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https://www.readbyqxmd.com/read/27921425/-oxldl-%C3%AE-2-glycoprotein-i-complex-as-a-pro-atherogenic-autoantigen-is-atherosclerosis-an-autoimmune-disease
#1
Pavel Kraml
Oxidation of atherogenic low-density lipoproteins (LDL) plays a key role in the pathogenesis of atherosclerosis. Oxidation stress and inflammation are closely interrelated and they can potentiate one another. In the subendothelial space of the arterial intima, monocytes/macrophages become activated and phagocyte oxidized LDL (oxLDL) via scavenger receptors. It has been demonstrated that oxLDL forms complex with plasma β2-glycoprotein I (β2GPI) and becomes autoantigenic triggering synthesis of specific antiphosholipid antibodies...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27914034/identification-of-oxidized-phosphatidylinositols-present-in-oxldl-and-human-atherosclerotic-plaque
#2
Devin Hasanally, Andrea Edel, Rakesh Chaudhary, Amir Ravandi
Oxidized low-density lipoprotein (OxLDL) plays an important role in initiation and progression of atherosclerosis. Proatherogenic effects of OxLDL have been attributed to bioactive phospholipids generated during LDL oxidation. It is unknown what effect oxidation has on the phosphatidylinositol (PtdIns) molecules in LDL, even though PtdIns is 6% of the total LDL phospholipid pool. We sought to identify and quantitate oxidized phosphatidylinositol (OxPtdIns) species in OxLDL and human atherosclerotic plaque. Bovine liver PtdIns was subjected to non-enzymatic and lipoxygenase-catalyzed oxidation...
December 2, 2016: Lipids
https://www.readbyqxmd.com/read/27909725/lipoprotein-redox-status-evaluation-as-a-marker-of-cardiovascular-disease-risk-in-patients-with-inflammatory-disease
#3
Anca Ungurianu, Denisa Margină, Daniela Grădinaru, Claudia Băcanu, Mihaela Ilie, Christina Tsitsimpikou, Konstantinos Tsarouhas, Demetrios A Spandidos, Aristides M Tsatsakis
Patients with chronic inflammatory disorders (ID) have an increased risk of developing cardiovascular disease, and routinely determined parameters do not reveal the real metabolic status of specific subgroups, such as patients with rheumatoid arthritis (RA). In this study, in order to evaluate state of the art markers for the assessment of cardiometabolic risk, abnormalities in lipoprotein levels in patients with a low‑grade inflammatory status [diabetes mellitus (DM) subgroup] and in patients with a high systemic inflammatory burden (RA subgroup) was determined...
November 28, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27884142/dna-methylation-patterns-associated-with-oxidative-stress-in-an-ageing-population
#4
Åsa K Hedman, Mihkel Zilmer, Johan Sundström, Lars Lind, Erik Ingelsson
BACKGROUND: Oxidative stress has been related to type 2 diabetes (T2D) and cardiovascular disease (CVD), the leading global cause of death. Contributions of environmental factors such as oxidative stress on complex traits and disease may be partly mediated through changes in epigenetic marks (e.g. DNA methylation). Studies relating differential methylation with intermediate phenotypes and disease endpoints may be useful in identifying additional candidate genes and mechanisms involved in disease...
November 25, 2016: BMC Medical Genomics
https://www.readbyqxmd.com/read/27870891/oxldl-and-eldl-induced-membrane-microdomains-in-human-macrophages
#5
Stefan Wallner, Margot Grandl, Gerhard Liebisch, Markus Peer, Evelyn Orsó, Alexander Sigrüner, Andrzej Sobota, Gerd Schmitz
BACKGROUND: Extravasation of macrophages and formation of lipid-laden foam cells are key events in the development and progression of atherosclerosis. The degradation of atherogenic lipoproteins subsequently leads to alterations in cellular lipid metabolism that influence inflammatory signaling. Especially sphingolipids and ceramides are known to be involved in these processes. We therefore analyzed monocyte derived macrophages during differentiation and after loading with enzymatically (eLDL) and oxidatively (oxLDL) modified low-density lipoproteins (LDL)...
2016: PloS One
https://www.readbyqxmd.com/read/27870764/anti-ro-and-concomitant-anti-la-autoantibodies-strongly-associated-with-anti-oxldl-or-anti-phospholipid-antibody-in-systemic-lupus-erythematosus
#6
Biji Theyilamannil Kurien, James Fesmire, Camille Jean Anderson, Robert Hal Scofield
BACKGROUND: Premature atherosclerosis is observed in systemic lupus erythematosus (SLE). Oxidative modification of LDL is associated with atherosclerotic plaque formation. OBJECTIVES: We hypothesized that anti-oxidized LDL (oxLDL) and anti-phospholipid (APL) in SLE sera would segregate with specific antibody subsets, and that anti-oxLDL antibodies will linger in circulation over an extended period. PATIENTS AND METHODS: Sixty-seven SLE and control subjects and two SLE subjects with sera collected longitudinally for 13 years were tested for anti-oxLDL and IgG/IgM/IgA APL antibodies...
