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Essential fatty acids

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https://www.readbyqxmd.com/read/28815210/lpxk-is-essential-for-growth-of-acinetobacter-baumannii-atcc-19606-relationship-to-toxic-accumulation-of-lipid-a-pathway-intermediates
#1
Jun-Rong Wei, Daryl L Richie, Mina Mostafavi, Louis E Metzger, Christopher M Rath, William S Sawyer, Kenneth T Takeoka, Charles R Dean
Acinetobacter baumannii ATCC 19606 can grow without lipid A, the major component of lipooligosaccharide. However, we previously reported that depletion of LpxH (the fourth enzyme in the lipid A biosynthetic pathway) prevented growth of this strain due to toxic accumulation of lipid A pathway intermediates. Here, we explored whether a similar phenomenon occurred with depletion of LpxK, a kinase that phosphorylates disaccharide 1-monophosphate (DSMP) at the 4' position to yield lipid IVA. An A. baumannii ATCC 19606 derivative with LpxK expression under the control of an isopropyl β-d-1-thiogalactopyranoside (IPTG)-regulated expression system failed to grow without induction, indicating that LpxK is essential for growth...
July 2017: MSphere
https://www.readbyqxmd.com/read/28814830/comparative-analysis-of-essential-oil-composition-of-iranian-and-indian-nigella-sativa-l-extracted-using-supercritical-fluid-extraction-and-solvent-extraction
#2
Kourosh Hasanzadeh Ghahramanloo, Behnam Kamalidehghan, Hamid Akbari Javar, Riyanto Teguh Widodo, Keivan Majidzadeh, Mohamed Ibrahim Noordin
The objective of this study was to compare the oil extraction yield and essential oil composition of Indian and Iranian Nigella sativa L. extracted by using Supercritical Fluid Extraction (SFE) and solvent extraction methods. In this study, a gas chromatography equipped with a mass spectrophotometer detector was employed for qualitative analysis of the essential oil composition of Indian and Iranian N. sativa L. The results indicated that the main fatty acid composition identified in the essential oils extracted by using SFE and solvent extraction were linoleic acid (22...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28813167/lipophagy-maintains-energy-homeostasis-in-the-kidney-proximal-tubule-during-prolonged-starvation
#3
Satoshi Minami, Takeshi Yamamoto, Yoshitsugu Takabatake, Atsushi Takahashi, Tomoko Namba, Jun Matsuda, Tomonori Kimura, Jun-Ya Kaimori, Isao Matsui, Takayuki Hamano, Hiroaki Takeda, Masatomo Takahashi, Yoshihiro Izumi, Takeshi Bamba, Taiji Matsusaka, Fumio Niimura, Yoshitaka Isaka
Macroautophagy/autophagy is a self-degradation process that combats starvation. Lipids are the main energy source in kidney proximal tubular cells (PTCs). During starvation, PTCs increase fatty acid (FA) uptake, form intracellular lipid droplets (LDs), and hydrolyze them for use. The involvement of autophagy in lipid metabolism in the kidney remains largely unknown. Here, we investigated the autophagy-mediated regulation of renal lipid metabolism during prolonged starvation using PTC-specific Atg5-deficient (atg5-TSKO) mice and an in vitro serum starvation model...
August 16, 2017: Autophagy
https://www.readbyqxmd.com/read/28812011/oil-characterization-and-lipids-class-composition-of-pomegranate-seeds
#4
Zahra Amri, Houda Lazreg-Aref, Manel Mekni, Sinda El-Gharbi, Olfa Dabbaghi, Beligh Mechri, Mohamed Hammami
This study aims to investigate the physicochemical characteristics, phenolics content, and oil composition of pomegranate oil seeds (PSO). Quality indices, pigments, phenolics content, and antioxidant activity were determined. PSO was fractioned into polar lipids: glycolipids (GL) and phospholipids (PL). Sterols profile and fatty acids composition of total lipids (TL), GL, and PL were determined by GC/FID. The free acidity, the peroxide value, and the specific extinction coefficients were, respectively, 1.69%, 3...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28810126/combined-virtual-screening-and-substructure-search-for-discovery-of-novel-fabp4-inhibitors
#5
Haiyan Cai, Ting Wang, Zhuo Yang, Zhijian Xu, Guimin Wang, Heyao Wang, Weiliang Zhu, Kaixian Chen
Fatty acid-binding protein 4 (FABP4, AFABP) is a potential drug target for diabetes and atherosclerosis. In this study, a series of novel FABP4 inhibitors were discovered through combining virtual screening and substructure search. Seventeen compounds exhibited FABP4 inhibitory activities with IC50 <10 μM, among which eleven compounds showed high selectivity against FABP3. The best compound 36b displayed an IC50 value of 1.5 μM. Molecular docking and point mutation studies revealed that Gln95, Arg126 and Tyr128 play key roles for these compounds binding with FABP4...
