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Essential fatty acids

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https://www.readbyqxmd.com/read/29040452/assessment-of-vegetable-and-fruit-substrates-as-potential-rearing-media-for-hermetia-illucens-diptera-stratiomyidae-larvae
#1
Costanza Jucker, Daniela Erba, Maria Giovanna Leonardi, Daniela Lupi, Sara Savoldelli
Hermetia illucens (L.) (Diptera: Stratiomyidae) is able to consume a wide range of organic matter and is of particular interest for waste management. The nutritional value of preimaginal stages, in particular the protein content, makes this species a valid candidate for use as feed for other organisms. Vegetables and fruits are promising rearing substrates for insects produced for this purpose according to the EU regulation. In order to examine the effects of diets on insect performance and chemical composition, larvae were reared on the following substrates: 1) fruit (apple, pear, and orange); 2) vegetable (lettuce, green beans, and cabbage); and 3) mixed fruits and vegetables...
October 13, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29035283/mtorc1-stimulates-phosphatidylcholine-synthesis-to-promote-triglyceride-secretion
#2
William J Quinn, Min Wan, Swapnil V Shewale, Rebecca Gelfer, Daniel J Rader, Morris J Birnbaum, Paul M Titchenell
Liver triacylglycerol (TAG) synthesis and secretion are closely linked to nutrient availability. After a meal, hepatic TAG formation from fatty acids is decreased, largely due to a reduction in circulating free fatty acids (FFA). Despite the postprandial decrease in FFA-driven esterification and oxidation, VLDL-TAG secretion is maintained to support peripheral lipid delivery and metabolism. The regulatory mechanisms underlying the postprandial control of VLDL-TAG secretion remain unclear. Here, we demonstrated that the mTOR complex 1 (mTORC1) is essential for this sustained VLDL-TAG secretion and lipid homeostasis...
October 16, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29034854/whole-genome-transcriptomics-reveals-global-effects-including-up-regulation-of-francisella-pathogenicity-island-gene-expression-during-active-stringent-response-in-the-highly-virulent-francisella-tularensis-subsp-tularensis-schu-s4
#3
Amber L Murch, Paul J Skipp, Peter L Roach, Petra C F Oyston
During conditions of nutrient limitation bacteria undergo a series of global gene expression changes to survive conditions of amino acid and fatty acid starvation. Rapid reallocation of cellular resources is brought about by gene expression changes coordinated by the signalling nucleotides' guanosine tetraphosphate or pentaphosphate, collectively termed (p)ppGpp and is known as the stringent response. The stringent response has been implicated in bacterial virulence, with elevated (p)ppGpp levels being associated with increased virulence gene expression...
October 16, 2017: Microbiology
https://www.readbyqxmd.com/read/29034175/refining-low-protein-modular-feeds-for-children-on-low-protein-tube-feeds-with-organic-acidaemias
#4
A Daly, S Evans, C Ashmore, S Chahal, S Santra, A MacDonald
Children with inherited metabolic disorders (IMD) who are dependent on tube feeding and require a protein restriction are commonly fed by 'modular tube feeds' consisting of several ingredients. A longitudinal, prospective two-phase study, conducted over 18 months assessed the long-term efficacy of a pre-measured protein-free composite feed. This was specifically designed to meet the non-protein nutritional requirements of children (aged over 1 year) with organic acidaemias on low protein enteral feeds and to be used as a supplement with an enteral feeding protein source...
December 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/29031388/postnatal-rbc-arachidonic-and-docosahexaenoic-acids-deficiencies-are-associated-with-higher-risk-of-neonatal-morbidities-and-mortality-in-preterm-infants
#5
S Fares, M M Sethom, M B Hammami, M Cheour, M Feki, S Hadj-Taieb, S Kacem
Arachidonic (AA) and docosahexaenoic (DHA) acids are essential for the health and development of the neonate. Red blood cell (RBC) fatty acids were analyzed in 583 very low birth weight (VLBW) infants and 274 term infants using capillary gas chromatography. VLBW infants exhibited significantly lower RBC AA (13.0 ± 0.89 vs. 13.5 ± 0.98) and DHA (3.77 ± 0.60 vs. 3.80 ± 0.62), but higher n6:n3 ratio (3.97 ± 0.46 vs. 3.63 ± 0.37) than term infants. In VLBW infants, DHA was lower in those born with small for gestational age (3...