December 2016: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/27825356/the-association-between-oxidized-low-density-lipoprotein-antibodies-and-hematological-diseases
#7
Hao Li, Da-Qing Li, Xiang-Xin Li, Lu-Qun Wang
BACKGROUND: The aim of the study is to compare the profiles of antibodies (IgM and IgG) against oxidized low-density lipoprotein (oxLDL) of hematological diseases. METHODS: The serum antibodies of oxLDL-IgM and oxLDL-IgG for 446 cases with hematological diseases and 90 patients with primary hypertension and 90 healthy controls were measured by enzyme-linked immunosorbent assay (ELISA) in a cross-section survey. The association of serum oxLDL-LgM and oxLDL-IgG with hematological diseases was analyzed by multiple linear regression model...
November 8, 2016: Lipids in Health and Disease
https://www.readbyqxmd.com/read/27822126/comparison-of-lipid-profile-parameters-and-oxidized-low-density-lipoprotein-between-normal-and-preeclamptic-pregnancies-in-a-tertiary-care-hospital-in-nepal
#8
Santosh Timalsina, Prajwal Gyawali, Aseem Bhattarai
INTRODUCTION: Preeclampsia is a pregnancy-specific complication that significantly contributes to maternal and perinatal morbidity and mortality worldwide, even more so in developing countries such as Nepal. The potential contribution of dyslipidemia and elevated levels of oxidized low-density lipoprotein (oxLDL) in the pathogenesis of preeclamptic pregnancies has been observed in several studies. The aim of this study was to compare the maternal lipid profile parameters and particularly oxLDL between preeclamptic and healthy pregnancies and also correlate oxLDL with other lipid profile parameters...
2016: International Journal of Women's Health
https://www.readbyqxmd.com/read/27816810/prevention-of-oxldl-uptake-leads-to-decreased-atherosclerosis-in-hematopoietic-npc1-deficient-ldlr-mice
#9
Mike L J Jeurissen, Sofie M A Walenbergh, Tom Houben, Marion J J Gijbels, Jieyi Li, Tim Hendrikx, Yvonne Oligschlaeger, Patrick J van Gorp, Christoph J Binder, Marjo M P C Donners, Ronit Shiri-Sverdlov
BACKGROUND AND AIMS: Atherosclerosis is a chronic inflammatory disease of medium and large vessels and is typically characterized by the predominant accumulation of low-density lipoprotein (LDL)-cholesterol inside macrophages that reside in the vessel walls. Previous studies clearly demonstrated an association specifically between the oxidized type of LDL (oxLDL) and atherosclerotic lesion formation. Further observations revealed that these atherosclerotic lesions displayed enlarged, lipid-loaded lysosomes...
October 20, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27809851/cyclophilin-a-enhances-macrophage-differentiation-and-lipid-uptake-in-high-glucose-conditions-a-cellular-mechanism-for-accelerated-macro-vascular-disease-in-diabetes-mellitus
#10
Surya Ramachandran, Anandan Vinitha, Cheranellore Chandrasekharan Kartha
BACKGROUND: Vascular disease in diabetes is initiated by monocyte adhesion to vascular endothelium, transmigration and formation of foam cells. Increasing clinical evidence supports a role for the secretory protein, cyclophilin A in diabetic vascular disease. The means by which cyclophilin A contributes to vascular lesion development in diabetes is however largely unknown. METHODS: In this study we investigated using THP1 cells and human monocytes whether cyclophilin A under hyperglycemic conditions, functions in the inflammatory cascade as a chemoattractant and increases lipid uptake by formation of foam cells invitro...
