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Alzheimer apoe

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https://www.readbyqxmd.com/read/29770843/patterns-and-severity-of-vascular-amyloid-in-alzheimer-s-disease-associated-with-duplications-and-missense-mutations-in-app-gene-down-syndrome-and-sporadic-alzheimer-s-disease
#1
David M A Mann, Yvonne S Davidson, Andrew C Robinson, Nancy Allen, Tadafumi Hashimoto, Anna Richardson, Matthew Jones, Julie S Snowden, Neil Pendleton, Marie-Claude Potier, Annie Laquerrière, Vee Prasher, Takeshi Iwatsubo, Andre Strydom
In this study, we have compared the severity of amyloid plaque formation and cerebral amyloid angiopathy (CAA), and the subtype pattern of CAA pathology itself, between APP genetic causes of AD (APPdup, APP mutations), older individuals with Down syndrome (DS) showing the pathology of Alzheimer's disease (AD) and individuals with sporadic (early and late onset) AD (sEOAD and sLOAD, respectively). The aim of this was to elucidate important group differences and to provide mechanistic insights related to clinical and neuropathological phenotypes...
May 16, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29770778/apolipoprotein-e-in-diet-induced-obesity-a-paradigm-shift-from-conventional-perception
#2
Kyriakos E Kypreos, Eleni A Karavia, Caterina Constantinou, Aikaterini Hatziri, Christina Kalogeropoulou, Eva Xepapadaki, Evangelia Zvintzou
Apolipoprotein E (APOE) is a major protein component of peripheral and brain lipoprotein transport systems. APOE in peripheral circulation does not cross blood brain barrier or blood cerebrospinal fluid barrier. As a result, peripheral APOE expression does not affect brain APOE levels and vice versa. Numerous epidemiological studies suggest a key role of peripherally expressed APOE in the development and progression of coronary heart disease while brain APOE has been associated with dementia and Alzheimer's disease...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29769839/a-novel-association-of-polymorphism-in-the-itga4-gene-encoding-the-vla-4-%C3%AE-4-subunit-with-increased-risk-of-alzheimer-s-disease
#3
Vladimira Durmanova, Zuzana Parnicka, Juraj Javor, Gabriel Minarik, Lubomir Vrazda, Barbora Vaseckova, Karin Gmitterova, Maria Kralova, Jan Pecenak, Peter Filipcik, Ivana Shawkatova
Alzheimer's disease (AD) is the most prevalent cause of dementia in elderly people worldwide. Many studies support the hypothesis that the inflammation of the CNS contributes to the neurodegeneration and disease progression. The integrin molecule α 4 β 1, also known as very late antigen 4 (VLA-4), belongs to adhesion molecules that activate the inflammatory process through the migration of immune cells into the CNS. Therefore, the objective of our study was to analyze the association between two polymorphisms located in the ITGA4 gene encoding the α 4 subunit of VLA-4 and the risk of AD...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29761124/progranulin-levels-in-blood-in-alzheimer-s-disease-and-mild-cognitive-impairment
#4
Yonatan A Cooper, Daniel Nachun, Deepika Dokuru, Zhongan Yang, Anna M Karydas, Ginette Serrero, Binbin Yue, Adam L Boxer, Bruce L Miller, Giovanni Coppola
Objective: Changes in progranulin ( GRN ) expression have been hypothesized to alter risk for Alzheimer's disease (AD). We investigated the relationship between GRN expression in peripheral blood and clinical diagnosis of AD and mild cognitive impairment (MCI). Methods: Peripheral blood progranulin gene expression was measured, using microarrays from Alzheimer's ( n = 186), MCI ( n = 118), and control ( n = 204) subjects from the University of California San Francisco Memory and Aging Center (UCSF-MAC) and two independent published series (AddNeuroMed and ADNI)...
