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Lipid cholesterol metabolism atherosclerosis

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https://www.readbyqxmd.com/read/28203044/a-case-of-sitosterolemia-due-to-compound-heterozygous-mutations-in-abcg5-clinical-features-and-treatment-outcomes-obtained-with-colestimide-and-ezetimibe
#1
Sahoko Ono, Junko Matsuda, Aki Saito, Takenobu Yamamoto, Wataru Fujimoto, Hitomi Shimizu, Sumito Dateki, Kazunobu Ouchi
Sitosterolemia is a rare, autosomal recessively inherited disorder of lipid metabolism caused by mutations in the "ATP-binding cassette, subfamily G" member 5 and 8 proteins (encoded by the ABCG5 and ABCG8 genes, respectively), which play critical roles in the intestinal and biliary excretion of plant sterols. We report the clinical features and treatment outcomes of an 18-month-old Japanese girl with sitosterolemia, who presented with multiple linear and intertriginous xanthomas around the joint areas. Serum lipid analyses revealed elevated levels of total cholesterol (T-Chol: 866 mg/dL), low density lipoprotein-cholesterol (LDL-C: 679 mg/dL), and plant sterols (sitosterol: 24...
January 2017: Clinical Pediatric Endocrinology: Case Reports and Clinical Investigations: Official Journal of the Japanese Society for Pediatric Endocrinology
https://www.readbyqxmd.com/read/28194400/eating-the-dead-to-keep-atherosclerosis-at-bay
#2
REVIEW
Megan L Brophy, Yunzhou Dong, Hao Wu, H N Ashiqur Rahman, Kai Song, Hong Chen
Atherosclerosis is the primary cause of coronary heart disease (CHD), ischemic stroke, and peripheral arterial disease. Despite effective lipid-lowering therapies and prevention programs, atherosclerosis is still the leading cause of mortality in the United States. Moreover, the prevalence of CHD in developing countries worldwide is rapidly increasing at a rate expected to overtake those of cancer and diabetes. Prominent risk factors include the hardening of arteries and high levels of cholesterol, which lead to the initiation and progression of atherosclerosis...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28192240/effects-of-curcumin-on-hdl-functionality
#3
REVIEW
Shiva Ganjali, Christopher N Blesso, Maciej Banach, Matteo Pirro, Muhammed Majeed, Amirhossein Sahebkar
Curcumin, a bioactive polyphenol, is a yellow pigment of the Curcuma longa (turmeric) plant. Curcumin has many pharmacologic effects including antioxidant, anti-carcinogenic, anti-obesity, anti-angiogenic and anti-inflammatory properties. Recently, it has been found that curcumin affects lipid metabolism, and subsequently, may alleviate hyperlipidemia and atherosclerosis. Plasma HDL cholesterol (HDL-C) is an independent negative risk predictor of cardiovascular disease (CVD). However, numerous clinical and genetic studies have yielded disappointing results about the therapeutic benefit of raising plasma HDL-C levels...
February 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28153881/prevention-of-diet-induced-metabolic-dysregulation-inflammation-and-atherosclerosis-in-ldlr-mice-by-treatment-with-the-atp-citrate-lyase-inhibitor-bempedoic-acid
#4
Joshua P Samsoondar, Amy C Burke, Brian G Sutherland, Dawn E Telford, Cynthia G Sawyez, Jane Y Edwards, Stephen L Pinkosky, Roger S Newton, Murray W Huff
OBJECTIVE: Bempedoic acid (ETC-1002, 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid) is a novel low-density lipoprotein cholesterol-lowering compound. In animals, bempedoic acid targets the liver where it inhibits cholesterol and fatty acid synthesis through inhibition of ATP-citrate lyase and through activation of AMP-activated protein kinase. In this study, we tested the hypothesis that bempedoic acid would prevent diet-induced metabolic dysregulation, inflammation, and atherosclerosis...
February 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28144254/blood-pressure-dyslipidemia-and-inflammatory-factors-are-related-to-body-mass-index-in-scholar-adolescents
#5
Hanane Ghomari-Boukhatem, Assia Bouchouicha, Khedidja Mekki, Karima Chenni, Mohamed Belhadj, Malika Bouchenak
INTRODUCTION: Obesity is associated with increased occurrence of numerous diseases, including hypertension, dyslipidemia, insulin resistance, diabetes, and atherosclerosis. Blood pressure (BP), dyslipidemia, and inflammation markers and their relationships with body mass index (BMI) were determined in scholar adolescents. MATERIAL AND METHODS: Adolescents (n = 210) (sex ratio G/B = 106/104; 11 to 16 years) were recruited in three colleges of Oran city. Anthropometric parameters were measured to classify adolescents as thin (T), normal weight (NW), overweight (OW), or obese (O)...
