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Lipoprotein (a)

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https://www.readbyqxmd.com/read/29161690/catechins-blunt-the-effects-of-oxldl-and-its-primary-metabolite-phosphatidylcholine-hydroperoxide-on-endothelial-dysfunction-through-inhibition-of-oxidative-stress-and-restoration-of-enos-in-rats
#1
Hao-Hsiang Chang, Chen-Yen Chien, Kuo-Hsin Chen, Shih-Chung Huang, Chiang-Ting Chien
BACKGROUND/AIMS: We explored the effects of catechins (decaffeinated green tea extracts containing (-)-epicatechin, (-)-epigallocatechin, (-)-epicatechin gallate and (-)-epigallocatechin gallate) on atherosclerosis risk factors, oxidized low-density lipoprotein (oxLDL) and its primary metabolite, phosphatidylcholine hydroperoxide (PCOOH) induced oxidative injury in cultured endothelial cell line and rats. METHODS: We used endothelial cell line and male Wistar rats to determine the effect of catechins on oxLDL or PCOOH induced oxidative injury including apoptosis, H2O2 level, vascular responses and urinary 8-isoprostane and nitrite/nitrate concentration...
November 22, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29161303/nonlinear-dynamics-of-early-atherosclerotic-plaque-formation-may-determine-the-efficacy-of-high-density-lipoproteins-hdl-in-plaque-regression
#2
Alexander D Chalmers, Christina A Bursill, Mary R Myerscough
We use a computational model to explore the effect of foam cell accumulation on plaque regression following an increase in high density lipoprotein (HDL) influx into the plaque. Atherosclerotic plaque formation is the outcome of cellular and cytokine responses to low density lipoproteins (LDL) that penetrate the artery wall following an injury to the endothelium and become modified. We modelled the cells and cytokines that are most important in plaque formation using partial differential equations. The model includes monocytes and macrophages, foam cells, macrophage chemoattractants, endothelium-stimulating cytokines, modified low density lipoproteins (mod LDL) and HDL...
2017: PloS One
https://www.readbyqxmd.com/read/29161233/swimming-but-not-vitamin-e-ameliorates-prothrombotic-state-and-hypofibrinolysis-in-a-rat-model-of-nonalcoholic-fatty-liver-disease
#3
Hussein F Sakr, Amr M Abbas, Mohamed A Haidara
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is associated with a systemic procoagulant hypofibrinolysis state that is considered as a risk factor for microangiopathy and peripheral vascular diseases. Swimming exercise ameliorates the metabolic dysfunction in type 2 diabetes. Vitamin E is a natural antioxidant that reduces the risk of endothelial dysfunction in metabolic syndrome. The aim of the present study is to investigate the effect of combined swimming exercise with vitamin E on coagulation as well as blood fibrinolysis markers in rats with NAFLD...
November 21, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29161079/a-new-frontier-in-immunometabolism-cholesterol-in-lung-health-and-disease
#4
Michael B Fessler
The lung has a unique relationship to cholesterol that is shaped by its singular physiology. On the one hand, the lungs receive the full cardiac output and have a predominant dependence on plasma lipoprotein uptake for their cholesterol supply. On the other hand, surfactant lipids, including cholesterol, are continually susceptible to oxidation owing to direct environmental exposure and must be cleared or recycled because of the very narrow biophysical mandates placed upon surfactant lipid composition. Interestingly, increased lipid-laden macrophage "foam cells" have been noted in a wide range of human lung pathologies...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161075/metabolic-dysregulation-systemic-inflammation-and-pediatric-obesity-related-asthma
#5
Deepa Rastogi, Fernando Holguin
Obesity-related asthma is a distinct pediatric asthma phenotype. It is associated with higher disease burden, lower pulmonary function, and suboptimal response to current asthma medications. Recent studies have made inroads into elucidating its pathophysiology. Systemic immune responses in obese children with asthma are skewed to a nonatopic T-helper cell type 1 (Th1) pattern that correlates with pulmonary function deficits. The prevalence of metabolic dysregulation is also higher among obese children with asthma than among normal-weight children with asthma...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29160303/the-pnpla3-i148m-variant-is-associated-with-transaminase-elevations-in-type-2-diabetes-patients-treated-with-basal-insulin-peglispro
#6
S Pillai, S Duvvuru, P Bhatnagar, W Foster, M Farmen, S Shankar, C Harris, E Bastyr, B Hoogwerf, A Haupt
Basal insulin peglispro (BIL) is a novel insulin with hepato-preferential action. In phase 3 trials, BIL showed significantly improved glycemic control but higher levels of transaminases (alanine aminotransferase (ALT) and aspartate aminotransferase (AST)), triglycerides (TGs) and liver fat content (LFC) compared with insulin glargine (GL). As variants in PNPLA3 (I148M) and TM6SF2 (E167K) are associated with nonalcoholic fatty liver disease, we assessed these variants in type 2 diabetes (T2D) patients randomized to receive BIL (n=1822) or GL (n=1270) in three phase 3 trials...
