keyword
MENU ▼
Read by QxMD icon Read
search

Alzheimer apoe

keyword
https://www.readbyqxmd.com/read/29133888/neuronal-hyperactivity-due-to-loss-of-inhibitory-tone-in-apoe4-mice-lacking-alzheimer-s-disease-like-pathology
#1
Tal Nuriel, Sergio L Angulo, Usman Khan, Archana Ashok, Qiuying Chen, Helen Y Figueroa, Sheina Emrani, Li Liu, Mathieu Herman, Geoffrey Barrett, Valerie Savage, Luna Buitrago, Efrain Cepeda-Prado, Christine Fung, Eliana Goldberg, Steven S Gross, S Abid Hussaini, Herman Moreno, Scott A Small, Karen E Duff
The ε4 allele of apolipoprotein E (APOE) is the dominant genetic risk factor for late-onset Alzheimer's disease (AD). However, the reason APOE4 is associated with increased AD risk remains a source of debate. Neuronal hyperactivity is an early phenotype in both AD mouse models and in human AD, which may play a direct role in the pathogenesis of the disease. Here, we have identified an APOE4-associated hyperactivity phenotype in the brains of aged APOE mice using four complimentary techniques-fMRI, in vitro electrophysiology, in vivo electrophysiology, and metabolomics-with the most prominent hyperactivity occurring in the entorhinal cortex...
November 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29124110/characterization-of-apoe-and-tomm40-allele-frequencies-in-the-japanese-population
#2
Akira Nishimura, Hidenori Nonomura, Shingo Tanaka, Michihiro Yoshida, Yuka Maruyama, Yutaka Aritomi, Ann M Saunders, Daniel K Burns, Michael W Lutz, Grant Runyan, Eric Lai, Kumar Budur, Allen D Roses
Introduction: Dementia is one of the major health threats to our aging society, and Alzheimer's disease (AD) is the leading cause. In Japan, ∼15% of the elderly population has dementia. The apolipoprotein E (APOE) genotype and a polymorphism (rs10524523) in the translocase of outer mitochondrial membrane 40 (TOMM40) gene have been associated with the age of onset of AD. However, differences in allele frequencies of these markers in different ethnic populations are not well known. Methods: Whole blood samples were collected from 300 Japanese subjects, and genomic DNA was extracted to determine APOE alleles and TOMM40 rs10524523 genotypes...
November 2017: Alzheimer's & Dementia: Translational Research & Clinical Interventions
https://www.readbyqxmd.com/read/29114370/taming-alzheimer-s-disease-new-perspectives-newer-horizons
#3
REVIEW
Debraj Sen, Anusree Majumder, Vijinder Arora, Neha Yadu, Ritwik Chakrabarti
Alzheimer's disease (AD) is the leading cause of dementia. However, current therapies do not prevent progression of the disease. New research into the pathogenesis of the disease has brought about a greater understanding of the "amyloid cascade" and associated receptor abnormalities, the role of genetic factors, and revealed that the disease process commences 10 to 20 years prior to the appearance of clinical signs. This greater understanding of the disease has prompted development of novel disease-modifying therapies (DMTs) which may prevent onset or delay progression of the disease...
July 6, 2017: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/29111487/cortical-%C3%AE-amyloid-burden-gray-matter-and-memory-in-adults-at-varying-apoe-%C3%AE%C2%B54-risk-for-alzheimer-s-disease
#4
Adam P Mecca, Nicole M Barcelos, Shuo Wang, Anna Brück, Nabeel Nabulsi, Beata Planeta-Wilson, Jennifer Nadelmann, Amanda L Benincasa, Jim Ropchan, Yiyun Huang, Joel Gelernter, Peter H Van Ness, Richard E Carson, Christopher H van Dyck
Models of preclinical Alzheimer's disease (AD) propose that cerebral amyloidosis leads to neurodegeneration and subsequent cognitive decline. This study investigated whether APOE genotype is related to β-amyloid (Aβ) burden in brain regions preferentially affected by AD and whether Aβ burden is associated with gray-matter (GM) fraction (as a marker of neurodegeneration) and episodic memory performance in cognitively normal middle-aged individuals at varying genetic risk for AD. Three groups of cognitively normal participants aged 50-65 years with a first-degree family history of AD (APOE genotype ε4ε4 [n = 15], ε3ε4 [n = 15], and ε3ε3 [n = 15]) underwent [(11)C]PiB positron emission tomography scans to quantify cortical Aβ, brain magnetic resonance imaging, and neuropsychological testing...
