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https://www.readbyqxmd.com/read/29667690/metal-organic-frameworks-as-affinity-agents-to-enhance-the-microdialysis-sampling-efficiency-of-fatty-acids
#1
Hui Yang, Tuo Li, Lu Liu, Na Li, Ming Guan, Yangyang Zhang, Zhenpeng Wang, Zhenwen Zhao
Microdialysis (MD) has been extensively used for in vivo sampling of hydrophilic analytes such as neurotransmitters and drug metabolites. In contrast, there have been few reports on sampling of lipophilic analytes by MD. Lipophilic analytes are easily adsorbed on the surfaces of the dialysis membrane and the inner wall of tubing, which leads to a very low relative recovery (RR). In this work, a strategy to develop an enhanced MD sampling of fatty acids (FAs) by using metal-organic frameworks (MOFs) as affinity agents in the perfusion fluid was investigated...
April 18, 2018: Analyst
https://www.readbyqxmd.com/read/29666523/process-optimization-and-oxidative-stability-of-omega-3-ice-cream-fortified-with-flaxseed-oil-microcapsules
#2
Avinash Gowda, Vivek Sharma, Ankit Goyal, A K Singh, Sumit Arora
Microencapsulated flaxseed oil powder (MFOP) was supplemented for the fortification of α-linolenic acid (ALA, ω-3 fatty acid) in ice cream. Processing parameters were optimized in terms of the stage of homogenization of ice-cream mix, level of fortification (3, 4 and 5%) and flavors (vanilla, butter scotch and strawberry). Data revealed that free fatty acids increased significantly during first 15 days in all the samples and then remained constant. Peroxide value and thiobarbituric acid value first increased up to 30 and 45 days, respectively; and then decreased followed by a gradual increase up to 120 days...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666152/phenylmethimazole-abrogates-diet-induced-inflammation-glucose-intolerance-and-nafld
#3
Ashley Patton, Tyler Church, Caroline Wilson, Jean Thuma, Douglas J Goetz, Darlene E Berryman, Edward O List, Frank L Schwartz, Kelly D McCall
Nonalcoholic fatty liver disease (NAFLD) is the hepatic manifestation of both metabolic and inflammatory diseases and has become the leading chronic liver disease worldwide. High fat (HF) diets promote an increased uptake and storage of free fatty acids (FFAs) and triglycerides (TGs) in hepatocytes, which initiates steatosis and induces lipotoxicity, inflammation, and insulin resistance. Activation and signaling of Toll-like receptor 4 (TLR4) by FFAs induces inflammation evident in NAFLD and insulin resistance...
April 17, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29665358/hyperinsulinemic-euglycemic-clamp-over-the-first-year-of-use-of-depot-medroxyprogesterone-acetate-as-a-contraceptive
#4
Vaneska Melhado-Kimura, Gisele Almeida Batista, Aglécio Luiz de Souza, Priscilla de Nazaré Silva Dos Santos, Sarah Monte Alegre, Elizabeth João Pavin, Luis Bahamondes, Arlete Fernandes
OBJECTIVE: The literature lacks data on the use of the gold-standard hyperinsulinemic-euglycemic clamp (HEC) technique for the evaluation of insulin resistance (IR) in depot-medroxyprogesterone acetate (DMPA) users. This study assessed carbohydrate metabolism in non-obese users of DMPA using the HEC technique. STUDY DESIGN: A prospective, non-randomized, comparative study conducted at the Family Planning Clinic/Metabolic Unit, University of Campinas, Brazil. Forty-eight women aged 18-39 years underwent HEC: 30 initiating use of DMPA and 18 initiating use of a copper intrauterine device (IUD)...
April 14, 2018: Contraception
https://www.readbyqxmd.com/read/29663401/variants-in-the-ppargc1a-gene-may-influence-the-effect-of-fat-intake-on-resting-metabolic-rate-in-obese-women
#5
Sajjad Moradi, Khadijeh Mirzaei, Zhila Maghbooli, Ahmed A Abdurahman, Seyed Ali Keshavarz
Recent studies have shown that dietary intake and genetic variants play a decisive role in the risk of obesity. Therefore, this study was designed to examine the interaction between dietary fat and PPARGC1A polymorphisms on the level of resting metabolic rate (RMR). We enrolled 288 Iranian overweight and obese women in this cross-sectional study. We sequenced the 648 b.p. DNA in Exon 8 of PPARGC1A gene. We analyzed the two single-nucleotide polymorphisms, namely rs11290186 and rs2970847, in this region. All participants were assessed for RMR, dietary intake, and body composition...
