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https://www.readbyqxmd.com/read/28340366/effect-of-ezetimibe-on-low-and-high-density-lipoprotein-subclasses-in-sitosterolemia
#1
Rgia A Othman, Semone B Myrie, David Mymin, Jean-Baptiste Roullet, Robert D Steiner, Peter J H Jones
BACKGROUND AND AIMS: Sitosterolemia displays high plasma total sterols [high plant sterols (PS) + normal to high total cholesterol (TC)] with normal to moderately elevated low-density lipoprotein (LDL) levels. High LDL, intermediate-density lipoprotein (IDL) and very low-density lipoprotein (VLDL) particles, low high-density lipoprotein (HDL), and increased non-HDL and the ratios of TC and triglycerides (TG) to HDL can increase the risk for atherosclerosis. Ezetimibe (EZE) can reduce plasma PS and TC levels in sitosterolemia, but its effect on lipoprotein subclasses has not been previously reported...
March 10, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28329241/lipoprotein-a-the-revenant
#2
Baris Gencer, Florian Kronenberg, Erik S Stroes, François Mach
In the mid-1990s, the days of lipoprotein(a) [Lp(a)] were numbered and many people would not have placed a bet on this lipid particle making it to the next century. However, genetic studies brought Lp(a) back to the front-stage after a Mendelian randomization approach used for the first time provided strong support for a causal role of high Lp(a) concentrations in cardiovascular disease and later also for aortic valve stenosis. This encouraged the use of therapeutic interventions to lower Lp(a) as well numerous drug developments, although these approaches mainly targeted LDL cholesterol, while the Lp(a)-lowering effect was only a 'side-effect'...
February 17, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28301372/news-on-the-molecular-regulation-and-function-of-hepatic-low-density-lipoprotein-receptor-and-ldlr-related-protein-1
#3
Bart van de Sluis, Melinde Wijers, Joachim Herz
PURPOSE OF REVIEW: Clearing of atherogenic lipoprotein particles by the liver requires hepatic low-density lipoprotein receptor (LDLR) and LDLR-related protein 1 (LRP1). This review highlights recent studies that have expanded our understanding of the molecular regulation and metabolic functions of LDLR and LRP1 in the liver. RECENT FINDINGS: Various proteins orchestrate the intracellular trafficking of LDLR and LRP1. After internalization, the receptors are redirected via recycling endosomes to the cell surface...
March 15, 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28300080/hypertriglyceridaemia-and-risk-of-coronary-artery-disease
#4
REVIEW
Željko Reiner
An elevated serum level of LDL cholesterol is a well-known risk factor for cardiovascular disease (CVD), but the role of elevated triglyceride levels is debated. Controversies regarding hypertriglyceridaemia as an independent risk factor for CVD have occurred partly because elevated triglyceride levels are often a component of atherogenic dyslipidaemia - they are associated with decreased levels of HDL cholesterol and increased levels of small dense LDL particles, which are highly atherogenic. Findings from several large studies indicate that elevated levels of triglycerides (either fasting or nonfasting) or, more specifically, triglyceride-rich lipoproteins and their remnants, are independently associated with increased risk of CVD...
March 16, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28291054/progression-of-atherosclerosis-in-hiv-infected-individuals-prospective-data-from-an-asian-cohort
#5
Grace Lui, Ronald Cw Ma, Ping Chook, Chun-Kwok Wong, Claudia Ht Tam, Michael Hm Chan, Shui-Shan Lee, Rity Yk Wong, Catherine Sk Cheung, Kin-Wing Choi, Ping-Chung Leung, Ka-Hing Wong, Kenny Cw Chan, Nelson Lee
BACKGROUND: The magnitude and risk factors of progression of atherosclerosis in Asian HIV-infected individuals were unknown. This study aimed to evaluate: (1) the rate of progression of atherosclerosis in HIV-infected individuals, and (2) metabolic and inflammatory parameters that may predict atherosclerosis progression in HIV-infected individuals in an Asian cohort. SETTING: A prospective, longitudinal study was performed among adults attending an HIV Metabolic clinic in Hong Kong...
