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Fatty acid oxidation

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https://www.readbyqxmd.com/read/28445477/mitochondrial-respiration-in-highly-aerobic-canines-in-the-non-raced-state-and-after-a-1600-km-sled-dog-race
#1
Benjamin Miller, Karyn Hamilton, Robert Boushel, Katherine Williamson, Verena Laner, Erich Gnaiger, Michael Davis
At the annual Iditarod Race, Alaskan Huskies repeatedly run for up to 8 hours at 16 km/h to complete 1600 km. We previously demonstrated high rates of mitochondrial protein synthesis in Alaskan Huskies, which we suspected allowed rapid remodeling of mitochondrial proteins in response to energetic stress. The purpose of this study was to examine mitochondrial respiration in permeabilized skeletal muscle fibers of Alaskan Huskies in the offseason (Non-raced) and following the 1600 km Iditarod Sled Dog Race (Raced)...
2017: PloS One
https://www.readbyqxmd.com/read/28444793/dietary-mannoheptulose-does-not-alter-glucose-or-lipid-metabolism-in-adult-labrador-retrievers
#2
L L McKnight, J France, D Wright, G Davenport, A K Shoveller
Mannoheptulose (MH), a glycolytic inhibitor, has been preliminarily investigated as a novel functional food ingredient for dogs. This study aimed to determine the effects of dietary MH, delivered as an extract of un-ripened avocados, on fatty acid and glucose kinetics in healthy adult Labrador Retriever dogs (n = 12 dogs). The study was a double-blindcrossover with each dog receiving both dietary treatments, control (CON) and MH (400 mg/kg of diet), in random order. Glucose and glycerol plasma turnover (Ra) and oxidation (Ox) were measured in fasting and in response to repeated meal feeding ("fed") with stable isotope tracers (U-(13) C-glucose, 1,1,2,3,3-D5 -glycerol) and indirect calorimetry...
April 26, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28444662/early-mitochondrial-adaptations-in-skeletal-muscle-to-obesity-and-obesity-resistance-differentially-regulated-by-high-fat-diet
#3
Jingyu Sun, Tao Huang, Zhengtang Qi, Songhui You, Jingmei Dong, Chen Zhang, Lili Qin, Yunhe Zhou, Shuzhe Ding
The mechanism for different susceptibilities to obesity after short-term high-fat diet (HFD) feeding is largely unknown. Given the close association between obesity occurrence and mitochondrial dysfunction, the early events in skeletal muscle mitochondrial adaptations between HFD-induced obesity (DIO) and HFD-induced obesity resistant (DIO-R) lean phenotype under excess nutritional environment were explored.ICR/JCL male mice were randomly divided into 2 groups, as follows: low-fat diet (LFD) and HFD groups...
April 25, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28443244/the-mitochondrial-voltage-dependent-anion-channel-1-ca-2-transport-apoptosis-and-their-regulation
#4
REVIEW
Varda Shoshan-Barmatz, Soumasree De, Alon Meir
In the outer mitochondrial membrane, the voltage-dependent anion channel 1 (VDAC1) functions in cellular Ca(2+) homeostasis by mediating the transport of Ca(2+) in and out of mitochondria. VDAC1 is highly Ca(2+)-permeable and modulates Ca(2+) access to the mitochondrial intermembrane space. Intramitochondrial Ca(2+) controls energy metabolism by enhancing the rate of NADH production via modulating critical enzymes in the tricarboxylic acid cycle and fatty acid oxidation. Mitochondrial [Ca(2+)] is regarded as an important determinant of cell sensitivity to apoptotic stimuli and was proposed to act as a "priming signal," sensitizing the organelle and promoting the release of pro-apoptotic proteins...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28442572/the-phospholipase-ipla2%C3%AE-is-a-major-mediator-releasing-oxidized-aliphatic-chains-from-cardiolipin-integrating-mitochondrial-bioenergetics-and-signaling
#5
Gao-Yuan Liu, Sung Ho Moon, Christopher M Jenkins, Maoyin Li, Harold F Sims, Shaoping Guan, Richard W Gross
Cardiolipin (CL) is a dimeric phospholipid with critical roles in mitochondrial bioenergetics and signaling. Recently, inhibition of the release of oxidized fatty acyl chains from CL by the calcium independent phospholipase A2γ (iPLA2γ) selective inhibitor (R)-BEL suggested that iPLA2γ is responsible for the hydrolysis of oxidized CL and subsequent signaling mediated by the released oxidized fatty acids. However, chemical inhibition by BEL is subject to off-target pharmacologic effects. Accordingly, to unambiguously determine the role of iPLA2γ in the hydrolysis of oxidized CL, we compared alterations in oxidized CLs and the release of oxidized aliphatic chains from CL in experiments with purified recombinant iPLA2γ, germline iPLA2γ(-/-) mice, cardiac myocyte-specific iPLA2γ transgenic mice, and wild-type mice...