February 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28130355/2intestinal-epithelial-cell-caveolin-1-regulates-fatty-acid-and-lipoprotein-cholesterol-plasma-levels
#6
Jessica P Otis, Meng-Chieh Shen, Vanessa Quinlivan, Jennifer L Anderson, Steven A Farber
Caveolae and their structural protein caveolin 1 (CAV1) have roles in cellular lipid processing and systemic lipid metabolism. Global deletion of CAV1 in mice results in insulin resistance and increases in atherogenic plasma lipids and cholesterol, but protects from diet-induced obesity and atherosclerosis. Despite the fundamental role of the intestinal epithelia in the regulation of dietary lipid processing and metabolism, the contributions of CAV1 to lipid metabolism in this tissue have never been directly investigated...
January 26, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28130274/commensal-bacteria-at-the-crossroad-between-cholesterol-homeostasis-and-chronic-inflammation-in-atherosclerosis
#7
Kazuyuki Kasahara, Takeshi Tanoue, Tomoya Yamashita, Keiko Yodoi, Takuya Matsumoto, Takuo Emoto, Taiji Mizoguchi, Tomohiro Hayashi, Naoki Kitano, Naoto Sasaki, Koji Atarashi, Kenya Honda, Ken-Ichi Hirata
The gut microbiota were shown to play critical roles in the development of atherosclerosis, but the detailed mechanism is limited. The purpose of this study is to clarify the influence of gut microbiota on atherogenesis via lipid metabolism and systemic inflammation. Germ-free (GF) or conventionally raised (Conv) Apolipoprotein E deficient (ApoE(-/-)) mice were fed chow diet and sacrificed at twenty weeks of age. We found lack of gut microbiota in ApoE(-/-) mice caused a significant increase in the plasma and hepatic cholesterol levels compared to ConvR ApoE(-/-) mice...
January 27, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28122883/retinol-binding-protein-dependent-cholesterol-uptake-regulates-macrophage-foam-cell-formation-and-promotes-atherosclerosis
#8
Yan Liu, Yuan Zhong, Hongen Chen, Duan Wang, Min Wang, Jing-Song Ou, Min Xia
BACKGROUND: -Retinol binding protein 4 (RBP4) is an adipokine that plays decisive roles in glucose metabolism and insulin sensitivity. Elevated circulating RBP4 levels were reported to be associated with increased risk for cardiovascular disease, but the precise role of RBP4 in atherosclerotic diseases and its mechanisms of action remain elusive. METHODS: -Serum RBP4 levels of 1683 participants from South China were evaluated and the occurrence of major adverse cardiovascular events was followed up for 5 years...
January 25, 2017: Circulation
https://www.readbyqxmd.com/read/28122481/preperitoneal-fat-thicknesses-lipid-profile-and-oxidative-status-in-women-with-uterine-fibroids
#9
Arianna Vignini, Jacopo Sabbatinelli, Nicolò Clemente, Giovanni Delli Carpini, Marta Tassetti, Giulia Zagaglia, Andrea Ciavattini
PURPOSE: There is growing evidence supporting a possible role for metabolic syndrome and its determinants, such as dyslipidemia, in uterine fibroid (UF) pathogenesis. The present study aims to investigate the association between UFs and visceral and subcutaneous fat thickness (SFT), lipid profile, and oxidative and antioxidative status. METHODS: In this cross-sectional study, 35 patients diagnosed with UFs and 15 women without UFs were enrolled. Clinical history and anthropometric parameters were collected for every woman...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28119096/hawthorn-crataegus-pinnatifida-bunge-leave-flavonoids-attenuate-atherosclerosis-development-in-apoe-knock-out-mice
#10
Pengzhi Dong, Lanlan Pan, Xiting Zhang, Wenwen Zhang, Xue Wang, Meixiu Jiang, Yuanli Chen, Yajun Duan, Honghua Wu, Yantong Xu, Peng Zhang, Yan Zhu
ETHNOPHARMACOLOGICAL RELEVANCE: Hawthorn (Crataegus pinnatifida Bunge) leave have been used to treat cardiovascular diseases in China and Europe. Hawthorn leave flavonoids (HLF) are the main part of extraction. Whether hawthorn leave flavonoids could attenuate the development of atherosclerosis and the possible mechanism remain unknown. MATERIALS AND METHODS: High-fat diet (HFD) mixed with HLF at concentrations of 5mg/kg and 20mg/kg were administered to apolipoprotein E (apoE) knock out mice...