November 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29029205/transcriptome-analysis-of-the-triatoma-infestans-hemiptera-reduviidae-integument
#6
Gustavo M Calderón-Fernández, Débora E Moriconi, Andrea B Dulbecco, M Patricia Juárez
The insect integument, formed by the cuticle and the underlying epidermis, is essential for insect fitness, regulation of lipid biosynthesis and storage, insect growth and feeding, together with development progress. Its participation in insecticide resistance has also been outlined. Triatoma infestans Klug (Hemiptera: Reduviidae) is one of the major vectors of Chagas disease in South America; however, genomic data are scarce. In this study, we performed a transcriptome analysis of the nymph integument in order to identify which genes are expressed and their putative role...
September 27, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29027814/short-chain-fatty-acids-a-link-between-prebiotics-and-microbiota-in-chronic-kidney-disease
#7
Marta Esgalhado, Julie A Kemp, Nagila Rt Damasceno, Denis Fouque, Denise Mafra
Under physiologic conditions, the human gut microbiota performs several activities essential to the body health. In contrast, their imbalances exacerbate some actions which can promote a cascade of metabolic abnormalities, and vice versa. Numerous diseases, including chronic kidney disease, are associated with gut microbiota imbalance, and among several strategies to re-establish gut symbiosis, prebiotics seem to represent an effective nonpharmacological approach. Prebiotics fermentation by gut microbiota produce short-chain fatty acids, which improve the gut barrier integrity and function, and modulate the glucose and lipid metabolism as well as the inflammatory response and immune system...
October 13, 2017: Future Microbiology
https://www.readbyqxmd.com/read/29026976/reductive-evolution-of-chloroplasts-in-non-photosynthetic-plants-algae-and-protists
#8
REVIEW
Lucia Hadariová, Matej Vesteg, Vladimír Hampl, Juraj Krajčovič
Chloroplasts are generally known as eukaryotic organelles whose main function is photosynthesis. They perform other functions, however, such as synthesizing isoprenoids, fatty acids, heme, iron sulphur clusters and other essential compounds. In non-photosynthetic lineages that possess plastids, the chloroplast genomes have been reduced and most (or all) photosynthetic genes have been lost. Consequently, non-photosynthetic plastids have also been reduced structurally. Some of these non-photosynthetic or "cryptic" plastids were overlooked or unrecognized for decades...
October 12, 2017: Current Genetics
https://www.readbyqxmd.com/read/29025976/olea-glu117-is-key-to-condensation-of-two-fatty-acyl-coenzyme-a-substrates-in-long-chain-olefin-biosynthesis
#9
Matthew R Jensen, Brandon R Goblirsch, James K Christenson, Morgan A Esler, Fatuma A Mohamed, Lawrence P Wackett, Carrie M Wilmot
In the interest of decreasing dependence on fossil fuels, microbial hydrocarbon biosynthesis pathways are being studied for renewable, tailored production of specialty chemicals and biofuels. One candidate is long-chain olefin biosynthesis, a widespread bacterial pathway that produces waxy hydrocarbons. Found in three- and four-gene clusters, oleABCD encode the enzymes necessary to produce cis -olefins that differ by alkyl chain length, degree of unsaturation, and alkyl chain branching. The first enzyme in the pathway, OleA, catalyzes the Claisen condensation of two fatty acyl-coenzyme A molecules to form a β-keto acid...
October 12, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29024570/deuterium-reinforced-polyunsaturated-fatty-acids-improve-cognition-in-a-mouse-model-of-sporadic-alzheimer-s-disease
#10
Ahmed Elharram, Nicole M Czegledy, Michael Golod, Ginger L Milne, Erik Pollock, Brian M Bennett, Mikhail S Shchepinov
Oxidative damage resulting from increased lipid peroxidation (LPO) is considered an important factor in the development of late onset/age-related Alzheimer's disease (AD). Deuterium-reinforced polyunsaturated fatty acids (D-PUFAs) are more resistant to the reactive oxygen species-initiated chain reaction of LPO than regular hydrogenated (H-) PUFAs. We investigated the effect of D-PUFA treatment on LPO and cognitive performance in aldehyde dehydrogenase 2 (Aldh2) null mice, an established model of oxidative stress-related cognitive impairment that exhibits AD-like pathologies...