November 21, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/29160108/effects-of-hepato-preferential-basal-insulin-peglispro-on-nuclear-magnetic-resonance-biomarkers-lipoprotein-insulin-resistance-index-and-glyca-in-patients-with-diabetes
#7
Margery A Connelly, James D Otvos, Qianyi Zhang, Shuyu Zhang, Caryl J Antalis, Annette M Chang, Byron J Hoogwerf
AIM: To characterize the effects of hepato-preferential basal insulin peglispro (BIL) and insulin glargine on insulin resistance (lipoprotein insulin resistance index [LP-IR]) and inflammation (GlycA), and to explore the biological implications. METHODS: This substudy included 847 patients with Type 1 diabetes (T1D) or Type 2 diabetes (T2D) in four cohorts of the BIL development program. LP-IR and GlycA were measured before and after insulin treatment. Correlations between LP-IR, GlycA, clinical parameters and liver biomarkers were assessed...
November 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29160079/a-comprehensive-mass-spectrometric-survey-of-streptococcus-pyogenes-subcellular-proteomes
#8
Laura Wilk, Lotta Happonen, Johan Malmström, Heiko Herwald
Streptococcus pyogenes is a major global health burden causing a wide variety of diseases. As a vaccine against this bacterium is still lacking, vaccine candidates or antimicrobial therapies are urgently needed. Here, we use an invasive and clinical relevant streptococcal M1 serotype in order to characterise the bacterial proteome in-depth. An elaborate fractionation technique is employed to separate the different cell fractions followed by shotgun mass spectrometry analysis, allowing us to confirm the expression of nearly two thirds (1022) of the 1690 open reading frames predicted for the streptococcal M1 reference proteome...
November 21, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29159965/improvement-in-lipids-after-switch-to-boosted-atazanavir-or-darunavir-in-children-adolescents-with-perinatally-acquired-hiv-on-older-protease-inhibitors-results-from-the-pediatric-hiv-aids-cohort-study
#9
J Jao, W Yu, K Patel, T L Miller, B Karalius, M E Geffner, L A DiMeglio, A Mirza, J S Chen, M Silio, E J McFarland, R B Van Dyke, D Jacobson
OBJECTIVES: Dyslipidaemia is common in perinatally HIV-infected (PHIV) youth receiving protease inhibitors (PIs). Few studies have evaluated longitudinal lipid changes in PHIV youth after switch to newer PIs. METHODS: We compared longitudinal changes in fasting lipids [total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and TC:HDL-C ratio] in PHIV youth enrolled in the Pediatric HIV/AIDS Cohort Study (PHACS) Adolescent Master Protocol (AMP) study who switched to atazanavir/ritonavir (ATV/r)- or darunavir/ritonavir (DRV/r)-based antiretroviral therapy (ART) from an older PI-based ART and those remaining on an older PI...
November 21, 2017: HIV Medicine
https://www.readbyqxmd.com/read/29159568/a-cross-sectional-and-longitudinal-study-between-association-of-n-3-polyunsaturated-fatty-acids-derived-from-fish-consumption-and-high-density-lipoprotein-heterogeneity
#10
Shigemasa Tani, Rei Matsuo, Kenji Kawauchi, Tsukasa Yagi, Wataru Atsumi, Atsushi Hirayama
Decreased high-density lipoprotein (HDL) particle size, cholesterol poor, apolipoprotein A-I-rich HDL particles leading to smaller HDL particle size, may be associated with an anti-atherosclerotic effect. The data are sparse regarding the relationship between n-3 polyunsaturated fatty acids [n-3 PUFAs: eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA)] and HDL particle size. This study was designed as a hospital-based cross-sectional study to investigate the relationship between the serum levels of n-3 PUFAs and the HDL-cholesterol/apolipoprotein A-1 ratio, as estimated by the HDL particle size, in patients with the presence of one or more risk factors for atherosclerotic cardiovascular disease (ASCVD)...