April 16, 2018: Lipids
https://www.readbyqxmd.com/read/29663374/oleic-acid-promotes-prostate-cancer-malignant-phenotype-via-the-g-protein-coupled-receptor-ffa1-gpr40
#6
Antonietta Liotti, Vincenzo Cosimato, Paola Mirra, Gaetano Calì, Domenico Conza, Agnese Secondo, Gelsomina Luongo, Daniela Terracciano, Pietro Formisano, Francesco Beguinot, Luigi Insabato, Luca Ulianich
Prostate cancer (PCa) is the most commonly diagnosed malignancy in men and the second leading cause of cancer-related death in industrialized countries. Epidemiologic evidence suggests that obesity promotes aggressive PCa. Recently, a family of Free Fatty Acid (FFA) receptors (FFARs) has been identified and reported to affect several crucial biological functions of tumor cells such as proliferation, invasiveness, and apoptosis. Here we report that oleic acid (OA), one of the most prevalent FFA in human plasma, increases proliferation of highly malignant PC3 and DU-145 PCa cells...
April 16, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29662454/the-biological-clock-a-pivotal-hub-in-non-alcoholic-fatty-liver-disease-pathogenesis
#7
REVIEW
Gianluigi Mazzoccoli, Salvatore De Cosmo, Tommaso Mazza
Non-alcoholic fatty liver disease (NAFLD) is the most frequent hepatic pathology in the Western world and may evolve into steatohepatitis (NASH), increasing the risk of cirrhosis, portal hypertension and hepatocellular carcinoma. NAFLD derives from the accumulation of hepatic fat due to discrepant free fatty acid metabolism. Other factors contributing to this are deranged nutrients and bile acids fluxes as well as alterations in nuclear receptors, hormones, and intermediary metabolites, which impact on signaling pathways involved in metabolism and inflammation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29661693/phosphorylation-of-beta-3-adrenergic-receptor-at-serine-247-by-erk-map-kinase-drives-lipolysis-in-obese-adipocytes
#8
Shangyu Hong, Wei Song, Peter-James H Zushin, Bingyang Liu, Mark P Jedrychowski, Amir I Mina, Zhaoming Deng, Dimitrije Cabarkapa, Jessica A Hall, Colin J Palmer, Hassan Aliakbarian, John Szpyt, Steven P Gygi, Ali Tavakkoli, Lydia Lynch, Norbert Perrimon, Alexander S Banks
OBJECTIVE: The inappropriate release of free fatty acids from obese adipose tissue stores has detrimental effects on metabolism, but key molecular mechanisms controlling FFA release from adipocytes remain undefined. Although obesity promotes systemic inflammation, we find activation of the inflammation-associated Mitogen Activated Protein kinase ERK occurs specifically in adipose tissues of obese mice, and provide evidence that adipocyte ERK activation may explain exaggerated adipose tissue lipolysis observed in obesity...
March 29, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29661138/a-coxiella-burnetii-phospholipase-a-homolog-plda-is-required-for-optimal-growth-in-macrophages-and-developmental-form-lipid-remodeling
#9
Christopher M Stead, Diane C Cockrell, Paul A Beare, Heather E Miller, Robert A Heinzen
BACKGROUND: Many gram-negative bacteria produce an outer membrane phospholipase A (PldA) that plays an important role in outer membrane function and is associated with virulence. RESULTS: In the current study, we characterized a pldA mutant of Coxiella burnetii, an intracellular gram-negative pathogen and the agent of human Q fever. The C. burnetti pldA open reading frame directs synthesis of a protein with conserved PldA active site residues. A C. burnetii ΔpldA deletion mutant had a significant growth defect in THP-1 macrophages, but not axenic medium, that was rescued by complementation...
April 16, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29660814/effects-of-cd36-genotype-on-oral-perception-of-oleic-acid-supplemented-safflower-oil-emulsions-in-two-ethnic-groups-a-preliminary-study
#10
Brenda Burgess, Melania Melis, Katelyn Scoular, Michael Driver, Karen M Schaich, Kathleen L Keller, Iole Tomassini Barbarossa, Beverly J Tepper
Previous studies demonstrate humans can detect fatty acids via specialized sensors on the tongue, such as the CD36 receptor. Genetic variation at the common single nucleotide polymorphism rs1761667 of CD36 has been shown to differentially impact the perception of fatty acids, but comparative data among different ethnic groups are lacking. In a small cohort of Caucasian and East Asian young adults, we investigated if: (1) participants could detect oleic acid (C18:1) added to safflower oil emulsions at a constant ratio of 3% (w/v); (2) supplementation of oleic acid to safflower oil emulsions enhanced perception of fattiness and creaminess; and (3) variation at rs1761667 influenced oleic acid detection and fat taste perception...
