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Prostaglandins, Leukotrienes, and Essential Fatty Acids

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https://www.readbyqxmd.com/read/28408067/polyphenol-supplementation-inhibits-physiological-increase-of-prostaglandin-e2-during-reproductive-period-a-randomized-clinical-trial
#1
A M Zilio, P Zielinsky, I Vian, K Lampert, D Raupp, C Weschenfelder, C Brum, A Arnt, A Piccoli, L H Nicoloso, M I Schaun, M Markoski
Anti-inflammatory property of polyphenols and their effect on the metabolism of prostaglandins is not established in healthy humans. This study aimed to evaluate the effect of polyphenol supplementation in plasma levels of prostaglandin E2 and other markers of inflammation and oxidative stress in women using contraceptives. In this randomized double-blind clinical trial, women aged 25-35 years were selected. Participants received capsules containing polyphenols or placebo, to be consumed for fifteen days. From 40 women randomized, 28 completed the study...
April 5, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28314621/docosahexaenoic-acid-dha-an-essential-nutrient-and-a-nutraceutical-for-brain-health-and-diseases
#2
REVIEW
Grace Y Sun, Agnes Simonyi, Kevin L Fritsche, Dennis Y Chuang, Mark Hannink, Zezong Gu, C Michael Greenlief, Jeffrey K Yao, James C Lee, David Q Beversdorf
Docosahexaenoic acid (DHA), a polyunsaturated fatty acid (PUFA) enriched in phospholipids in the brain and retina, is known to play multi-functional roles in brain health and diseases. While arachidonic acid (AA) is released from membrane phospholipids by cytosolic phospholipase A2 (cPLA2), DHA is linked to action of the Ca(2+)-independent iPLA2. DHA undergoes enzymatic conversion by 15-lipoxygenase (Alox 15) to form oxylipins including resolvins and neuroprotectins, which are powerful lipid mediators. DHA can also undergo non-enzymatic conversion by reacting with oxygen free radicals (ROS), which cause the production of 4-hydoxyhexenal (4-HHE), an aldehyde derivative which can form adducts with DNA, proteins and lipids...
March 10, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28292553/low-dietary-n-6-n-3-polyunsaturated-fatty-acid-ratio-prevents-induced-oral-carcinoma-in-a-hamster-pouch-model
#3
Hsiu-Chuan Lee, An Liang, Yun-Ho Lin, Yu-Ru Guo, Shih-Yi Huang
Dietary fatty acid patterns have been linked to the prevalence of certain cancers, however in oral carcinoma is limited. Thus, we investigated the chemopreventive effects of various dietary n-6 and n-3 fatty acids in a 9,10-dimethyl-1,2-benz[a]-anthracene (DMBA)- and betel quid extract (BQE) -induced hamster oral cancer model. Thirty 6-week-old adult male hamsters were housed and divided into normal, low, and high dietary n-6 and n-3 fatty acid groups under DMBA + BQE treatment for 16 weeks. The right buccal pouch of all hamsters were evaluated by tumor number, volume, burden and selected inflammatory parameters...
March 9, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28390839/validation-of-an-equation-predicting-highly-unsaturated-fatty-acid-hufa-compositions-of-human-blood-fractions-from-dietary-intakes-of-both-hufas-and-their-precursors
#4
Sarah E Strandjord, Bill Lands, Joseph R Hibbeln
Proportions of omega-3 (n-3) and omega-6 (n-6) in 20- and 22-carbon highly unsaturated fatty acids with 3 or more double bonds (HUFA) accumulated in tissue HUFA (e.g., the %n-6 in HUFA) are biomarkers reflecting intakes of n-6 and n-3 fatty acids. An empirical equation, referred to here as the Lands' Equation, was developed previously to use dietary intakes of n-6 and n-3 HUFA and their 18-carbon precursors to estimate the %n-6 in HUFA of humans. From the PubMed database, we identified clinical trials reporting (a) dietary intake of at least linoleic acid (18:2n-6) and alpha-linolenic acid (18:3n-3), and (b) the amounts of at least arachidonic acid (20:4n-6), eicosapentaenoic acid (20:5n-3), and docosahexaenoic acid (22:6n-3) in lipids of plasma, serum, or red blood cell...
