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docosahexaenoic acid

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https://www.readbyqxmd.com/read/28213537/ketoacylsynthase-domains-of-a-pufa-synthase-in-thraustochytrium-can-effectively-function-as-stand-alone-enzymes-in-escherichia-coli
#1
Xi Xie, Dauenpen Meesapyodsuk, Xiao Qiu
Thraustochytrium sp. 26185 accumulates a high level of docosahexaenoic acid (DHA), a nutritionally important ω-3 very long chain unsaturated fatty acid (VLCPUFA) synthesized primarily by polyunsaturated fatty acid (PUFA) synthase, a Type I polyketide synthase-like mega-enzyme. The PUFA synthase in this species comprises three large subunits each with multiple catalytic domains. It was hypothesized that among these domains, ketoacylsynthase (KS) domains might be critical for catalyzing the condensation of specific unsaturated acyl-ACPs with malonyl-ACP, whereby retaining double bonds in an extended acyl chain...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28212859/docosahexaenoic-acid-phospholipid-differentially-modulates-the-conformation-of-g90v-and-n55k-rhodopsin-mutants-associated-with-retinitis-pigmentosa
#2
Xiaoyun Dong, María Guadalupe Herrera-Hernández, Eva Ramon, Pere Garriga
Rhodopsin is the visual photoreceptor of the retinal rod cells that mediates dim light vision and a prototypical member of the G protein-coupled receptor superfamily. The structural stability and functional performance of rhodopsin are modulated by membrane lipids. Docosahexaenoic acid has been shown to interact with native rhodopsin but no direct evidence has been established on the effect of such lipid on the stability and regeneration of rhodopsin mutants associated with retinal diseases. The stability and regeneration of two thermosensitive mutants G90V and N55K, associated with the retinal degenerative disease retinitis pigmentosa, have been analyzed in docosohexaenoic phospholipid (1,2-didocosa-hexaenoyl-sn-glycero-3-phosphocholine; DDHA-PC) liposomes...
February 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28212390/lack-of-effects-of-fish-oil-supplementation-for-12-weeks-on-resting-metabolic-rate-and-substrate-oxidation-in-healthy-young-men-a-randomized-controlled-trial
#3
Sebastian Jannas-Vela, Kaitlin Roke, Stephanie Boville, David M Mutch, Lawrence L Spriet
: Fish oil (FO) has been shown to have beneficial effects in the body via incorporation into the membranes of many tissues. It has been proposed that omega-3 fatty acids in FO may increase whole body resting metabolic rate (RMR) and fatty acid (FA) oxidation in human subjects, but the results to date are equivocal. The purpose of this study was to investigate the effects of a 12 week FO supplementation period on RMR and substrate oxidation, in comparison to an olive oil (OO) control group, in young healthy males (n = 26; 22...
2017: PloS One
https://www.readbyqxmd.com/read/28210506/combined-supplementation-of-choline-and-docosahexaenoic-acid-during-pregnancy-enhances-neurodevelopment-of-fetal-hippocampus
#4
Huban Thomas Rajarethnem, Kumar Megur Ramakrishna Bhat, Malsawmzuali Jc, Siva Kumar Gopalkrishnan, Ramesh Babu Mugundhu Gopalram, Kiranmai Sesappa Rai
Choline is an essential nutrient for humans which plays an important role in structural integrity and signaling functions. Docosahexaenoic acid (DHA) is a polyunsaturated fatty acid, highly enriched in cell membranes of the brain. Dietary intake of choline or DHA alone by pregnant mothers directly affects fetal brain development and function. But no studies show the efficacy of combined supplementation of choline and DHA on fetal neurodevelopment. The aim of the present study was to analyze fetal neurodevelopment on combined supplementation of pregnant dams with choline and DHA...
