation states already provide strong biomarkers for AD diagnosis, as is the case with hyperphosphorylated tau. It follows that modulating signaling cascades provides an attractive avenue for exploring novel therapeutic strategies. This review focuses on some of the major protein kinases and protein phosphatases relevant to AD...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527216/effects-of-healthy-aging-and-mild-cognitive-impairment-on-a-real-life-decision-making-task
#6
Marie-Theres Pertl, Thomas Benke, Laura Zamarian, Margarete Delazer
In this study, we investigated the effects of age and of mild cognitive impairment (MCI) on decision making under risk by adopting a task representing real-life health-related situations and involving complex numerical information. Moreover, we assessed the relationship of real-life decision making to other cognitive functions such as number processing, executive functions, language, memory, and attention. For this reason, we compared the performance of 19 healthy, relatively younger adults with that of 18 healthy older adults as well as the performance of the 18 healthy older adults with that of 17 patients with MCI...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527213/sorl1-variants-show-different-association-with-early-onset-and-late-onset-alzheimer-s-disease-risk
#7
Guiyou Liu, Jing-Yi Sun, Meiling Xu, Xiao-Yi Yang, Bao-Liang Sun
A recent study sequenced the full coding region of SORL1 in 1,255 early-onset Alzheimer's disease (EOAD) cases and 1,938 control individuals, and investigated the contribution of genetic variability in SORL1 to EOAD risk in a European cohort. This study identified six common variants and five low frequency variants in the SORL1 coding sequence. However, none of these 11 variants was significantly associated with EOAD risk after adjusting for multiple testing. We consider whether these 11 SORL1 variants identified in European EOAD contribute to late-onset Alzheimer's disease (LOAD) risk in individuals of European ancestry...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527212/apolipoprotein-e4-gender-body-mass-index-inflammation-insulin-resistance-and-air-pollution-interactions-recipe-for-alzheimer-s-disease-development-in-mexico-city-young-females
#8
Lilian Calderón-Garcidueñas, Suzanne M de la Monte
Given the epidemiological trends of increasing Alzheimer's disease (AD) and growing evidence that exposure and lifestyle factors contribute to AD risk and pathogenesis, attention should be paid to variables such as air pollution, in order to reduce rates of cognitive decline and dementia. Exposure to fine particulate matter (PM2.5) and ozone (O3) above the US EPA standards is associated with AD risk. Mexico City children experienced pre- and postnatal high exposures to PM2.5, O3, combustion-derived iron-rich nanoparticles, metals, polycyclic aromatic hydrocarbons, and endotoxins...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527211/alzheimer-s-disease-in-the-latino-community-intersection-of-genetics-and-social-determinants-of-health
#9
Irving E Vega, Laura Y Cabrera, Cassandra M Wygant, Daniel Velez-Ortiz, Scott E Counts
Alzheimer's disease (AD) is the most common type of dementia among individuals 65 or older. There are more than 5 million diagnosed cases in the US alone and this number is expected to triple by 2050. Therefore, AD has reached epidemic proportions with significant socioeconomic implications. While aging in general is the greatest risk factor for AD, several additional demographic factors that have contributed to the rise in AD in the US are under study. One such factor is associated with the relatively fast growth of the Latino population...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527209/neuroimaging-and-its-relevance-to-understanding-pathways-linking-diabetes-and-cognitive-dysfunction
#10
Chris Moran, Richard Beare, Thanh Phan, Sergio Starkstein, David Bruce, Mizrahi Romina, Velandai Srikanth
Diabetes mellitus is associated with an elevated risk of cognitive impairment and dementia. Cerebrovascular disease and neurodegeneration are two major pathways that may explain the effect of diabetes on the brain and therefore deserve investigation. Neuroimaging provides an effective way to investigate the contribution of these pathways in vivo, guiding further mechanistic research and providing biomarkers for clinical correlation or interventional studies. In this paper, we present a narrative review of the state of play with neuroimaging evidence in studies of people with diabetes mellitus, how these data are useful in understanding mechanistic links between diabetes and brain impairment, and possible ways that the field may develop in the future...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527208/neuronal-expression-of-truncated-tau-efficiently-promotes-neurodegeneration-in-animal-models-pitfalls-of-toxic-oligomer-analysis