January 21, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28097517/in-utero-exposure-of-hyperlipidemic-mice-to-diesel-exhaust-lack-of-effects-on-atherosclerosis-in-adult-offspring-fed-a-regular-chow-diet
#11
Jenna Harrigan, Divya Ravi, Jerry Ricks, Michael E Rosenfeld
Uterine stress is associated with an increased risk of later life metabolic diseases. In this study, we investigated the effect of diesel exhaust (DE) exposure in utero on adult susceptibility to atherosclerosis in genetically hyperlipidemic mice. Pregnant apolipoprotein E-deficient mice received either DE exposure (~250-300 μg/m(3) PM2.5 for 6 h/day, 5 days/week) or filtered air (FA) throughout gestation. Treatment effects on litter size and gender distribution were recorded. Plasma cholesterol and triglycerides were measured at 8, 12 and 16 weeks of age...
January 17, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28087808/identification-of-a-novel-liver-x-receptor-agonist-that-regulates-the-expression-of-key-cholesterol-homeostasis-genes-with-distinct-pharmacological-characteristics
#12
Ni Li, Xiao Wang, Yanni Xu, Yuan Lin, Ningyu Zhu, Peng Liu, Duo Lu, Shuyi Si
Activation of Liver X receptor (LXR) is associated with cholesterol metabolism and anti-inflammatory processes, which makes beneficial to anti-atherosclerosis. Nevertheless, existing agonists which target LXR, for example TO901317, are related to unwanted side-effects. In the present study, using a screening method we identified IMB-808, which displayed potent dual LXRα/β agonistic activity. In vitro, IMB-808 effectively increased the expressing quantity of genes related to reverse cholesterol transport process as well as those associated with cholesterol metabolism pathway in multiple cell lines...
January 13, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28070236/interaction-of-hyperlipidemia-and-reactive-oxygen-species-insights-from-the-lipid-raft-platform
#13
EDITORIAL
Eisuke Amiya
Reactive oxygen species (ROS) and oxidative stress are closely associated with the development of atherosclerosis, and the most important regulator of ROS production in endothelial cells is NADPH oxidase. Activation of NADPH oxidase requires the assembly of multiple subunits into lipid rafts, which include specific lipid components, including free cholesterol and specific proteins. Disorders of lipid metabolism such as hyperlipidemia affect the cellular lipid components included in rafts, resulting in modification of cellular reactions that produce ROS...
December 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/28062505/cross-sectional-positive-association-of-serum-lipids-and-blood-pressure-with-serum-sodium-within-the-normal-reference-range-of-135-145-mmol-l
#14
Shouguo Gao, Xiangqin Cui, Xujing Wang, Maurice B Burg, Natalia I Dmitrieva
OBJECTIVE: Serum sodium concentration is maintained by osmoregulation within normal range of 135 to 145 mmol/L. Previous analysis of data from the ARIC study (Atherosclerosis Risk in Communities) showed association of serum sodium with the 10-year risk scores of coronary heart disease and stroke. Current study evaluated the association of within-normal-range serum sodium with cardiovascular risk factors. APPROACH AND RESULTS: Only participants who did not take cholesterol or blood pressure medications and had sodium within normal 135 to 145 mmol/L range were included (n=8615), and the cohort was stratified based on race, sex, and smoking status...
December 29, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28039934/prostaglandin-e2-promotes-hepatic-bile-acid-synthesis-by-an-e-prostanoid-receptor-3-mediated-hepatocyte-nuclear-receptor-4%C3%AE-cholesterol-7%C3%AE-hydroxylase-pathway-in-mice
#15
Shuai Yan, Juan Tang, Yuyao Zhang, Yuanyang Wang, Shengkai Zuo, Yujun Shen, Qianqian Zhang, Di Chen, Yu Yu, Kai Wang, Sheng-Zhong Duan, Ying Yu
: Prostaglandin E2 (PGE2 ) is an important lipid mediator of inflammation. However, whether and how PGE2 regulates hepatic cholesterol metabolism remains unknown. We found that expression of the PGE2 receptor, E prostanoid receptor 3 (EP3) expression is remarkably increased in hepatocytes in response to hyperlipidemic stress. Hepatocyte-specific deletion of EP3 receptor (EP3(hep-/-) ) results in hypercholesterolemia and augments diet-induced atherosclerosis in low-density lipoprotein receptor knockout (Ldlr(-/-) ) mice...