March 8, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28410669/curcumin-and-linseed-oil-co-delivered-in-phospholipid-nanoemulsions-enhances-the-levels-of-docosahexaenoic-acid-in-serum-and-tissue-lipids-of-rats
#5
D Sugasini, B R Lokesh
Docosahexaenoic acid (DHA) is an important long chain omega-3 polyunsaturated fatty acid (PUFA) primarily found in marine fishes. The diets of vegetarian population do not contain preformed DHA, but they can derive it from shorter chain α-linolenic acid (ALA) found in plant oils. However, the conversion efficiency of ALA to DHA is minimal in human adults. This may cause insufficiency of DHA in the vegetarian population. Curcumin, diferuloyl methane found in the spice turmeric, has the potential to increase the formation of DHA from ALA by activating the enzymes FADS2 and elongase 2...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28410668/lipid-correlates-of-antidepressant-response-to-omega-3-polyunsaturated-fatty-acid-supplementation-a-pilot-study
#6
Licinia Ganança, Hanga C Galfalvy, Maria A Oquendo, Adrienne Hezghia, Thomas B Cooper, J John Mann, M Elizabeth Sublette
Low omega-3 polyunsaturated fatty acid (PUFA) levels are seen in major depression. We examined effects of six weeks of fish oil supplementation on clinical characteristics in 16 patients with symptomatic major depressive disorder, and tested plasma phospholipid levels of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) as correlates of clinical response. Depression symptoms improved after supplementation (p=0.007). The reduction in depression severity was not predicted by baseline PUFA levels but did exhibit a relationship with endpoint PUFAs, correlating negatively with DHA as a percentage of plasma phospholipids (DHA%; R(2)=0...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28410667/comparative-effects-of-high-oleic-acid-vs-high-mixed-saturated-fatty-acid-obesogenic-diets-upon-pufa-metabolism-in-mice
#7
Matthew J Picklo, Joseph Idso, Drew R Seeger, Harold M Aukema, Eric J Murphy
Emerging evidence indicates that the fatty acid composition of obesogenic diets influences physiologic outcomes. There are scant data regarding how the content of non-essential fatty acids like monounsaturated fatty acids (MUFA) and saturated fatty acids (SFAs) impact the metabolism of polyunsaturated fatty acids (PUFAs). In this work, we tested the hypothesis that obesogenic diets enriched in oleic acid (OA; 18:1n-9) reduce polyunsaturated fatty acid (PUFA) levels vs an obesogenic diet enriched in SFAs. Adult male mice were fed for eight weeks either (1) a control 16% fat energy (en) diet with 5...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28410666/a-new-cyslt1-and-cyslt2-receptors-mediated-anaphylaxis-guinea-pig-model
#8
Tomohiko Sekioka, Michiaki Kadode, Noriko Osakada, Manabu Fujita, Naoya Matsumura, Yoshiyuki Yamaura, Shinji Nakade, Takeshi Nabe, Kazuhito Kawabata
Although the effectiveness of CysLT1 receptor antagonists on asthma has been clinically established, the effects of CysLT2 receptor antagonists are still unclear. The purpose of this study was to develop a new CysLT1 and CysLT2 receptors-mediated anaphylaxis guinea pig model using S-hexyl GSH, a γ-glutamyl transpeptidase (GTP) inhibitor, to suppress conversion of LTC4 to LTD4. Actively sensitized guinea pigs were challenged with OVA in the absence or presence of S-hexyl GSH, and survival rate following anaphylactic response was monitored...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28410665/impact-of-dietary-precursor-ala-versus-preformed-dha-on-fatty-acid-profiles-of-eggs-liver-and-adipose-tissue-and-expression-of-genes-associated-with-hepatic-lipid-metabolism-in-laying-hens
#9
M Neijat, P Eck, J D House
Dietary omega-3 polyunsaturated fatty acids (n-3 PUFA), including alpha-linolenic acid (ALA) and preformed longer chain PUFA (LCPUFA, particularly docosahexaenoic acid, DHA) differ in their egg LCPUFA enrichment efficiency. However, mechanisms leading to these differences are unclear. To this end, omega-3 PUFA contents in different lipid classes, including triacylglycerol (TAG) and total phospholipid (PL) in yolk, liver and adipose, as well as the expression of key hepatic enzymes in lipid metabolism were evaluated in laying hens in response to changes in dietary supply...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28288702/the-oil-rich-alga-schizochytrium-sp-as-a-dietary-source-of-docosahexaenoic-acid-improves-shape-discrimination-learning-associated-with-visual-processing-in-a-canine-model-of-senescence
#10
K B Hadley, J Bauer, N W Milgram
Whole cell Schizochytrium sp. is a rich source of omega-3 long-chain polyunsaturated fatty acids (n-3 LCPUFA) including docosahexaenoic acid (DHA), an important nutrient for brain health. Aged beagle dogs experienced on a visuospatial task of working memory, variable-delay delayed-non-matching-to-position were used to assess efficacy of DHA-rich microalgae based upon DHA wt% of total phospholipids and 8-iso-PGF2α concentrations in plasma, and performance on cognitive assessments of visual object discrimination, learning, and memory consolidation after 25 weeks on fortified diet...
