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Triglyceride-Rich Lipoproteins

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https://www.readbyqxmd.com/read/29342252/triglyceride-rich-lipoprotein-cholesterol-trl-c-the-ugly-stepsister-of-ldl-c
#1
Michael H Davidson
No abstract text is available yet for this article.
January 12, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29337071/lower-protein-and-higher-carbohydrate-intake-is-related-with-altering-metabolic-syndrome-components-in-elderly-women-a-cross-sectional-study
#2
Hellen C G Nabuco, Crisieli M Tomeleri, Paulo Junior Sugihara, Rodrigo Dos Reis Fernandes, Edilaine F Cavalcante, Melissa Antunes, Roberto Carlos Burini, Danielle Venturini, Décio S Barbosa, Analiza Mônica Silva, Edilson S Cyrino
BACKGROUND: Metabolic Syndrome (MetS) is an energy-disturbance disease associated with insulin resistance. Hence, the intake of energy-rich macronutrients might affect some MetS components. The aim of this study was to explore the association of ingested macronutrients with MetS components in older women. METHODS: A cross sectional study was conducted in 245 older women (≥60 years). Whole-body dual-energy X-ray absorptiometry was used to assess total body fat, percentage body fat (absolute and relative), and skeletal muscle mass...
January 11, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29336623/the-effect-of-phytosterol-rich-fraction-from-palm-fatty-acid-distillate-on-blood-serum-lipid-profile-of-dyslipidemia-rats
#3
Kgs Ahmadi, Huda Oktafa, Teti Estiasih
Phytosterol-rich fraction (PRF) obtained from palm fatty acid distillate (PFAD) was investigated for its effect on blood serum lipid profile of dyslipidemia rats. Dyslipidemia was induced by force feeding cholesterol to five groups of rats; one group was a control or normal group. Cholesterol force-fed groups were treated with 0, 10, 20, 30, and 40 mg PRF/kg/day for 4 weeks. All groups of rats were fed standard diet. A normal group was fed standard diet without PRF treatment and cholesterol force feeding...
January 16, 2018: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/29329748/oral-bifidobacterium-longum-expressing-glp-2-improves-nutrient-assimilation-and-nutritional-homeostasis-in-mice
#4
Qian Zhang, Mengge Liu, Shiyu Li, Zhenrui Xu, Jiajia Wang, Yuzhe Wang, Zhengbin Fei, Wenhua Huang, Hanxiao Sun
Bifidobacterium has been developed for the oral delivery of peptides and has the added beneficial effect on our bodies through its probiotic properties. Here, we utilize Bifidobacterium as a delivery system to orally deliver Glucagon like peptide-2 (GLP-2). We constructed vector derived from pET-31b(+) to construct a Bifidobacterium longum expressing GLP-2. We then determined the bioactivity of recombinant Bifidobacterium in Caco-2 cells. Finally, we quantified newly synthesized ApoB48 and chylomicron production in mice infused with exogenous GLP-2 or Bifidobacterium expressing GLP-2...
January 9, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29316942/comparison-of-membrane-affinity-based-method-with-size-exclusion-chromatography-for-isolation-of-exosome-like-vesicles-from-human-plasma
#5
Ruzena Stranska, Laurens Gysbrechts, Jens Wouters, Pieter Vermeersch, Katarzyna Bloch, Daan Dierickx, Graciela Andrei, Robert Snoeck
BACKGROUND: Plasma extracellular vesicles (EVs), especially exosome-like vesicles (ELVs), are being increasingly explored as a source of potential noninvasive disease biomarkers. The discovery of blood-based biomarkers associated with ELVs requires methods that isolate high yields of these EVs without significant contamination with highly abundant plasma proteins and lipoproteins. The rising interest in blood-based EV-associated biomarkers has led to the rapid development of novel EV isolation methods...
January 9, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29303250/we-fret-so-you-don-t-have-to-new-models-of-the-lipoprotein-lipase-dimer
#6
Cassandra K Hayne, Hayretin Yumerefendi, Lin Cao, Jacob W Gauer, Michael J Lafferty, Brian Kuhlman, Dorothy A Erie, Saskia B Neher
Lipoprotein lipase (LPL) is a dimeric enzyme that is responsible for clearing triglyceride-rich lipoproteins from the blood. Although LPL plays a key role in cardiovascular health, an experimentally derived three-dimensional structure has not been determined. Such a structure would aid in understanding mutations in LPL that cause familial LPL deficiency in patients and help in the development of therapeutic strategies to target LPL. A major obstacle to structural studies of LPL is that LPL is an unstable protein that is difficult to produce in the quantities needed for nuclear magnetic resonance or crystallography...
