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https://www.readbyqxmd.com/read/29226870/alzheimer-s-disease-progression-factors-influencing-cognitive-decline
#1
Camilla Ferrari, Gemma Lombardi, Cristina Polito, Giulia Lucidi, Silvia Bagnoli, Irene Piaceri, Benedetta Nacmias, Valentina Berti, Debora Rizzuto, Laura Fratiglioni, Sandro Sorbi
BACKGROUND: Alzheimer's disease (AD) patients present high variability in the rate of cognitive decline. Despite the wide knowledge on factors influencing dementia risk, little is known on what accounts for AD progression. Previous studies on this topic have mainly analyzed each factor separately without taking into account the interaction between genetic and non-genetic factors. OBJECTIVE: The aim of the present study is to evaluate the role of demographic, clinical, therapeutic, and genetic factors and their interaction on cognitive decline among newly diagnosed AD patients...
December 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29226146/heparanase-inhibition-reduces-glucose-levels-blood-pressure-and-oxidative-stress-in-apolipoprotein-e-knockout-mice
#2
Shadi Hamoud, Rabia Shekh Muhammad, Niroz Abu-Saleh, Ahmad Hassan, Yaniv Zohar, Tony Hayek
Background: Atherosclerosis is a multifactorial process. Emerging evidence highlights a role of the enzyme heparanase in various disease states, including atherosclerosis formation and progression. Objective: The aim of the study was to investigate the effect of heparanase inhibition on blood pressure, blood glucose levels, and oxidative stress in apoE-/- mice. Methods: Male apoE-/- mice were divided into two groups: one treated by the heparanase inhibitor PG545, administered intraperitoneally weekly for seven weeks, and the other serving as control group (injected with saline)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29225464/apolipoprotein-e3-mediated-cellular-uptake-of-reconstituted-high-density-lipoprotein-bearing-core-3-10-or-17-nm-hydrophobic-gold-nanoparticles
#3
Skylar T Chuang, Young-Seok Shon, Vasanthy Narayanaswami
We have developed a high-density lipoprotein (HDL)-based platform for transport and delivery of hydrophobic gold nanoparticles (AuNPs). The ability of apolipoprotein E3 (apoE3) to act as a high-affinity ligand for the low-density lipoprotein receptor (LDLr) was exploited to gain entry of HDL with AuNPs into glioblastoma cells. AuNPs of 3, 10, and 17 nm diameter, the latter two synthesized by phase transfer process, were solubilized by integration with phospholipids and apoE3, yielding reconstituted HDL (rHDL) bearing AuNPs...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29225168/cortistatin-attenuates-angiotensin-ii-induced-abdominal-aortic-aneurysm-through-inactivation-of-the-erk1-2-signaling-pathways
#4
Hao Chai, ZhongHao Tao, Wen Chen, YueYue Xu, Fuhua Huang, CunHua Su, Xin Chen
Abdominal aortic aneurysm (AAA) is a fatal disease that is associated with chronic inflammation in the vessel wall. Cortistatin is implicated in inflammation, vascular smooth muscle cell migration and other cardiovascular pathologies. But, the hypothetical effect of cortistatin on AAA remains uncertain. We investigated the effect of cortistatin administration to angiotensin (Ang) II-induced AAA formation in apolipoprotein E deficient (Apoe-/-) mice. We showed that cortistatin administration significantly suppresses incidence and severity of AAA in Apoe-/- mice...
December 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29224353/curcumin-attenuates-atherosclerosis-in-apolipoprotein-e-knockout-mice-by-inhibiting-toll-like-receptor-4-expression
#5
Shanshan Zhang, Jun Zou, Peiyang Li, Xiumei Zheng, Dan Feng
Toll-like receptor 4 (TLR4) has been reported to play a critical role in the pathogenesis of atherosclerosis, the current study aimed to investigate whether curcumin suppresses atherosclerosis development in ApoE-knockout (ApoE-/-) mice by inhibiting TLR4 expression. ApoE-/- mice were fed a high-fat diet supplemented with or without curcumin (0.1% w/w) for 16 weeks. Curcumin supplementation significantly reduced TLR4 expression and macrophage infiltration in atherosclerotic plaques. Curcumin also reduced aortic interleukin-1β (IL-1β), tumour necrosis factor-α (TNF-α), vascular cell adhesion molecule -1(VCAM-1) and intercellular adhesion molecule- 1(ICAM-1) expression, nuclear factor-κB (NF-κB) activity, and plasma IL-1β, TNF-α, soluble VCAM-1 and ICAM-1 levels...