2017: Neurology Research International
https://www.readbyqxmd.com/read/28208746/evidence-of-a-dha-signature-in-the-lipidome-and-metabolome-of-human-hepatocytes
#5
Veronica Ghini, Mattia Di Nunzio, Leonardo Tenori, Veronica Valli, Francesca Danesi, Francesco Capozzi, Claudio Luchinat, Alessandra Bordoni
Cell supplementation with bioactive molecules often causes a perturbation in the whole intracellular environment. Omics techniques can be applied for the assessment of this perturbation. In this study, the overall effect of docosahexaenoic acid (DHA) supplementation on cultured human hepatocyte lipidome and metabolome has been investigated using nuclear magnetic resonance (NMR) in combination with traditional techniques. The effect of two additional bioactives sharing with DHA the lipid-lowering effect-propionic acid (PRO) and protocatechuic acid (PCA)-has also been evaluated in the context of possible synergism...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28202633/regional-changes-in-cns-and-retinal-glycerophospholipid-profiles-with-age-a-molecular-blueprint
#6
Blake R Hopiavuori, Martin-Paul Agbaga, Richard S Brush, Michael T Sullivan, William E Sonntag, Robert E Anderson
We present herein a quantitative molecular blueprint of the three major glycerophospholipid (GPL) classes phosphatidylcholine (PC), phosphatidylserine (PS), and phosphatidylethanolamine (PE) in retina and six regions of the brain in C57Bl6 mice at 2, 10, and 26 months of age. We found an age-related increase in molecular species containing saturated and monoenoic fatty acids and an overall decrease in the longer chain polyunsaturated fatty acid (PUFA) molecular species across brain regions, with loss of docosahexaenoic acid (DHA)-containing molecular species as the most consistent and dramatic finding...
February 15, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28202240/fatty-acid-profile-of-the-sea-snail-gibbula-umbilicalis-as-a-biomarker-for-coastal-metal-pollution
#7
Carla O Silva, Tiago Simões, Sara C Novais, Inês Pimparel, Luana Granada, Amadeu M V M Soares, Carlos Barata, Marco F L Lemos
Metals are among the most common environmental pollutants with natural or anthropogenic origin that can be easily transferred through the food chain. Marine gastropods are known to accumulate high concentrations of these metals in their tissues. Gibbula umbilicalis ecological importance and abundant soft tissues, which enables extent biochemical assessments, makes this particular organism a potentially suitable species for marine ecotoxicological studies. Fatty acids are carbon-rich compounds that are ubiquitous in all organisms and easy to metabolize...
February 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28197856/determination-of-substrate-preferences-for-desaturases-and-elongases-for-production-of-docosahexaenoic-acid-from-oleic-acid-in-engineered-canola
#8
Jenny Lindberg Yilmaz, Ze Long Lim, Mirela Beganovic, Steven Breazeale, Carl Andre, Sten Stymne, Patricia Vrinten, Toralf Senger
Production of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in plant seed oils has been pursued to improve availability of these omega-3 fatty acids that provide important human health benefits. Canola (Brassica napus), through the introduction of 10 enzymes, can convert oleic acid (OLA) into EPA and ultimately DHA through a pathway consisting of two elongation and five desaturation steps. Herein we present an assessment of the substrate specificity of the seven desaturases and three elongases that were introduced into canola by expressing individual proteins in yeast...
February 14, 2017: Lipids
https://www.readbyqxmd.com/read/28195518/low-salivary-resolvin-d1-to-leukotriene-b4-ratio-predicts-carotid-intima-media-thickness-a-novel-biomarker-of-non-resolving-vascular-inflammation
#9
Silke Thul, Carlos Labat, Mohamed Temmar, Athanase Benetos, Magnus Bäck
Background Different lipid mediators may have opposing effects on vascular inflammation. For example, whereas leukotriene B4 (LTB4) transduces inflammation, resolvin D1 (RvD1), which is synthesized from the omega-3 fatty acid docosahexaenoic acid, facilitates the resolution of inflammation. The aim of this study was to determine the association of the RvD1/LTB4 ratio with subclinical atherosclerosis. Methods Saliva samples and ultrasound measurements of the intima media thickness of the carotid artery was obtained for 254 participants...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28195161/gas-chromatography-mass-spectrometry-analysis-of-effects-of-dietary-fish-oil-on-total-fatty-acid-composition-in-mouse-skin
#10
Peiru Wang, Min Sun, Jianwei Ren, Zora Djuric, Gary J Fisher, Xiuli Wang, Yong Li
Altering the fatty acid (FA) composition in the skin by dietary fish oil could provide therapeutic benefits. Although it has been shown that fish oil supplementation enhances EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) abundance in the skin, comprehensive skin FA profiling is needed. We established a gas chromatography-mass spectrometry method, which allows precise quantification of FA profile using small (<24 mm(2) for mice and <12 mm(2) for humans) skin specimens that can be readily obtained from live mice and humans...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194272/fatty-acid-content-in-epididymal-fluid-and-spermatozoa-during-sperm-maturation-in-dogs
#11
Daniel S Ramos Angrimani, Marcilio Nichi, João Diego A Losano, Cristina F Lucio, Gisele A Lima Veiga, Márcia V M Junqueira Franco, Camila I Vannucchi
BACKGROUND: During sperm maturation, there is a reorganization of fatty acids from plasmatic membrane of the spermatozoa, which allows higher membrane integrity and acquisition of sperm motility. However, the fatty acid profile during sperm maturation remains unclear in dogs. Thus, the aim of this study was to identify the fatty acids from the epididymal spermatozoa and plasma during the sperm maturation, and observed changes in the motility and plasmatic membrane parameters. Twenty one adult dogs were used, subsequently to bilateral orchiectomy and epididymal storage, sperm samples were collected from the different segments of the epididymis...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28193189/assessment-of-dha-on-reducing-early-preterm-birth-the-adore-randomized-controlled-trial-protocol
#12
Susan E Carlson, Byron J Gajewski, Christina J Valentine, Lynette K Rogers, Carl P Weiner, Emily A DeFranco, Catalin S Buhimschi
BACKGROUND: Preterm birth contributes to 0.5 million deliveries in the United States (one of eight pregnancies) and poses a huge burden on public health with costs in the billions. Of particular concern is that the rate of earliest preterm birth (<34 weeks) (ePTB), which has decreased little since 1990 and has the greatest impact on the overall infant mortality, resulting in the greatest cost to society. Docosahexaenoic acid (DHA) supplementation provides a potential high yield, low risk strategy to reduce early preterm delivery in the US by up to 75%...