January 5, 2018: Biochemistry
https://www.readbyqxmd.com/read/29246728/an-enzyme-linked-immunosorbent-assay-for-measuring-gpihbp1-levels-in-human-plasma-or%C3%A2-serum
#7
Kazuya Miyashita, Isamu Fukamachi, Manabu Nagao, Tatsuro Ishida, Junji Kobayashi, Tetsuo Machida, Kiyomi Nakajima, Masami Murakami, Michael Ploug, Anne P Beigneux, Stephen G Young, Katsuyuki Nakajima
BACKGROUND: Glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1), a glycosylphosphatidylinositol (GPI)-anchored protein of capillary endothelial cells, transports lipoprotein lipase to the capillary lumen and is essential for the lipolytic processing of triglyceride-rich lipoproteins. OBJECTIVE: Because some GPI-anchored proteins have been detected in plasma, we tested whether GPIHBP1 is present in human blood and whether GPIHBP1 deficiency or a history of cardiovascular disease affected GPIHBP1 circulating levels...
November 1, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29244870/human-hepatic-lipase-overexpression-in-mice-induces-hepatic-steatosis-and-obesity-through-promoting-hepatic-lipogenesis-and-white-adipose-tissue-lipolysis-and-fatty-acid-uptake
#8
Lídia Cedó, David Santos, Núria Roglans, Josep Julve, Victor Pallarès, Andrea Rivas-Urbina, Vicenta Llorente-Cortes, Joan Carles Laguna, Francisco Blanco-Vaca, Joan Carles Escolà-Gil
Human hepatic lipase (hHL) is mainly localized on the hepatocyte cell surface where it hydrolyzes lipids from remnant lipoproteins and high density lipoproteins and promotes their hepatic selective uptake. Furthermore, hepatic lipase (HL) is closely associated with obesity in multiple studies. Therefore, HL may play a key role on lipid homeostasis in liver and white adipose tissue (WAT). In the present study, we aimed to evaluate the effects of hHL expression on hepatic and white adipose triglyceride metabolism in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/29236863/evaluation-of-phenolic-compounds-and-lipid-lowering-effect-of-morus-nigra-leaves-extract
#9
Ana Lúcia B Zeni, Tatianne D Moreira, Ana Paula Dalmagro, Anderson Camargo, Larissa A Bini, Edésio L Simionatto, Dilamara R Scharf
Morus nigra L. (Moraceae) is a tree known as black mulberry and the leaves are used in folk medicine in the treatment of diabetes, high cholesterol and menopause symptoms. The aim of this study was to evaluate the M. nigra leaves phytochemical profile in different extractions and the hypolipidemic effect of the infusion comparing to the fenofibrate. Morus nigra infusion (MN) showed higher amounts of phenolics and flavonoids (83.85 mg/g and 79.96 µg/g, respectively), as well as antioxidant activity (83.85%) than decoction or hydromethanolic extracts...
December 7, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29220052/hypoglycemic-and-hypolipidemic-effects-of-anthocyanins-extract-from-black-soybean-seed-coat-in-high-fat-diet-and-streptozotocin-induced-diabetic-mice
#10
Zhongqin Chen, Cong Wang, Yuxiang Pan, Xudong Gao, Haixia Chen
Black soybean seed coat extract (BSSCE) is a rich source of anthocyanins with multiple health effects. This study was aimed at investigating the composition and hypoglycemic and hypolipidemic effects of BSSCE in vitro and in a high-fat diet and streptozotocin (STZ)-induced diabetic mice. The anthocyanins of BSSCE were identified as cyanidin-3-O-glucoside, delphinidin-3-O-glucoside, and peonidin-3-O-glucoside by HPLC-MS. Results demonstrated that BSSCE exhibited strong inhibitory activities for α-amylase, potent inhibition activity against lipid accumulation in HepG2 cells and protection effect on H2O2-induced oxidative stress-damaged HepG2 cells...
