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lipid accumulation

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https://www.readbyqxmd.com/read/29150932/high-fat-diet-induced-oxidative-stress-blocks-hepatocyte-nuclear-factor-4%C3%AE-and-leads-to-hepatic-steatosis-in-mice
#1
Dongsheng Yu, Gang Chen, Minglin Pan, Jia Zhang, Wenping He, Yang Liu, Xue Nian, Liang Sheng, Bin Xu
Nonalcoholic fatty liver disease (NAFLD) is the most common form of chronic liver disease with manifestation of over-accumulation of fat in liver. Increasing evidences indicate that NAFLD may be in part caused by malfunction of very low density lipoprotein (VLDL) secretion. Hepatocyte nuclear factor 4α (HNF4α), a nuclear receptor protein, plays an important role in sustain hepatic lipid homeostasis via transcriptional regulation of genes involved in secretion of VLDL, such as apolipoprotein B (ApoB). However, the exact functional change of HNF4α in NAFLD remains to be elucidated...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29149902/metabolism-of-aromatics-by-trichosporon-oleaginosus-while-remaining-oleaginous
#2
Allison Yaguchi, Alana Robinson, Erin Mihealsick, Mark Blenner
BACKGROUND: The oleaginous yeast, Trichosporon oleaginosus, has been extensively studied for its ability to metabolize non-conventional feedstocks. These include phenol-containing waste streams, such as distillery wastewater, or streams consisting of non-conventional sugars, such as hydrolyzed biomass and various bagasse. An initial BLAST search suggests this yeast has putative aromatic metabolizing genes. Given the desirability to valorize underutilized feedstocks such as lignin, we investigated the ability of T...
November 17, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/29149719/tissue-specific-bioaccumulation-of-long-chain-perfluorinated-carboxylic-acids-and-halogenated-methylbipyrroles-in-dall-s-porpoises-phocoenoides-dalli-and-harbor-porpoises-phocoena-phocoena-stranded-in-northern-japan
#3
Yukiko Fujii, Yoshihisa Kato, Kentarou Sakamoto, Takashi Matsuishi, Harada H Kouji, Akio Koizumi, Osamu Kimura, Tetsuya Endo, Koichi Haraguchi
This study investigated accumulation of perfluoroalkyl substances (PFASs), persistent organochlorines (OCs), and naturally produced halogenated compounds (NHCs), including brominated methylbipyrroles and methoxylated bromodiphenyl ethers, in liver, blood, and blubber from Dall's porpoises (Phocoenoides dalli) and harbor porpoises (Phocoena phocoena) stranded in Hokkaido, northern Japan. Profiles of the PFASs were dominated by perfluoroundecanoic acid and perfluorotridecanoic acid, both of which accounted for 70% of the total measured PFAS concentrations in both porpoise species...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29149288/overexpression-of-seipin1-increases-oil-in-hydroxy-fatty-acid-accumulating-seeds
#4
Daniel Lunn, James G Wallis, John Browse
While plant oils are an important source of food, plants also produce oils containing specialized fatty acids with chemical and physical properties valued in industry. Ricinoleic acid, a hydroxy-fatty acid (HFA) produced in the seed of castor (Ricinus communis), is of particular value with a wide range of applications. Since castor cultivation is currently successful only in tropic climates, and because castor seed contain the toxin ricin, there are ongoing efforts to develop a temperate crop capable of HFA biosynthesis...
November 15, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29148037/growth-performance-fatty-acid-composition-lipid-deposition-and-hepatic-lipid-metabolism-related-gene-expression-in-juvenile-pond-loach-misgurnus-anguillicaudatus-fed-diets-with-different-dietary-soybean-oil-levels
#5
Y Li, Z Jia, X Liang, D Matulic, M Hussein, J Gao
A 10 week feeding trial was conducted to evaluate the effects of different dietary soybean oil (SO) levels on growth performance, fatty-acid composition and lipid deposition in viscera, histology and histochemistry of liver, intestine and hepatic-lipid metabolism-related gene expressions in pond loach Misgurnus anguillicaudatus juveniles. Misgurnus anguillicaudatus (mean ± s.d. mass 0·40 ± 0·01 g) were fed five experimental diets containing SO at different concentrations: 0, 20, 32, 56 and 100% SO and a diet containing 100% fish oil (100% FO)...
November 17, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/29147129/the-effect-of-exercise-training-on-upregulation-of-molecular-markers-of-bile-acid-metabolism-in-the-liver-of-ovariectomized-rats-fed-a-cholesterol-rich-diet
#6
Zahra Farahnak, Luciane Magri Tomaz, Raynald Bergeron, Natalie Chapados, Jean-Marc Lavoie
BACKGROUND: Small heterodimer partner (SHP) is an important transcriptional factor involved in the regulation of glucose, lipid, and bile acid metabolism in the liver. SHP has been reported to be down-regulated in ovariectomized (Ovx) mice and up-regulated by estrogens suggesting a link between estrogens and SHP. The aim of the present study was to determine the effects of exercise training on SHP and key molecular markers of cholesterol and bile acid homeostasis in Ovx rats under cholesterol feeding...
