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Apolipoprotein E

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https://www.readbyqxmd.com/read/29345733/putative-mechanisms-of-cognitive-decline-with-implications-for-clinical-research-and-practice
#1
Tadeu Oliveira, Angela Starkweather, Divya Ramesh, Joseph Fetta, Debra Lynch Kelly, Debra E Lyon, Lana Sargent
Multiple intrinsic and extrinsic mechanisms contribute to vulnerability of cognitive decline and nurses play a significant role in assisting individuals and families to use strategies for healthy cognitive aging. The objective of this narrative review is to provide a synthesis of the intrinsic and extrinsic mechanisms of cognitive decline and conditions that are associated with cognitive decline. Well-established intrinsic mechanisms of cognitive decline include aging, apolipoprotein E (APOE) ε4 carrier status, SORL1 mutations, neuroinflammation, mitochondrial dysfunction, amyloid deposition, and demyelination...
January 18, 2018: Nursing Forum
https://www.readbyqxmd.com/read/29341070/personality-changes-during-the-transition-from-cognitive-health-to-mild-cognitive-impairment
#2
Richard J Caselli, Blake T Langlais, Amylou C Dueck, Bruce R Henslin, Travis A Johnson, Bryan K Woodruff, Charlene Hoffman-Snyder, Dona E C Locke
BACKGROUND/OBJECTIVES: Behavioral problems in individuals with Alzheimer's disease (AD) impose major management challenges. Current prevention strategies are anchored to cognitive outcomes, but behavioral outcomes may provide another, clinically relevant opportunity for preemptive therapy. We sought to determine whether personality changes that predispose to behavioral disorders arise during the transition from preclinical AD to mild cognitive impairment (MCI). DESIGN: Longitudinal observational cohort study...
January 17, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29340569/associations-of-the-top-20-alzheimer-disease-risk-variants-with-brain-amyloidosis
#3
Liana G Apostolova, Shannon L Risacher, Tugce Duran, Eddie C Stage, Naira Goukasian, John D West, Triet M Do, Jonathan Grotts, Holly Wilhalme, Kwangsik Nho, Meredith Phillips, David Elashoff, Andrew J Saykin
Importance: Late-onset Alzheimer disease (AD) is highly heritable. Genome-wide association studies have identified more than 20 AD risk genes. The precise mechanism through which many of these genes are associated with AD remains unknown. Objective: To investigate the association of the top 20 AD risk variants with brain amyloidosis. Design, Setting, and Participants: This study analyzed the genetic and florbetapir F 18 data from 322 cognitively normal control individuals, 496 individuals with mild cognitive impairment, and 159 individuals with AD dementia who had genome-wide association studies and 18F-florbetapir positron emission tomographic data from the Alzheimer's Disease Neuroimaging Initiative (ADNI), a prospective, observational, multisite tertiary center clinical and biomarker study...
January 16, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/29338921/faster-progression-from-mci-to-probable-ad-for-carriers-of-a-single-nucleotide-polymorphism-associated-with-type-2-diabetes
#4
Hugo Girard, Olivier Potvin, Scott Nugent, Caroline Dallaire-Théroux, Stephen Cunnane, Simon Duchesne
Sporadic Alzheimer's disease (AD), as opposed to its autosomal dominant form, is likely caused by a complex interaction of genetic, environmental, and health lifestyle factors. Twin studies indicate that sporadic AD heritability could be between 58% and 79%, around half of which is explained by the ε4 allele of the apolipoprotein E (APOE4). We hypothesized that genes associated with known risk factors for AD, namely hypertension, hypercholesterolemia, obesity, diabetes, and cardiovascular disease, would contribute significantly to the remaining heritability...
December 7, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29336478/apelin-13-treatment-enhances-the-stability-of-atherosclerotic-plaques
#5
Rodrigo Araujo Fraga-Silva, Hugo Seeman, Fabrizio Montecucco, Analina Raquel da Silva, Fabienne Burger, Fabiana Pereira Costa-Fraga, Léa Anguenot, François Mach, Robson Augusto Souza Dos Santos, Nikolaos Stergiopulos, Rafaela Fernandes da Silva
BACKGROUND: Apelin is an endogenous peptidergic system which modulates cardiovascular function. Recent studies pointed out a fundamental contribution of apelin on atherosclerosis development; however, such reports revealed contradictory data, and to date, it is difficult to accurately define a beneficial or deleterious role. To better understand apelin function on atherosclerosis, we aimed to investigate apelin-13 treatment effects on atherosclerotic plaques composition. DESIGN: Apolipoprotein E gene-deleted mice were fed on Western-type diet for 11 weeks...