August 15, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28805683/analysis-and-comparison-of-the-antioxidant-component-of-portulaca-oleracea-leaves-obtained-by-different-solid-liquid-extraction-techniques
#6
Monica Gallo, Esterina Conte, Daniele Naviglio
Portulaca oleracea is a wild plant pest of orchards and gardens, but is also an edible vegetable rich in beneficial nutrients. It possesses many antioxidant properties due to the high content of vitamins, minerals, omega-3 essential fatty acids and other healthful compounds; therefore, the intake of purslane and/or its bioactive compounds could help to improve the health and function of the whole human organism. Accordingly, in this work it was analyzed and compared to the extractive capacity of the antioxidant component of purslane leaves obtained by solid-liquid extraction techniques such as: hot-maceration, maceration with ultrasound, rapid solid-liquid dynamic extraction using the Naviglio extractor, and a combination of two techniques (mix extraction)...
August 12, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28802833/new-pro-resolving-n-3-mediators-bridge-resolution-of-infectious-inflammation-to-tissue-regeneration
#7
REVIEW
Charles N Serhan, Nan Chiang, Jesmond Dalli
While protective, the acute inflammatory response when uncontrolled can lead to further tissue damage and chronic inflammation that is now widely recognized to play important roles in many commonly occurring diseases, such as cardiovascular disease, neurodegenerative diseases, metabolic syndrome, and many other diseases of significant public health concern. The ideal response to initial challenges of the host is complete resolution of the acute inflammatory response, which is now recognized to be a biosynthetically active process governed by specialized pro-resolving mediators (SPM)...
August 9, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28802701/acyl-modification-and-binding-of-mitochondrial-acp-to-multiprotein-complexes
#8
Heike Angerer, Stefan Schönborn, Jan Gorka, Ute Bahr, Michael Karas, Ilka Wittig, Juliana Heidler, Jan Hoffmann, Nina Morgner, Volker Zickermann
The mitochondrial acyl carrier protein (ACPM/NDUFAB1) is a central element of the mitochondrial fatty acid synthesis type II machinery. Originally ACPM was detected as a subunit of respiratory complex I but the reason for the association with the large enzyme complex remained elusive. Complex I from the aerobic yeast Yarrowia lipolytica comprises two different ACPMs, ACPM1 and ACPM2. They are anchored to the protein complex by LYR (leucine-tyrosine-arginine) motif containing protein (LYRM) subunits LYRM3 (NDUFB9) and LYRM6 (NDUFA6)...
August 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28802209/commentary-on-current-changes-of-the-soht-2016-consensus-on-alcohol-markers-in-hair-and-further-background-information
#9
Fritz Pragst, Silke Suesse, Alberto Salomone, Marco Vincenti, Vincent Cirimele, Jayne Hazon, Lolita Tsanaclis, Robert Kingston, Frank Sporkert, Markus R Baumgartner
The consensus on alcohol markers in hair was revised for the fourth time by an expert group of the Society of Hair Testing based on current state of research. This revision was adopted by the members of the Society during the business meeting in Brisbane on August 29th 2016. For both markers, ethyl glucuronide (EtG) and fatty acid ethyl esters (FAEEs), two cut-off values for discrimination between teetotalers or occasional low amount consumption and moderate alcohol drinking (low cut-off), and between non-excessive (abstinence up to moderate alcohol intake) and chronic excessive drinking (high cut-off value) were critically examined...