May 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29760643/combining-polygenic-hazard-score-with-volumetric-mri-and-cognitive-measures-improves-prediction-of-progression-from-mild-cognitive-impairment-to-alzheimer-s-disease
#5
Karolina Kauppi, Chun Chieh Fan, Linda K McEvoy, Dominic Holland, Chin Hong Tan, Chi-Hua Chen, Ole A Andreassen, Rahul S Desikan, Anders M Dale
Improved prediction of progression to Alzheimer's Disease (AD) among older individuals with mild cognitive impairment (MCI) is of high clinical and societal importance. We recently developed a polygenic hazard score (PHS) that predicted age of AD onset above and beyond APOE . Here, we used data from the Alzheimer's Disease Neuroimaging Initiative (ADNI) to further explore the potential clinical utility of PHS for predicting AD development in older adults with MCI. We examined the predictive value of PHS alone and in combination with baseline structural magnetic resonance imaging (MRI) data on performance on the Mini-Mental State Exam (MMSE)...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29758948/argyrophilic-grain-pathology-in-frontotemporal-lobar-degeneration-demographic-clinical-neuropathological-and-genetic-features
#6
María José Gil, María Sagrario Manzano, María Luz Cuadrado, Cristina Fernández, Elena Góméz, Carmen Matesanz, Miguel Calero, Alberto Rábano
Frontotemporal lobar degeneration (FTLD) is a clinically, pathologically, and genetically heterogeneous group of disorders that affect the frontal and temporal lobes of the brain. FTLD classification distinguishes three main neuropathological groups: FTLD-tau, FTLD-TDP, and FTLD-FUS. As a four-repeat tauopathy, argyrophilic grain disease (AGD) is included in the FTLD-tau group. AGD may also appear in association with other neuropathological disorders. We describe the demographic, clinical, neuropathological, and genetic characteristics of a series of FTLD cases presenting with AGD...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29758939/higher-blood-vitamin-c-levels-are-associated-with-reduction-of-apolipoprotein-e-e4-related-risks-of-cognitive-decline-in-women-the-nakajima-study
#7
Moeko Noguchi-Shinohara, Chiemi Abe, Sohshi Yuki-Nozaki, Chiaki Dohmoto, Ayaka Mori, Koji Hayashi, Syutaro Shibata, Yoshihisa Ikeda, Kenji Sakai, Kazuo Iwasa, Masami Yokogawa, Mai Ishimiya, Hiroyuki Nakamura, Hidehiro Yokoji, Kiyonobu Komai, Hiroyuki Nakamura, Masahito Yamada
BACKGROUND: Antioxidants like vitamins C and E may minimize the risk for Alzheimer's disease. OBJECTIVE: We examined whether vitamins C and E modify the apolipoprotein E (APOE) E4-related risks for developing cognitive decline. METHODS: We conducted a population-based prospective study including Japanese residents aged 65 years from Nakajima, Japan. The participants received an evaluation of cognitive function and underwent blood tests including tests for vitamins C and E levels and APOE phenotypes...
May 11, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29756163/diagnostic-utility-of-18f-fluorodeoxyglucose-positron-emission-tomography-fdg-pet-in-asymptomatic-subjects-at-increased-risk-for-alzheimer-s-disease
#8
REVIEW
Alexander Drzezga, Daniele Altomare, Cristina Festari, Javier Arbizu, Stefania Orini, Karl Herholz, Peter Nestor, Federica Agosta, Femke Bouwman, Flavio Nobili, Zuzana Walker, Giovanni Battista Frisoni, Marina Boccardi
PURPOSE: To assess the clinical utility of 18F-Fluorodeoxyglucose positron emission tomography (FDG-PET) for detection of early signs of neurodegeneration in conditions of increased risk for Alzheimer's disease (AD) as defined by: subjective cognitive decline (SCD), evidence of cerebral amyloid-pathology, apolipoprotein E (APOE) ε4-positive genotype, or autosomal dominant forms of AD (ADAD) in asymptomatic stages. METHODS: A comprehensive literature search was conducted using the PICO model to extract evidence from relevant studies...
May 13, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29755337/influence-of-apoe-and-rnf219-on-behavioral-and-cognitive-features-of-female-patients-affected-by-mild-cognitive-impairment-or-alzheimer-s-disease
#9
Alessandra Mosca, Samantha Sperduti, Viorela Pop, Domenico Ciavardelli, Alberto Granzotto, Miriam Punzi, Liborio Stuppia, Valentina Gatta, Francesca Assogna, Nerisa Banaj, Fabrizio Piras, Federica Piras, Carlo Caltagirone, Gianfranco Spalletta, Stefano L Sensi
The risk for Alzheimer's disease (AD) is associated with the presence of the
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29753274/blood-derived-integration-free-ips-cell-line-ukbi011-a-from-a-diagnosed-male-alzheimer-s-disease-patient-with-apoe-%C3%A9-4-%C3%A9-4-genotype
#10
Michael Peitz, Tamara Bechler, Catrin Cornelia Thiele, Monika Veltel, Melanie Bloschies, Klaus Fliessbach, Alfredo Ramirez, Oliver Brüstle
Alzheimer's disease (AD) is most the frequent neurodegenerative disease, and the APOE ε4 allele is the most prominent risk factor for late-onset AD. Here, we present an iPSC line generated from peripheral blood cells of a male AD patient employing Sendai virus vectors encoding the transcription factors OCT4, SOX2, KLF4 and c-MYC. The characterized iPSC line expresses typical human pluripotency markers and shows differentiation into all three germ layers, complete reprogramming vector clearance, a normal SNP genotype and maintenance of the APOE ε4/ε4 allele...