April 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28442570/coordination-chemistry-controls-the-thiol-oxidase-activity-of-the-b12-trafficking-protein-cblc
#6
Zhu Li, Aranganathan Shanmuganathan, Markus Ruetz, Kazuhiro Yamada, Nicholas A Lesniak, Bernhard Kraeutler, Thomas C Brunold, Markos Koutmos, Ruma Banerjee
The cobalamin or B12 cofactor supports sulfur and one-carbon metabolism and the catabolism of odd-chain fatty acids, branched-chain amino acids and cholesterol. CblC is a B12 processing enzyme involved in an early cytoplasmic step in the cofactor trafficking pathway. It catalyzes the glutathione (GSH)-dependent dealkylation of alkylcobalamins and the reductive decyanation of cyanocobalamin. CblC from Caenorhabdiitis elegans (ceCblC) also exhibits a robust thiol oxidase activity converting reduced GSH to oxidized GSSG with concomitant scrubbing of ambient dissolved O2 The mechanism of thiol oxidation catalyzed by ceCblC is not known...
April 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28441536/the-effect-of-forage-types-on-the-fatty-acid-profile-lipid-and-protein-oxidation-and-retail-colour-stability-of-muscles-from-white-dorper-lambs
#7
Gerlane F De Brito, Benjamin W B Holman, Shawn R McGrath, Michael A Friend, Remy van de Ven, David L Hopkins
The aim of this study was to evaluate the effect of different forage-types on lamb meat quality parameters. White Dorper lambs that had grazed five forage-types, were slaughtered commercially. At 24h post-mortem, the m. longissimus lumborum (LL) was removed from one side, sliced into three equal sub-samples, vacuum packaged and assigned to ageing periods (5, 12 or 40days); the other side of LL was aged for 5days. The m. adductor femoris was used for fatty acid analysis. Lambs fed chicory+arrowleaf clover had the highest concentration of health claimable omega-3 fatty acids and the lowest omega-6:omega-3 fatty acid ratio...
April 4, 2017: Meat Science
https://www.readbyqxmd.com/read/28441337/a-study-of-the-differential-effects-of-eicosapentaenoic-acid-epa-and-docosahexaenoic-acid-dha-on-gene-expression-profiles-of-stimulated-thp-1-macrophages
#8
Bénédicte Allam-Ndoul, Frédéric Guénard, Olivier Barbier, Marie-Claude Vohl
Background: An appropriate intake of omega-3 (n-3) fatty acids (FAs) such as eicosapentaenoic and docosahexaenoic acid (EPA/DHA) from marine sources is known to have anti-inflammatory effects. However, molecular mechanisms underlying their beneficial effects on health are not fully understood. The aim of the present study was to characterize gene expression profiles of THP-1 macrophages, incubated in either EPA or DHA and stimulated with lipopolysaccharide (LPS), a pro-inflammatory agent. Methods: THP-1 macrophages were incubated into 10, 50 and 75 µM of EPA or DHA for 24 h, and 100 nM of LPS was added to the culture media for 18 h...