October 6, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29111133/in-vivo-brain-plaque-and-tangle-burden-mediates-the-association-between-diastolic-blood-pressure-and-cognitive-functioning-in-nondemented-adults
#5
Florence F Roussotte, Prabha Siddarth, David A Merrill, Katherine L Narr, Linda M Ercoli, Jacqueline Martinez, Natacha D Emerson, Jorge R Barrio, Gary W Small
OBJECTIVE: Growing evidence supports an association between increased blood pressure and: (a) poor cognitive performance in older adults, and (b) various biomarkers of increased Alzheimer's disease (AD) neuropathology. The objective of this study was to determine whether systolic blood pressure (SBP) and diastolic blood pressure (DBP) were significantly associated with cognitive functioning in non-demented adults, and to examine in vivo AD pathology as a possible mediator of this association...
September 15, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/29107844/the-mechanisms-underlying-olfactory-deficits-in-apolipoprotein-e-deficient-mice-focus-on-olfactory-epithelium-and-olfactory-bulb
#6
Jiajia Zhang, Caiyuan Hao, Jinxiang Jiang, Yangjian Feng, Xi Chen, Ying Zheng, Jiawei Liu, Zhilin Zhang, Cheng Long, Li Yang
Apolipoprotein E (ApoE) is highly expressed in the central nervous system including the olfactory epithelium (OE) and olfactory bulb (OB). ApoE induction is beneficial for Alzheimer's disease (AD) treatment, whereas ApoE deficiency results in impaired olfaction, but the timing and underlying molecular and cellular mechanisms of these effects remain unclear. Uncovering the mechanisms underlying olfactory dysfunction in ApoE-deficient mice might provide a potential avenue for the early diagnosis of AD. We used an ApoE knockout (ApoE(-/-)) mouse model and a cookie-finding test to reveal an olfactory deficit in 3- to 5-month-old, but not 1- to 2-month-old, ApoE(-/-) mice...
October 10, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29107063/hidden-heterogeneity-in-alzheimer-s-disease-insights-from-genetic-association-studies-and-other-analyses
#7
Anatoliy I Yashin, Fang Fang, Mikhail Kovtun, Deqing Wu, Matt Duan, Konstantin Arbeev, Igor Akushevich, Alexander Kulminski, Irina Culminskaya, Ilya Zhbannikov, Arseniy Yashkin, Eric Stallard, Svetlana Ukraintseva
Despite evident success in clarifying many important features of Alzheimer's disease (AD) the efficient methods of its prevention and treatment are not yet available. The reasons are likely to be the fact that AD is a multifactorial and heterogeneous health disorder with multiple alternative pathways of disease development and progression. The availability of genetic data on individuals participated in longitudinal studies of aging health and longevity, as well as on participants of cross-sectional case-control studies allow for investigating genetic and non-genetic connections with AD and to link the results of these analyses with research findings obtained in clinical, experimental, and molecular biological studies of this health disorder...
October 26, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29103623/polygenic-risk-score-in-postmortem-diagnosed-sporadic-early-onset-alzheimer-s-disease
#8
Sultan Chaudhury, Tulsi Patel, Imelda S Barber, Tamar Guetta-Baranes, Keeley J Brookes, Sally Chappell, James Turton, Rita Guerreiro, Jose Bras, Dena Hernandez, Andrew Singleton, John Hardy, David Mann, Kevin Morgan
Sporadic early-onset Alzheimer's disease (sEOAD) exhibits the symptoms of late-onset Alzheimer's disease but lacks the familial aspect of the early-onset familial form. The genetics of Alzheimer's disease (AD) identifies APOEε4 to be the greatest risk factor; however, it is a complex disease involving both environmental risk factors and multiple genetic loci. Polygenic risk scores (PRSs) accumulate the total risk of a phenotype in an individual based on variants present in their genome. We determined whether sEOAD cases had a higher PRS compared to controls...
October 10, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29100334/paradoxical-effects-of-137-cs-irradiation-on-pharmacological-stimulation-of-reactive-oxygen-species-in-hippocampal-slices-from-apoe2-and-apoe4-mice
#9
Laura E Villasana, Tunde Akinyeke, Sydney Weber, Jacob Raber
In humans, apoE, which plays a role in repair, is expressed in three isoforms: E2, E3, and E4. E4 is a risk factor for age-related cognitive decline (ACD) and Alzheimer's disease (AD), particularly in women. In contrast, E2 is a protective factor for ACD and AD. E2 and E4 might also differ in their response to cranial (137)Cs irradiation, a form of radiation typically used in a clinical setting for the treatment of cancer. This might be mediated by reactive oxygen species (ROS) in an-apoE isoform-dependent fashion...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29099594/inhibition-of-%C3%AE-amyloid-channels-with-a-drug-candidate-wgx-50-revealed-by-molecular-dynamics-simulations
#10
Shuang Hou, Ruo-Xu Gu, Dong-Qing Wei
Destabilization of cellular ionic homeostasis by toxic β-amyloid (Aβ) channels/barrels, which is a pathogenic mechanism for Alzheimer's disease (AD), is inhibited by a novel anti-AD drug candidate wgx-50 significantly in our previous biological experiments. In this work, molecular dynamics simulations are conducted to investigate wgx-50-Aβ channels/barrels interactions, as well as the ion conductance inhibition mechanism. Ion influx from the extracellular side to the central pore, which is found in apo-form simulations, is blocked by wgx-50 ligands that bind to the hydrophobic rings at the entrance of the channels/barrels...