December 8, 2017: Food & Function
https://www.readbyqxmd.com/read/29216237/the-nutraceutical-benefits-of-subfractions-of-abelmoschus-esculentus-in-treating-type-2-diabetes-mellitus
#11
Chien-Ning Huang, Chau-Jong Wang, Chih-Li Lin, Hui-Ting Lin, Chiung-Huei Peng
Abelmoschus esculentus (AE), a commonly consumed vegetable, is well-known for its anti-hyperglycemic effects. However, few scientific reports have identified its targets because mucilage increases the difficulty of manipulation. We recently reported extraction steps to obtain subfractions of AE, which were found to attenuate the adverse effects of high glucose and fatty acid in vitro. In this study, we used modified extraction steps and type 2 diabetic rats to explore whether AE subfractions can improve the metabolic disturbances caused by insulin resistance in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/29200740/evaluation-of-hypolipidemic-and-antioxidant-effects-in-phenolrich-fraction-of-crataegus-pinnatifida-fruit-in-hyperlipidemia-rats-and-identification-of-chemical-composition-by-ultra-performance-liquid-chromatography-coupled-with-quadropole-time-of-flight-mass
#12
Feng Shao, Lifei Gu, Huijuan Chen, Ronghua Liu, Huilian Huang, Lanying Chen, Ming Yang
Background: Hawthorn (Crataegus pinnatifida) fruit has enjoyed a great popularity as a pleasant-tasting food associated with hypolipidemic and antioxidant effects. Objective: Our aim was to screen the effective fraction of hawthorn fruit in the treatment of hyperlipidemia rats. Materials and Methods: In this study, ethanol extract of hawthorn fruit (Fr.1) and four fractionated extracts (Fr.2, Fr.3, Fr.4, and Fr.5) were compared to total phenol content evaluated using Folin-Ciocalteu method, and hypolipidemic and antioxidant effects were assessed in hyperlipidemic rats...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29189132/polyphenols-novel-signaling-pathways
#13
Marie-Louise Ricketts, Bradley S Ferguson
BACKGROUND: Cardiovascular disease (CVD) is currently the leading cause of death globally. The metabolic syndrome (MetS), a clustering of risk factors including hypertension, hyperglycemia, elevated low-density lipoprotein (LDL) cholesterol, reduced high-density lipoprotein (HDL) cholesterol and increased visceral adiposity, is a significant risk factor for the development of CVD. Non-alcoholic fatty liver disease (NAFLD), often referred to as the hepatic manifestation of MetS, is a constellation of progressive liver disorders closely linked to obesity, diabetes, and insulin resistance...
November 29, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29188234/radiolabeled-cholesteryl-ethers-a-need-to-analyze-for-biological-stability-before-use
#14
Denny Joseph Manual Kollareth, Chuchun L Chang, Inge H Hansen, Richard J Deckelbaum
Radiolabeled cholesteryl ethers are widely used as non-metabolizable tracers for lipoproteins and lipid emulsions in a variety of in vitro and in vivo experiments. Since cholesteryl ethers do not leave cells after uptake and are not hydrolyzed by mammalian cellular enzymes, these compounds can act as markers for cumulative cell uptakes of labeled particles. We have employed [3H]cholesteryl oleoyl ether to study the uptake and distribution of triglyceride-rich emulsion particles on animal models. However, questionable unexpected results compelled us to analyze the stability of these ethers...