April 25, 2017: Nutrients
https://www.readbyqxmd.com/read/28439717/negligible-effect-of-enos-palmitoylation-on-fatty-acid-regulation-of-contraction-in-ventricular-myocytes-from-healthy-and-hypertensive-rats
#9
Chun Li Jin, Yu Na Wu, Ji Hyun Jang, Zai Hao Zhao, Goo Taeg Oh, Sung Joon Kim, Yin Hua Zhang
S-palmitoylation is an important post-translational modification that affects the translocation and the activity of target proteins in a variety of cell types including cardiomyocytes. Since endothelial nitric oxide synthase (eNOS) is known to be palmitoylated and the activity of eNOS is essential in fatty acid-dependent β-oxidation in muscle, we aimed to test whether palmitoylation of eNOS is involved in palmitic acid (PA) regulation of left ventricular (LV) myocyte contraction from healthy (sham) and hypertensive (HTN) rats...
April 25, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28439422/anti-aging-effect-and-gene-expression-profiling-of-dung-beetle-glycosaminoglycan-in-aged-rats
#10
Mi Young Ahn, Ban Ji Kim, Ha Jeong Kim, Jae Sam Hwang, Yi-Sook Jung, Kun-Koo Park
BACKGROUND: This study aimed to evaluate the anti-aging effect of a newly prepared insect-derived compound, dung beetle glycosaminoglycan (GAG), given intraperitoneally to old SD rats as part of their diet for 1 month. Insect GAG administration was found to be related to a reduction in oxidative damage, hepato-cellular biomarker levels, protein carbonyl content, and malondialdehyde concentration. The anti-aging-related molecular genetic mechanisms of dung beetle GAG are not yet fully elucidated...
2017: Biomaterials Research
https://www.readbyqxmd.com/read/28439296/oxidation-of-a-non-phenolic-lignin-model-compound-by-two-irpex-lacteus-manganese-peroxidases-evidence-for-implication-of-carboxylate-and-radicals
#11
Xing Qin, Xianhua Sun, Huoqing Huang, Yingguo Bai, Yuan Wang, Huiying Luo, Bin Yao, Xiaoyu Zhang, Xiaoyun Su
BACKGROUND: Manganese peroxidase is one of the Class II fungal peroxidases that are able to oxidize the low redox potential phenolic lignin compounds. For high redox potential non-phenolic lignin degradation, mediators such as GSH and unsaturated fatty acids are required in the reaction. However, it is not known whether carboxylic acids are a mediator for non-phenolic lignin degradation. RESULTS: The white rot fungus Irpex lacteus is one of the most potent fungi in degradation of lignocellulose and xenobiotics...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28439258/diabetic-cardiomyopathy-an-immunometabolic-perspective
#12
REVIEW
Paras K Mishra, Wei Ying, Shyam Sundar Nandi, Gautam K Bandyopadhyay, Kaushik K Patel, Sushil K Mahata
The heart possesses a remarkable inherent capability to adapt itself to a wide array of genetic and extrinsic factors to maintain contractile function. Failure to sustain its compensatory responses results in cardiac dysfunction, leading to cardiomyopathy. Diabetic cardiomyopathy (DCM) is characterized by left ventricular hypertrophy and reduced diastolic function, with or without concurrent systolic dysfunction in the absence of hypertension and coronary artery disease. Changes in substrate metabolism, oxidative stress, endoplasmic reticulum stress, formation of extracellular matrix proteins, and advanced glycation end products constitute the early stage in DCM...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28437865/a-novel-role-of-astrocyte-elevated-gene-1-aeg-1-in-regulating-non-alcoholic-steatohepatitis-nash
#13
Jyoti Srivastava, Chadia L Robertson, Kareem Ebeid, Mikhail Dozmorov, Devaraja Rajasekaran, Rachel Mendoza, Ayesha Siddiq, Maaged A Akiel, Nidhi Jariwala, Xue-Ning Shen, Jolene J Windle, Mark A Subler, Nitai D Mukhopadhyay, Shah Giashuddin, Shobha Ghosh, Zhao Lai, Yidong Chen, Paul B Fisher, Aliasger K Salem, Arun J Sanyal, Devanand Sarkar
Nonalcoholic steatohepatitis (NASH) is the most prevalent cause of chronic liver disease in the Western world. However, an optimum therapy for NASH is yet to be established mandating more in-depth investigation into the molecular pathogenesis of NASH to identify novel regulatory molecules and develop targeted therapies. Here, we unravel a unique function of Astrocyte elevated gene-1/Metadherin (AEG-1/MTDH) in NASH using a transgenic mouse with hepatocyte-specific overexpression of AEG-1 (Alb/AEG-1) and a conditional hepatocyte-specific AEG-1 knockout mouse (AEG-1(ΔHEP) )...