January 16, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29335318/longitudinal-effect-of-stroke-on-cognition-a-systematic-review
#6
REVIEW
Eugene Yh Tang, Obreniokibo Amiesimaka, Stephanie L Harrison, Emma Green, Christopher Price, Louise Robinson, Mario Siervo, Blossom Cm Stephan
BACKGROUND: Stroke is associated with an increased risk of dementia; however, the impact of stroke on cognition has been found to be variable, such that stroke survivors can show decline, remain stable, or revert to baseline cognitive functioning. Knowing the natural history of cognitive impairment after stroke is important for intervention. The aim of this systematic review is to investigate the longitudinal course of cognitive function in stroke survivors. METHODS AND RESULTS: Three electronic databases (Medline, Embase, PsycINFO) were searched using OvidSP from inception to July 15, 2016...
January 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29334656/activated-protein-c-suppresses-osteoclast-differentiation-via-endothelial-protein-c-receptor-protease-activated-receptor-1-sphingosine-1-phosphate-receptor-and-apolipoprotein-e-receptor-2
#7
Kakunoshin Yoshida, Nobuyuki Akita, Takayuki Okamoto, Kunihiro Asanuma, Atsumasa Uchida, Akihiro Sudo, Motomu Shimaoka, Koji Suzuki, Tatsuya Hayashi
INTRODUCTION: Bone remodeling relies on a delicate balance between formation and resorption of bone tissues, processes in which bone-forming osteoblasts and bone-resorbing osteoclasts play central roles. Recently, we reported that anticoagulant activated protein C (APC) promotes osteoblast proliferation, but the role of the blood coagulation system in bone remodeling remains unclear. In this study, to further elucidate the relationship between bone remodeling and blood coagulation, we investigated the effect of APC on osteoclast differentiation...
January 3, 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29334498/evidence-based-interpretation-of-amyloid-%C3%AE-pet-results-a-clinician-s-tool
#8
David Bergeron, Rik Ossenkoppele, Robert Jr Laforce
BACKGROUND: Amyloid-β positron emission tomography (PET) allows for in vivo detection of fibrillar amyloid plaques, a pathologic hallmark of Alzheimer's disease (AD). However, amyloid-β PET interpretation is limited by the imperfect correlation between PET and autopsy, and the fact that it is positive in about 20% to 30% of cognitively normal individuals and non-AD dementias, especially when older or carrying the ε4 allele of apolipoprotein E (ApoE4). When facing a positive amyloid PET, clinicians have to evaluate the probability of a pathologic false positive as well as the probability of amyloid positivity being age-related, comorbid to a primary non-AD dementia (clinicopathologic false positive)...
January 12, 2018: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29330881/cocaine-and-hiv-1-tat-disrupt-cholesterol-homeostasis-in-astrocytes-implications-for-hiv-associated-neurocognitive-disorders-in-cocaine-user-patients
#9
Bianca Cotto, Kalimuthusamy Natarajaseenivasan, Kimberly Ferrero, Leroy Wesley, Matthew Sayre, Dianne Langford
Cholesterol synthesis and clearance by astrocytes are tightly regulated to maintain constant levels within the brain. In this context, liver X receptors (LXRs) are the master regulators of cholesterol homeostasis in the central nervous system (CNS). Increasing levels of cholesterol in astrocytes trigger LXR activation leading to the transcription of target genes involved in cholesterol trafficking and efflux, including apolipoprotein E, cytochrome P450 enzymes, sterol regulatory binding protein, and several ATP-binding cassette transporter proteins...
January 13, 2018: Glia
https://www.readbyqxmd.com/read/29326316/fibronectin-containing-extra-domain-a-induces-plaque-destabilization-in-the-innominate-artery-of-aged-apolipoprotein-e-deficient-mice
#10
Prakash Doddapattar, Manish Jain, Nirav Dhanesha, Steven R Lentz, Anil K Chauhan
OBJECTIVE: Fibronectin containing extra domain A (Fn-EDA) is an endogenous ligand of TLR4 (toll-like receptor 4) and is abundant in the extracellular matrix of advanced atherosclerotic lesions in human and mice. Irrespective of sex, deletion of Fn-EDA reduces early atherosclerosis in apolipoprotein E-deficient (Apoe-/-) mice. However, the contribution of Fn-EDA in advanced atherosclerosis remains poorly characterized. We determined the contribution of Fn-EDA in advanced atherosclerotic lesions of aged (1-year-old) Apoe-/- mice...