November 15, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29091778/risk-factors-for-amyloid-positivity-in-older-people-reporting-significant-memory-concern
#11
Jie Zhang, Wenjun Zhou, Ryan M Cassidy, Hang Su, Yindan Su, Xiangyang Zhang
OBJECTIVE: The goal of this study is to identify risk factors for the presence of amyloid accumulation in the brains of patients reporting subjective cognitive decline (SCD). Identifying such risk factors will help better identify patients who ought to receive neuroimaging studies to confirm plaque presence and begin intervention, as well as enhancing the study of the pathogenesis of Alzheimer's disease. METHODS: Ninety-nine SCD participants (72.2±5.6years, 57...
October 6, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/29082658/cognitive-impairment-in-progressive-supranuclear-palsy-is-associated-with-tau-burden
#12
Shunsuke Koga, Adam Parks, Koji Kasanuki, Monica Sanchez-Contreras, Matthew C Baker, Keith A Josephs, J Eric Ahlskog, Ryan J Uitti, Neill Graff-Radford, Jay A van Gerpen, Zbigniew K Wszolek, Rosa Rademakers, Dennis W Dickson
BACKGROUND: Cognitive impairment is one of the core features of progressive supranuclear palsy. This study aimed to clarify the profile of cognitive impairment and its underlying pathology in progressive supranuclear palsy. METHODS: We retrospectively reviewed medical records to evaluate the pattern and severity of cognitive impairment in 121 autopsy-confirmed progressive supranuclear palsy patients. A subset of 37 patients underwent neuropsychological evaluation as part of their clinical workup...
October 30, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29081745/changes-of-functional-and-directed-resting-state-connectivity-are-associated-with-neuronal-oscillations-apoe-genotype-and-amyloid-deposition-in-mild-cognitive-impairment
#13
Lars Michels, Muthuraman Muthuraman, Abdul R Anwar, Spyros Kollias, Sandra E Leh, Florian Riese, Paul G Unschuld, Michael Siniatchkin, Anton F Gietl, Christoph Hock
The assessment of effects associated with cognitive impairment using electroencephalography (EEG) power mapping allows the visualization of frequency-band specific local changes in oscillatory activity. In contrast, measures of coherence and dynamic source synchronization allow for the study of functional and effective connectivity, respectively. Yet, these measures have rarely been assessed in parallel in the context of mild cognitive impairment (MCI) and furthermore it has not been examined if they are related to risk factors of Alzheimer's disease (AD) such as amyloid deposition and apolipoprotein ε4 (ApoE) allele occurrence...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29081698/population-based-study-of-risk-polymorphisms-associated-with-vascular-disorders-and-dementia
#14
Óscar Teijido, Juan Carlos Carril, Ramón Cacabelos
INTRODUCTION: Cardiovascular and neurodegenerative disorders are among the major causes of mortality in the developed countries. Population studies evaluate the genetic risk, i.e. the probability of an individual carrying a specific disease-associated polymorphism. Identification of risk polymorphisms is essential for an accurate diagnosis or prognosis of a number of pathologies. AIMS: The aim of this study was to characterize the influence of risk polymorphisms associated with lipid metabolism, hypertension, thrombosis, and dementia, in a large population of Spanish individuals affected by a variety of brain and vascular disorders as well as metabolic syndrome...
October 2017: Current Genomics
https://www.readbyqxmd.com/read/29081417/change-in-odor-identification-impairment-is-associated-with-improvement-with%C3%A2-cholinesterase-inhibitor-treatment-in%C3%A2-mild-cognitive-impairment
#15
D P Devanand, Cody Lentz, Richard E Chunga, Adam Ciarleglio, Jennifer M Scodes, Howard Andrews, Peter W Schofield, Yaakov Stern, Edward D Huey, Karen Bell, Gregory H Pelton
BACKGROUND: Anticholinergic challenge can induce odor identification impairment that indicates Alzheimer's disease pathology. OBJECTIVE: To determine if decline in odor identification ability with anticholinergic challenge can predict improvement with donepezil, a cholinesterase inhibitor (ChEI), in patients with mild cognitive impairment (MCI). METHODS: At baseline, the University of Pennsylvania Smell identification Test (UPSIT) was administered before and after an anticholinergic atropine nasal spray challenge...