March 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28288701/abdominal-aortic-aneurysm-and-omega-3-polyunsaturated-fatty-acids-mechanisms-animal-models-and-potential-treatment
#11
REVIEW
Lara T Meital, Shaun L Sandow, Philip C Calder, Fraser D Russell
Abdominal aortic aneurysm (AAA) is an inflammatory disease associated with macrophage accumulation in the adventitia, oxidative stress, medial elastin degradation and aortic dilation. Progression of AAA is linked to increased risk of rupture, which carries a high mortality rate. Drug therapies trialled to date lack efficacy and although aneurysm repair is available for patients with large aneurysm, peri-surgical morbidity and mortality have been widely reported. Recent studies using rodent models of AAA suggest that long chain omega-3 polyunsaturated fatty acids (LC n-3 PUFAs) and their metabolites can moderate inflammation and oxidative stress perpetuated by infiltrating macrophages and intervene in the destruction of medial elastin...
March 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237088/low-long-chain-omega-3-fatty-acid-status-in-middle-aged-women
#12
Sandra Gellert, Jan Philipp Schuchardt, Andreas Hahn
INTRODUCTION: Long-chain (LC) omega-3 fatty acids (n-3 PUFAs) have beneficial effects on cardiovascular health and cognitive decline. Several studies have shown that the LC n-3 PUFA status in women in western countries is low. The aim of this study was to assess the LC n-3 PUFA status in middle-aged German women and to identify variables that might affect the status. MATERIAL AND METHODS: From the nationwide and cross-sectional German VitaMinFemin study, fatty acid levels in the erythrocyte membrane (% of total erythrocyte fatty acids) were ascertained for 446 women (40-60 years)...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237087/e-configuration-structures-of-epa-and-dha-derived-from-euphausia-superba-and-their-significant-inhibitive-effects-on-growth-of-human-cancer-cell-lines-in-vitro
#13
Weilong Zheng, Xudong Wang, Wenjing Cao, Bowen Yang, Ying Mu, Yuesheng Dong, Zhilong Xiu
Many bioactive components such as poly-unsaturated fatty acids (e.g. EPA and DHA), phospholipids and astaxanthin are known in Antarctic krill (Euphausia superba) oil. The krill DHA and EPA are generally considered to be similar to natural ones. However, two chemical compounds which were separated from Antarctic krill oil and identified as EPA and DHA by HRESIMS and NMR acted much more effective inhibitive activities on growth of several cell lines (U937, K562, SMMC-7721, PC-3, MDA-MB-231, HL60 and MCF-7) than those from sturgeon liver and commercial fish oil...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237086/pseudomonas-aeruginosa-produces-aspirin-insensitive-eicosanoids-and-contributes-to-the-eicosanoid-profile-of-polymicrobial-biofilms-with-candida-albicans
#14
Ruan Fourie, Ruan Ells, Gabré Kemp, Olihile M Sebolai, Jacobus Albertyn, Carolina H Pohl
The interaction of clinically relevant microorganisms is the focus of various studies, e.g. the interaction between the pathogenic yeast, Candida albicans, and the bacterium, Pseudomonas aeruginosa. During infection both release arachidonic acid, which they can transform into eicosanoids. This study evaluated the production of prostaglandin E2, prostaglandin F2α and 15-hydroxyeicosatetraenoic acid by biofilms of P. aeruginosa and C. albicans. The influence of co-incubation, acetylsalicylic acid and nordihydroguaiaretic acid on biofilm formation and eicosanoid production was evaluated...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237085/effects-of-a-lipid-based-nutrient-supplement-during-pregnancy-and-lactation-on-maternal-plasma-fatty-acid-status-and-lipid-profile-results-of-two-randomized-controlled-trials
#15
Brietta M Oaks, Rebecca R Young, Seth Adu-Afarwuah, Ulla Ashorn, Kristina H Jackson, Anna Lartey, Kenneth Maleta, Harriet Okronipa, John Sadalaki, Lacey M Baldiviez, Setti Shahab-Ferdows, Per Ashorn, Kathryn G Dewey
It is unknown whether a novel small-quantity lipid-based nutrient supplement (SQ-LNS) containing alpha-linolenic (ALA) and linoleic acids impacts maternal plasma lipids and fatty acid status. We measured plasma fatty acids (wt%) and lipid concentrations at 36 wk gestation and breast milk fatty acids (wt%) at 6 months postpartum in a subsample of women enrolled in a randomized controlled trial studying the effects of SQ-LNS on birth outcomes and child growth. Women≤20 wk gestation in Ghana (n=1,320) and Malawi (n=1,391) were assigned to receive daily either: 1) iron-folic acid (pregnancy); 2) multiple micronutrients (pregnancy and lactation); or 3) SQ-LNS (pregnancy and lactation)...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237084/identification-and-profiling-of-specialized-pro-resolving-mediators-in-human-tears-by-lipid-mediator-metabolomics