July 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28801668/exercise-leads-to-unfavourable-cardiac-remodelling-and-enhanced-metabolic-homeostasis-in-obese-mice-with-cardiac-and-skeletal-muscle-autophagy-deficiency
#10
Zhen Yan, Ana Kronemberger, Jay Blomme, Jarrod A Call, Hannah M Caster, Renata O Pereira, Henan Zhao, Vitor U de Melo, Rhianna C Laker, Mei Zhang, Vitor A Lira
Autophagy is stimulated by exercise in several tissues; yet the role of skeletal and cardiac muscle-specific autophagy on the benefits of exercise training remains incompletely understood. Here, we determined the metabolic impact of exercise training in obese mice with cardiac and skeletal muscle disruption of the Autophagy related 7 gene (Atg7(h&mKO)). Muscle autophagy deficiency did not affect glucose clearance and exercise capacity in lean adult mice. High-fat diet in sedentary mice led to endoplasmic reticulum stress and aberrant mitochondrial protein expression in autophagy-deficient skeletal and cardiac muscles...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801042/triacylglycerols-tags-in-edible-oils-determination-characterization-quantitation-chemometric-approach-and-evaluation-of-adulterations
#11
REVIEW
Serena Indelicato, David Bongiorno, Rosa Pitonzo, Vita Di Stefano, Valentina Calabrese, Sergio Indelicato, Giuseppe Avellone
Vegetable oils are a dietary source of lipids that constitute an essential component of a healthy diet. The commonly used vegetable oils differ significantly for their triacylglycerol (TAG) profile. TAGs represent the principal components of oils and may contain different fatty acids (FA) esterified with glycerol leading to several positional isomers. To differentiate individual TAGs species in edible oils, advanced analysis systems and innovative methods are therefore required. TAGs can be considered as good fingerprints for quality control and many studies have been performed to develop rapid and low cost analytical methods to determinate the authenticity, origin and eventually evidence frauds or adulterations...
August 2, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28798916/risk-benefit-assessment-of-monomethylmercury-and-omega-3-fatty-acid-intake-for-ringed-seal-consumption-with-particular-emphasis-on-vulnerable-populations-in-the-western-canadian-arctic
#12
Lena Gmelch, Holger Hintelmann, Brendan Hickie, Hermine Kienberger, Gary Stern, Michael Rychlik
Many northern Inuit communities rely on traditional food as major source of nourishment. An essential part of the traditional Arctic diet is marine mammals such as ringed seals or beluga. Being top predators, these animals are often highly contaminated with various toxins. In contrast, some tissues of marine mammals are also characterized by high amounts of n3-PUFAs (omega-3 polyunsaturated fatty acids). Here, we try to balance the risks associated with the consumption of different tissue types of ringed seals in terms of the neurotoxin monomethylmercury (MMHg) with the benefits of consumption due to high n3-PUFA concentrations...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/28797567/docosahexaenoic-acid-induces-glial-cell-line-derived-neurotrophic-factor-release-in-c6-glioma-cells-implications-of-antidepressant-effects-for-docosahexaenoic-acid
#13
Lanqiu Zhang, Zhuoran Zhu, Zhoubin Tan, Hongyan Luo, Xinwu Hu, Yan Li
Dietary deficiency of n-3 polyunsaturated fatty acids (PUFAs) is involved in the pathophysiology and etiology of major depressive disorder. Supplementation with docosahexaenoic acid (DHA) exerts antidepressant-like effect; however, the molecular mechanism of DHA action remains unclear. Here we examined the effects of DHA on the modulation of glial cell line-derived neurotrophic factor (GDNF), which is essential for neural development, plasticity, neurogenesis, and survival. We demonstrated that DHA treatment significantly increased GDNF release in a concentration dependent manner in rat C6 glioma cells (C6 cells) and primary cultured rat astrocytes, which is also associated with increased expression of GDNF mRNA...
August 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28795377/comparison-of-the-fatty-acid-profile-of-spanish-infant-formulas-and-galician-women-breast-milk
#14
Rocío Barreiro, Patricia Regal, Olga López-Racamonde, Alberto Cepeda, Cristina A Fente
The importance of dietary lipids during childhood is evident, as they are necessary for correct growth and development of the newborn. When breastfeeding is not possible, infant formulas are designed to mimic human milk as much as possible to fulfill infant's requirements. However, the composition of these dairy products is relatively constant, while human milk is not a uniform bio-fluid and changes according to the requirements of the baby. In this study, breast milk samples were donated by 24 Spanish mothers in different lactation stages and different infant formulas were purchased in supermarkets and pharmacies...
August 9, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28795322/discarded-seeds-from-red-pepper-capsicum-annum-processing-industry-as-a-sustainable-source-of-high-added-value-compounds-and-edible-oil
#15
Samia Azabou, Fadia Ben Taheur, Mourad Jridi, Mohamed Bouaziz, Moncef Nasri
The chemical composition and the antioxidant properties of Capsicum annum discarded seeds from processing industry with their corresponding extracted oil were investigated. C. annum seeds had high levels of crude proteins (18.30%), crude oil (11.04%), and dietary fibers (60.96%). The lipophilic fraction of C. annum seeds showed higher radical scavenging activity compared to their hydrophilic fraction, while this latter exhibited the highest reducing power. The results of fatty acid composition showed that fatty acids present in C...
