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Triglyceride-Rich Lipoproteins

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https://www.readbyqxmd.com/read/28899419/increased-plasma-lipid-levels-exacerbate-muscle-pathology-in-the-mdx-mouse-model-of-duchenne-muscular-dystrophy
#1
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/28893538/indispensable-role-of-lipoprotein-bound-apoe-in-adipogenesis-and-endocytosis-induced-by-postprandial-trl
#2
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/28887086/the-effects-of-cinnamon-supplementation-on-blood-lipid-concentrations-a-systematic-review-and-meta-analysis
#3
Serban M Maierean, Maria-Corina Serban, Amirhossein Sahebkar, Sorin Ursoniu, Alexandru Serban, Peter Penson, Maciej Banach
BACKGROUND: Cinnamon is a rich botanical source of polyphenols, whose positive effects on blood lipid concentrations have been hypothesized, but have not been conclusively studied. OBJECTIVE: The objective of the study was to systematically review and evaluate the effect of administration of cinnamon on blood lipid concentrations. METHODS: We assessed 13 randomized controlled trials with 750 participants investigating the effect of cinnamon supplementation on blood lipid concentrations...
August 12, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28829998/alterations-in-plasma-triglycerides-lipolysis-in-patients-with-history-of-multifactorial-chylomicronemia
#4
Oriane Marmontel, Mathilde Di Filippo, Christophe Marcais, Séverine Nony, Marjorie Dumoux, Marine Serveaux-Dancer, Cyrielle Caussy, Sybil Charrière, Philippe Moulin
BACKGROUND AND AIMS: The heterogeneity and mechanisms of multifactorial chylomicronemia (MCM) remain poorly understood. To gain new insights, post heparin lipolysis measured at 60 min (PHLA60), in addition to the more commonly used 10 min (PHLA10), was assessed in patients with history of MCM. METHODS: 62 consecutive MCM patients were studied. The evaluation included LPL, APOC2, APOA5, GPIHBP1, LMF1 and APOE gene sequencing, as well as pre- and post-heparin injection biochemical analysis, including lipid profiles, determination of apolipoprotein B, B-48, CII, CIII, lipoprotein lipase (LPL) concentrations (LPLC0, LPLC10 and LPLC60) and post-heparin LPL activity (PHLA10 and PHLA60)...
July 29, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28829977/hdl-subclasses-and-the-common-cetp-taqib-variant-predict-the-incidence-of-microangiopatic-complications-in-type-2-diabetic-women-a-9years-follow-up-study
#5
Giuseppina T Russo, Annalisa Giandalia, Elisabetta L Romeo, Marco Muscianisi, Maria Concetta Ruffo, Angela Alibrandi, Alessandra Bitto, Fiorella Forte, Andrea Grillone, Bela Asztalos, Domenico Cucinotta
AIMS: Diabetic kidney disease (DKD) and retinopathy (DR) develop in a considerable number of subjects with Type 2 Diabetes (T2D) despite the achievement of the recommended targets for glycaemia and blood pressure. Atherogenic dyslipidemia may play a relevant role, especially in T2DM women. METHODS: We report our findings on the effect of diabetic dyslipidaemia, the HDL subclasses distribution and the common cholesteryl ester transfer protein (CETP)TaqIB variant on the incidence or the progression of DKD and DR in 97 T2D women, after a ∼9years of follow-up...
July 28, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28825717/a-human-apoc3-missense-variant-and-monoclonal-antibody-accelerate-apoc-iii-clearance-and-lower-triglyceride-rich-lipoprotein-levels
#6
Sumeet A Khetarpal, Xuemei Zeng, John S Millar, Cecilia Vitali, Amritha Varshini Hanasoge Somasundara, Paolo Zanoni, James A Landro, Nicole Barucci, William J Zavadoski, Zhiyuan Sun, Hans de Haard, Ildikó V Toth, Gina M Peloso, Pradeep Natarajan, Marina Cuchel, Sissel Lund-Katz, Michael C Phillips, Alan R Tall, Sekar Kathiresan, Paul DaSilva-Jardine, Nathan A Yates, Daniel J Rader
Recent large-scale genetic sequencing efforts have identified rare coding variants in genes in the triglyceride-rich lipoprotein (TRL) clearance pathway that are protective against coronary heart disease (CHD), independently of LDL cholesterol (LDL-C) levels. Insight into the mechanisms of protection of these variants may facilitate the development of new therapies for lowering TRL levels. The gene APOC3 encodes apoC-III, a critical inhibitor of triglyceride (TG) lipolysis and remnant TRL clearance. Here we report a detailed interrogation of the mechanism of TRL lowering by the APOC3 Ala43Thr (A43T) variant, the only missense (rather than protein-truncating) variant in APOC3 reported to be TG lowering and protective against CHD...