December 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29223071/bioactive-potential-of-silica-coatings-and-its-effect-on-the-adhesion-of-proteins-to-titanium-implants
#6
F Romero-Gavilan, N Araújo-Gomes, A M Sánchez-Pérez, I García-Arnáez, F Elortza, M Azkargorta, J J Martín de Llano, C Carda, M Gurruchaga, J Suay, I Goñi
There is an ever-increasing need to develop dental implants with ideal characteristics to achieve specific and desired biological response in the scope of improve the healing process post-implantation. Following that premise, enhancing and optimizing titanium implants through superficial treatments, like silica sol-gel hybrid coatings, are regarded as a route of future research in this area. These coatings change the physicochemical properties of the implant, ultimately affecting its biological characteristics...
December 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29222871/myelin-extracellular-leaflet-compaction-requires-apolipoprotein-d-membrane-management-to-optimize-lysosomal-dependent-recycling-and-glycocalyx-removal
#7
Nadia García-Mateo, Raquel Pascua-Maestro, Alberto Pérez-Castellanos, Concepción Lillo, Diego Sanchez, Maria D Ganfornina
To compact the extracellular sides of myelin, an important transition must take place: from membrane sliding, while building the wraps, to membrane adhesion and water exclusion. Removal of the negatively charged glycocalyx becomes the limiting factor in such transition. What is required to initiate this membrane-zipping process? Knocking-out the Lipocalin Apolipoprotein D (ApoD), essential for lysosomal functional integrity in glial cells, results in a specific defect in myelin extracellular leaflet compaction in peripheral and central nervous system, which results in reduced conduction velocity and suboptimal behavioral outputs: motor learning is compromised...
December 9, 2017: Glia
https://www.readbyqxmd.com/read/29222858/obesity-lipid-profiles-and-oxidative-stress-in-children-after-liver-transplantation
#8
Piotr Czubkowski, Aldona Wierzbicka, Joanna Pawłowska, Irena Jankowska, Piotr Socha
PURPOSE: In adult liver transplant recipients, coronary artery disease and congestive heart failure are significant cause of morbidity and mortality. This may be attributed to the long-term immunosuppressive treatment, mostly with calcineurin inhibitors and steroids, which in long-term may be associated with hyperlipidemia, oxidative stress and cardiovascular complications. Since such data for children is sparse, the aim of this study was to assess the lipid and oxidative stress markers after pediatric liver transplantation (LTx)...
December 10, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/29221940/pioglitazone-attenuates-aging-related-disorders-in-aged-apolipoprotein-e-deficient-mice
#9
Dan Shen, Hao Li, Rui Zhou, Meng-Jie Liu, Hong Yu, Dong-Fang Wu
Pioglitazone (Piog) activates peroxisome proliferator activated receptor-γ (PPARγ) and is widely used in clinic for the treatment of diabetes mellitus. PPARγ in various tissues has the essential regulatory role of multiple metabolic function, suggest that PPARγ signaling may contribute to aging processes. However, little is known about the consequences of Piog on aging in aged animal models. We used apolipoprotein E deficient (apoE-/-) mice model to evaluate the effects of Piog on aging-related disorders...
December 5, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29221866/a-capillary-zone-electrophoresis-method-for-detection-of-apolipoprotein-c-iii-glycoforms-and-other-related-artifactually-modified-species
#10
Coralie Ruel, Marco Morani, Arnaud Bruneel, Christophe Junot, Myriam Taverna, François Fenaille, Thuy Tran
ApolipoproteinC-III (ApoC-III) is a human plasma glycoprotein whose O-glycosylation can be altered as a result of congenital disorders of glycosylation (CDG). ApoC-III exhibits three major glycoforms whose relative quantification is of utmost importance for the diagnosis of CDG patients. Considering the very close structures of these glycoforms and their tendency to adsorb on the capillary, a thorough optimization of capillary electrophoresis (CE) parameters including preconditioning and in-between rinsing procedures was required to efficiently separate all the ApoC-III glycoforms...