October 12, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29019678/total-synthesis-and-biological-mode-of-action-of-wap-8294a2-a-menaquinone-targeting-antibiotic
#11
Hiroaki Itoh, Kotaro Tokumoto, Takuya Kaji, Atmika Paudel, Suresh Panthee, Hiroshi Hamamoto, Kazuhisa Sekimizu, Masayuki Inoue
WAP-8294A2 (lotilibcin, 1) is a potent antibiotic with superior in vivo efficacy to vancomycin against methicillin-resistant Staphylococcus aureus (MRSA). Despite the great medical importance, its molecular mode of action remains unknown. Here we report the total synthesis of complex macrocyclic peptide 1 comprised of 12 amino acids with a β-hydroxy fatty-acid chain, and its deoxy analogue 2. A full solid-phase synthesis of 1 and 2 enabled their rapid assembly and the first detailed investigation of their functions...
October 11, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29018241/eugenol-inhibits-oxidative-phosphorylation-and-fatty-acid-oxidation-via-downregulation-of-c-myc-pgc-1%C3%AE-err%C3%AE-signaling-pathway-in-mcf10a-ras-cells
#12
Xianxin Yan, Guijuan Zhang, Fengjie Bie, Yanhong Lv, Yi Ma, Min Ma, Yurong Wang, Xiaoqian Hao, Naijun Yuan, Xuefeng Jiang
Alteration in cellular energy metabolism plays a critical role in the development and progression of cancer. Targeting metabolic pathways for cancer treatment has been investigated as potential preventive or therapeutic methods. Eugenol (Eu), a major volatile constituent of clove essential oil mainly obtained from Syzygium, has been reported as a potential chemopreventive drug. However, the mechanism by which Eu regulates cellular energy metabolism is still not well defined. This study was designed to determine the effect of Eu on cellular energy metabolism during early cancer progression employing untransformed and H-ras oncogene transfected MCF10A human breast epithelial cells...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28994730/prlpaat4-a-putative-lysophosphatidic-acid-acyltransferase-from-paeonia-rockii-plays-an-important-role-in-seed-fatty-acid-biosynthesis
#13
Qingyu Zhang, Rui Yu, Daoyang Sun, Zhangzhen Bai, Hong Li, Liang Xue, Yanlong Zhang, Lixin Niu
Lysophosphatidic acid acyltransferases (LPAATs) are essential for the acylation of lysophosphatidic acid (LPA) and the synthesis of phosphatidic acid (PA), a key intermediate in the synthesis of membrane phospholipids and storage lipids. Here, a putative lysophosphatidic acid acyltransferase gene, designated PrLPAAT4, was isolated from seed unsaturated fatty acid (UFA)-rich P. rockii. The complete PrLPAAT4 cDNA contained a 1116-bp open reading frame (ORF), encoding a 42.9 kDa protein with 371 amino acid residues...
October 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28990716/genome-wide-characterization-of-phytophthora-infestans-metabolism-a-systems-biology-approach
#14
Sander Y A Rodenburg, Michael F Seidl, Dick de Ridder, Francine Govers
Genome-scale metabolic models (GEMs) provide a functional view of the complex network of biochemical reactions in the living cell. Initially mainly applied to reconstruct the metabolism of model organisms, the availability of increasingly sophisticated reconstruction methods and more extensive biochemical databases now make it possible to reconstruct GEMs for less characterized organisms as well, and have the potential to unravel the metabolism in pathogen-host systems. Here we present a GEM for the oomycete plant pathogen Phytophthora infestans as a first step towards an integrative model with its host...
October 9, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28989862/bioprospecting-north-atlantic-microalgae-with-fast-growth-and-high-polyunsaturated-fatty-acid-pufa-content-for-microalgae-based-technologies
#15
Pia Steinrücken, Svein Rune Erga, Svein Are Mjøs, Hans Kleivdal, Siv Kristin Prestegard
Microalgae are considered to be an important and sustainable alternative to fish oil as a source for the polyunsaturated fatty acids (PUFAs) eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Due to their health benefits, there is an increasing interest in the commercial application of these fatty acids (FA) to health and dietary products, and to aquaculture feeds. However, FA from microalgae are still expensive to produce compared to fish or plant oils. With only a few microalgal strains being cultivated on a large scale for commercial PUFA production, prospecting for new, robust and fast-growing strains with increased PUFA content is essential in order to reduce production costs...