September 2017: Nature Medicine
https://www.readbyqxmd.com/read/28814891/diabetes-and-dyslipidemia-characterizing-lipoprotein-metabolism
#7
REVIEW
G H Tomkin, D Owens
Premature atherosclerosis in diabetes accounts for much of the decreased life span. New treatments have reduced this risk considerably. This review explores the relationship among the disturbances in glucose, lipid, and bile salt metabolic pathways that occur in diabetes. In particular, excess nutrient intake and starvation have major metabolic effects, which have allowed us new insights into the disturbance that occurs in diabetes. Metabolic regulators such as the forkhead transcription factors, the farnesyl X transcription factors, and the fibroblast growth factors have become important players in our understanding of the dysregulation of metabolism in diabetes and overnutrition...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/28814394/dynamics-of-intrapericardial-and-extrapericardial-fat-tissues-during-long-term-dietary-induced-moderate-weight-loss
#8
Gal Tsaban, Arik Wolak, Hila Avni-Hassid, Yftach Gepner, Ilan Shelef, Yaakov Henkin, Dan Schwarzfuchs, Noa Cohen, Nitzan Bril, Michal Rein, Dana Serfaty, Shira Kenigsbuch, Lilac Tene, Hila Zelicha, Anat Yaskolka-Meir, Oded Komy, Avital Bilitzky, Yoash Chassidim, Uta Ceglarek, Michael Stumvoll, Matthias Blüher, Joachim Thiery, Dror Dicker, Assaf Rudich, Meir J Stampfer, Iris Shai
Background: In view of evidence linking pericardial fat accumulation with increased cardiovascular disease risk, strategies to reduce its burden are needed. Data comparing the effects of specific long-term dietary interventions on pericardial fat tissue mobilization are sparse.Objective: We sought to evaluate intrapericardial-fat (IPF) and extrapericardial-fat (EPF) changes during weight-loss interventions by different dietary regimens.Design: During 18 mo of a randomized controlled trial, we compared a Mediterranean/low-carbohydrate (MED/LC) diet plus 28 g walnuts/d with a calorically equal low-fat (LF) diet among randomly assigned participants with moderate abdominal obesity...
August 16, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28797250/omega-3-fatty-acids-eicosapentaenoic-acid-and-docosahexaenoic-acid-and-their-mechanisms-of-action-on-apolipoprotein-b-containing-lipoproteins-in-humans-a-review
#9
REVIEW
Jan Oscarsson, Eva Hurt-Camejo
BACKGROUND: Epidemiological and genetic studies suggest that elevated triglyceride (TG)-rich lipoprotein levels in the circulation increase the risk of cardiovascular disease. Prescription formulations of omega-3 fatty acids (OM3FAs), mainly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), reduce plasma TG levels and are approved for the treatment of patients with severe hypertriglyceridemia. Many preclinical studies have investigated the TG-lowering mechanisms of action of OM3FAs, but less is known from clinical studies...
August 10, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28751575/effects-of-intranasal-insulin-on-triglyceride-rich-lipoprotein-particle-production-in-healthy-men
#10
RANDOMIZED CONTROLLED TRIAL
Changting Xiao, Satya Dash, Priska Stahel, Gary F Lewis
OBJECTIVE: Insulin administered directly into the brain acutely suppresses hepatic glucose production and triglyceride-rich lipoprotein (TRL) secretion in rodents. In addition, intranasally administered insulin, which selectively raises cerebrospinal fluid insulin concentration, suppresses hepatic glucose production in humans; however, its effect on TRL secretion in humans has not previously been examined. In this study, we examined whether intranasal insulin, administered at a dose that has previously been shown to suppress hepatic glucose production, modulates TRL particle secretion by the liver and intestine in humans...
September 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28733727/low-density-lipoproteins-investigated-under-high-hydrostatic-pressure-by-elastic-incoherent-neutron-scattering
#11
J Peters, N Martinez, B Lehofer, R Prassl
Human low-density lipoprotein (LDL) is a highly complex nano-particle built up of various lipid classes and a single large protein moiety (apoB-100) owning essential physiological functions in the human body. Besides its vital role as a supplier of cholesterol and fat for peripheral tissues and cells, it is also a known key player in the formation of atherosclerosis. Due to these important roles in physiology and pathology the elucidation of structural and dynamical details is of great interest. In the current study we drew a broader picture of LDL dynamics using elastic incoherent neutron scattering (EINS) as a function of specified temperature and pressure points...