November 20, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29159554/detailed-description-of-change-in-serum-cholesterol-profile-with-incremental-weight-loss-after-restrictive-bariatric-surgery
#11
Geraldine J Ooi, Arul Earnest, Lisa Doyle, Cheryl Laurie, John M Wentworth, Ken Sikaris, Carel W le Roux, Paul R Burton, Paul E O'Brien, Wendy A Brown
INTRODUCTION: Dyslipidemia affects up to 75% of morbidly obese individuals and is a key driver of cardiovascular disease. Weight loss is an established strategy to improve metabolic risk, including dyslipidemia. We aimed to determine weight loss goals for resolution of serum lipid abnormalities, by measuring improvements during progressive weight loss in obese individuals. METHODS: We performed a prospective cohort study of obese individuals with the metabolic syndrome undergoing adjustable gastric banding...
November 21, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29159532/a-multiphysics-approach-for-modeling-early-atherosclerosis
#12
M P Thon, A Hemmler, A Glinzer, M Mayr, M Wildgruber, A Zernecke-Madsen, M W Gee
This work is devoted to the development of a mathematical model of the early stages of atherosclerosis incorporating processes of all time scales of the disease and to show their interactions. The cardiovascular mechanics is modeled by a fluid-structure interaction approach coupling a non-Newtonian fluid to a hyperelastic solid undergoing anisotropic growth and a change of its constitutive equation. Additionally, the transport of low-density lipoproteins and its penetration through the endothelium is considered by a coupled set of advection-diffusion-reaction equations...
November 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29159396/association-of-nonalcoholic-fatty-liver-disease-with-lower-brain-volume-in-healthy-middle-aged-adults-in-the-framingham-study
#13
Galit Weinstein, Shira Zelber-Sagi, Sarah R Preis, Alexa S Beiser, Charles DeCarli, Elizabeth K Speliotes, Claudia L Satizabal, Ramachandran S Vasan, Sudha Seshadri
Importance: Nonalcoholic fatty liver disease (NAFLD) is a common condition that is most often asymptomatic. It is associated with metabolic syndrome, incident diabetes, carotid atherosclerosis, and endothelial dysfunction, conditions that in turn are strongly linked with brain damage and cognitive impairment. However, it is not known whether NAFLD is associated with structural brain measures in humans. Objective: To assess the association between prevalent NAFLD and brain magnetic resonance imaging (MRI) measures...
November 20, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29158840/inorganic-kernel-reconstituted-lipoprotein-biomimetic-nanovehicles-enable-efficient-targeting-trojan-horse-delivery-of-stat3-decoy-oligonucleotide-for-overcoming-trail-resistance
#14
Kai Shi, Jianxiu Xue, Yan Fang, Hongshu Bi, Shan Gao, Dongjuan Yang, Anqi Lu, Yuai Li, Yao Chen, Liyuan Ke
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) can selectively induce apoptosis in a variety of tumor cells, but not most normal cells. Nevertheless, its therapeutic potential is limited due to the frequent occurrence of resistance in tumor cells, especially hepatocellular carcinoma cell lines. Therefore, we investigated the reversal effect of STAT3-decoy oligonucleotides (ODNs) on TRAIL resistance. Methods. Considering that the drawback of poor cellular permeability and rapid degradation in vivo limited ODNs' further clinical applications, we developed a biomimetic calcium phosphate-reconstituted low density lipoprotein nanovehicle (CaP@LDL) that would serve as a "Trojan horse" to carry STAT3-decoy ODNs into tumor cells and then regulate TRAIL-induced apoptosis...