November 3, 2016: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/27808249/apoa-i-mimetic-administration-but-not-increased-apoa-i-containing-hdl-inhibits-tumour-growth-in-a-mouse-model-of-inherited-breast-cancer
#11
Lídia Cedó, Annabel García-León, Lucía Baila-Rueda, David Santos, Victor Grijalva, Melanie Raquel Martínez-Cignoni, José M Carbó, Jari Metso, Laura López-Vilaró, Antonio Zorzano, Annabel F Valledor, Ana Cenarro, Matti Jauhiainen, Enrique Lerma, Alan M Fogelman, Srinivasa T Reddy, Joan Carles Escolà-Gil, Francisco Blanco-Vaca
Low levels of high-density lipoprotein cholesterol (HDLc) have been associated with breast cancer risk, but several epidemiologic studies have reported contradictory results with regard to the relationship between apolipoprotein (apo) A-I and breast cancer. We aimed to determine the effects of human apoA-I overexpression and administration of specific apoA-I mimetic peptide (D-4F) on tumour progression by using mammary tumour virus-polyoma middle T-antigen transgenic (PyMT) mice as a model of inherited breast cancer...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27807992/radiation-induced-surge-of-macrophage-foam-cell-formation-oxidative-damage-and-cytokine-release-is-attenuated-by-a-nanoformulation-of-curcumin
#12
Behrooz Soltani, Narges Bodaghabadi, Nasser Ghaemi, Majid Sadeghizadeh
PURPOSE: We examined the potential of a dendrosomal nanoformulation of curcumin (DNC) for intervention of ionizing radiation (IR)-induced damage (particularly leading to atherosclerosis), employing an irradiated THP-1 macrophage model. MATERIALS AND METHODS: Differentiated THP-1 macrophages were irradiated and treated with curcumin or DNC nanoformulation (and oxidized low density lipoprotein, ox-LDL, to promote foam cells). Chemical, biochemical, and genetics tools including viability and apoptosis, multiple ELISA, real-time PCR, Western blotting, enzyme activity, and fluorimetry assays were employed to illustrate IR damage as well as the DNC intervention potential...
November 3, 2016: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/27801365/oxidative-stress-parameters-and-inflammatory-and-immune-mediators-as-markers-of-the-severity-of-sepsis
#13
Isil Bavunoglu, Habibe Genc, Dildar Konukoglu, Hayriye Cicekci, Volkan Sozer, Remise Gelisgen, Hafize Uzun
INTRODUCTION: Sepsis is a complex inflammatory syndrome with diverse etiology and wide spectrum of severity. The aim of this study was to investigate whether inflammatory mediators, in comparison with oxidative parameters, are associated with severity of sepsis. METHODOLOGY: Plasma neopterin, adenosine deaminase (ADA), vascular cell adhesion molecule (VCAM), intracellular adhesion molecule (ICAM), interleukin (IL)-1, IL-6, and tumor necrosis factor alpha (TNF-α), as inflammatory mediators, and serum nitric oxide (NOx), nitrotyrosine (NT), oxidized LDL (oxLDL) levels, serum paraoxonase 1 (PON1) activity, and erythrocyte glutathione (GSH) levels as oxidative stress parameters of 12 patients with mild sepsis, 25 patients with severe sepsis, and 20 healthy control subjects were evaluated...
October 31, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27793203/the-use-of-probiotic-l-fermentum-me-3-containing-reg-activ-cholesterol-supplement-for-4%C3%A2-weeks-has-a-positive-influence-on-blood-lipoprotein-profiles-and-inflammatory-cytokines-an-open-label-preliminary-study
#14
Tiiu Kullisaar, Kersti Zilmer, Tiit Salum, Aune Rehema, Mihkel Zilmer
BACKGROUND: Cardiovascular diseases continue to be a challenge and burden to heath. The incidence of type 2 diabetes is increasing. Modifying the (common) risk factors of them is the key of longterm success. The aim of the study was to establish if the special composition of innovative food supplement Reg'Activ Cholesterol (RAC) has a positive influence to the human body cardiovascular-inflammatory and diabetic parameters. METHODS: Forty-five clinically asymptomatic participants consumed an RAC containing an antioxidative and antiatherogenic probiotic Lactobacillus fermentum ME-3 (LFME-3) for 4 weeks...
October 28, 2016: Nutrition Journal
https://www.readbyqxmd.com/read/27784857/developmental-endothelial-locus-1-del-1-inhibits-oxidized-low-density-lipoprotein-activity-by-direct-binding-and-its-overexpression-attenuates-atherogenesis-in-mice
#15
Akemi Kakino, Yoshiko Fujita, Atsushi Nakano, Sayaka Horiuchi, Tatsuya Sawamura
BACKGROUND: Modified low-density lipoprotein (LDL) binding to scavenger receptors has been implicated in atherosclerosis. It is hypothesized that a third molecule may affect modified LDL binding, therefore, this study focuses on the soluble endogenous protein, developmental endothelial locus-1 (Del-1), as an inhibitor of oxidized LDL (oxLDL) interactions.Methods and Results:Del-1 preferentially bound oxLDL over native LDL in a cell-free binding assay. Del-1 also inhibited DiI-labeled oxLDL uptake by scavenger receptors irrespective of the receptor type (LOX-1, SR-AI, CD36, or SR-BI) expressed in COS-7 cells, and independent of cell type (human coronary artery endothelial cells (HCAECs) or THP-1-derived macrophages)...