January 11, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29326312/foxo3a-forkhead-transcription-factor-o-subfamily-member-3a-links-vascular-smooth-muscle-cell-apoptosis-matrix-breakdown-atherosclerosis-and-vascular-remodeling-through-a-novel-pathway-involving-mmp13-matrix-metalloproteinase-13
#11
Haixiang Yu, Adam Fellows, Kirsty Foote, Zhaoqing Yang, Nichola Figg, Trevor Littlewood, Martin Bennett
OBJECTIVE: Vascular smooth muscle cell (VSMC) apoptosis accelerates atherosclerosis and promotes breakdown of the extracellular matrix, but the mechanistic links between these 2 processes are unknown. The forkhead protein FOXO3a (forkhead transcription factor O subfamily member 3a) is activated in human atherosclerosis and induces a range of proapoptotic and other transcriptional targets. We, therefore, determined the mechanisms and consequences of FOXO3a activation in atherosclerosis and arterial remodeling after injury...
January 11, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29325614/ethical-issues-in-neurogenetics
#12
Wendy R Uhlmann, J Scott Roberts
Many neurogenetic conditions are inherited and therefore diagnosis of a patient will have implications for the patient's relatives and can raise ethical issues. Predictive genetic testing offers asymptomatic relatives the opportunity to determine their risk status for a neurogenetic condition, and professional guidelines emphasize patients' autonomy and informed, voluntary decision making. Beneficence and nonmaleficence both need to be considered when making decisions about disclosure and nondisclosure of genetic information and test results...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325447/longitudinal-association-of-amyloid-beta-and-anxious-depressive-symptoms-in-cognitively-normal-older-adults
#13
Nancy J Donovan, Joseph J Locascio, Gad A Marshall, Jennifer Gatchel, Bernard J Hanseeuw, Dorene M Rentz, Keith A Johnson, Reisa A Sperling
OBJECTIVE: To understand the role of depressive symptoms in preclinical Alzheimer's disease, it is essential to define their temporal relationship to Alzheimer's proteinopathies in cognitively normal older adults. The study objective was to examine associations of brain amyloid beta and longitudinal measures of depression and depressive symptom clusters in a cognitively normal sample of older adults. METHOD: A total of 270 community-dwelling, cognitively normal elderly individuals underwent baseline Pittsburgh compound B (PiB) positron emission tomography (PET) measures of cortical aggregate amyloid beta and annual assessments with the 30-item Geriatric Depression Scale (GDS)...
January 12, 2018: American Journal of Psychiatry
https://www.readbyqxmd.com/read/29323721/brain-derived-neurotrophic-factor-modulates-cholesterol-homeostasis-and-apolipoprotein-e-synthesis-in-human-cell-models-of-astrocytes-and-neurons
#14
Maria Stefania Spagnuolo, Aldo Donizetti, Lucia Iannotta, Vincenza Aliperti, Chiara Cupidi, Amalia Cecilia Bruni, Luisa Cigliano
In the central nervous system, cholesterol is critical to maintain membrane plasticity, cellular function, and synaptic integrity. In recent years, much attention was focused on the role of cholesterol in brain since a breakdown of cholesterol metabolism has been associated with different diseases. Brain-derived neurotrophic factor (BDNF) was previously reported to elicit cholesterol biosynthesis and promote the accumulation of presynaptic proteins in cholesterol-rich lipid rafts, but no data are available on its ability to modulate physiological mechanisms involved in cholesterol homeostasis...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29322089/the-wisconsin-registry-for-alzheimer-s-prevention-a-review-of-findings-and-current-directions
#15
REVIEW
Sterling C Johnson, Rebecca L Koscik, Erin M Jonaitis, Lindsay R Clark, Kimberly D Mueller, Sara E Berman, Barbara B Bendlin, Corinne D Engelman, Ozioma C Okonkwo, Kirk J Hogan, Sanjay Asthana, Cynthia M Carlsson, Bruce P Hermann, Mark A Sager
The Wisconsin Registry for Alzheimer's Prevention is a longitudinal observational cohort study enriched with persons with a parental history (PH) of probable Alzheimer's disease (AD) dementia. Since late 2001, Wisconsin Registry for Alzheimer's Prevention has enrolled 1561 people at a mean baseline age of 54 years. Participants return for a second visit 4 years after baseline, and subsequent visits occur every 2 years. Eighty-one percent (1270) of participants remain active in the study at a current mean age of 64 and 9 years of follow-up...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29321388/suppression-of-abdominal-aortic-aneurysm-formation-in-mice-by-teneligliptin-a-dipeptidyl-peptidase-4-inhibitor
#16
Yusuke Takahara, Tomotake Tokunou, Toshihiro Ichiki
AIM: Dipeptidyl peptidase-4 (DPP-4) inhibitors lower blood glucose levels through inhibition of incretin degradation, which stimulates insulin secretion. Recent studies reported that DPP-4 inhibitors suppressed atherogenesis in apolipoprotein E-knockout (ApoEKO) mice. In this study, we investigated whether teneligliptin, a DPP-4 inhibitor, affects the development of abdominal aortic aneurysms (AAA) in ApoEKO mice. METHODS: ApoEKO mice were fed a high-fat diet (HFD) and infused with angiotensin (Ang) II by osmotic mini pumps for 4 weeks to induce AAA with (DPP-4i group) or without (control group) teneligliptin administered orally from 1 week before HFD and Ang II infusion to the end of the experiment...