April 24, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28437605/aqueously-released-graphene-oxide-embedded-in-epoxy-resin-exhibits-different-characteristics-and-phytotoxicity-of-chlorella-vulgaris-from-the-pristine-form
#14
Xiangang Hu, Weilu Kang, Li Mu
The environmental release of nanoparticles is attracting increasing attention. Graphene oxide (GO) embedded in epoxy resin (ER) is a popular composite that has been used in various fields, but the environmental release of GO-ER composites and the effects on organisms in the environment remain unknown. The present work found that GO-ER composites in water for 2-7 days resulted in the release of 0.3-2.1% GO-ER at nanoscale (2-3 nm thickness and approximately 70-130 nm lateral length). Interestingly, pristine GO quenched 30-45% hydroxyl and 12% nitroxide free radicals, whereas this capacity was not observed for the released particles from GO-ER...
April 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28437190/consuming-a-ketogenic-diet-while-receiving-radiation-and-chemotherapy-for-locally-advanced-lung-cancer-and-pancreatic-cancer-the-university-of-iowa-experience-of-two-phase-1-clinical-trials
#15
Amir Zahra, Melissa A Fath, Emyleigh Opat, Kranti A Mapuskar, Sudershan K Bhatia, Daniel C Ma, Samuel N Rodman Iii, Travis P Snyders, Catherine A Chenard, Julie M Eichenberger-Gilmore, Kellie L Bodeker, Logan Ahmann, Brian J Smith, Sandy A Vollstedt, Heather A Brown, Taher Abu Hejleh, Gerald H Clamon, Daniel J Berg, Luke I Szweda, Douglas R Spitz, John M Buatti, Bryan G Allen
Ketogenic diets are low in carbohydrates and high in fat, which forces cells to rely more heavily upon mitochondrial oxidation of fatty acids for energy. Relative to normal cells, cancer cells are believed to exist under a condition of chronic mitochondrial oxidative stress that is compensated for by increases in glucose metabolism to generate reducing equivalents. In this study we tested the hypothesis that a ketogenic diet concurrent with radiation and chemotherapy would be clinically tolerable in locally advanced non-small cell lung cancer (NSCLC) and pancreatic cancer and could potentially exploit cancer cell oxidative metabolism to improve therapeutic outcomes...
April 24, 2017: Radiation Research
https://www.readbyqxmd.com/read/28436198/effects-of-selenium-on-apoptosis-and-abnormal-amino-acid-metabolism-induced-by-excess-fatty-acid-in-isolated-rat-hepatocytes
#16
Zhigang Zhang, Siyu Li, Huijie Jiang, Biying Liu, Zhanjun Lv, Changming Guo, Haili Zhang
SCOPE: Increased serum free fatty acid (FFA) occurs in subjects with non-alcoholic fatty liver disease (NAFLD) and also triggers oxidative stress, apoptosis, and insulin resistance. Selenium (Se) is an antioxidant agent. However, the effect of Se on NAFLD or diabetes is still unclear. We investigated the effect of Se on apoptosis and abnormal amino acid metabolism initiated by excess FFA in isolated rat hepatocytes. METHODS AND RESULTS: Primary hepatocytes from rats were isolated and exposed to excessive FFA (0...