July 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29145892/association-between-plasma-phospholipid-saturated-fatty-acids-and-metabolic-markers-of-lipid-hepatic-inflammation-and-glycaemic-pathways-in-eight-european-countries-a-cross-sectional-analysis-in-the-epic-interact-study
#7
Ju-Sheng Zheng, Stephen J Sharp, Fumiaki Imamura, Albert Koulman, Matthias B Schulze, Zheng Ye, Jules Griffin, Marcela Guevara, José María Huerta, Janine Kröger, Ivonne Sluijs, Antonio Agudo, Aurelio Barricarte, Heiner Boeing, Sandra Colorado-Yohar, Courtney Dow, Miren Dorronsoro, Pia T Dinesen, Guy Fagherazzi, Paul W Franks, Edith J M Feskens, Tilman Kühn, Verena Andrea Katzke, Timothy J Key, Kay-Tee Khaw, Maria Santucci de Magistris, Francesca Romana Mancini, Elena Molina-Portillo, Peter M Nilsson, Anja Olsen, Kim Overvad, Domenico Palli, Jose Ramón Quirós, Olov Rolandsson, Fulvio Ricceri, Annemieke M W Spijkerman, Nadia Slimani, Giovanna Tagliabue, Anne Tjonneland, Rosario Tumino, Yvonne T van der Schouw, Claudia Langenberg, Elio Riboli, Nita G Forouhi, Nicholas J Wareham
BACKGROUND: Accumulating evidence suggests that individual circulating saturated fatty acids (SFAs) are heterogeneous in their associations with cardio-metabolic diseases, but evidence about associations of SFAs with metabolic markers of different pathogenic pathways is limited. We aimed to examine the associations between plasma phospholipid SFAs and the metabolic markers of lipid, hepatic, glycaemic and inflammation pathways. METHODS: We measured nine individual plasma phospholipid SFAs and derived three SFA groups (odd-chain: C15:0 + C17:0, even-chain: C14:0 + C16:0 + C18:0, and very-long-chain: C20:0 + C22:0 + C23:0 + C24:0) in individuals from the subcohort of the European Prospective Investigation into Cancer and Nutrition (EPIC)-InterAct case-cohort study across eight European countries...
November 17, 2017: BMC Medicine
https://www.readbyqxmd.com/read/29145152/possible-role-of-arthrospira-platensis-in-reversing-oxidative-stress-mediated-liver-damage-in-rats-exposed-to-lead
#8
Samah R Khalil, Walaa M Elhady, Yaser H A Elewa, Noura E Abd El-Hameed, Sozan A Ali
Environmental pollutants, particularly metallic elements, mobilized and released into the environment, eventually accumulate in the food chain and thus pose a serious threat to human and animal health. In the present study, the role of Arthrospira (Spirulina platensis; SP) as a protector against oxidative stress-mediated liver damage induced by an exposure to lead acetate (LA; as a metallic pollutant) was assessed. To achieve this aim, rats were orally administered with 300 mg/kg bw SP for 15 days, before and concurrently with an intraperitoneal injection of 50 mg/kg bw LA (6 injections throughout 15 days)...
November 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29145127/effect-of-lipid-free-microalgal-biomass-and-waste-glycerol-on-growth-and-lipid-production-of-scenedesmus-obliquus-innovative-waste-recycling-for-extraordinary-lipid-production
#9
Abd El-Fatah Abomohra, Hamed Eladel, Mohamed El-Esawi, Shuang Wang, Qian Wang, Zhixia He, Yongqiang Feng, Hao Shang, Dieter Hanelt
In the present work, a novel approach of using growth medium with different substitutions of lipid-free algal hydrolysate (LFAH, 0, 5, 10 and 15%) and/or waste glycerol (WG, 0, 5, 10 and 20 g L(-1)) for enhanced biodiesel production from Scenedesmus obliquus was studied. Combination of different concentrations of WG with 15% LFAH showed the maximum significant biomass productivity, which represented 27.4, 30.5 and 28.9% over the control at combined 5, 10 and 20 g L(-1) WG, respectively. The combinations of different LFAH with 20 g L(-1) WG showed the maximum significant lipid accumulation, where lipid productivity showed its maximum significant value of 59...