April 16, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29659358/-role-of-the-enterocyte-in-type-2-diabetes-mellitus-associated-dyslipidemia
#11
Cecilia I Closs, Martín A Ruiz Diaz, Alberto M Cafferata, Damasia Becú-Villalobos, Juan P Nogueira
In type 2 diabetes mellitus there is an overproduction of chylomicron in the postprandial state that is associated with increased cardiovascular risk. Current evidence points out a leading role of enterocyte in dyslipidemia of type 2 diabetes mellitus, since it increases the production of apolipoprotein B-48 in response to a raise in plasma free fatty acids and glucose. The chylomicron metabolism is regulated by many factors apart from ingested fat, including hormonal and metabolic elements. More recently, studies about the role of gut hormones, have demonstrated that glucagon-like peptide-1 decreases the production of apolipoprotein B-48 and glucagon-like peptide-2 enhances it...
2018: Medicina
https://www.readbyqxmd.com/read/29658532/changes-of-albumin-secondary-structure-after-palmitic-acid-binding-ft-ir-spectroscopic-study
#12
Adam Oleszko, Jadwiga Hartwich, Marlena Gąsior-Głogowska, Sylwia Olsztyńska-Janus
PURPOSE: Albumin is an universal transport protein. Plasma pool of free fatty acids arising from triglyceride hydrolysis, critical in energy metabolism and etiology of metabolic disorders is transported by albumin. According to various studies albumin has from seven to nine binding sites with diverse affinity to long chain fatty acids. X-ray diffraction crystallography measurements have provided data only for pure human serum albumin or albumin with fully saturated binding sites. These results have shown that amount of -helices is higher after fatty acids binding...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29658085/effect-of-natural-cytokine-complex-on-the-structure-and-metabolism-of-the-cardiac-conduction-system-in-the-myocardium-under-normally-and-increased-hemodynamic-load
#13
M S Tverskaya, L V Gankovskaya, V V Sukhoparova, A O Virganskii
Effect of natural complex of cytokines with activity of IL-1, IL-2, IL-6, TNF, MIF, and GTFβ on the structure and metabolism of conduction cardiomyocytes was assessed in the control and under acute experimental aortic stenosis. After systemic administration of the cytokine complex in the control, structural abnormalities were revealed in a relatively low number of conduction cardiomyocytes; their relative number increased in the left ventricle and interventricular septum. When the complex was administered against the background of aortic stenosis, morphological changes in the conduction system were seen in a significant number of cells with their plasma imbibition, especially in the left ventricle and interventricular septum...
April 16, 2018: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29657001/accuracy-of-a-diagnostic-model-based-on-serum-biochemical-parameters-in-detecting-cows-at-an-increased-risk-of-chronic-fascioliasis
#14
Sławomir J Kowalczyk, Michał Czopowicz, Corinna N Weber, Elisabeth Müller, Jarosław Kaba
In adult cattle Fasciola hepatica infection usually follows a chronic subclinical course, and reduces both the milk yield and milk quality, resulting in considerable financial losses. Effective control of the disease is based on reliable identification of asymptomatically infected individuals, which now requires special parasitological or serological diagnostic tests. It is also known that F. hepatica infection induces alterations in some serum biochemical parameters. Therefore, the study was conducted to develop a model based on serum biochemical parameters allowing to identify cows at higher risk of chronic fascioliasis...
April 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29656610/fipronil-recognition-by-the-fa1-site-of-human-serum-albumin
#15
Paolo Ascenzi, Loris Leboffe, Daniele Toti, Fabio Polticelli, Viviana Trezza
Fipronil is a broad-spectrum pesticide widely used in agriculture, horticulture, and forestry. Because fipronil can cause a variety of toxic effects in animals and humans, its use is authorized as a pesticide in veterinary medicinal products for pets, but not for the treatment of livestock animals whose products are intended for consumption. Recently, however, the presence of fipronil residues has been detected in the eggs and meat of layer hens from farms located in different European countries. Given the relevance of fipronil toxicity for human health, it is important to gain information concerning its fate in the human body, including its binding mode to human serum albumin (HSA), the most abundant protein in plasma...