#11
Rostislav Skrabana, Branislav Kovacech, Peter Filipcik, Norbert Zilka, Santosh Jadhav, Tomas Smolek, Eva Kontsekova, Michal Novak
Animal models of neurodegeneration induced by neuronal expression of truncated tau protein emerge as an important tool for understanding the pathogenesis of human tauopathies and for therapy development. Here we highlight common features of truncated tau models and make a critical assessment of possible pitfalls in their analysis. Particularly, the amount of soluble tau oligomers, which are suspected to be neurotoxic agents participating on the spreading of pathology inside the brain, may be overestimated due to a post-lysis oxidative tau oligomerization...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527206/social-representation-of-dementia-an-analysis-of-5-792-consecutive-cases-evaluated-in-a-memory-clinic
#12
Pilar Cañabate, Gabriel Martínez, Maitée Rosende-Roca, Mariola Moreno, Silvia Preckler, Sergi Valero, Oscar Sotolongo, Isabel Hernández, Montserrat Alegret, Gemma Ortega, Ana Espinosa, Ana Mauleón, Liliana Vargas, Octavio Rodríguez, Carla Abdelnour, Domingo Sánchez, Elvira Martín, Agustín Ruiz, Lluís Tárraga, Mercè Boada
BACKGROUND: Different interpretations of cognitive impairment and dementia due to differences in health structures, such as cultural differences could affect the diagnosis and treatment of the condition. it is reasonable to expect that the social and family impact of the disease and coping strategies will differ among societies. OBJECTIVE: The general aim of this study is to understand the social representations of dementia, its associated practices, and the effects they imply...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527205/moderate-physical-activity-is-associated-with-cerebral-glucose-metabolism-in-adults-at-risk-for-alzheimer-s-disease
#13
Ryan J Dougherty, Stephanie A Schultz, Taylor K Kirby, Elizabeth A Boots, Jennifer M Oh, Dorothy Edwards, Catherine L Gallagher, Cynthia M Carlsson, Barbara B Bendlin, Sanjay Asthana, Mark A Sager, Bruce P Hermann, Bradley T Christian, Sterling C Johnson, Dane B Cook, Ozioma C Okonkwo
The objective of this study was to investigate the relationship between accelerometer-measured physical activity (PA) and glucose metabolism in asymptomatic late-middle-aged adults. Ninety-three cognitively healthy late-middle-aged adults from the Wisconsin Registry for Alzheimer's Prevention participated in this cross-sectional study. They underwent 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) imaging and wore an accelerometer (ActiGraph GT3X+) to measure free-living PA. Accelerometer data yielded measures of light (LPA), moderate (MPA), and vigorous (VPA) intensity PA...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527204/levetiracetam-alters-oscillatory-connectivity-in-alzheimer-s-disease
#14
Christian S Musaeus, Mouhsin M Shafi, Emiliano Santarnecchi, Susan T Herman, Daniel Z Press
Seizures occur at a higher frequency in people with Alzheimer's disease (AD) but overt, clinically obvious events are infrequent. Evidence from animal models and studies in mild cognitive impairment suggest that subclinical epileptic discharges may play a role in the clinical and pathophysiological manifestations of AD. In this feasibility study, the neurophysiological and cognitive effects of acute administration of levetiracetam (LEV) are measured in patients with mild AD to test whether it could have a therapeutic benefit...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527215/diagnostic-and-prognostic-value-of%C3%A2-the%C3%A2-combination-of-two-measures-of%C3%A2-verbal-memory-in-mild-cognitive-impairment-due%C3%A2-to-alzheimer-s-disease
#15
Isabel Sala, Ignacio Illán-Gala, Daniel Alcolea, Ma Belén Sánchez-Saudinós, Sergio Andrés Salgado, Estrella Morenas-Rodríguez, Andrea Subirana, Laura Videla, Jordi Clarimón, María Carmona-Iragui, Roser Ribosa-Nogué, Rafael Blesa, Juan Fortea, Alberto Lleó
BACKGROUND: Episodic memory impairment is the core feature of typical Alzheimer's disease. OBJECTIVE: To evaluate the performance of two commonly used verbal memory tests to detect mild cognitive impairment due to Alzheimer's disease (MCI-AD) and to predict progression to Alzheimer's disease dementia (AD-d). METHODS: Prospective study of MCI patients in a tertiary memory disorder unit. Patients underwent an extensive neuropsychological battery including two tests of declarative verbal memory: The Free and Cued Selective Reminding Test (FCSRT) and the word list learning task from the Consortium to Establish a Registry for Alzheimer's disease (CERAD-WL)...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527214/associations-of-spatial-disparities-of%C3%A2-alzheimer-s-disease-mortality-rates-and%C3%A2-soil-selenium-sulfur-concentrations-and-risk-factors-in-the-united-states