November 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29145114/boosting-nannochloropsis-oculata-growth-and-lipid-accumulation-in-a-lab-scale-open-raceway-pond-characterized-by-improved-light-distributions-employing-built-in-planar-waveguide-modules
#10
Yahui Sun, Yun Huang, Qiang Liao, Ao Xia, Qian Fu, Xun Zhu, Jingwei Fu
Aiming at alleviating the adverse effect of poor light penetrability on microalgae growth, planar waveguide modules functioned as diluting and redistributing the intense incident light within microalgae culture more homogeneously were introduced into a lab-scale open raceway pond (ORP) for Nannochloropsis oculata cultivation. As compared to the conventional ORP, the illumination surface area to volume ratio and effective illuminated volume percentage in the proposed ORP were respectively improved by 5.53 times and 19...
November 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29145070/arsenic-forms-and-their-combinations-induce-differences-in-phenolic-accumulation-in-ulmus-laevis-pall
#11
Kinga Drzewiecka, Monika Gąsecka, Paweł Rutkowski, Zuzanna Magdziak, Piotr Goliński, Mirosław Mleczek
Total phenolics and the profile of phenolic acids and flavonoids were investigated in the roots and leaves of Ulmus laevis cultured on the medium with inorganic and organic arsenic - As(III), As(V) and DMA(V) at 0.06mM and their equimolar combinations. Further, the accumulation of salicylic acid (free and glucoside-bound) and lipid oxidation were assayed following a three-month long experiment. As treatment caused elevated production of phenolics, which was higher in photosynthetic tissue than in roots for all As forms and their combinations, and their overall content was correlated with the accumulation of organic As in roots and As(III) in leaves...
November 11, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29144994/gene-pathways-associated-with-mitochondrial-function-oxidative-stress-and-telomere-length-are-differentially-expressed-in-the-liver-of-rats-fed-lifelong-on-virgin-olive-sunflower-or-fish-oils
#12
Alfonso Varela-Lopez, María Patricia Pérez-López, César Luis Ramirez-Tortosa, Maurizio Battino, Sergio Granados-Principal, María Del Carmen Ramirez-Tortosa, Julio José Ochoa, Laura Vera-Ramirez, Francesca Giampieri, José Luis Quiles
This study investigates the effect of lifelong intake of different fat sources rich in monounsaturated (virgin olive oil), n6 polyunsaturated (sunflower oil) or n3 polyunsaturated (fish oil) fatty acids in the aged liver. Male Wistar rats fed lifelong on diets differing in the fat source were killed at 6 and at 24 months of age. Liver histopathology, mitochondrial ultrastructure, biogenesis, oxidative stress, mitochondrial electron transport chain, relative telomere length and gene expression profiles were studied...
September 20, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29144989/cysteine-dioxygenase-1-mediates-erastin-induced-ferroptosis-in-human-gastric-cancer-cells
#13
Shihui Hao, Jiang Yu, Wanming He, Qiong Huang, Yang Zhao, Bishan Liang, Shuyi Zhang, Zhaowei Wen, Shumin Dong, Jinjun Rao, Wangjun Liao, Min Shi
BACKGROUND: Ferroptosis is a recently discovered form of iron-dependent nonapoptotic cell death. It is characterized by loss of the activity of the lipid repair enzyme, glutathione peroxidase 4 (GPX4), and accumulation of lethal reactive lipid oxygen species. However, we still know relatively little about ferroptosis and its molecular mechanism in gastric cancer (GC) cells. Here, we demonstrate that erastin, a classic inducer of ferroptosis, induces this form of cell death in GC cells and that cysteine dioxygenase 1 (CDO1) plays an important role in this process...
November 13, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29144802/lipid-accumulation-product-visceral-adiposity-index-and-chinese-visceral-adiposity-index-as-markers-of-cardiometabolic-risk-in-adult-growth-hormone-deficiency-patients-a-cross-sectional-study
#14
Xin Xie, Qing Li, Lingmin Zhang, Wei Ren
OBJECTIVE: Adult growth hormone deficiency (AGHD) is associated with cardiometabolic risk factors. Given that cardiovascular disease (CVD) is an important cause of morbidity and mortality in the AGHD population, there is a need for alternative, non-invasive methods of assessing cardiometabolic risk in this population. Chinese visceral adiposity index (CVAI) is a new marker of visceral fat dysfunction that is based on age, body mass index (BMI), waist circumference (WC) and metabolic parameters...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29143862/a20-prevents-obesity-induced-development-of-cardiac-dysfunction
#15
Wenjing Xu, Cheng Wang, Minglu Liang, Long Chen, Qin Fu, Fengxiao Zhang, Yan Wang, Dan Huang, Kai Huang
Obesity and an increased free fatty acid (FFA) level are tightly linked, leading to aberrant oxidative stress, inflammation, apoptosis, and progression to cardiovascular disorders. A20 is a ubiquitin-modifying enzyme that plays a significant role in the negative regulation of inflammatory response. Here, we study the role of A20 in obesity-induced heart injury and explore the underlying mechanisms. A20 expression was first increased in mouse hearts after 4 weeks of a high-fat diet (HFD) and then was gradually decreased in the following 20 weeks...
