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Journal of Alzheimer's Disease: JAD

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https://www.readbyqxmd.com/read/29782326/increased-albumin-oxidation-in-cerebrospinal-fluid-and-plasma-from-alzheimer-s-disease-patients
#1
Montserrat Costa, Raquel Horrillo, Ana María Ortiz, Alba Pérez, Anna Mestre, Agustín Ruiz, Mercè Boada, Salvador Grancha
BACKGROUND: Oxidative stress in the brain and peripheral systems is considered a major player in Alzheimer's disease (AD). Albumin is the main transporter and the main extracellular antioxidant in the human body. OBJECTIVE: Here we explore for the first time the oxidation status of cerebrospinal fluid (CSF) and plasma albumin in AD in comparison to healthy subjects. METHODS: Plasma and CSF samples were obtained from mild-moderate AD patients and control healthy age-matched donors...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782325/early-emotional-attention-is-impacted-in-alzheimer-s-disease-an-eye-tracking-study
#2
Jessica Bourgin, Nathalie Guyader, Alan Chauvin, Alexandra Juphard, Mathilde Sauvée, Olivier Moreaud, Laetitia Silvert, Pascal Hot
Emotional deficits have been repetitively reported in Alzheimer's disease (AD) without clearly identifying how emotional processing is impaired in this pathology. This paper describes an investigation of early emotional processing, as measured by the effects of emotional visual stimuli on a saccadic task involving both pro (PS) and anti (AS) saccades. Sixteen patients with AD and 25 age-matched healthy controls were eye-tracked while they had to quickly move their gaze toward a positive, negative, or neutral image presented on a computer screen (in the PS condition) or away from the image (in the AS condition)...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782324/meta-analysis-of-the-association-between-variants-in-abca7-and-alzheimer-s-disease
#3
Fang-Chen Ma, Hui-Fu Wang, Xi-Peng Cao, Chen-Chen Tan, Lan Tan, Jin-Tai Yu
The ATP-binding cassette transporter A7 (ABCA7) was identified as a known risk factor for Alzheimer's disease (AD). However, the relation between ABCA7 and AD was still inconsistent across these studies. Here, our meta-analysis aimed at confirming the association of ABCA7 with AD. Finally, 16 case-control studies (63747 versus 85833) were retrieved from PubMed and other databases. Three common loci were confirmed to increase the risk of AD (rs3764650: OR = 1.20, 95% CI = 1.16-1.24; rs3752246: OR = 1...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782323/role-of-blood-brain-barrier-in-alzheimer-s-disease
#4
Zhiyou Cai, Pei-Feng Qiao, Cheng-Qun Wan, Min Cai, Nan-Kai Zhou, Qin Li
The blood-brain barrier (BBB) is involved in the pathogenesis of Alzheimer's disease (AD). BBB is a highly selective semipermeable structural and chemical barrier which ensures a stable internal environment of the brain and prevents foreign objects invading the brain tissue. BBB dysfunction induces the failure of Aβ transport from brain to the peripheral circulation across the BBB. Especially, decreased levels of LRP-1 (low density lipoprotein receptor-related protein 1) and increased levels of RAGE (receptor for advanced glycation endproducts) at the BBB can cause the failure of Aβ transport...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782322/inhibition-of-histone-acetylation-by-anp32a-induces-memory-deficits
#5
Gao-Shang Chai, Qiong Feng, Rong-Hong Ma, Xiao-Hang Qian, Dan-Ju Luo, Zhi-Hao Wang, Yu Hu, Dong-Sheng Sun, Jun-Fei Zhang, Xiao Li, Xiao-Guang Li, Dan Ke, Jian-Zhi Wang, Xi-Fei Yang, Gong-Ping Liu
There is accumulating evidence that decreased histone acetylation is involved in normal aging and neurodegenerative diseases. Recently, we found that ANP32A, a key component of INHAT (inhibitor of acetyltransferases) that suppresses histone acetylation, increased in aged and cognitively impaired C57 mice and expressing wild-type human full length tau (htau) transgenic mice. Downregulating ANP32A restored cognitive function and synaptic plasticity through upregulation of the expressions of synaptic-related proteins via increasing histone acetylation...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782321/pyk2-is-a-novel-tau-tyrosine-kinase-that-is-regulated-by-the-tyrosine-kinase-fyn
#6
Chuanzhou Li, Jürgen Götz
The protein tyrosine kinase Pyk2 is encoded by PTK2B, a novel Alzheimer's disease (AD) susceptibility variant, with the PTK2B risk allele being associated with increased mRNA levels, suggestive of increased Pyk2 levels. However, the role of Pyk2, a member of the focal adhesion kinase (FAK) family, in AD pathology and its regulation are largely unknown. To address this, we generated mice with neuronal expression of human Pyk2. Because we had previously reported an association of Pyk2 and hyperphosphorylated tau (a hallmark feature of AD) in human tau transgenic pR5 mice, we also generated Pyk2/tau double-transgenic mice, which exhibit increased tyrosine phosphorylation and accumulation of tau...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782320/preface
#7
George Perry, Jesús Avila, Paula I Moreira, Aaron A Sorensen, Massimo Tabaton
No abstract text is available yet for this article.
