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https://www.readbyqxmd.com/read/28335553/biosynthesis-of-polyunsaturated-fatty-acids-in-octopus-vulgaris-molecular-cloning-and-functional-characterisation-of-a-stearoyl-coa-desaturase-and-an-elongation-of-very-long-chain-fatty-acid-4-protein
#1
Óscar Monroig, Rosa de Llanos, Inmaculada Varó, Francisco Hontoria, Douglas R Tocher, Sergi Puig, Juan C Navarro
Polyunsaturated fatty acids (PUFAs) have been acknowledged as essential nutrients for cephalopods but the specific PUFAs that satisfy the physiological requirements are unknown. To expand our previous investigations on characterisation of desaturases and elongases involved in the biosynthesis of PUFAs and hence determine the dietary PUFA requirements in cephalopods, this study aimed to investigate the roles that a stearoyl-CoA desaturase (Scd) and an elongation of very long-chain fatty acid 4 (Elovl4) protein play in the biosynthesis of essential fatty acids (FAs)...
March 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28335478/lactational-stage-of-pasteurized-human-donor-milk-contributes-to-nutrient-limitations-for-infants
#2
Christina J Valentine, Georgia Morrow, Amanda Reisinger, Kelly A Dingess, Ardythe L Morrow, Lynette K Rogers
BACKGROUND: Mother's own milk is the first choice for feeding preterm infants, but when not available, pasteurized human donor milk (PDM) is often used. Infants fed PDM have difficulties maintaining appropriate growth velocities. To assess the most basic elements of nutrition, we tested the hypotheses that fatty acid and amino acid composition of PDM is highly variable and standard pooling practices attenuate variability; however, total nutrients may be limiting without supplementation due to late lactational stage of the milk...
March 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28333826/complex-relation-between-diet-and-phospholipid-fatty-acids-in-children-with-cystic-fibrosis
#3
Sara Moukarzel, Roger A Dyer, Sheila M Innis
OBJECTIVES: Altered total plasma n-6 and n-3 fatty acids are common in cystic fibrosis (CF). Whether alterations extend to plasma phosphatidylcholine (PC) and phosphatidylethanolamine (PE) and are explained by diet is unclear. The present study was to describe the dietary intake of a large group of children with CF and to determine whether dietary fat composition explains differences in plasma PC and PE fatty acids between children with and without CF. METHODS: Dietary intake was assessed using a food frequency questionnaire...
April 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28333036/apoe-%C3%AE%C2%B54-specific-imbalance-of-arachidonic-acid-and-docosahexaenoic-acid-in-serum-phospholipids-identifies-individuals-with-preclinical-mild-cognitive-impairment-alzheimer-s-disease
#4
Laila Abdullah, James E Evans, Tanja Emmerich, Gogce Crynen, Ben Shackleton, Andrew P Keegan, Cheryl Luis, Leon Tai, Mary J LaDu, Michael Mullan, Fiona Crawford, Corbin Bachmeier
This study was designed to explore the influence of apolipoprotein E (APOE) on blood phospholipids (PL) in predicting preclinical Alzheimer's disease (AD). Lipidomic analyses were also performed on blood from an AD mouse model expressing human APOE isoforms (EFAD) and five AD mutations and from 195 cognitively normal participants, 23 of who converted to mild cognitive impairment (MCI)/AD within 3 years. APOE ε4-carriers converting to MCI/AD had high arachidonic acid (AA)/docosahexaenoic acid (DHA) ratios in PL compared to cognitively normal ε4 and non-ε4 carriers...
March 23, 2017: Aging
https://www.readbyqxmd.com/read/28332043/high-arachidonic-acid-levels-in-the-tissues-of-herbivorous-fish-species-siganus-fuscescens-calotomus-japonicus-and-kyphosus-bigibbus
#5
Asada Jiarpinijnun, Soottawat Benjakul, Akasith Pornphatdetaudom, Junichiro Shibata, Emiko Okazaki, Kazufumi Osako
The lipid and fatty acid compositions in the various organs (muscle, liver, other viscera) and stomach contents of three common herbivorous fish species in Japan, Siganus fuscescens, Calotomus japonicus and Kyphosus bigibbus, were examined to explore the stable 20:4n-6 (arachidonic acid, ARA) sources. Triacylglycerol (TAG), phosphatidylethanolamine (PtdEtn), and phosphatidylcholine (PtdCho) were the dominant lipid classes, while the major FA contents were 16:0, 18:1n-9, 16:1n-7, 14:0, 18:0, 18:1n-7, and some PUFA, including ARA, 20:5n-3 (eicosapentaenoic acid, EPA), 22:5n-3 (docosapentaenoic acid, DPA), and 22:6n-3 (docosahexaenoic acid, DHA)...