December 5, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29221142/d-4f-increases-microrna-124a-and-reduces-neuroinflammation-in-diabetic-stroke-rats
#11
Ruizhuo Ning, Poornima Venkat, Michael Chopp, Alex Zacharek, Tao Yan, Xu Cui, Don Seyfried, Jieli Chen
D-4F is an apolipoprotein-A1 mimetic peptide that promotes anti-inflammatory effects. MicroRNA-124 is the most abundant brain-specific microRNA and has anti-inflammatory effects. In this study, we investigated the therapeutic efficacy and mechanisms of D-4F treatment of stroke in type one diabetes mellitus (T1DM) rats. Male Wistar rats were induced with T1DM, subjected to embolic middle cerebral artery occlusion and treated with PBS or D-4F (1 mg/kg i.p.) at 2, 24 and 48 hours after stroke (n=8/group). A battery of function tests, brain blood barrier (BBB) integrity, white matter changes and microRNA expression were evaluated in vivo and in vitro...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29220880/development-of-a-new-biochip-array-for-apoe4-classification-from-plasma-samples-using-immunoassay-based-methods
#12
Sigrun Badrnya, Tara Doherty, Ciaran Richardson, Robert I McConnell, John V Lamont, Michael Veitinger, Stephen P FitzGerald, Maria Zellner, Ellen Umlauf
BACKGROUND: Apolipoprotein E (APOE) is a key player in lipid transport and metabolism and exists in three common isoforms: APOE2, APOE3 and APOE4. The presence of the E4 allelic variant is recognized as a major genetic risk factor for dementia and other chronic (neuro)degenerative diseases. The availability of a validated assay for rapid and reliable APOE4 classification is therefore advantageous. METHODS: Biochip array technology (BAT) was successfully applied to identify directly the APOE4 status from plasma within 3 h, through simultaneous immunoassay-based detection of both specific APOE4 and total APOE levels...
December 7, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29220823/patterns-of-progressive-atrophy-vary-with-age-in-alzheimer-s-disease-patients
#13
Cassidy M Fiford, Gerard R Ridgway, David M Cash, Marc Modat, Jennifer Nicholas, Emily N Manning, Ian B Malone, Geert Jan Biessels, Sebastien Ourselin, Owen T Carmichael, M Jorge Cardoso, Josephine Barnes
Age is not only the greatest risk factor for Alzheimer's disease (AD) but also a key modifier of disease presentation and progression. Here, we investigate how longitudinal atrophy patterns vary with age in mild cognitive impairment (MCI) and AD. Data comprised serial longitudinal 1.5-T magnetic resonance imaging scans from 153 AD, 339 MCI, and 191 control subjects. Voxel-wise maps of longitudinal volume change were obtained and aligned across subjects. Local volume change was then modeled in terms of diagnostic group and an interaction between group and age, adjusted for total intracranial volume, white-matter hyperintensity volume, and apolipoprotein E genotype...
November 14, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29218349/core-hydrophobicity-tuning-of-a-self-assembled-particle-results-in-efficient-lipid-reduction-and-favorable-organ-distribution
#14
Bhabatosh Banik, Ru Wen, Sean Marrache, Anil Kumar, Nagesh Kolishetti, Elizabeth W Howerth, Shanta Dhar
Atherosclerosis, the deadliest disease in the United States, arises due to the build up of plaques in the arteries as a result of excessive cholesterol deposition and an impaired cholesterol removal process. High density lipoproteins (HDL), popularly known as "good cholesterol", are naturally occurring nano-sized particles that, along with apolipoproteins, are deployed to maintain cholesterol homeostasis in the body. Both cholesterol efflux, from the fat-laden macrophages in the arteries, and intracellular lipid transport, to deliver cholesterol to the mitochondria of liver cells for metabolism, hold key responsibilities to maintain healthy lipid levels inside the body...
December 8, 2017: Nanoscale
https://www.readbyqxmd.com/read/29217413/apolipoprotein-e-containing-high-density-lipoprotein-hdl-modifies-the-impact-of-cholesterol-overloaded-hdl-on-incident-coronary-heart-disease-risk-a-community-based-cohort-study
#15
Yue Qi, Jing Liu, Wei Wang, Miao Wang, Fan Zhao, Jiayi Sun, Jun Liu, Dong Zhao
BACKGROUND: Experimental studies have shown that cholesterol-overloaded high-density lipoprotein (HDL) can promote the formation of apolipoprotein E (APOE)-containing HDL, a process correcting the atherogenic function of cholesterol-overloaded HDL. OBJECTIVE: The objective of the study was to explore whether APOE-containing HDL can attenuate the defective impact of cholesterol-overloaded HDL on the development of coronary heart disease (CHD) in humans. METHODS: We measured APOE-HDL cholesterol (APOE-HDLC), HDL cholesterol (HDLC), and HDL particle number in 1112 participants aged 45 to 74 years at baseline in a community-based cohort study...