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782319/the-relationship-between-obstructive-sleep-apnea-and-alzheimer-s-disease
#8
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/29782318/amyloid-accumulation-and-cognitive-decline-in-clinically-normal-older-individuals-implications-for-aging-and-early-alzheimer-s-disease
#9
Elizabeth C Mormino, Kathryn V Papp
 The aberrant accumulation of the amyloid protein is a critical and early event in the Alzheimer's disease (AD) cascade. Given the early involvement of this pathological process, it is not surprising that many clinically normal (CN) older individuals demonstrate evidence of abnormal Aβ at postmortem examination and in vivo using either CSF or PET imaging. Converging evidence across multiple research groups suggests that the presence of abnormal Aβ among CN individuals is associated with elevated risk of future clinical impairment and cognitive decline...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782317/dementia-research-populations-progress-problems-and-predictions
#10
Sally Hunter, Nadja Smailagic, Carol Brayne
Alzheimer's disease (AD) is a clinicopathologically defined syndrome leading to cognitive impairment. Following the recent failures of amyloid-based randomized controlled trials to change the course of AD, there are growing calls for a re-evaluation of basic AD research. Epidemiology offers one approach to integrating the available evidence. Here we examine relationships between evidence from population-based, clinicopathological studies of brain aging and a range of hypotheses from all areas of AD 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
#11
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/29782315/tlr4-gene-expression-and-pro-inflammatory-cytokines-in-alzheimer-s-disease-and-in-response-to-hippocampal-deafferentation-in-rodents
#12
Justin Miron, Cynthia Picard, Josée Frappier, Doris Dea, Louise Théroux, Judes Poirier
One important aspect in Alzheimer's disease pathology is the presence of chronic inflammation. Considering its role as a key receptor in the microglial innate immune system, TLR4 was shown to regulate the binding and phagocytosis of amyloid plaques by microglia in several mouse models of amyloidosis, as well as the production of pro-inflammatory cytokines. To our knowledge, TLR4 and its association with cytokines have not been thoroughly examined in the brains of subjects affected with Alzheimer's disease. Using quantitative reverse transcription polymerase chain reaction (qRT-PCR) in postmortem human brains, we observed increased expression for the TLR4 and TNF genes (p = 0...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782314/a-retrospective-belgian-multi-center-mri-biomarker-study-in-alzheimer-s-disease-remember
#13
Ellis Niemantsverdriet, Annemie Ribbens, Christine Bastin, Florence Benoit, Bruno Bergmans, Jean-Christophe Bier, Roxanne Bladt, Lene Claes, Peter Paul De Deyn, Olivier Deryck, Bernard Hanseeuw, Adrian Ivanoiu, Jean-Claude Lemper, Eric Mormont, Gaëtane Picard, Eric Salmon, Kurt Segers, Anne Sieben, Dirk Smeets, Hanne Struyfs, Evert Thiery, Jos Tournoy, Eric Triau, Anne-Marie Vanbinst, Jan Versijpt, Maria Bjerke, Sebastiaan Engelborghs
BACKGROUND: Magnetic resonance imaging (MRI) acquisition/processing techniques assess brain volumes to explore neurodegeneration in Alzheimer's disease (AD). OBJECTIVE: We examined the clinical utility of MSmetrix and investigated if automated MRI volumes could discriminate between groups covering the AD continuum and could be used as a predictor for clinical progression. METHODS: The Belgian Dementia Council initiated a retrospective, multi-center study and analyzed whole brain (WB), grey matter (GM), white matter (WM), cerebrospinal fluid (CSF), cortical GM (CGM) volumes, and WM hyperintensities (WMH) using MSmetrix in the AD continuum...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782313/kainic-acid-impairs-the-memory-behavior-of-app23-mice-by-increasing-brain-amyloid-load-through-a-tumor-necrosis-factor-%C3%AE-dependent-mechanism
#14
Yang Ruan, Shi-Jie Guo, Xu Wang, Dong Dong, Dong-Hui Shen, Jie Zhu, Xiang-Yu Zheng
Kainic acid (KA) was recently identified as an epileptogenic and neuroexcitotoxic agent that is responsible for inducing learning and memory deficits in various neurodegenerative diseases, such as Alzheimer's disease (AD). However, the mechanism by which KA acts upon AD remains unclear. To this end, we presently investigated the roles of KA in processing amyloid-β protein precursor (AβPP) and amyloid-β protein (Aβ) loads during the course of AD development and progression. Specifically, KA treatment clearly caused the upregulation of tumor necrosis factor α (TNF-α) via activation of the PI3-K/AKT, ERK1/2, and p65 pathways in glial cells...