April 23, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29752306/-apoe-%C3%AE%C2%B52%C3%AE%C2%B54-genotype-incident-ad-and-mci-cognitive-decline-and-ad-pathology-in-older-adults
#11
Shahram Oveisgharan, Aron S Buchman, Lei Yu, Jose Farfel, Vladimir Hachinski, Chris Gaiteri, Philip L De Jager, Julie A Schneider, David A Bennett
OBJECTIVE: To examine the association of the APOE ε2ε4 genotype with incident Alzheimer disease (AD), mild cognitive impairment (MCI), cognitive decline, and AD pathology in older adults. METHODS: We used data from 2,151 older adults of European ancestry who were free of dementia at baseline and underwent structured annual clinical evaluation in a longitudinal study for incident AD and MCI, and cognitive decline. Postmortem examination in decedents documented pathologic AD and quantified β-amyloid and neurofibrillary tangles...
May 11, 2018: Neurology
https://www.readbyqxmd.com/read/29750429/computer-aided-diagnosis-with-radiogenomics-analysis-of-the-relationship-between-genotype-and-morphological-changes-of-the-brain-magnetic-resonance-images
#12
Chiharu Kai, Yoshikazu Uchiyama, Junji Shiraishi, Hiroshi Fujita, Kunio Doi
In the post-genome era, a novel research field, 'radiomics' has been developed to offer a new viewpoint for the use of genotypes in radiology and medicine research which have traditionally focused on the analysis of imaging phenotypes. The present study analyzed brain morphological changes related to the individual's genotype. Our data consisted of magnetic resonance (MR) images of patients with mild cognitive impairment (MCI) and Alzheimer's disease (AD), as well as their apolipoprotein E (APOE) genotypes...
May 10, 2018: Radiological Physics and Technology
https://www.readbyqxmd.com/read/29745836/haplotype-analysis-of-apoe-intragenic-snps
#13
Vladimir N Babenko, Dmitry A Afonnikov, Elena V Ignatieva, Anton V Klimov, Fedor E Gusev, Evgeny I Rogaev
BACKGROUND: APOE ε4 allele is most common genetic risk factor for Alzheimer's disease (AD) and cognitive decline. However, it remains poorly understood why only some carriers of APOE ε4 develop AD and how ethnic variabilities in APOE locus contribute to AD risk. Here, to address the role of APOE haplotypes, we reassessed the diversity of APOE locus in major ethnic groups and in Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset on patients with AD, and subjects with mild cognitive impairment (MCI), and control non-demented individuals...
April 19, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29743204/apoe-isoforms-and-carboxyl-terminal-truncated-apoe4-forms-affect-neuronal-bace1-levels-and-a%C3%AE-production-independently-of-their-cholesterol-efflux-capacity
#14
Ioannis Dafnis, Christina Raftopoulou, Christina Mountaki, Evgenia Megalou, Vassilis I Zannis, Angeliki Chroni
The beta-site amyloid precursor protein cleaving enzyme 1 (BACE1) initiates the production of amyloid-beta peptide (Aβ) which is central to the pathogenesis of Alzheimer's disease (AD). Changes in brain cholesterol homeostasis have been suggested to affect Aβ metabolism. Cholesterol homeostasis is maintained in the brain by apolipoprotein E (apoE). The apoE4 isoform constitutes the major risk factor for AD. Here, we investigated the effect of apoE forms on Aβ generation and on BACE1 levels. We also examined the potential involvement in these processes of cholesterol transporters ABCG1 and ABCG4 or the lipoprotein receptor SR-BI that are implicated in cholesterol efflux to apoE...
May 9, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29742249/oxldl-plasma-levels-in-patients-with-alzheimer-s-disease
#15
Marina Felipe Grossi, Maria das Graças Carvalho, Josianne Nicácio Silveira, Gisele Santos Gonçalves, Karina Braga Gomes, Maria Aparecida Bicalho, Ieda de Fátima Oliveira Silva
OBJECTIVE: The objective of this study was to characterize the conventional lipid profile, oxLDL levels and ApoE polymorphism in patients with Alzheimer's disease (AD) and in elderly individuals without cognitive impairment. METHODS: Eighty elderly individuals were selected and the levels of oxLDL were determined using the ELISA kit, and ApoE gene polymorphism was investigated using polymerase chain reaction-restriction fragment length polymorphism. RESULTS: Significantly reduced levels of oxLDL were observed in patients with AD compared to the control group...