July 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28731787/effect-of-euterpe-oleracea-mart-a%C3%A3-a%C3%A3-oil-on-dyslipidemia-caused-by-cocos-nucifera-l-saturated-fat-in-wistar-rats
#12
Belmira S Faria E Souza, Helison O Carvalho, Talisson Taglialegna, Albenise Santana A Barros, Edilson Leal da Cunha, Irlon Maciel Ferreira, Hady Keita, Andres Navarrete, José Carlos Tavares Carvalho
Dyslipidemia is caused by disturbances in lipid metabolism that lead to chronic elevations of serum lipids, especially low-density lipoprotein (LDL)-cholesterol and triglycerides, increasing the risk of metabolic syndrome, obesity, diabetes, atherogenic processes, and cardiovascular diseases. The oil from the fruits of Euterpe oleracea (OFEO) is rich in unsaturated fatty acids with potential for treating alterations in lipid metabolism. In this study, we aimed to investigate the effect of OFEO on hyperlipidemia induced by Cocos nucifera L...
September 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28702990/relationship-between-amphipathic-%C3%AE-structures-in-the-%C3%AE-1-domain-of-apolipoprotein-b-and-the-properties-of-the-secreted-lipoprotein-particles-in-mca-rh7777-cells
#13
COMPARATIVE STUDY
Medha Manchekar, Richa Kapil, Zhihuan Sun, Jere P Segrest, Nassrin Dashti
Our previous studies demonstrated that the first 1000 amino acid residues (the βα1 domain) of human apolipoprotein (apo) B-100, termed apoB:1000, are required for the initiation of lipoprotein assembly and the formation of a monodisperse stable phospholipid (PL)-rich particle. The objectives of this study were (a) to assess the effects on the properties of apoB truncates undergoing sequential inclusion of the amphipathic β strands in the 700 N-terminal residues of the β1 domain of apoB-100 and (b) to identify the subdomain in the β1 domain that is required for the formation of a microsomal triglyceride transfer protein (MTP)-dependent triacylglycerol (TAG)-rich apoB-containing particle...
August 8, 2017: Biochemistry
https://www.readbyqxmd.com/read/28701354/pleiotropic-effects-of-apolipoprotein-c3-on-hdl-functionality-and-adipose-tissue-metabolic-activity
#14
Evangelia Zvintzou, Marie Lhomme, Stella Chasapi, Serafoula Filou, Vassilis Theodoropoulos, Eva Xapapadaki, Anatol Kontush, George Spyroulias, Constantinos C Tellis, Alexandros D Tselepis, Caterina Constantinou, Kyriakos E Kypreos
APOC3 is produced mainly by the liver and intestine and approximately half of plasma APOC3 associates with HDL. Though it was believed that APOC3 associates with HDL by simple binding to preexisting particles, recent data support that biogenesis of APOC3-containing HDL (APOC3-HDL) requires Abca1. Moreover, APOC3-HDL contributes to plasma triglyceride homeostasis by preventing APOC3 association with triglyceride-rich lipoproteins. Interestingly, APOC3-HDL also shows positive correlation with the morbidly obese phenotype...
September 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28694296/apolipoprotein-c-iii-inhibits-triglyceride-hydrolysis-by-gpihbp1-bound-lpl
#15
Mikael Larsson, Christopher M Allan, Rachel S Jung, Patrick J Heizer, Anne P Beigneux, Stephen G Young, Loren G Fong
apoC-III is often assumed to retard the intravascular processing of triglyceride-rich lipoproteins (TRLs) by inhibiting LPL, but that view is based largely on studies of free LPL. We now recognize that intravascular LPL is neither free nor loosely bound, but instead is tightly bound to glycosylphosphatidylinositol-anchored HDL-binding protein 1 (GPIHBP1) on endothelial cells. Here, we revisited the effects of apoC-III on LPL, focusing on apoC-III's capacity to affect the activity of GPIHBP1-bound LPL. We found that TRLs from APOC3 transgenic mice bound normally to GPIHBP1-bound LPL on cultured cells in vitro and to heart capillaries in vivo...
September 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28692480/association-of-plasminogen-activator-inhibitor-1-and-low-density-lipoprotein-heterogeneity-as-a-risk-factor-of-atherosclerotic-cardiovascular-disease-with-triglyceride-metabolic-disorder-a-pilot-cross-sectional-study
#16
Kiyoshi Iida, Shigemasa Tani, Wataru Atsumi, Tsukasa Yagi, Kenji Kawauchi, Naoya Matsumoto, Atsushi Hirayama
BACKGROUND: We hypothesized that an increase in plasminogen activator inhibitor 1 (PAI-1) might reduce low-density lipoprotein (LDL) particle size in conjunction with triglyceride (TG) metabolism disorder, resulting in an increased risk of atherosclerotic cardiovascular disease (ASCVD). METHODS: This study was carried out as a hospital-based cross-sectional study in 537 consecutive outpatients (mean age: 64 years; men: 71%) with one or more risk factors for ASCVD from April 2014 to October 2014 at the Cardiovascular Center of Nihon University Surugadai Hospital...
