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Apolipoprotein E

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https://www.readbyqxmd.com/read/28912655/chronic-eccentric-exercise-and-antioxidant-supplementation-effects-on-lipid-profile-and-insulin-sensitivity
#1
Christina Yfanti, Athanasios Tsiokanos, Ioannis G Fatouros, Anastasios A Theodorou, Chariklia K Deli, Yiannis Koutedakis, Athanasios Z Jamurtas
Eccentric exercise has been shown to exert beneficial effects in both lipid profile and insulin sensitivity. Antioxidant supplementation during chronic exercise is controversial as it may prevent the physiological training-induced adaptations. The aim of this study was to investigate: 1) the minimum duration of the eccentric exercise training required before changes on metabolic parameters are observed and 2) whether antioxidant supplementation during training would interfere with these adaptations. Sixteen young healthy men were randomized into the Vit group (1 g of vitamin C and 400 IU vitamin E daily) and the placebo (PL) group...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912560/the-srgap2-snps-their-haplotypes-and-g%C3%A2-%C3%A3-%C3%A2-e-interactions-on-serum-lipid-traits
#2
Liu Miao, Rui-Xing Yin, Jin-Zhen Wu, Shuo Yang, Wei-Xiong Lin, Shang-Ling Pan
Maonan nationality is a relatively conservative and isolated minority in China. Little is known about the association of the Slit-Robo Rho GTPase activating protein 2 gene (SRGAP2) single nucleotide polymorphisms (SNPs) and serum lipid levels in the Chinese populations. This study was performed to clarify the association of the SRGAP2 rs2483058 and rs2580520 SNPs and their haplotypes with serum lipid traits in the Maonan and Han populations. Genotyping of the 2 SNPs was performed in 2444 unrelated subjects (Han, 1210 and Maonan, 1234) by polymerase chain reaction and restriction fragment length polymorphism combined with gel electrophoresis, and then confirmed by direct sequencing...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910603/apolipoprotein-a-iv-constrains-hpa-and-behavioral-stress-responsivity-in-a-strain-dependent-manner
#3
Amy E B Packard, Jintao Zhang, Brent Myers, Chih-Wei Ko, Fei Wang, Patrick Tso, Yvonne M Ulrich-Lai
There is a critical gap in our knowledge of the mechanisms that govern interactions between daily life experiences (e.g., stress) and metabolic diseases, despite evidence that stress can have profound effects on cardiometabolic health. Apolipoprotein A-IV (apoA-IV) is a protein found in chylomicrons (lipoprotein particles that transport lipids throughout the body) where it participates in lipid handling and the regulation of peripheral metabolism. Moreover, apoA-IV is expressed in brain regions that regulate energy balance including the arcuate nucleus...
September 1, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28910310/gugulipid-causes-hypercholesterolemia-leading-to-endothelial-dysfunction-increased-atherosclerosis-and-premature-death-by-ischemic-heart-disease-in-male-mice
#4
Andrea Leiva, Susana Contreras-Duarte, Ludwig Amigo, Esteban Sepúlveda, Mauricio Boric, Verónica Quiñones, Dolores Busso, Attilio Rigotti
For proper cholesterol metabolism, normal expression and function of scavenger receptor class B type I (SR-BI), a high-density lipoprotein (HDL) receptor, is required. Among the factors that regulate overall cholesterol homeostasis and HDL metabolism, the nuclear farnesoid X receptor plays an important role. Guggulsterone, a bioactive compound present in the natural product gugulipid, is an antagonist of this receptor. This natural product is widely used globally as a natural lipid-lowering agent, although its anti-atherogenic cardiovascular benefit in animal models or humans is unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28901129/peptide-level-interactions-between-proteins-and-small-molecule-drug-candidates-by-hdx-ms-plimstex-and-modified-suprex-the-example-of-apoe3
#5
Hanliu Wang, Don L Rempel, Daryl E Giblin, Carl Frieden, Michael L Gross
We describe a platform utilizing two methods based on hydrogen-deuterium exchange (HDX) coupled with mass spectrometry (MS) to characterize interactions between a protein and a small-molecule ligand. The model system is apolipoprotein E3 (apoE3) and a small-molecule drug candidate. We extended PLIMSTEX (protein-ligand interactions by mass spectrometry, titration, and H/D Exchange) to the regional level by incorporating enzymatic digestion to acquire binding information for peptides. In a single experiment, we not only identified putative binding sites, but also obtained affinities of 6...