March 10, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28290840/-elevated-lipoprotein-a-cncentration-and-presence-of-subfractions-of-small-dense-low-density-lipoproteins-as-independent-factors-of-risk-of-ischemic-heart-disease
#6
O I Afanasieva, E A Utkina, N V Artemieva, M V Ezhov, I Yu Adamova, S N Pokrovsky
AIM: To study relation of lipoproteina - Lp(a) and subfractional composition of apoB containing lipoproteins to the presence of ischemic heart disease (IHD). Manerial and methods. Parameters of lipid spectrum, Lp(a), and subfractions of apoB containing lipoproteins were determined in blood serum of 187 patients with known data of instrumental examination. RESULTS: Lp(a) concentration was not linked to any of risk factors, levels total cholesterol (TC), low and high density lipoprotein CH, and subfractions of lipoproteins...
June 2016: Kardiologiia
https://www.readbyqxmd.com/read/28279074/oxidized-derivatives-of-linoleic-acid-in-pediatric-metabolic-syndrome-is-their-pathogenic-role-modulated-by-the-genetic-background-and-the-gut-microbiota
#7
Domenico Trico, Anna Di Sessa, Sonia Caprio, Naga Chalasani, Wanqing Liu, Tiebing Liang, Joerg Graf, Raimund Herzog, Casey D Johnson, Giuseoppina Rosaria Umano, Ariel Feldstein, Nicola Santoro
AIMS: We tested whether oxidized metabolites of linoleic acid (OXLAM) are associated with pediatric metabolic syndrome (MetS) and a pro-atherogenic lipoprotein profile in 122 obese adolescents. Furthermore, we examined whether genetic and metagenomic factors can modulate plasma OXLAM concentrations by genotyping the Fatty Acid Desaturase 1/2 (FADS) gene and by characterizing the gut microbiota. RESULTS: Subjects with MetS (n=50) showed higher concentrations of 9- and 13-oxooctadecadienoic acid (9- and 13-oxo-ODE) than subjects without MetS (n=72)...
March 9, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28260912/association-of-uremic-pruritus-in-hemodialysis-patients-with-the-number-of-days-of-high-mean-24-hour-particulate-matter-with-a-diameter-of-2-5-%C3%AE-m
#8
Ming-Hui Liu, Ming-Jen Chan, Ching-Wei Hsu, Cheng-Hao Weng, Tzung-Hai Yen, Wen-Hung Huang
Uremic pruritus (UP) is a common and incapacitating symptom in patients undergoing hemodialysis (HD). The pathogenesis of UP is multifactorial and complex. Particulate matter (PM), a major air pollutant, is a mixture of particles with various chemical compositions. PM is associated with several allergic diseases, including dermatitis. To assess the role of PM (PM with a diameter of <10 μm [PM10] and PM with a diameter of <2.5 μm [PM2.5]) and other clinical variables in UP in patients on HD, we recruited 866 patients on maintenance HD (MHD)...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28255216/analysis-of-apolipoprotein-b-protein-of-circulating-multiple-modified-low-density-lipoprotein
#9
Emile R Zakiev, Vasily N Sukhorukov, Ekaterina A Ivanova, Alexander N Orekhov
Modified low-density lipoprotein (LDL) is the main source of lipid accumulation in the arterial wall affected by atherosclerosis. We aimed to compare the properties of apolipoprotein B (apoB) from native and modified LDL. Modified (desialylated) LDL and native LDL were extracted from blood of atherosclerotic patients. We characterized apoB structure of LDL particles in total LDL preparation, circulating modified LDL (cmLDL), and native LDL. Intact cmLDL had a twofold lower content of free amino groups than native LDL...
March 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28223836/dyslipidemia-in-patients-with-chronic-kidney-disease-etiology-and-management
#10
REVIEW
Ivana Mikolasevic, Marta Žutelija, Vojko Mavrinac, Lidija Orlic
Patients with chronic kidney disease (CKD), including those with end-stage renal disease, treated with dialysis, or renal transplant recipients have an increased risk for cardiovascular disease (CVD) morbidity and mortality. Dyslipidemia, often present in this patient population, is an important risk factor for CVD development. Specific quantitative and qualitative changes are seen at different stages of renal impairment and are associated with the degree of glomerular filtration rate declining. Patients with non-dialysis-dependent CKD have low high-density lipoproteins (HDL), normal or low total cholesterol (TC) and low-density lipoprotein (LDL) cholesterol, increased triglycerides as well as increased apolipoprotein B (apoB), lipoprotein(a) (Lp (a)), intermediate- and very-low-density lipoprotein (IDL, VLDL; "remnant particles"), and small dense LDL particles...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28217509/relevance-of-the-triglyceride-to-high-density-lipoprotein-cholesterol-ratio-as-an-important-lipid-fraction-in-apparently-healthy-young-and-middle-aged-indian-men
#11
Aparna Kohli, Anupa Siddhu, Ravindra M Pandey, K Srinath Reddy
CONTEXT: Cardiovascular disease (CVD) is the largest cause of mortality in Indians. Insulin resistance and related dyslipidemia of increased triglyceride (TG), small dense low-density lipoprotein (sd-LDL) particles, and decreased high-density lipoprotein-cholesterol (HDL-C) are associated with increased risk of CVD. TG/HDL-C ratio could be a potential surrogate marker for this South Asian phenotype. Data are scarce on the relevance of TG/HDL-C ratio as a useful lipid marker among Indians...