September 2017: Algal research
https://www.readbyqxmd.com/read/28989244/herbal-drugs-from-sudan-traditional-uses-and-phytoconstituents
#16
REVIEW
Mohamed Gamaleldin Elsadig Karar, Nikolai Kuhnert
Sudan folklore medicine is characterized by a unique combination of Islamic, Arabic, and African cultures. In poor communities, traditional medicine has remained as the most reasonable source of treatment of several diseases and microbial infections. Although the traditional medicine is accepted in Sudan, to date there is no updated review available, which focuses on most effective and frequently used Sudanese medicinal plants. Thus, this review aims to summarize the published information on the ethnobotanical uses of medicinal plants from Sudan, preparation methods, phytochemistry, and ethnopharmacology...
July 2017: Pharmacognosy Reviews
https://www.readbyqxmd.com/read/28986507/a-conserved-mammalian-mitochondrial-isoform-of-acetyl-coa-carboxylase-acc1-provides-the-malonyl-coa-essential-for-mitochondrial-biogenesis-in-tandem-with-acsf3
#17
Geoffray Monteuuis, Fumi Suomi, Juha M Kerätär, Ali J Masud, Alexander J Kastaniotis
Mitochondrial fatty acid synthesis (mtFAS) is a highly conserved pathway essential for mitochondrial biogenesis. The mtFAS process is required for mitochondrial respiratory chain assembly and function, synthesis of the lipoic acid cofactor indispensable for the function of several mitochondrial enzyme complexes and essential for embryonic development in mice. Mutations in human mtFAS have been reported to lead to neurodegenerative disease. The source of malonyl-CoA for mtFAS in mammals has remained unclear...
October 6, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28986357/excess-omega-6-fatty-acids-influx-in-aging-drives-metabolic-dysregulation-electrocardiographic-alterations-and-low-grade-chronic-inflammation
#18
Vasundhara Kain, Kevin A Ingle, Maureen Kachman, Heidi Baum, Gobinath Shanmugam, Namakkal S Rajasekaran, Martin E Young, Ganesh V Halade
Maintaining a balance of omega-6 and -3 fatty acids is essential for cardiac health. Current omega-6 and omega-3 fatty acids in the American diet has shifted from the ideal ratio of 2:1 to almost 20:1, while there is a body of evidence suggest the negative impact of such a shift in younger organisms, the underlying age-related metabolic signaling in response to the excess influx of omega-6 is incompletely understood. In the current study, young (6-month-old) and aging (≥18-month-old) mice were fed for two months with omega-6 enriched diet...
October 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28986132/new-perspectives-in-cancer-modulation-of-lipid-metabolism-and-inflammation-resolution
#19
REVIEW
Nella Prevete, Federica Liotti, Angela Amoresano, Piero Pucci, Amato de Paulis, Rosa Marina Melillo
Inflammation is considered an enabling feature of cancer. Besides the persistence of inflammatory stimuli, also defective mechanisms of resolution can lead to chronic inflammation. Inflammation resolution is an active process controlled by lipidic specialized pro-resolving mediators (SPMs), derived from ω-3 or ω-6 essential polyunsaturated fatty acids (PUFA) through the activity of lipoxygenases (ALOX5 and 15). Thus, a lack or defect in resolution mechanisms may affect cancer development and progression by prolonging inflammation...
October 3, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28985842/increased-population-of-immature-enteric-glial-cells-in-the-resected-proximal-ganglionic-bowel-of-hirschsprung-s-disease-patients
#20
Gakuto Tani, Christian Tomuschat, Anne Marie O'Donnell, David Coyle, Prem Puri
BACKGROUND: Enteric glial cells are essential for normal gastrointestinal function. Abnormalities in glial structure, development, or function lead to disturbances in gastrointestinal physiology. Fatty acid-binding protein 7 (FABP7) is a marker of immature enteric glial cells, whereas S100 is expressed only by mature glial cells. Patients with Hirschsprung's disease (HSCR) often suffer from dysmotility and enterocolitis despite proper surgery. We designed this study to determine the distribution and expression of glial cells in patients with HSCR compared to normal controls...
October 2017: Journal of Surgical Research
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