September 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28900374/association-between-polymorphisms-in-the-promoter-region-of-the-apolipoprotein-e-apoe-gene-and-alzheimer-s-disease-a-meta-analysis
#6
Hanyan Xiao, Yifeng Gao, Lei Liu, Yan Li
Several studies have evaluated the role of polymorphisms in the promoter region of APOE gene that encodes apolipoprotein E (APOE) and the susceptibility to Alzheimer's disease (AD). The aim of this literature review and meta-analysis was to investigate the relationship between the APOE promoter region single nucleotide polymorphisms (SNPs) (rs449647, -491A/T; rs769446, -427T/C and rs405509 -219T/G) and the risk of developing AD. Eligible controlled studies published up to November 2016 were retrieved from main online scientific and medical databases...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28899422/moderating-effects-of-sex-on-the-impact-of-diagnosis-and-amyloid-positivity-on-verbal-memory-and-hippocampal-volume
#7
Jessica Z K Caldwell, Jody-Lynn Berg, Jeffrey L Cummings, Sarah J Banks
BACKGROUND: Alzheimer's disease (AD) impacts men and women differently, but the effect of sex on predementia stages is unclear. The objective of this study was to examine whether sex moderates the impact of florbetapir positron emission tomography (PET) amyloid positivity (A(+)) on verbal learning and memory performance and hippocampal volume (HV) in normal cognition (NC) and early mild cognitive impairment (eMCI). METHODS: Seven hundred forty-two participants with NC and participants with eMCI from the Alzheimer's Disease Neuroimaging Initiative (second cohort [ADNI2] and Grand Opportunity Cohort [ADNI-GO]) were included...
September 12, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28899419/increased-plasma-lipid-levels-exacerbate-muscle-pathology-in-the-mdx-mouse-model-of-duchenne-muscular-dystrophy
#8
Nadia Milad, Zoe White, Arash Y Tehrani, Stephanie Sellers, Fabio M V Rossi, Pascal Bernatchez
BACKGROUND: Duchenne muscular dystrophy (DMD) is caused by loss of dystrophin expression and leads to severe ambulatory and cardiac function decline. However, the dystrophin-deficient mdx murine model of DMD only develops a very mild form of the disease. Our group and others have shown vascular abnormalities in animal models of MD, a likely consequence of the fact that blood vessels express the same dystrophin-associated glycoprotein complex (DGC) proteins as skeletal muscles. METHODS: To test the blood vessel contribution to muscle damage in DMD, mdx (4cv) mice were given elevated lipid levels via apolipoprotein E (ApoE) gene knockout combined with normal chow or lipid-rich Western diets...
September 12, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/28899010/modelling-apoe-%C3%A9-3-4-allele-associated-sporadic-alzheimer-s-disease-in-an-induced-neuron
#9
Hongwon Kim, Junsang Yoo, Jaein Shin, Yujung Chang, Junghyun Jung, Dong-Gyu Jo, Janghwan Kim, Wonhee Jang, Christopher J Lengner, Byung-Soo Kim, Jongpil Kim
The recent generation of induced neurons by direct lineage conversion holds promise for in vitro modelling of sporadic Alzheimer's disease. Here, we report the generation of induced neuron-based model of sporadic Alzheimer's disease in mice and humans, and used this system to explore the pathogenic mechanisms resulting from the sporadic Alzheimer's disease risk factor apolipoprotein E (APOE) ɛ3/4 allele. We show that mouse and human induced neurons overexpressing mutant amyloid precursor protein in the background of APOE ɛ3/4 allele exhibit altered amyloid precursor protein (APP) processing, abnormally increased production of amyloid-β42 and hyperphosphorylation of tau...
August 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28898389/racial-differences-in-the-association-between-apolipoprotein-e-risk-alleles-and-overall-and-total-cardiovascular-mortality-over-18%C3%A2-years
#10
Kumar B Rajan, Lisa L Barnes, Robert S Wilson, Elizabeth A McAninch, Jennifer Weuve, Dominique Sighoko, Denis A Evans
OBJECTIVES: To examine the difference in the association between apolipoprotein (APO)E allele and overall and cardiovascular mortality between African Americans (AAs) and European Americans (EAs). DESIGN: Longitudinal, cohort study of 18 years. SETTING: Biracial urban US population sample. PARTICIPANTS: 4,917, 68% AA and 32% EA. MEASUREMENTS: APOE genotype and mortality based on National Death Index...