March 2018: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/29184625/confounding-factors-in-vesicle-uptake-studies-using-fluorescent-lipophilic-membrane-dyes
#15
Kaloyan Takov, Derek M Yellon, Sean M Davidson
Small extracellular vesicles (sEVs) such as exosomes are nanocarriers of proteins, RNAs and DNAs. Isolation of pure sEV populations remains challenging, with reports of protein and lipoprotein contaminants in the isolates. Cellular uptake - a cornerstone for understanding exosome and sEV function - is frequently examined using lipophilic dyes such as PKH67 or CellMask to label the vesicles. In this study, we investigated whether contaminants can confound the outcomes from sEV and exosomes uptake experiments...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/29179568/atherogenic-lipoprotein-subfractions-and-carotid-atherosclerosis-in-menopausal-women
#16
Arcangelo Iannuzzi, Marco Gentile, Gabriella Iannuzzo, Giuseppe Covetti, Camilla Panico, Amalia Mattiello, Ersilia La Fata, Lanfranco D'Elia, Mario De Michele, Paolo Rubba
The aim of the study was to evaluate the relationship between cholesterol contained in very-low-density lipoproteins (VLDL-C), intermediate-density lipoproteins (IDL-C), low-density lipoproteins, high-density lipoproteins, and carotid intima-media thickness (cIMT) and carotid plaques in 228 postmenopausal women (63.1 ± 8.2 years) who participated in the ATENA Project and underwent clinical, biochemical (including the assay of lipoproteins using the Lipoprint system), and carotid ultrasound tests. Very-low-density lipoprotein cholesterol had a statistically significant linear association with cIMT ( P < ...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/29162604/suppression-of-hepatic-flot1-flotillin-1-by-type-2-diabetes-mellitus-impairs-the-disposal-of-remnant-lipoproteins-via-syndecan-1
#17
Keyang Chen, Qingsi Wu, Kongwang Hu, Chengwei Yang, Xiangdong Wu, Peter Cheung, Kevin Jon Williams
OBJECTIVE: Type 2 diabetes mellitus (T2DM) and the atherometabolic syndrome exhibit a deadly dyslipoproteinemia that arises in part from impaired hepatic disposal of C-TRLs (cholesterol- and triglyceride-rich remnant apoB [apolipoprotein B] lipoproteins). We previously identified syndecan-1 as a receptor for C-TRLs that directly mediates endocytosis via rafts, independent from coated pits. Caveolins and flotillins form rafts but facilitate distinct endocytotic pathways. We now investigated their participation in syndecan-1-mediated disposal of C-TRLs and their expression in T2DM liver...
November 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29158401/kinesin-dependent-mechanism-for-controlling-triglyceride-secretion-from-the-liver
#18
Priyanka Rai, Mukesh Kumar, Geetika Sharma, Pradeep Barak, Saumitra Das, Siddhesh S Kamat, Roop Mallik
Despite massive fluctuations in its internal triglyceride content, the liver secretes triglyceride under tight homeostatic control. This buffering function is most visible after fasting, when liver triglyceride increases manyfold but circulating serum triglyceride barely fluctuates. How the liver controls triglyceride secretion is unknown, but is fundamentally important for lipid and energy homeostasis in animals. Here we find an unexpected cellular and molecular mechanism behind such control. We show that kinesin motors are recruited to triglyceride-rich lipid droplets (LDs) in the liver by the GTPase ARF1, which is a key activator of lipolysis...
November 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29151984/hepatic-and-aortic-arch-expression-and-serum-levels-of-syndecan-1-in-apoe-mice
#19
Elena I Leonova, Elena S Sadovnikova, Elvira R Shaykhutdinova, Oxana V Galzitskaya, Arkady N Murashev, Alexandr S Solonin
Background: Heparan sulfate proteoglycan (HSPG) syndecan-1 (Sdc1) acts as a receptor for triglyceride-rich lipoproteins (TRLs), growth factors, chemokines and enzymes. Due to the disordered structure, its function is as diverse as its ligands. In this paper, we have analyzed hepatic and aortic arch expression of Sdc1 in ApoE(-/-) mice and examined their association with biochemical changes in plasma during the atheroma formation. Methods: ApoE knockout (ApoE(-/-)) mice as a model of atherosclerosis were used...
2017: Open Biochemistry Journal
https://www.readbyqxmd.com/read/29143803/use-of-novel-high-protein-functional-food-products-as-part-of-a-calorie-restricted-diet-to-reduce-insulin-resistance-and-increase-lean-body-mass-in-adults-a-randomized-controlled-trial
#20
Carol S Johnston, Barry Sears, Mary Perry, Jessica R Knurick
Significant reductions in insulin resistance (IR) can be achieved by either calorie restriction or by the increase of lean mass. However, calorie restriction usually results in significant loss of lean mass. A 6-week randomized controlled feeding trial was conducted to determine if a calorie-restricted, high-protein diet (~125 g protein/day consumed evenly throughout the day) using novel functional foods would be more successful for reducing IR in comparison to a conventional diet (~80 g protein/day) with a similar level of calorie restriction...
October 28, 2017: Nutrients
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