November 14, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29216624/sildenafil-viagra%C3%A2-prevents-cox-1-txa2-pathway-mediated-vascular-hypercontractility-in-apoe-mice
#16
Marcos A S Leal, Ananda T Dias, Marcella L Porto, Bruna F Brun, Agata L Gava, Silvana S Meyrelles, José Gil-Longo, Manuel Campos-Toimil, Thiago M C Pereira, Elisardo C Vasquez
BACKGROUND/AIMS: The atherosclerotic apolipoprotein E-deficient (apoE-/-) mouse exhibits impaired vasodilation and enhanced vasoconstriction responsiveness. The objectives of this study were: a) to determine the relative contribution of cyclooxygenases (Cox-1 and Cox-2), thromboxane A2 (TXA2) and endothelin-1 (ET-1) to enhancing vascular hyperresponsiveness in this model of atherosclerosis and b) to investigate the beneficial effects of the phosphodiesterase 5 inhibitor sildenafil on this endothelial dysfunction...
December 7, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29216455/seeds-of-destruction-new-mechanistic-insights-into-the-role-of-apolipoprotein-e4-in-alzheimer-s-disease
#17
Robert Vassar
Apolipoprotein E4 (apoE4) is the strongest genetic risk factor for Alzheimer's disease. Despite nearly 25 years of research, the mechanism by which apoE4 confers increased risk for Alzheimer's disease remains enigmatic. In this issue of Neuron, Liu et al. (2017) and Huynh et al. (2017) shed new light on this important question.
December 6, 2017: Neuron
https://www.readbyqxmd.com/read/29216449/apoe4-accelerates-early-seeding-of-amyloid-pathology
#18
Chia-Chen Liu, Na Zhao, Yuan Fu, Na Wang, Cynthia Linares, Chih-Wei Tsai, Guojun Bu
Accumulation and aggregation of amyloid-β (Aβ) in the brain is an initiating step in the pathogenesis of Alzheimer's disease (AD). The ε4 allele of apolipoprotein E (apoE) gene is the strongest genetic risk factor for late-onset AD. Although there is strong evidence showing that apoE4 enhances amyloid pathology, it is not clear what the critical stage(s) is during amyloid development in which apoE4 has the strongest impact. Using apoE inducible mouse models, we show that increased expression of astrocytic apoE4, but not apoE3, during the seeding stage of amyloid development enhanced amyloid deposition and neuritic dystrophy in amyloid model mice...
December 6, 2017: Neuron
https://www.readbyqxmd.com/read/29216448/age-dependent-effects-of-apoe-reduction-using-antisense-oligonucleotides-in-a-model-of-%C3%AE-amyloidosis
#19
Tien-Phat V Huynh, Fan Liao, Caroline M Francis, Grace O Robinson, Javier Remolina Serrano, Hong Jiang, Joseph Roh, Mary Beth Finn, Patrick M Sullivan, Thomas J Esparza, Floy R Stewart, Thomas E Mahan, Jason D Ulrich, Tracy Cole, David M Holtzman
The apolipoprotein E (APOE) gene is the strongest genetic risk factor for late-onset Alzheimer disease. Previous studies suggest that reduction of apoE levels through genetic manipulation can reduce Aβ pathology. However, it is not clear how reduction of apoE levels after birth would affect amyloid deposition. We utilize an antisense oligonucleotide (ASO) to reduce apoE expression in the brains of APP/PS1-21 mice homozygous for the APOE-ε4 or APOE-ε3 allele. ASO treatment starting after birth led to a significant decrease in Aβ pathology when assessed at 4 months...
December 6, 2017: Neuron
https://www.readbyqxmd.com/read/29215758/plin5-deficiency-promotes-atherosclerosis-progression-through-accelerating-inflammation-apoptosis-and-oxidative-stress
#20
Peng-Li Zhou, Min Li, Xin-Wei Han, Yong-Hua Bi, Wen-Guang Zhang, Zheng-Yang Wu, Gang Wu
Excessive plasma triglyceride and cholesterol levels promote the progression of several prevalent cardiovascular risk factors, including atherosclerosis, which is a leading death cause. Perilipin 5 (Plin5), an important perilipin protein, is abundant in tissues with very active lipid catabolism, and is involved in the regulation of oxidative stress. Although, in?ammation and oxidative stress play a critical role in atherosclerosis development, the underlying mechanisms are complex and not completely understood...
December 7, 2017: Journal of Cellular Biochemistry
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