April 24, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28435771/brown-adipose-tissue-bioenergetics-a-new-methodological-approach
#17
María Calderon-Dominguez, Martín Alcalá, David Sebastián, Antonio Zorzano, Marta Viana, Dolors Serra, Laura Herrero
The rediscovery of brown adipose tissue (BAT) in humans and its capacity to oxidize fat and dissipate energy as heat has put the spotlight on its potential as a therapeutic target in the treatment of several metabolic conditions including obesity and diabetes. To date the measurement of bioenergetics parameters has required the use of cultured cells or extracted mitochondria with the corresponding loss of information in the tissue context. Herein, we present a method to quantify mitochondrial bioenergetics directly in BAT...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435144/effects-of-stanniocalcin-1-on-glucose-flux-in-rat-brown-adipose-tissue
#18
Aline G Cozer, Márcia Trapp, Tiago L Martins, Luciano Stürmer De Fraga, Claudia Vieira Marques, Jorge Felipe A Model, Vanessa Schein, Luiz Carlos Kucharski, Roselis S M Da Silva
The present work assesses in vitro the role of human Stanniocalcin 1 (hSTC-1) in (14)C-glucose metabolism in brown adipose tissue (BAT) from fed rat. In the fed state, hSTC-1 decreases the incorporation of (14)C from glucose into lipids in the rat BAT. The data support the hypothesis that the capacity of the glycerol-3-phosphate (G3P)-generating pathway (glycolysis) from glucose is regulated by hSTC-1, decreasing the adequate supply of G3P needed for fatty acid esterification and triacylglycerol (TG) storage in BAT...
April 20, 2017: Biochimie
https://www.readbyqxmd.com/read/28434889/depletion-of-tm6sf2-disturbs-membrane-lipid-composition-and-dynamics-in-huh7-hepatoma-cells
#19
Hanna Ruhanen, P A Nidhina Haridas, Eeva-Liisa Eskelinen, Ove Eriksson, Vesa M Olkkonen, Reijo Käkelä
A polymorphism of TM6SF2 associates with hepatic lipid accumulation and reduction of triacylglycerol (TAG) secretion, but the function of the encoded protein has remained enigmatic. We studied the effect of stable TM6SF2 knock-down on the lipid content and composition, mitochondrial fatty acid oxidation and organelle structure of HuH7 hepatoma cells. Knock-down of TM6SF2 resulted in intracellular accumulation of TAGs, cholesterol esters, phosphatidylcholine (PC) and phosphatidylethanolamine. In all of these lipid classes, polyunsaturated lipid species were significantly reduced while saturated and monounsaturated species increased their proportions...
April 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28434760/omega-3-fatty-acid-supplementation-is-associated-with-oxidative-stress-and-dyslipidemia-but-does-not-contribute-to-better-lipid-and-oxidative-status-on-hemodialysis-patients
#20
Andresa Marques de Mattos, José Abrão Cardeal da Costa, Alceu Afonso Jordão Júnior, Paula Garcia Chiarello
OBJECTIVE: The aim of the study was to explore the effects of n-3 polyunsaturated fatty acids (PUFA) supplementation in physiological doses on oxidative stress (OS) and dyslipidemia in patients on hemodialysis (HD). DESIGN AND METHODS: Randomized, double-blind, controlled, experimental trial. A total of 88 HD patients ≥18 years old and on HD for at least 6 months. A total of 43 patients received 1.28 g/day of n-3 PUFA, and 45 other patients received soybean oil for 12 weeks...
April 20, 2017: Journal of Renal Nutrition
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