May 16, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29782312/naturalistic-driving-study-investigating-self-regulation-behavior-in-early-alzheimer-s-disease-a-pilot-study
#15
Laurence Paire-Ficout, Sylviane Lafont, Fanny Conte, Amandine Coquillat, Colette Fabrigoule, Joël Ankri, Frédéric Blanc, Cécilia Gabel, Jean-Luc Novella, Isabella Morrone, Rachid Mahmoudi
BACKGROUND: Because cognitive processes decline in the earliest stages of Alzheimer's disease (AD), the driving abilities are often affected. The naturalistic driving approach is relevant to study the driving habits and behaviors in normal or critical situations in a familiar environment of participants. OBJECTIVE: This pilot study analyzed in-car video recordings of naturalistic driving in patients with early-stage AD and in healthy controls, with a special focus on tactical self-regulation behavior...
May 16, 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
#16
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/29782311/the-independent-associations-of-physical-activity-and-sleep-with-cognitive-function-in-older-adults
#17
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/29758947/phenomenological-characteristics-of-future-thinking-in-alzheimer-s-disease
#18
Ahmed A Moustafa, Mohamad El Haj
This study investigates phenomenological reliving of future thinking in Alzheimer's disease (AD) patients and matched controls. All participants were asked to imagine in detail a future event, and afterward, were asked to rate phenomenological characteristics of their future thinking. As compared to controls, AD participants showed poor rating for reliving, travel in time, visual imagery, auditory imagery, language, and spatiotemporal specificity. However, no significant differences were observed between both groups in emotion and importance of future thinking...
May 11, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29758946/gut-microbiome-is-altered-in-patients-with-alzheimer-s-disease
#19
Zhen-Qian Zhuang, Lin-Lin Shen, Wei-Wei Li, Xue Fu, Fan Zeng, Li Gui, Yang Lü, Min Cai, Chi Zhu, Yin-Ling Tan, Peng Zheng, Hui-Yun Li, Jie Zhu, Hua-Dong Zhou, Xian-Le Bu, Yan-Jiang Wang
Previous studies suggest that gut microbiota is associated with neuropsychiatric disorders, such as Parkinson's disease, amyotrophic lateral sclerosis, and depression. However, whether the composition and diversity of gut microbiota is altered in patients with Alzheimer's disease (AD) remain largely unknown. In the present study, we collected fecal samples from 43 AD patients and 43 age- and gender-matched cognitively normal controls. 16S ribosomal RNA sequencing technique was used to analyze the microbiota composition in feces...
May 11, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29758945/a-10-year-follow-up-of-adiposity-and-dementia-in-swedish-adults-aged-70-years-and-older
#20
Ilse A C Arnoldussen, Valter Sundh, Kristoffer Bäckman, Silke Kern, Svante Östling, Kaj Blennow, Henrik Zetterberg, Ingmar Skoog, Amanda J Kiliaan, Deborah R Gustafson
BACKGROUND: Adiposity measured in mid- or late-life and estimated using anthropometric measures such as body mass index (BMI) and waist-to-hip ratio (WHR), or metabolic markers such as blood leptin and adiponectin levels, is associated with late-onset dementia risk. However, during later life, this association may reverse and aging- and dementia-related processes may differentially affect adiposity measures. OBJECTIVE: We explored associations of concurrent BMI, WHR, and blood leptin and high molecular weight adiponectin levels with dementia occurrence...
May 11, 2018: Journal of Alzheimer's Disease: JAD
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