February 13, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28192538/pattern-of-omega-3-polyunsaturated-fatty-acid-intake-and-fish-consumption-and-retinal-vascular-caliber-in-children-and-adolescents-a-cohort-study
#13
Bamini Gopinath, Hanieh Moshtaghian, Victoria M Flood, Jimmy C Y Louie, Gerald Liew, George Burlutsky, Paul Mitchell
We aimed to investigate whether fish and long chain omega-3 polyunsaturated fatty acid (LCn-3 PUFA) consumption changed appreciably during adolescence. We also assessed whether these dietary variables are associated with retinal microvascular signs (possible markers of future cardiovascular disease risk). 633 children had dietary data at ages 12 and 17. Fish and LCn-3 PUFA [eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA)] intake was assessed by a food frequency questionnaire...
2017: PloS One
https://www.readbyqxmd.com/read/28191333/effects-of-fish-oil-supplementation-on-gestational-diabetes-mellitus-gdm-a-systematic-review
#14
REVIEW
Alireza Ostadrahimi, Sakineh Mohammad-Alizadeh, Mozhgan Mirgafourvand, Sina Yaghoubi, Elham Shahrisa, Azizeh Farshbaf-Khalili
CONTEXT: One of the most common complications of pregnancy is gestational diabetes mellitus (GDM), which is increasing worldwide. Experimental and epidemiological studies have shown that higher intake of n-3 long-chain polyunsaturated fatty acids may decrease the risk of various diseases such as diabetes. The objective of this study was to assess the effect of fish oil supplementation on the prevention and treatment of GDM. EVIDENCE ACQUISITION: This systematic review was performed by searching several databases, including PubMed, Scopus, Google Scholar, the Cochrane Library, ProQuest, Science Direct SID, Magiran and IranMedex since 1983...
November 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28189115/n-3-polyunsaturated-fatty-acids-alleviate-high-glucose-mediated-dysfunction-of-endothelial-progenitor-cells-and-prevent-ischemic-injuries-both-in-vitro-and-in-vivo
#15
Shao-Chih Chiu, Che-Yi Chao, En-Pei Isabel Chiang, Jia-Ning Syu, Raymond L Rodriguez, Feng-Yao Tang
Hyperglycemia is associated with a reduced number of endothelial progenitor cells (EPCs) that impairs vascular function. Circulating EPCs play important roles in postnatal neovasculogenesis and the prevention of ischemic injury. Frequent consumption of fish oil (FO) that is abundant with eicosapentaenoic acid (EPA)/docosahexaenoic acid (DHA) is reportedly associated with an alleviation of diabetic complications and a lowered incidence of cardiovascular disease. The aim of this study was to examine whether N-3 polyunsaturated fatty acids such as EPA and DHA would reverse the high glucose-mediated dysfunction of EPCs in vitro and thereby prevent the ischemic injury that occurs under the hyperglycemic conditions in Type 2 diabetes (T2D) db(-/-) mice...