October 26, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/27776344/baicalein-protects-against-oxldl-caused-oxidative-stress-and-inflammation-by-modulation-of-ampk-alpha
#16
Kun-Ling Tsai, Ching-Hsia Hung, Shih-Hung Chan, Jhih-Yuan Shih, Yung-Hsin Cheng, Yi-Ju Tsai, Huei-Chen Lin, Pei-Ming Chu
Atherosclerosis is considered to be a form of chronic inflammation and a disorder of lipid metabolism. Oxidative transformations in the lipid and apolipoprotein B (Apo B) constituent of low density lipoprotein drive the initial step in atherogenesis due to macrophage scavenger receptors identify oxidized LDL (oxLDL) but non-oxidized LDL. The human vascular endothelial cells fact a critical role in vasodilation, provides a nonadhesive surface for circulation, reduces vascular smooth muscle proliferation, inflammation, thrombus formation and platelet aggregation...
October 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/27740536/treatment-of-hiv-infection-with-a-raltegravir-based-regimen-increases-ldl-levels-but-improves-hdl-cholesterol-efflux-capacity
#17
Nicholas T Funderburg, Dihua Xu, Martin P Playford, Aditya A Joshi, Adriana Andrade, Daniel R Kuritzkes, Michael M Lederman, Nehal N Mehta
BACKGROUND: Persons infected with HIV often have altered lipid profiles that may be affected by antiretroviral therapies (ART). Traditional lipid measurements may be insufficient to assess cardiovascular disease (CVD) risk in this population. METHODS: We report results from 39 ART-naïve participants in a substudy of A5248, a single-arm study of raltegravir (RAL), emtricitabine/tenofovir administration. Samples were collected at baseline, 12, 24, and 48 weeks after ART initiation...
October 14, 2016: Antiviral Therapy
https://www.readbyqxmd.com/read/27733422/in-vitro-experimental-model-of-trained-innate-immunity-in-human-primary-monocytes
#18
Siroon Bekkering, Bastiaan A Blok, Leo A B Joosten, Niels P Riksen, Reinout van Crevel, Mihai G Netea
Innate immune memory, or trained immunity, has recently been described to be an important property of cells of the innate immune system. Due to the increased interest in this important new field of immunological investigation, we sought to determine the optimal conditions for an in vitro experimental protocol of monocyte training using three of the most commonly used training stimuli from the literature: β-glucan, the bacillus Calmette-Guérin (BCG) vaccine, and oxidized low-density lipoprotein (oxLDL). We investigated and optimized a protocol of monocyte trained immunity induced by an initial training period with β-glucan, BCG, or oxLDL, followed by washing and resting of the cells and, thereafter, restimulation with secondary bacterial stimuli...
December 2016: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/27727291/early-transcriptomic-response-to-ldl-and-oxldl-in-human-vascular-smooth-muscle-cells
#19
Salvador Damián-Zamacona, Paola Toledo-Ibelles, Mabel Z Ibarra-Abundis, Laura Uribe-Figueroa, Enrique Hernández-Lemus, Karla Paola Macedo-Alcibia, Blanca Delgado-Coello, Jaime Mas-Oliva, Juan Pablo Reyes-Grajeda
BACKGROUND: Although nowadays it is well known that the human transcriptome can importantly vary according to external or environmental condition, the reflection of this concept when studying oxidative stress and its direct relationship with gene expression profiling during the process of atherogenesis has not been thoroughly achieved. OBJECTIVE: The ability to analyze genome-wide gene expression through transcriptomics has shown that the genome responds dynamically to diverse stimuli...
2016: PloS One
https://www.readbyqxmd.com/read/27707453/proprietary-tomato-extract-improves-metabolic-response-to-high-fat-meal-in-healthy-normal-weight-subjects
#20
Xavier Deplanque, Delphine Muscente-Paque, Eric Chappuis
BACKGROUND: Low-density lipoprotein (LDL) oxidation is a risk factor for atherosclerosis. Lycopene and tomato-based products have been described as potent inhibitors of LDL oxidation. OBJECTIVES: To evaluate the effect of a 2-week supplementation with a carotenoid-rich tomato extract (CRTE) standardized for a 1:1 ratio of lycopene and phytosterols, on post-prandial LDL oxidation after a high-fat meal. DESIGN: In a randomized, double-blind, parallel-groups, placebo-controlled study, 146 healthy normal weight individuals were randomly assigned to a daily dose of CRTE standardized for tomato phytonutrients or placebo during 2 weeks...
2016: Food & Nutrition Research
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