September 12, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28895973/development-and-testing-of-a-neuropsychiatric-symptoms-model-in-mild-cognitive-impairment
#11
Laura Kirk, Glenn E Smith, Joseph E Gaugler, Ken Hepburn, David Knopman, Marsha Lewis
Neuropsychiatric symptoms are prevalent in individuals with mild cognitive impairment (MCI) and have a significant detrimental effect on health and quality of life. Identifying factors that contribute to their occurrence may enable prompt treatment and intervention. The current study entails the development and testing of a biopsychosocially based model to assist nurses in the identification of individuals with MCI who are most likely to experience symptoms of depression, apathy, and/or anxiety. Factors within the biological and sociodemographic domains of the Neuropsychiatric Symptoms in MCI (NPSMCI) model were tested using multivariate logistic regression analyses...
September 12, 2017: Journal of Gerontological Nursing
https://www.readbyqxmd.com/read/28893538/indispensable-role-of-lipoprotein-bound-apoe-in-adipogenesis-and-endocytosis-induced-by-postprandial-trl
#12
Mingyu Zhang, Yanhong Li, Xuehong Wei, Feng Tian, Fan Ouyang, Shuiping Zhao, Ling Liu
Diet-associated obesity is coexisted with postprandial hypertriglyceridemia that indicates increased number of triglyceride-rich lipoproteins (TRL). This study aimed to investigate the effect of postprandial TRL-bound apolipoprotein E (ApoE) on adipogenesis and potential mechanisms. 3T3-L1 cells were cultured with (i) human TRL (h-TRL) with or without insulin, or (ii) TRL from wild type mice (WT-TRL) or ApoE knock-out mice (EKO-TRL) and insulin. The differentiating adipocytes were incubated with different kinds of TRL labeled by red fluorescence and confocal microscopy was performed...
September 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28890046/effect-of-multiple-neonatal-sevoflurane-exposures-on-hippocampal-apolipoprotein-e%C3%A2-levels-and-learning-and-memory-abilities
#13
Junli Jiang, Chunchun Tang, Juanjuan Ren, Chao Zhang, Liang Dong, Zhaoqiong Zhu
BACKGROUND: Sevoflurane anesthesia is widely used in pediatric patients. In this study, we investigated whether early multiple exposures to sevoflurane induced cognitive dysfunction by altering the hippocampal expression of ApoE later in development. METHODS: Sprague-Dawley rats were exposed to 2.6% sevoflurane at postnatal day 7 (P7), P14, and P21 for 2 h. The ability of learning and memory was assessed using the Morris water maze at P37 and P97. The hippocampal volume was measured by magnetic resonance imaging (MRI) at P37 and P97...
August 31, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28889998/association-of-apolipoprotein-e-polymorphisms-with-age-related-macular-degeneration-subtypes-an-updated-systematic-review-and-meta-analysis
#14
Mao Xiying, Wu Wenbo, Fang Wangyi, Liu Qinghuai
BACKGROUND AND AIMS: Age-related macular degeneration (AMD) is the worldwide leading cause of blindness among the elderly, especially in developed countries. The possible association between apolipoprotein E (ApoE) polymorphism (ε2, ε3, ε4) and AMD has been extensively investigated with conflicting results, especially when specifying different clinical phenotypes of AMD. Herein, we conducted a meta-analysis by integrating several recent large-sample studies to verify the effect of ApoE polymorphisms on AMD subtypes...
September 7, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28888721/tmem106b-and-apoe-polymorphisms-in-chmp2b-mediated-frontotemporal-dementia-ftd-3
#15
Nina Rostgaard, Peter Roos, Esben Budtz-Jørgensen, Peter Johannsen, Gunhild Waldemar, Anne Nørremølle, Suzanne G Lindquist, Susanne Gydesen, Jeremy M Brown, John Collinge, Adrian M Isaacs, Troels T Nielsen, Jørgen E Nielsen
Single-nucleotide polymorphisms in the TMEM106B gene have been identified as a risk factor in frontotemporal dementia (FTD). The major allele of SNP rs3173615 is a risk factor in sporadic FTD, whereas the minor allele seems protective in GRN- and C9orf72-mediated FTD. The role of apolipoprotein E (ApoE) in FTD is uncertain, though an established risk factor in Alzheimer's disease. In a unique Danish family, inherited FTD is caused by a mutation in the CHMP2B gene located on chromosome 3 (FTD-3). In this family, both risk factors TMEM106B and ApoE were analyzed and correlated to age at onset (AAO) and progression in terms of age at institutionalization (AAI) and age at death (AAD)...