April 15, 2018: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/29656308/bacterial-lipid-modification-of-icp11-and-a-new-elisa-system-applicable-for-wssv-infection-detection
#16
Vidhyapriya Murugan, Krishnan Sankaran
In ELISA, a popular analytical diagnostic tool, the stable non-covalent immobilization (coating) of hydrophilic proteins/peptides on to hydrophobic polystyrene surface has remained a major common challenge. Recombinant bacterial lipid modification of proteins in Escherichia coli system has been shown in this study to solve this problem owing to the hydrophobic anchorage provided by three fatty acyl groups in N-acyl-S-diacylglyceryl Cys at the N-terminus. Exploiting this first post-translational protein engineering, the most abundantly expressed white spot syndrome viral protein ICP11 was lipid-modified and tested as a new target in a new ELISA method useful to shrimp farming...
April 14, 2018: Marine Biotechnology
https://www.readbyqxmd.com/read/29655790/hdac11-deletion-reduces-fructose-induced-cardiac-dyslipidemia-apoptosis-and-inflammation-by-attenuating-oxidative-stress-injury
#17
Xiao-Di Fan, Lan-Lan Wan, Man Duan, Shan Lu
Diabetes mellitus (DM) is a risk factor for abnormal heart development, but the molecular mechanism remains obscure. Histone deacetylase 11 (HDAC11), the most recently identified histone deacetylase, is the sole member of class IV HDACs. However, its role in diabetic cardiac injury is still poorly understood. In the present study, we attempted to explore the effects of HDAC11 on fructose (Fru)-induced cardiac injury using the wild type (HDAC11+/+ ) and knockout (HDAC11-/- ) mice. The results indicated that HDAC11 was significantly expressed in human and mouse diabetic heart failure (DHF) hearts...
April 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29655747/comparative-performances-of-lactoferrin-loaded-liposomes-under-in-vitro-adult-and-infant-digestion-models
#18
Weilin Liu, Junmeng Lu, Aiqian Ye, Qingqing Xu, Mengmeng Tian, Youyu Kong, Fuqiang Wei, Jianzhong Han
There remain gaps in our understanding of the fate of liposomes in the infant gastrointestinal tract, especially regarding essential proteins such as lactoferrin. Models in vitro that mirrored digestion in the stomach and intestine of infants and adults were used to explore the behaviour of lactoferrin-loaded liposomes. The liposomes behaved differently in these environments, with less hydrolysis of encapsulated lactoferrin under infant model conditions. Compared to the adult model (1000 ± 66 μM mL-1 ), fewer free fatty acids were released (500 ± 43 μM mL-1 ) from liposomal bilayers and there was less alteration in functional groups of phospholipids membranes, based on pH and FTIR after infant model digestion...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29653099/herbacetin-a-flaxseed-flavonoid-ameliorates-high-percent-dietary-fat-induced-insulin-resistance-and-lipid-accumulation-through-the-regulation-of-hepatic-lipid-metabolizing-and-lipid-regulating-enzymes
#19
Chinnadurai Veeramani, Mohammed A Alsaif, Khalid S Al-Numair
Healthy plants and their constituents have been considered as a safe remedy for the treatment of obesity and obesity associated diseases. Herbacetin is a dietary flavonoid that has been explored for many pharmacological activities; but, the anti-hyperglycaemic and anti-hyperlipidemic properties of herbacetin have not yet been explored. The present study was performed to evaluate the ameliorative effect of herbacetin on high-fat diet-induced hyperglycaemia and hyperlipidemia in 57BL/6 J mice. Obesity associated insulin resistance was induced by continuously feeding the mice with high-fat diet for 10 weeks...
April 10, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29652575/olive-fruit-blends-modulate-lipid-sensing-nuclear-receptor-ppar%C3%AE-cell-survival-and-oxidative-stress-response-in-human-osteoblast-cells
#20
Sergio Ammendola, Rossana Cocchiola, Mariangela Lopreiato, Laura Politi, Roberto Scandurra, Anna Maria Giusti, Anna Scotto d'Abusco
OBJECTIVE: The aim of the present study was to investigate how different extravirgin olive oils (EVOOs), obtained by blending Olea europea cultivars, could influence the cell growth, the response to inflammatory stimuli, and oxidative stress in a culture of the osteosarcoma cell line Saos-2. METHODS: Three different extravirgin olive oils were physicochemically characterized, determining the free acidity, the oxidation status, the polyphenols content, and the antioxidative activity...
April 13, 2018: Journal of the American College of Nutrition
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