January 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28207870/impaired-hdl2-mediated-cholesterol-efflux-is-associated-with-metabolic-syndrome-in-families-with-early-onset-coronary-heart-disease-and-low-hdl-cholesterol-level
#12
Timo Paavola, Sanna Kuusisto, Matti Jauhiainen, Sakari Kakko, Tiia Kangas-Kontio, Jari Metso, Pasi Soininen, Mika Ala-Korpela, Risto Bloigu, Minna L Hannuksela, Markku J Savolainen, Tuire Salonurmi
OBJECTIVE: The potential of high-density lipoproteins (HDL) to facilitate cholesterol removal from arterial foam cells is a key function of HDL. We studied whether cholesterol efflux to serum and HDL subfractions is impaired in subjects with early coronary heart disease (CHD) or metabolic syndrome (MetS) in families where a low HDL-cholesterol level (HDL-C) predisposes to early CHD. METHODS: HDL subfractions were isolated from plasma by sequential ultracentrifugation...
2017: PloS One
https://www.readbyqxmd.com/read/28205166/assaying-low-density-lipoprotein-ldl-uptake-into-cells
#13
Anke Loregger, Jessica K Nelson, Noam Zelcer
Determination of LDL particle uptake into cells is a valuable technique in the field of cholesterol metabolism. This allows assessment of LDL uptake capacity in different adherent and non-adherent cells types, as well as the effect of cellular, genetic, or pharmacological perturbations on this process. Here, we detail a general procedure that describes the production of fluorescently-labeled LDL particles and quantitative and non-quantitative assays for determining cellular LDL uptake.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28204818/reactive-oxygen-species-mediate-angiotensin-ii-induced-transcytosis-of-low-density-lipoprotein-across-endothelial-cells
#14
Fang Bian, Jun Cui, Tao Zheng, Si Jin
The retention of plasma low-density lipoprotein (LDL) particles to subendothelial spaces through transcytosis across the endothelium is the initial step of atherosclerosis (AS). Angiotensin II (Ang II), as the principal effector molecule of the renin-angiotensin system (RAS), is implicated in several important steps of AS development. However, whether or not Ang II can directly exert a pro‑atherogenic effect by promoting LDL transcytosis across endothelial barriers, has not been defined. In the present study, we found that Ang II upregulated intracellular reactive oxygen species (ROS) levels in endothelial cells (ECs) by measuring fluorescence of 2',7'-dichlorofluorescein (DCF‑DA)...
March 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28202546/identification-of-a-novel-series-of-anti-inflammatory-and-anti-oxidative-phospholipid-oxidation-products-containing-cyclopentenone-moiety-in-vitro-and-in-vivo-implication-in-atherosclerosis
#15
Jianhong Lu, Shuyuan Guo, Xinli Xue, Qun Chen, Jing Ge, Yujuan Zhuo, Huiqin Zhong, Buxing Chen, Mingming Zhao, Wei Han, Takashi Suzuki, Mingjiang Zhu, Lin Xia, Claus Schneider, Timothy S Blackwell, Ned A Porter, Lemin Zheng, Sotirios Tsimikas, Huiyong Yin
Oxidative stress and inflammation are two major contributing factors to atherosclerosis, a leading cause for cardiovascular diseases (CVDs). Oxidation of phospholipids on the surface of low density lipoprotein (LDL) particles generated under oxidative stress has been associated with the progression of atherosclerosis but the underlying molecular mechanisms remain poorly defined. We identified a novel series of oxidation products containing cyclopentenone moiety, termed deoxy-A2/J2-isoprostanes-phosphocholine (deoxy-A2/J2-IsoP-PC), from 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (PAPC) in vivo using mass spectrometry and by comparison to a chemically synthesized standard...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28199736/impact-of-hormonal-contraception-and-weight-loss-on-high-density-lipoprotein-cholesterol-efflux-and-lipoprotein-particles-in-women-with-polycystic-ovary-syndrome
#16
Anuja Dokras, Martin Playford, Penny M Kris-Etherton, Allen R Kunselman, Christy M Stetter, Nancy I Williams, Carol L Gnatuk, Stephanie J Estes, David B Sarwer, Kelly C Allison, Christos Coutifaris, Nehal Mehta, Richard S Legro
OBJECTIVE: To study the effects of oral contraceptive pills (OCP), the first-line treatment for PCOS, on high-density lipoprotein cholesterol (HDL-C) function (reverse cholesterol efflux capacity) and lipoprotein particles measured using nuclear magnetic resonance spectroscopy in obese women. DESIGN: Secondary analysis of a randomized controlled trial (OWL-PCOS) of OCP or Lifestyle (intensive Lifestyle modification) or Combined (OCP + Lifestyle) treatment groups for 16 weeks...