August 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28793863/cardiovascular-risk-and-dyslipidemia-among-persons-living-with-hiv-a-review
#16
REVIEW
Paolo Maggi, Antonio Di Biagio, Stefano Rusconi, Stefania Cicalini, Maurizio D'Abbraccio, Gabriella d'Ettorre, Canio Martinelli, Giuseppe Nunnari, Laura Sighinolfi, Vincenzo Spagnuolo, Nicola Squillace
BACKGROUND: Aim of this review is to focus the attention on people living with HIV infection at risk of developing a cardiovascular event. What is or what would be the most suitable antiretroviral therapy? Which statin or fibrate to reduce the risk? How to influence behavior and lifestyles? DISCUSSION: Prevention of cardiovascular disease (CVD) risk remains the first and essential step in a medical intervention on these patients. The lifestyle modification, including smoking cessation, increased physical activity, weight reduction, and the education on healthy dietary practices are the main instruments...
August 9, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28792480/the-role-of-nutritional-aspects-in-food-allergy-prevention-and-management
#17
REVIEW
Alessandra Mazzocchi, Carina Venter, Kate Maslin, Carlo Agostoni
The prevalence of food allergy in childhood appears to be increasing in both developed and transitional countries. The aim of this paper is to review and summarise key findings in the prevention and management of food allergy, focusing on the role of dietary components and nutritional habits in the development and optimal functioning of the immune system. Essential fatty acids, zinc and vitamin D are likely to enhance the anti-inflammatory and antioxidative barrier and promote immunologic tolerance. Additionally, nutritional components such as pre- and probiotics represent a novel research approach in the attempt to induce a tolerogenic immune environment...
August 9, 2017: Nutrients
https://www.readbyqxmd.com/read/28789705/impact-of-intrapartum-antimicrobial-prophylaxis-upon-the-intestinal-microbiota-and-the-prevalence-of-antibiotic-resistance-genes-in-vaginally-delivered-full-term-neonates
#18
Alicja Nogacka, Nuria Salazar, Marta Suárez, Christian Milani, Silvia Arboleya, Gonzalo Solís, Nuria Fernández, Lidia Alaez, Ana M Hernández-Barranco, Clara G de Los Reyes-Gavilán, Marco Ventura, Miguel Gueimonde
BACKGROUND: Disturbances in the early establishment of the intestinal microbiota may produce important implications for the infant's health and for the risk of disease later on. Different perinatal conditions may be affecting the development of the gut microbiota. Some of them, such as delivery mode or feeding habits, have been extensively assessed whereas others remain to be studied, being critical to identify their impact on the microbiota and, if any, to minimize it. Antibiotics are among the drugs most frequently used in early life, the use of intrapartum antimicrobial prophylaxis (IAP), present in over 30% of deliveries, being the most frequent source of exposure...
August 8, 2017: Microbiome
https://www.readbyqxmd.com/read/28782089/the-role-of-lipids-in-corneal-diseases-and-dystrophies-a-systematic-review
#19
REVIEW
Tyler G Rowsey, Dimitrios Karamichos
Corneal diseases are an extensive cause of blindness worldwide and continue to persist as a challenging public health concern. Recently, various lipid-based therapies have been advocated for the modulation of corneal diseases; however, the number of studies is still very limited. Here we focus on developments and challenges on lipid-based therapies for dry eye disease, diabetic neuropathy, and Fuchs' endothelial corneal dystrophy. All three diseases are highly prevalent conditions and involve corneal stress and inflammation...
December 2017: Clinical and Translational Medicine
https://www.readbyqxmd.com/read/28780091/production-performance-and-milk-fatty-acid-profile-in-grazing-dairy-cows-offered-ground-corn-or-liquid-molasses-as-the-sole-supplemental-nonstructural-carbohydrate-source
#20
A F Brito, K J Soder, P Y Chouinard, S F Reis, S Ross, M D Rubano, M D Casler
The objective of this study was to compare the effects of ground corn or liquid molasses fed as the sole supplemental nonstructural carbohydrate (NSC) source on production performance, milk fatty acid (FA) profile, grazing behavior, and N metabolism in grazing dairy cows. A strip-grazing management system was used, with cows offered a new strip of fresh herbage after each milking, resulting in approximately 16 h of access to pasture daily. Animals were fed a diet formulated to yield an 86:14 forage-to-concentrate ratio consisting [dry matter (DM) basis] of 74% mixed grass-legume herbage, 12% mixed-mostly legume baleage, 12% NSC source, and 2% mineral-vitamin premix...
August 2, 2017: Journal of Dairy Science
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