2017: Theranostics
https://www.readbyqxmd.com/read/29158401/kinesin-dependent-mechanism-for-controlling-triglyceride-secretion-from-the-liver
#15
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/29158310/functional-role-of-extracellular-vesicles-and-lipoproteins-in-the-tumour-microenvironment
#16
REVIEW
Julien A Menard, Myriam Cerezo-Magaña, Mattias Belting
Cancer can be regarded as an invasive organ that exhibits unique plasticity provided by coordinated, cancer cell-stromal cell communication in the tumour microenvironment. Typical stress factors in the tumour niche, such as hypoxia and acidosis, are major drivers and modulators of these events. Recent findings reveal an important role of extracellular vesicles and lipoproteins in cancer cell adaption to exogenous stress. Adaptive mechanisms include stimulation of angiogenesis and increased metastasis. Here, we will discuss the similarities and distinct features of these endogenous nanoparticles and their roles as signalosomes and nutrient sources in cancer...
January 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29157910/vigilin-interacts-with-ctcf-and-is-involved-in-the-maintenance-of-imprinting-of-igf2-through-a-novel-rna-mediated-mechanism
#17
Xiaoqin Yu, Qiuying Liu, Jinyang He, Yuan Huang, Lei Jiang, Xiaoyan Xie, Ji Liu, Lihong Chen, Ling Wei, Yang Qin
Accumulating evidence has revealed the imprinting of insulin-like growth factor-2 gene (IGF2) is maintained by binding of CCCTC binding factor (CTCF) to the unmethylated imprinting control region (ICR) between IGF2 and H19 genes. We have previously reported that high-density lipoprotein binding protein (HDLBP/vigilin), a multiKH-domain protein, interacts with CTCF and coexists with it at several CTCF-binding sites on the ICR to regulate general gene expression of IGF2. However, the impact of the interaction on imprinting of IGF2 remains unclear...
November 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29157655/roles-of-high-apolipoprotein-e-blood-levels-and-hdl-in-development-of-familial-dysbetalipoproteinemia-in-%C3%AE%C2%B52%C3%AE%C2%B52-subjects
#18
James P Corsetti, Charles E Sparks, Stephan J L Bakker, Eke G Gruppen, Robin P F Dullaart
OBJECTIVE: Familial dysbetalipoproteinemia (FD) or Type III hyperlipoproteinemia is a mixed hyperlipidemia closely associated with the ε2ε2 genotype of the common APOE polymorphism although not all homozygotes progress to FD. Unlike the polymorphism, few studies explore effects of apolipoprotein E (apoE) blood levels on FD development. Likewise, despite the known apoE2 lipoprotein binding preference for high-density lipoprotein (HDL); little work exists exploring HDL in FD. Accordingly, this study was undertaken to investigate potential roles in FD development for apoE and HDL...
November 17, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/29157582/serum-lipid-profile-sleep-disordered-breathing-and-blood-pressure-in-the-elderly-a-10-year-follow-up-of-the-proof-synapse-cohort
#19
Denis Monneret, Jean-Claude Barthélémy, David Hupin, Delphine Maudoux, Sébastien Celle, Emilia Sforza, Frédéric Roche
OBJECTIVES: Dyslipidemia, sleep-disordered breathing (SDB) and hypertension are comorbid factors evidenced in adults, but poorly studied in old people. This study aimed to examine the long-term evolution of the serum lipid profile, and its relationships with SDB and blood pressure (BP) in the elderly. METHODS: A ten-year follow-up of the prospective Prognostic Indicator of Cardiovascular and Cerebrovascular Events (PROOF) and the Autonomic Nervous System Activity, Aging and Sleep Apnea/Hypopnea (SYNAPSE) cohort, which initially included 1011 elderly subjects from the general population, and who were untreated by continuous positive airway pressure (CPAP)...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29157534/moderate-to-high-levels-of-cardiorespiratory-fitness-attenuate-the-effects-of-triglyceride-to-high-density-lipoprotein-cholesterol-ratio-on-coronary-heart-disease-mortality-in-men
#20
Stephen W Farrell, Carrie E Finley, Carolyn E Barlow, Benjamin L Willis, Laura F DeFina, William L Haskell, Gloria L Vega
OBJECTIVE: To examine the prospective relationships among cardiorespiratory fitness (CRF), fasting blood triglyceride to high density lipoprotein cholesterol ratio (TG:HDL-C), and coronary heart disease (CHD) mortality in men. METHODS: A total of 40,269 men received a comprehensive baseline clinical examination between January 1, 1978, and December 31, 2010. Their CRF was determined from a maximal treadmill exercise test. Participants were divided into CRF categories of low, moderate, and high fit by age group and by TG:HDL-C quartiles...
November 14, 2017: Mayo Clinic Proceedings
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