February 15, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28194698/pathophysiology-and-treatment-of-atherosclerosis-current-view-and-future-perspective-on-lipoprotein-modification-treatment
#17
REVIEW
S C Bergheanu, M C Bodde, J W Jukema
Recent years have brought a significant amount of new results in the field of atherosclerosis. A better understanding of the role of different lipoprotein particles in the formation of atherosclerotic plaques is now possible. Recent cardiovascular clinical trials have also shed more light upon the efficacy and safety of novel compounds targeting the main pathways of atherosclerosis and its cardiovascular complications.In this review, we first provide a background consisting of the current understanding of the pathophysiology and treatment of atherosclerotic disease, followed by our future perspectives on several novel classes of drugs that target atherosclerosis...
February 13, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28188431/lipoprotein-a-and-its-role-in-inflammation-atherosclerosis-and-malignancies
#18
Evelyn Orsó, Gerd Schmitz
Lipoprotein (a) (Lp(a)) is a modified low-density lipoprotein (LDL) particle with an additional specific apolipoprotein (a), covalently attached to apolipoprotein B‑100 of LDL by a single thioester bond. Increased plasma Lp(a) level is a genetically determined, independent, causal risk factor for cardiovascular disease.The precise quantification of Lp(a) in plasma is still hampered by mass-sensitive assays, large particle variation, poor standardization and lack of assay comparability.The physiological functions of Lp(a) include wound healing, promoting tissue repair and vascular remodeling...
February 10, 2017: Clinical Research in Cardiology Supplements
https://www.readbyqxmd.com/read/28187765/does-a-lack-of-physical-activity-explain-the-rheumatoid-arthritis-lipid-profile
#19
Hiba AbouAssi, Margery A Connelly, Lori A Bateman, K Noelle Tune, Janet L Huebner, Virginia B Kraus, Deborah A Winegar, James D Otvos, William E Kraus, Kim M Huffman
BACKGROUND: In rheumatoid arthritis (RA), cardiovascular risk is associated with paradoxical reductions in total cholesterol, low density lipoprotein-cholesterol (LDL-C), and high density lipoprotein-cholesterol (HDL-C). Concentrations of small LDL (LDL-P) and HDL (HDL-P) particles are also reduced with increased inflammation and disease activity in RA patients. Here we sought to identify which measure(s) of inflammation, disease activity and cardiometabolic risk contribute most to the RA-associated lipoprotein profile...
February 10, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28185214/prevention-of-cardiovascular-complications-in-patients-with-lp-a-hyperlipoproteinemia-and-progressive-cardiovascular-disease-by-long-term-lipoprotein-apheresis-according-to-german-national-guidelines
#20
Reinhard Klingel, Andreas Heibges, Cordula Fassbender
Lipoprotein(a) (Lp(a)) is an independent cardiovascular risk factor playing a causal role for atherosclerotic cardiovascular disease (CVD). Lipoprotein apheresis (LA) is a safe well-tolerated outpatient treatment to lower LDL-C and Lp(a) by 60-70%, and is the ultimate escalating therapeutic option in patients with hyperlipoproteinemias (HLP) involving LDL particles. Major therapeutic effect of LA is preventing cardiovascular events. Lp(a)-HLP associated with progressive CVD has been approved as indication for regular LA in Germany since 2008...
February 9, 2017: Clinical Research in Cardiology Supplements
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