#16
Justin T English, Paul C Norris, Robin R Hodges, Darlene A Dartt, Charles N Serhan
Specialized pro-resolving mediators (SPM), e.g. Resolvin D1, Protectin D1, Lipoxin A₄, and Resolvin E1 have each shown to be active in ocular models reducing inflammation. In general, SPMs have specific agonist functions that stimulate resolution of infection and inflammation in animal disease models. The presence and quantity of SPM in human emotional tears is of interest. Here, utilizing a targeted LC-MS-MS metabololipidomics based approach we document the identification of pro-inflammatory (Prostaglandins and Leukotriene B₄) and pro-resolving lipid mediators (D-series Resolvins, Protectin D1, and Lipoxin A₄) in human emotional tears from 12 healthy individuals...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237083/association-of-the-fads-gene-cluster-with-coronary-artery-disease-and-plasma-lipid-concentrations-in-the-northern-chinese-han-population
#17
Yixia Wu, Lixin Zeng, Xueyan Chen, Yang Xu, Lin Ye, Ling Qin, Liping Chen, Lin Xie
We investigated the association of single nucleotide polymorphisms (SNPs) in the fatty acid desaturase (FADS) gene cluster with coronary artery disease (CAD) in a case-control study and evaluated the possible influence of genetic variation on total cholesterol (TC) and triglyceride concentrations in the controls. In total, 497 CAD patients and 495 unrelated controls were genotyped for eight SNPs in the FADS gene cluster, and the blood lipid levels of subjects were measured. Three genetic models, including codominant, dominant and recessive, were used to analyze the genotypic relationship with CAD and plasma lipid levels...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28237082/effects-of-arachidonic-acid-on-ffa4-receptor-signaling-phosphorylation-and-internalization
#18
S Villegas-Comonfort, Y Takei, G Tsujimoto, A Hirasawa, J A García-Sáinz
Arachidonic acid increased intracellular calcium, in cells expressing green fluorescent protein-tagged human FFA4 receptors, with an EC50 of ~40µM. This action was not blocked by cyclooxygenase or lipoxigenase inhibitors but it was inhibited by AH7614, a FFA4 antagonist. Arachidonic acid induced ERK activation accompanied by EGF receptor transactivation. However, EGF transactivation was not the major mechanism through which the fatty acid induced ERK phosphorylation, as evidenced by the inability of AG1478 to block it...
February 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28189338/dynamic-interactions-of-n-3-and-n-6-fatty-acid-nutrients
#19
B Lands, D Bibus, K D Stark
Careful handling of data on fatty acid composition is needed when interpreting evidence for the influence of dietary n-3 and n-6 essential fatty acids on brain function and health conditions. The relative dietary supplies of competing n-3 and n-6 nutrients determine the balance of 20- and 22-carbon n-3 and n-6 highly unsaturated fatty acids (HUFA) which accumulate competitively at the 2-position of tissue phospholipids. In turn, the HUFA balance expressed as the %n-6 in HUFA affects the likely intensity of n-6 eicosanoid actions in diverse health conditions...
January 25, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28161285/genetic-polymorphisms-of-fads1-fads2-and-fads3-and-fatty-acid-profiles-in-subjects-received-methadone-maintenance-therapy
#20
Hui-Ting Yang, Ruey-Yun Wang, Shih-Yi Huang, Chieh-Liang Huang, Kuan-Pin Su
Abnormal fatty acid metabolism and the related enzymes had been observed to be associated with psychiatric disorders. We investigated FADS gene family genetic polymorphisms and variations of lipid profiles in patients with heroin dependence receiving 6-month methadone maintenance therapy (MMT). We recruited 89 MMT drug abusers and analyzed 3 tag single nucleotide polymorphisms (SNPs) from Fatty acid desaturases (FADS), FADS1, FADS2 and FADS3. The fatty acid profiles of erythrocyte membranes were analyzed based on genetic variations...
January 25, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
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