April 2018: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/29740026/lack-of-genetic-support-for-shared-aetiology-of-coronary-artery-disease-and-late-onset-alzheimer-s-disease
#16
Christopher Grace, Robert Clarke, Anuj Goel, Martin Farrall, Hugh Watkins, Jemma C Hopewell
Epidemiological studies suggest a positive association between coronary artery disease (CAD) and late-onset Alzheimer's disease (LOAD). This large-scale genetic study brings together 'big data' resources to examine the causal impact of genetic determinants of CAD on risk of LOAD. A two-sample Mendelian randomization approach was adopted to estimate the causal effect of CAD on risk of LOAD using summary data from 60,801 CAD cases from CARDIoGRAMplusC4D and 17,008 LOAD cases from the IGAP Consortium. Additional analyses assessed the independent relevance of genetic associations at the APOE locus for both CAD and LOAD...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739406/dna-methylation-in-the-apoe-genomic-region-is-associated-with-cognitive-function-in-african-americans
#17
Jiaxuan Liu, Wei Zhao, Erin B Ware, Stephen T Turner, Thomas H Mosley, Jennifer A Smith
BACKGROUND: Genetic variations in apolipoprotein E (APOE) and proximal genes (PVRL2, TOMM40, and APOC1) are associated with cognitive function and dementia, particularly Alzheimer's disease. Epigenetic mechanisms such as DNA methylation play a central role in the regulation of gene expression. Recent studies have found evidence that DNA methylation may contribute to the pathogenesis of dementia, but its association with cognitive function in populations without dementia remains unclear...
May 8, 2018: BMC Medical Genomics
https://www.readbyqxmd.com/read/29736222/analysis-of-apolipoprotein-e-genetic-variation-in-patients-with-alzheimer-disease-referred-to-imam-reza-clinic-rasht-iran-in-2015
#18
Amir Reza Ghayeghran, Maryam Akbarshahi, Zivar Salehi, Ali Davoudi-Kiakalayeh
Background: Alzheimer disease (AD) is a progressive neurological degenerative disorder and the most common form of dementia. There are about 100 genes linked to AD including apolipoprotein E (ApoE). This gene exists in the form of three allele polymorphisms of ε2 , ε3 and ε4 and six genotypes of ε2 ε3 , ε2 ε2 , ε3 ε3 , ε2 ε4 , ε3 ε4 , and ε4 ε4 . We aimed to study the association of ApoE polymorphism with AD in Guilan province, Iran. Methods: The study group consisted of 70 AD patients and 100 healthy individuals as a control group...
October 7, 2017: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/29723294/probing-the-role-of-ppar%C3%AE-in-the-regulation-of-late-onset-alzheimer-s-disease-associated-genes
#19
Julio Barrera, Shobana Subramanian, Ornit Chiba-Falek
Peroxisome proliferator-activated receptor-γ (PPARγ), is a transcription factor that governs pathways, such as lipid metabolism and immune response, that have been implicated in the etiology of LOAD. Previously, we established HepG2-derived cell-lines with stable knockdown of PPARγ gene, and showed an increase in mRNA levels of genes mapped in the APOE linkage disequilibrium (LD) region on chromosome 19q13.32, with the greatest effect observed for APOE-mRNA. Here, we extended the analysis using our PPARγ knockdown model system and investigated the broader effect on expression changes of genes implicated in LOAD via genome wide association studies (GWAS)...
2018: PloS One
https://www.readbyqxmd.com/read/29718387/investigating-predictors-of-cognitive-decline-using-machine-learning
#20
Ramon Casanova, Santiago Saldana, Michael W Lutz, Brenda L Plassman, Maragatha Kuchibhatla, Kathleen M Hayden
Objectives: Genetic risks for cognitive decline are not modifiable; however their relative importance compared to modifiable factors is unclear. We used machine learning to evaluate modifiable and genetic risk factors for Alzheimer's disease(AD), to predict cognitive decline. Methods: Health and Retirement Study participants, aged 65-90, with DNA and >2 cognitive evaluations, were included (n=7,142). Predictors included age, body mass index, gender, education, APOE ε4, CVD, hypertension, diabetes, stroke, neighborhood socio-economic status(NSES), and AD risk genes...
April 27, 2018: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
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