November 16, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29142415/are-polyunsaturated-fatty-acid-metabolites-the-protective-effect-of-4-hydroxytyrosol-on-human-red-blood-cell-membranes-and-oxidative-damage-4-hydroxyalkenals-compatible-in-hypertriglyceridemic-patients
#16
Giuseppe Gallo, Rosalinda Bruno, Adele Taranto, Guglielmo Martino
Background: Increased levels of malondialdehyde (MDA) and 4-hydroxynonenal (HNE) are demonstrated in plasma of uremic patients. A study showed that the comparison of erythrocytes of healthy and diseased patients (obese, hypertensive, and Type 2 diabetics) with age is associated to a disturbed oxidant/antioxidant balance when obesity is associated with hypertension. 4-hydroxytyrosol is shown to significantly protect red blood cells (RBCs) from oxidative damage (4-HNE). In literature, there are partial discussions on the role of lipids and their oxidation products...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141998/vanillic-acid-attenuates-obesity-via-activation-of-the-ampk-pathway-and-thermogenic-factors-in-vivo-and-in-vitro
#17
Yunu Jung, Jinbong Park, Hye-Lin Kim, Jung-Eun Sim, Dong-Hyun Youn, JongWook Kang, Seona Lim, Mi-Young Jeong, Woong Mo Yang, Seok-Geun Lee, Kwang Seok Ahn, Jae-Young Um
Energy expenditure is a target gaining recent interest for obesity treatment. The antiobesity effect of vanillic acid (VA), a well-known flavoring agent, was investigated in vivo and in vitro High-fat diet (HFD)-induced obese mice and genetically obese db/db mice showed significantly decreased body weights after VA administration. Two major adipogenic markers, peroxisome proliferator activated receptor γ (PPARγ) and CCAAT/enhancer-binding protein α (C/EBPα), were reduced while the key factor of energy metabolism, AMPKα, was increased in the white adipose tissue and liver tissue of VA-treated mice...
November 15, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29141954/tropical-drosophila-ananassae-of-wet-dry-seasons-show-cross-resistance-to-heat-drought-and-starvation
#18
Chanderkala Lambhod, Ankita Pathak, Ashok K Munjal, Ravi Parkash
Plastic responses to multiple environmental stressors in wet or dry seasonal populations of tropical Drosophila species have received less attention. We tested plastic effects of heat hardening, acclimation to drought or starvation, and changes in trehalose, proline and body lipids in Drosophila ananassae flies reared under wet or dry season-specific conditions. Wet season flies revealed significant increase in heat knockdown, starvation resistance and body lipids after heat hardening. However, accumulation of proline was observed only after desiccation acclimation of dry season flies while wet season flies elicited no proline but trehalose only...
November 15, 2017: Biology Open
https://www.readbyqxmd.com/read/29141949/microvascular-insulin-resistance-in-skeletal-muscle-and-brain-occurs-early-in-the-development-of-juvenile-obesity-in-pigs
#19
T Dylan Olver, Zachary Ian Grunewald, Thomas J Jurrissen, Rebecca Ek MacPherson, Paul J LeBlanc, Teagan R Schnurbusch, Alana M Czajkowski, Maurice Harold Laughlin, R Scott Rector, Shawn B Bender, Eric M Walters, Craig A Emter, Jaume Padilla
BACKGROUND: Impaired microvascular insulin signaling may develop prior to overt indices of microvascular endothelial dysfunction and represent an early pathological feature of adolescent obesity. Using a translational porcine model of juvenile obesity, we tested the hypotheses that in the early stages of obesity development, impaired insulin signaling manifests in skeletal muscle (triceps), brain (prefrontal cortex) and corresponding vasculatures, and that depressed insulin-induced vasodilation is reversible with acute inhibition of protein kinase C beta (PKCβ)...
November 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29141586/profiling-membrane-glycerolipids-during-%C3%AE-ray-induced-membrane-injury
#20
Guowei Zheng, Weiqi Li
BACKGROUND: γ-rays are high-energy radiation that cause a range of random injuries to plant cells. Most studies on this issue have focused on γ-ray-induced nucleotide damage and the production of reactive oxygen species in cells, so little is known about the glycerolipid metabolism during γ-rays induced membrane injury. Using an ESI-MS/MS-based lipidomic method, we analysed the lipidome changes in wild-type and phospholipase D (PLD)δ- and α1-deficient Arabidopsis after γ-ray treatment...
November 15, 2017: BMC Plant Biology
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