July 7, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28662934/high-triglycerides-and-low-high-density-lipoprotein-cholesterol-lipid-profile-in-rheumatoid-arthritis-a-potential-link-among-inflammation-oxidative-status-and-dysfunctional-high-density-lipoprotein
#17
Javier Rodríguez-Carrio, Mercedes Alperi-López, Patricia López, Raquel López-Mejías, Sara Alonso-Castro, Francisco Abal, Francisco J Ballina-García, Miguel Á González-Gay, Ana Suárez
BACKGROUND: The interactions between inflammation and lipid profile in rheumatoid arthritis (RA) are poorly understood. The lipid profile study in RA has been biased toward lipoprotein levels, whereas those of triglycerides (TGs) and lipoprotein functionality have been underestimated. OBJECTIVES: Since recent findings suggest a role for TG and TG-rich lipoproteins (TRL) on inflammation, we aimed to evaluate a combined lipid profile characterized by high TG and low high-density lipoprotein cholesterol levels (TG(high)HDL(low)) in RA...
June 3, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28634822/the-ratio-of-eicosapentaenoic-acid-epa-to-arachidonic-acid-may-be-a-residual-risk-marker-in-stable-coronary-artery-disease-patients-receiving-treatment-with-statin-following-epa-therapy
#18
Shigemasa Tani, Ken Nagao, Kenji Kawauchi, Tsukasa Yagi, Wataru Atsumi, Rei Matsuo, Atsushi Hirayama
BACKGROUND: We investigated the relationship between the eicosapentaenoic acid (EPA)/arachidonic acid (AA) ratio and non-high-density lipoprotein cholesterol (non-HDL-C) level, a major residual risk of coronary artery disease (CAD), in statin-treated CAD patients following EPA therapy. METHODS: We conducted a 6-month, prospective, randomized clinical trial to investigate the effect of the additional administration of EPA on the EPA/AA ratio and the serum non-HDL-C level in stable CAD patients receiving statin treatment...
June 20, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/28625343/short-term-cooling-increases-serum-triglycerides-and-small-high-density-lipoprotein-levels-in-humans
#19
Geerte Hoeke, Kimberly J Nahon, Leontine E H Bakker, Sabine S C Norkauer, Donna L M Dinnes, Maaike Kockx, Laeticia Lichtenstein, Diana Drettwan, Anne Reifel-Miller, Tamer Coskun, Philipp Pagel, Fred P H T M Romijn, Christa M Cobbaert, Ingrid M Jazet, Laurent O Martinez, Leonard Kritharides, Jimmy F P Berbée, Mariëtte R Boon, Patrick C N Rensen
BACKGROUND: Cold exposure and β3-adrenergic receptor agonism, which both activate brown adipose tissue, markedly influence lipoprotein metabolism by enhancing lipoprotein lipase-mediated catabolism of triglyceride-rich lipoproteins and increasing plasma high-density lipoprotein (HDL) levels and functionality in mice. However, the effect of short-term cooling on human lipid and lipoprotein metabolism remained largely elusive. OBJECTIVE: The objective was to assess the effect of short-term cooling on the serum lipoprotein profile and HDL functionality in men...
May 3, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28619195/association-of-triglyceride-related-genetic-variants-with-mitral%C3%A2-annular%C3%A2-calcification
#20
RANDOMIZED CONTROLLED TRIAL
Mehdi Afshar, Kevin Luk, Ron Do, Line Dufresne, David S Owens, Tamara B Harris, Gina M Peloso, Kathleen F Kerr, Quenna Wong, Albert V Smith, Mathew J Budoff, Jerome I Rotter, L Adrienne Cupples, Stephen S Rich, James C Engert, Vilmundur Gudnason, Christopher J O'Donnell, Wendy S Post, George Thanassoulis
BACKGROUND: Mitral annular calcium (MAC), commonly identified by cardiac imaging, is associated with cardiovascular events and predisposes to the development of clinically important mitral valve regurgitation and mitral valve stenosis. However, its biological determinants remain largely unknown. OBJECTIVES: The authors sought to evaluate whether a genetic predisposition to elevations in plasma lipids is associated with the presence of MAC. METHODS: The authors used 3 separate Mendelian randomization techniques to evaluate the associations of lipid genetic risk scores (GRS) with MAC in 3 large patient cohorts: the Framingham Health Study, MESA (Multiethnic European Study of Atherosclerosis), and the AGE-RS (Age, Gene/Environment Susceptibility-Reykjavik Study)...
June 20, 2017: Journal of the American College of Cardiology
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