#16
Hongbing Sun
BACKGROUND: Associations between environmental factors and spatial disparity of mortality rates of Alzheimer's disease (AD) in the US are not well understood. OBJECTIVE: To find associations between 41 trace elements, four common risk factors, and AD mortality rates in the48 contiguous states. METHODS: Isopleth maps of AD mortality rates of the 48 states and associated factors were examined. Correlations between state average AD mortality rates and concentrations of 41 soil elements, wine consumption, percentage of current smokers, obesity, and diagnosed diabetes of the 48 states between 1999 and 2014 were analyzed...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527210/cerebrospinal-fluid-biomarkers-and-clinical-progression-in-patients-with-subjective-cognitive-decline-and-mild-cognitive-impairment
#17
Steffen Wolfsgruber, Alexandra Polcher, Alexander Koppara, Luca Kleineidam, Lutz Frölich, Oliver Peters, Michael Hüll, Eckart Rüther, Jens Wiltfang, Wolfgang Maier, Johannes Kornhuber, Piotr Lewczuk, Frank Jessen, Michael Wagner
BACKGROUND: There is very limited data on the prevalence of abnormal cerebrospinal fluid (CSF) biomarkers of Alzheimer's disease (AD) and their predictive value for clinical progression in memory clinic patients with subjective cognitive decline (SCD). OBJECTIVE: To assess the frequency of abnormal CSF biomarkers of AD and their predictive value for clinical progression in memory clinic patients with SCD in comparison to patients with mild cognitive impairment (MCI) from the same cohort...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527207/beyond-a-differential-diagnosis-cognitive-and-morphometric-decoding-of-information-processing-speed-in-senior-adults-with-dsm-5-mild-neurocognitive-disorders
#18
Hanna Lu, Sandra S M Chan, Ada W T Fung, Linda C W Lam
BACKGROUND: Processing speed has been highlighted as a diagnostic item for neurocognitive disorders (NCD) in DSM-5. The utility of information processing speed (IPS) enclosed with multiscale constructs in the diagnosis of NCD warrants exploration. OBJECTIVE: We aimed to investigate the IPS with two types of measurements in the patients with NCD due to vascular disease (NCD-vascular) and NCD due to Alzheimer's disease (NCD-AD), and examine the associations between IPS measures and morphometric features...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28505978/an-arabic-version-of-the-cognitive-subscale-of-the-alzheimer-s-disease-assessment-scale-adas-cog-reliability-validity-and-normative-data
#19
Sonia Ben Jemaa, Neila Attia Romdhane, Amel Bahri-Mrabet, Adel Jendli, Didier Le Gall, Tarek Bellaj
The Alzheimer's Disease Assessment Scale's cognitive subscale (ADAS-Cog) is the most widely used instrument for screening cognitive dysfunction in Alzheimer's disease. The aim of the present study was to develop an Arabic version of this scale (A-ADAS-Cog), examine its psychometric properties (reliability and validity), and provide normative data. The A-ADAS-Cog), an Arabic version of the Mini-Mental State Examination (A-MMSE), and a Standardized Clinical Dementia Rating Scale (CDR) were administered to three Tunisian groups: 124 normal controls (NC), 33 patients with non-Alzheimer dementia (N-AD), and 25 patients with Alzheimer's disease (AD)...
May 11, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28505975/reduced-cardiovascular-functions-in%C3%A2-patients-with-alzheimer-s-disease
#20
Wang-Sheng Jin, Xian-Le Bu, Ye-Ran Wang, Ling Li, Wei-Wei Li, Yu-Hui Liu, Chi Zhu, Xiu-Qing Yao, Yang Chen, Chang-Yue Gao, Tao Zhang, Chang-Yue Gao, Hua-Dong Zhou, Fan Zeng, Yan-Jiang Wang
Previous studies have suggested that cardiovascular functions might play a critical role in Alzheimer's disease (AD) pathogenesis. However, the relationship among heart function, blood flow of cerebral vessels, and AD remains unclear. In the present study, AD patients (n = 34) and age- and gender-matched cognitively normal controls (n = 34) were recruited. Comorbidity information was collected. The ejection fraction was measured using echocardiography, and the mean velocity, pulsatility index (PI), and resistance index (RI) of the basilar artery (BA), left terminal internal carotid artery (LTICA), and right terminal internal carotid artery (RTICA) were measured using transcranial Doppler...
May 11, 2017: Journal of Alzheimer's Disease: JAD
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