October 21, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29072550/association-of-glutathione-s-transferases-m1-p1-and-t1-variations-and-risk-of-late-onset-alzheimer-s-disease
#16
Zahra Jafarian, Kioomars Saliminejad, Koorosh Kamali, Mina Ohadi, Ali Kowsari, Leila Nasehi, Hamid Reza Khorram Khorshid
OBJECTIVE: Late-onset Alzheimer's disease (AD) is a genetically heterogeneous neurodegenerative disorder. Associations of the glutathione S-transferases (GSTs) polymorphisms with the risk factors for AD have not been definitely confirmed. We investigated the association of GSTM1 and GSTT1 null deletion and GSTP1 313 A/G polymorphisms and the risk of AD in an Iranian population. METHODS: The case group consisted of 280 individuals with AD and the control group included 168 age-matched healthy individuals...
October 26, 2017: Neurological Research
https://www.readbyqxmd.com/read/29070909/a-blood-based-biomarker-panel-indicates-il-10-and-il-12-23p40-are-jointly-associated-as-predictors-of-%C3%AE-amyloid-load-in-an-ad-cohort
#17
Steve Pedrini, Veer B Gupta, Eugene Hone, James Doecke, Sid O'Bryant, Ian James, Ashley I Bush, Christopher C Rowe, Victor L Villemagne, David Ames, Colin L Masters, Ralph N Martins
Alzheimer's Disease (AD) is the most common form of dementia, characterised by extracellular amyloid deposition as plaques and intracellular neurofibrillary tangles of tau protein. As no current clinical test can diagnose individuals at risk of developing AD, the aim of this project is to evaluate a blood-based biomarker panel to identify individuals who carry this risk. We analysed the levels of 22 biomarkers in clinically classified healthy controls (HC), mild cognitive impairment (MCI) and Alzheimer's participants from the well characterised Australian Imaging, Biomarker and Lifestyle (AIBL) study of aging...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29070790/pattern-discovery-in-brain-imaging-genetics-via-scca-modeling-with-a-generic-non-convex-penalty
#18
Lei Du, Kefei Liu, Xiaohui Yao, Jingwen Yan, Shannon L Risacher, Junwei Han, Lei Guo, Andrew J Saykin, Li Shen
Brain imaging genetics intends to uncover associations between genetic markers and neuroimaging quantitative traits. Sparse canonical correlation analysis (SCCA) can discover bi-multivariate associations and select relevant features, and is becoming popular in imaging genetic studies. The L1-norm function is not only convex, but also singular at the origin, which is a necessary condition for sparsity. Thus most SCCA methods impose [Formula: see text]-norm onto the individual feature or the structure level of features to pursuit corresponding sparsity...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29067322/the-prevalence-and-biomarkers-characteristic-of-rapidly-progressive-alzheimer-s-disease-from-the-alzheimer-s-disease-neuroimaging-initiative-database
#19
Maowen Ba, Xiaofeng Li, Kok Pin Ng, Tharick A Pascoal, Sulantha Mathotaarachchi, Pedro Rosa-Neto, Serge Gauthier
INTRODUCTION: The prevalence and detailed biomarkers' characteristic of rapidly progressive Alzheimer's disease (rpAD) remain incompletely understood. METHODS: A total of 312 mild AD patients from the Alzheimer's Disease Neuroimaging Initiative database were chosen and dichotomized into rpAD and non-rpAD groups. We performed the prevalence and comprehensive biomarker evaluation. RESULTS: The prevalence of rpAD was 17.6% in mild AD. Compared with non-rpAD, there were no differences in APOE ε4/ε4, APOE ε3/ε4, and APOE ε2/ε4 genotype distribution, cerebrospinal fluid tau, phosphorylated tau (p-tau), amyloid-β, hippocampus volume, and amyloid deposition in rpAD...
January 2017: Alzheimer's & Dementia: Translational Research & Clinical Interventions
https://www.readbyqxmd.com/read/29066899/sex-differences-in-obesity-and-cognitive-function-in-a-cognitively-normal-aging-chinese-han-population
#20
Wei Li, Qi Qiu, Lin Sun, Ling Yue, Tao Wang, Xia Li, Shifu Xiao
BACKGROUND: Sex differences in Alzheimer's disease and mild cognitive impairment have been well recognized. However, sex differences in cognitive function and obesity in cognitively normal aging Chinese Han population have not attracted much attention. OBJECTIVE: The aim of this study was to investigate the relationship between sex, obesity, and cognitive function in an elderly Chinese population with normal cognitive function. SUBJECTS AND METHODS: A total of 228 cognitively normal aging participants (males/females =93/135) entered this study...
2017: Neuropsychiatric Disease and Treatment
keyword
keyword
36392
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"