November 5, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28030540/severe-atherosclerosis-and-hypercholesterolemia-in-mice-lacking-both-the-melanocortin-type-4-receptor-and-low-density-lipoprotein-receptor
#16
Vera Lede, Christin Franke, Andrej Meusel, Daniel Teupser, Albert Ricken, Joachim Thiery, Jürgen Schiller, Daniel Huster, Torsten Schöneberg, Angela Schulz
Dysfunction of the melanocortin system can result in severe obesity accompanied with dyslipidemia and symptoms of the metabolic syndrome but the effect on vascular atherogenesis is not known. To study the impact of obesity and dyslipidemia on the cardiovascular system, we generated mice double-deficient for the melanocortin type 4 receptor (Mc4rmut mice) and the LDL receptor (Ldlr-/- mice). Mc4rmut mice develop obesity due to hyperphagia. Double-mutant mice (Mc4rmut;Ldlr-/-) exhibited massive increases in body weight, plasma cholesterol and triacylglycerol levels and developed atherosclerosis...
2016: PloS One
https://www.readbyqxmd.com/read/28013147/hexim1-heterozygosity-stabilizes-atherosclerotic-plaque-and-decreased-steatosis-in-apoe-null-mice-fed-atherogenic-diet
#17
Manya Dhar-Mascareno, Inna Rozenberg, Jahangir Iqbal, M Mahmood Hussain, Daniel Beckles, Eduardo Mascareno
Hexim-1 is an inhibitor of RNA polymerase II transcription elongation. Decreased Hexim-1 expression in animal models of chronic diseases such as left ventricular hypertrophy, obesity and cancer triggered significant changes in adaptation and remodeling. The main aim of this study was to evaluate the role of Hexim1 in lipid metabolism focused in the progression of atherosclerosis and steatosis. We used the C57BL6 apolipoprotein E (ApoE null) crossed bred to C57BL6Hexim1 heterozygous mice to obtain ApoE null - Hexim1 heterozygous mice (ApoE-HT)...
December 21, 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28012603/overexpressed-pltp-in-macrophage-may-promote-cholesterol-accumulation-by-prolonged-endoplasmic-reticulum-stress
#18
Xinquan Yang, Yang Yu, Daxin Wang, Shucun Qin
It is well known that phospholipid transfer protein (PLTP) is involved in the lipid metabolism and development of atherosclerosis (AS). Abundant PLTP is considered to be expressed on the foam cells derived from monocyte/macrophages in atherosclerotic plaques, suggesting that high level of active PLTP may promote the formation of foam cells. However, the exact role of PLTP on the process of macrophage derived foam cell formation remains unclear. The accumulation of free cholesterol (FC) in the cytoplasm may lead to the prolonged endoplasmic reticulum stress (ERs) and the imbalance of intracellular cholesterol homeostasis...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28012169/curcumin-as-a-potential-candidate-for-treating-hyperlipidemia-a-review-of-cellular-and-metabolic-mechanisms
#19
REVIEW
Yunes Panahi, Yasin Ahmadi, Manouchehr Teymouri, Thomas P Johnston, Amirhossein Sahebkar
Curcumin is an herbal polyphenol extensively investigated for antioxidant, anti-inflammatory and hypolipidaemic properties. In the present review, the efficacy of curcumin for improving a plasma lipid profile has been evaluated and compared with statins, a well-known class of medicines for treating hypercholesterolemia and hyperlipidaemia. Curcumin is presumably most effective in reducing triglyceride (TG), while statins are most efficient in lowering low-density lipoproteins-cholesterol (LDL-C). Additionally, various molecular and metabolic mediators of cholesterol and plasma lipid homeostasis are discussed in relation to how they are modulated by curcumin or statins...
December 24, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28011212/ppar%C3%AE-in-macrophages-and-atherosclerosis
#20
REVIEW
G Chinetti-Gbaguidi, B Staels
Macrophages are central cells in the genesis and development of atherosclerosis, one of the major causes of cardiovascular diseases. Macrophages take up lipids (mainly cholesterol and triglycerides) from lipoproteins thus transforming into foam cells. Moreover, through the efflux pathway, macrophages are the main actors of the elimination of excessive tissue cholesterol toward extra-cellular acceptors. Macrophages participate in the control of inflammation by displaying different functional phenotypes, from the M1 pro-inflammatory to the M2 anti-inflammatory state...
December 21, 2016: Biochimie
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