July 11, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28888368/involvement-of-scavenger-receptor-class-b-type-1-and-low-density-lipoprotein-receptor-in-the-internalization-of-liposomes-into-hepg2-cells
#16
Kumiko Sakai-Kato, Mari Sakurai, Yuki Takechi-Haraya, Kunie Nanjo, Yukihiro Goda
In this study, HepG2 cells, an in vitro model system for human hepatocytes, were used to evaluate the interaction of lipoprotein receptors with liposomes carrying fluorescently labeled cholesterol and their subsequent intracellular uptake. In these experiments, two lipoprotein receptors, scavenger receptor class B type 1 (SR-B1) and low-density lipoprotein receptor (LDLR), accounted for approximately 20% and 10%, respectively, of the intracellular uptake of the labeled liposomes. These findings indicate that additional mechanisms contributed to liposomal internalization...
September 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28887403/the-functions-of-reelin-in-membrane-trafficking-and-cytoskeletal-dynamics-implications-for-neuronal-migration-polarization-and-differentiation
#17
REVIEW
Jessica Santana, María-Paz Marzolo
Reelin is a large extracellular matrix protein with relevant roles in mammalian central nervous system including neurogenesis, neuronal polarization and migration during development; and synaptic plasticity with its implications in learning and memory, in the adult. Dysfunctions in reelin signaling are associated with brain lamination defects such as lissencephaly, but also with neuropsychiatric diseases like autism, schizophrenia and depression as well with neurodegeneration. Reelin signaling involves a core pathway that activates upon reelin binding to its receptors, particularly ApoER2 (apolipoprotein E receptor 2)/LRP8 (low-density lipoprotein receptor-related protein 8) and very low-density lipoprotein receptor, followed by Src/Fyn-mediated phosphorylation of the adaptor protein Dab1 (Disabled-1)...
September 7, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28885614/crystal-structure-of-e-coli-apolipoprotein-n-acyl-transferase
#18
Guangyuan Lu, Yingzhi Xu, Kai Zhang, Yong Xiong, He Li, Lei Cui, Xianping Wang, Jizhong Lou, Yujia Zhai, Fei Sun, Xuejun C Zhang
In Gram-negative bacteria, lipid modification of proteins is catalysed in a three-step pathway. Apolipoprotein N-acyl transferase (Lnt) catalyses the third step in this pathway, whereby it transfers an acyl chain from a phospholipid to the amine group of the N-terminal cysteine residue of the apolipoprotein. Here, we report the 2.6-Å crystal structure of Escherichia coli Lnt. This enzyme contains an exo-membrane nitrilase domain fused to a transmembrane (TM) domain. The TM domain of Lnt contains eight TM helices which form a membrane-embedded cavity with a lateral opening and a periplasmic exit...
July 4, 2017: Nature Communications
https://www.readbyqxmd.com/read/28884572/nanobody-based-apolipoprotein-e-immunosensor-for-point-of-care-testing
#19
Xiang Ren, Junrong Yan, Dan Wu, Qin Wei, Yakun Wan
Alzheimer's disease (AD) biomarkers can reflect the neurochemical indicators used to estimate the risk in clinical nephrology. Apolipoprotein E (ApoE) is an early biomarker for AD in clinical diagnosis. In this research, through bactrian camel immunization, lymphocyte isolation, RNA extraction, and library construction, ApoE-specific Nbs with high affinity were successfully separated from an immune phage display nanobody library. Herein, a colorimetric immunosensor was developed for the point-of-care testing of ApoE by layer-by-layer nanoassembly techniques and novel nanobodies (Nbs)...
September 11, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28883857/postmenopausal-cognitive-changes-and-androgen-levels-in-the-context-of-apolipoprotein-e-polymorphism
#20
Iwona Bojar, Jarosław Pinkas, Mariusz Gujski, Alfred Owoc, Dorota Raczkiewicz, Kasia Gustaw-Rothenberg
INTRODUCTION: The focus of this study was to assess cognitive functions in relation to androgens and specifically testosterone and dehydroepiandrosterone in postmenopausal women as well as the correlation between cognitive functions and these two androgens according to polymorphism of the apolipoprotein E gene (APOE). MATERIAL AND METHODS: A group of 402 women was recruited to the study (minimum 2 years after the last menstruation, follicle-stimulating hormone (FSH) more than 30 U/ml and no dementia signs on Montreal Cognitive Assessment)...
August 2017: Archives of Medical Science: AMS
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