January 10, 2018: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/29317609/apolipoprotein-e-apoe-%C3%AE%C2%B54-and-cognitive-decline-over-the-adult-life-course
#17
Mark James Rawle, Daniel Davis, Rebecca Bendayan, Andrew Wong, Diana Kuh, Marcus Richards
We tested the association between APOE-ε4 and processing speed and memory between ages 43 and 69 in a population-based birth cohort. Analyses of processing speed (using a timed letter search task) and episodic memory (a 15-item word learning test) were conducted at ages 43, 53, 60-64 and 69 years using linear and multivariable regression, adjusting for gender and childhood cognition. Linear mixed models, with random intercepts and slopes, were conducted to test the association between APOE and the rate of decline in these cognitive scores from age 43 to 69...
January 10, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29317346/protein-corona-and-phospholipase-activity-drive-selective-accumulation-of-nanomicelles-in-atherosclerotic-plaques
#18
Ana V Lechuga-Vieco, Hugo Groult, Juan Pellico, Jesús Mateo, Jose A Enríquez, Jesús Ruiz-Cabello, Fernando Herranz
ApoB-100 and Phosphatidylcholine-specific phospholipase C (PC-PLC) are important contributors to atherosclerosis development. ApoB-100 is the main structural protein of LDL, being directly associated with atherosclerosis plaque generation. PC-PLC is highly expressed in atherosclerosis lesions and contributes to their progression. We show how phosphatidylcholine-coated nanomicelles can be used for specific characterisation of atherosclerosis plaque. Results show that ApoB-100 in the protein corona of the nanomicelle targets the particles to atherosclerotic areas in apolipoprotein E-/- mice...
January 6, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29316447/circulating-metabolites-and-general-cognitive-ability-and-dementia-evidence-from-11-cohort-studies
#19
Sven J van der Lee, Charlotte E Teunissen, René Pool, Martin J Shipley, Alexander Teumer, Vincent Chouraki, Debora Melo van Lent, Juho Tynkkynen, Krista Fischer, Jussi Hernesniemi, Andres Metspalu, Archana Singh-Manoux, Aswin Verhoeven, Gonneke Willemsen, Francien A de Leeuw, Holger Wagner, Jenny van Dongen, Johannes Hertel, Kathrin Budde, Ko Willems van Dijk, Leonie Weinhold, M Arfan Ikram, Maik Pietzner, Markus Perola, Michael Wagner, Nele Friedrich, P E Slagboom, Philip Scheltens, Qiong Yang, Robert E Gertzen, Sarah Egert, Shuo Li, Thomas Hankemeier, Catharine E M van Beijsterveldt, Vasan Ramachandran, Wolfgang Maier, Carel F W Peeters, Hans Jörgen Grabe, Alfredo Ramirez, Sudha Seshadri, Toomas Haller, Mika Kivimäki, Veikko Salomaa, Ayşe Demirkan, Dorret Boomsma, Wiesje M van der Flier, Najaf Amin, Cornelia M van Duijn
INTRODUCTION: Identifying circulating metabolites that are associated with cognition and dementia may improve our understanding of the pathogenesis of dementia and provide crucial readouts for preventive and therapeutic interventions. METHODS: We studied 299 metabolites in relation to cognition (general cognitive ability) in two discovery cohorts (N total = 5658). Metabolites significantly associated with cognition after adjusting for multiple testing were replicated in four independent cohorts (N total = 6652), and the associations with dementia and Alzheimer's disease (N = 25,872) and lifestyle factors (N = 5168) were examined...
January 6, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29315811/apolipoprotein-a1-apo-a1-distribution-pattern-in-the-human-achilles-tendon
#20
James E Gaida, Håkan Alfredson, Alex Scott, Rouhollah Mousavizadeh, Sture Forsgren
Metabolic factors such as cholesterol appear to play an important role in the development of Achilles tendinopathy. There is, however, no morphologic proof explaining the link between high cholesterol and tendinopathy. As apolipoprotein A1 (Apo-A1) is essential for reverse cholesterol transport, it may be related to cholesterol overload in tendon. Nothing is known about Apo-A1 expression in tendon tissue. We examined the distribution of Apo-A1 protein in biopsies from normal and tendinopathy affected human Achilles tendons, and APOA1 mRNA production from cultured human hamstring tenocytes...
January 5, 2018: Scandinavian Journal of Medicine & Science in Sports
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