January 28, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28189073/lower-levels-of-persistent-organic-pollutants-metals-and-the-marine-omega-3-fatty-acid-dha-in-farmed-compared-to-wild-atlantic-salmon-salmo-salar
#16
Anne-Katrine Lundebye, Erik-Jan Lock, Josef D Rasinger, Ole Jakob Nøstbakken, Rita Hannisdal, Egil Karlsbakk, Vidar Wennevik, Abdullah S Madhun, Lise Madsen, Ingvild Eide Graff, Robin Ørnsrud
Contaminants and fatty acid levels in farmed- versus wild Atlantic salmon have been a hot topic of debate in terms of food safety. The present study determined dioxins (polychlorinated dibenzo-p-dioxin and dibenzofuran), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), organochlorine pesticides (OCPs), metals and fatty acids in wild and farmed Atlantic salmon. Contaminant levels of dioxins, PCBs, OCPs (DDT, dieldrin, lindane, chlordane, Mirex, and toxaphene), and mercury were higher in wild salmon than in farmed salmon, as were the concentrations of the essential elements selenium, copper, zinc and iron, and the marine omega-3 fatty acid docosahexaenoic acid (DHA)...
February 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28186827/exploration-of-the-perceived-and-actual-benefits-of-omega-3-fatty-acids-and-the-impact-of-fads1-and-fads2-genetic-information-on-dietary-intake-and-blood-levels-of-epa-and-dha
#17
Kaitlin Roke
From a global health perspective, increased intake of omega-3 fatty acids (FAs), in particular eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are beneficial for human health. However, the consumption of EPA- and DHA-rich foods such as fatty fish is low in the Western diet. Therefore, finding new ways to motivate people to increase their consumption of omega-3 FAs is essential. To find effective ways to motivate individuals, understanding people's awareness of omega-3 FAs and how they obtain their knowledge about nutrition and health is critical...
February 10, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28181190/distribution-of-alox15-in-the-rat-brain-and-its-role-in-prefrontal-cortical-resolvin-d1-formation-and-spatial-working-memory
#18
Suku-Maran Shalini, Christabel Fung-Yih Ho, Yee-Kong Ng, Jie-Xin Tong, Eng-Shi Ong, Deron R Herr, Gavin S Dawe, Wei-Yi Ong
Docosahexaenoic acid (DHA) is enriched in membrane phospholipids of the central nervous system (CNS) and has a role in aging and neuropsychiatric disorders. DHA is metabolized by the enzyme Alox15 to 17S-hydroxy-DHA, which is then converted to 7S-hydroperoxy,17S-hydroxy-DHA by a 5-lipoxygenase, and thence via epoxy intermediates to the anti-inflammatory molecule, resolvin D1 (RvD1 or 7S,8R,17S-trihydroxy-docosa-Z,9E,11E,13Z,15E,19Z-hexaenoic acid). In this study, we investigated the distribution and function of Alox15 in the CNS...
February 8, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28179495/a-new-immunomodulatory-role-for-peroxisomes-in-macrophages-activated-by-the-tlr4-ligand-lipopolysaccharide
#19
Vijith Vijayan, Tumpara Srinu, Srikanth Karnati, Vannuruswamy Garikapati, Monika Linke, Lilit Kamalyan, Srihari Reddy Mali, Kritika Sudan, Andreas Kollas, Tobias Schmid, Sabine Schulz, Bernhard Spengler, Thomas Weichhart, Stephan Immenschuh, Eveline Baumgart-Vogt
Peroxisomes are proposed to play an important role in the regulation of systemic inflammation; however, the functional role of these organelles in inflammatory responses of myeloid immune cells is largely unknown. In this article, we demonstrate that the nonclassical peroxisome proliferator 4-phenyl butyric acid is an efficient inducer of peroxisomes in various models of murine macrophages, such as primary alveolar and peritoneal macrophages and the macrophage cell line RAW264.7, but not in primary bone marrow-derived macrophages...
February 8, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28177707/dietary-fish-oil-delays-hypoxic-skeletal-muscle-fatigue-and-enhances-caffeine-stimulated-contractile-recovery-in-the-rat-in-vivo-hindlimb
#20
Gregory E Peoples, Peter L McLennan
Oxygen efficiency influences skeletal muscle contractile function during physiological hypoxia. Dietary fish oil, providing docosahexaenoic acid (DHA), reduces the oxygen cost of muscle contraction. This study used autologous perfused rat hindlimb model to examine the effects of a fish oil diet on skeletal muscle fatigue during an acute hypoxic challenge. Male Wistar rats were fed a diet rich in saturated fat (SF), long chain (LC) n-6 polyunsaturated fatty acids (n-6 PUFA), or LC n-3 PUFA DHA from fish oil (FO) (8weeks)...
January 26, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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