March 22, 2017: Lipids
https://www.readbyqxmd.com/read/28331158/low-serum-levels-of-epa-are-associated-with-the-size-and-growth-rate-of-abdominal-aortic-aneurysm
#6
Tatsuro Aikawa, Tetsuro Miyazaki, Kazunori Shimada, Yurina Sugita, Megumi Shimizu, Shohei Ouchi, Tomoyasu Kadoguchi, Yasutaka Yokoyama, Tomoyuki Shiozawa, Masaru Hiki, Shuhei Takahashi, Hamad Al Shahi, Shizuyuki Dohi, Atsushi Amano, Hiroyuki Daida
AIM: Omega-3 polyunsaturated fatty acids (PUFAs) such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been reported to reduce the risk of cardiovascular disease. However, whether omega-3 PUFAs are involved in the pathogenesis of abdominal aortic aneurysms (AAA) remains unclear. METHODS: We analyzed 67 consecutive patients admitted for the elective surgical repair of AAA. We investigated the association of serum EPA and DHA levels as well as the EPA/AA ratio with the size of AAA assessed using three-dimensional reconstructed computed tomography images...
March 22, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28330907/plasma-%C3%AF-3-fatty-acids-in-pregnancy-are-inversely-associated-with-postpartum-weight-retention-in-a-multiethnic-asian-cohort
#7
See Ling Loy, Michelle Jia Hui Ng, Yin Bun Cheung, Keith M Godfrey, Philip C Calder, Ngee Lek, Fabian Yap, Falk Müller-Riemenschneider, Padmapriya Natarajan, Yap-Seng Chong, Kok Hian Tan, Lynette Pei-Chi Shek, Mary Foong-Fong Chong, Jerry Kok Yen Chan
Background: Studies have demonstrated associations between polyunsaturated fatty acids (PUFAs) and adiposity. It is unclear whether PUFAs in pregnancy have an effect on maternal weight retention after childbirth, which can contribute to long-term obesity.Objective: We examined the association of maternal plasma PUFAs in pregnancy with 18-mo postpartum weight retention (PPWR) in a multiethnic Asian cohort.Design: We studied pregnant women (n = 653) recruited between June 2009 and September 2010 from a prospective cohort...
March 22, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28330470/involvement-of-apoptotic-pathways-in-docosahexaenoic-acid-induced-benefit-in-prostate-cancer-pathway-focused-gene-expression-analysis-using-rt-2-profile-pcr-array-system
#8
Yanan Sun, Xiaopeng Jia, Lianguo Hou, Xing Liu, Qiang Gao
BACKGROUND: Present study aimed to better understand the potential apoptotic pathways that involved in docosahexaenoic acid (DHA)-induced apoptosis of prostate cancer cells. METHODS: Human prostate cancer DU145 cells were treated with different concentrations of fish oil, omega-3 PUFA (DHA, and Eicosapentaenoic acid, EPA), or omega-6 PUFA (Arachidonic acid, AA). Cell viability and apoptosis were evaluated by MTT assay and Hoechst staining. Pathway-focused gene expression profiling of DU145 cells was analyzed with the RT(2) Profile PCR Array System...
March 23, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28328967/phenotypic-and-molecular-characterization-of-antimicrobial-resistance-in-enterobacter-spp-isolates-from-companion-animals-in-japan
#9
Kazuki Harada, Takae Shimizu, Yujiro Mukai, Ken Kuwajima, Tomomi Sato, Akari Kajino, Masaru Usui, Yutaka Tamura, Yui Kimura, Tadashi Miyamoto, Yuzo Tsuyuki, Asami Ohki, Yasushi Kataoka
The emergence of antimicrobial resistance among Enterobacter spp., including resistance to extended-spectrum cephalosporins (ESC), is of great concern in both human and veterinary medicine. In this study, we investigated the prevalence of antimicrobial resistance among 60 isolates of Enterobacter spp., including E. cloacae (n = 44), E. aerogenes (n = 10), and E. asburiae (n = 6), from clinical specimens of dogs and cats from 15 prefectures in Japan. Furthermore, we characterized the resistance mechanisms harbored by these isolates, including extended-spectrum β-lactamases (ESBLs) and plasmid-mediated quinolone resistance (PMQR); and assessed the genetic relatedness of ESC-resistant Enterobacter spp...
2017: PloS One
https://www.readbyqxmd.com/read/28327709/fish-oil-supplementation-inhibits-endoplasmic-reticulum-stress-and-improves-insulin-resistance-involvement-of-amp-activated-protein-kinase
#10
Wenqi Yang, Xu Chen, Ming Chen, Yanping Li, Qing Li, Xinwei Jiang, Yan Yang, Wenhua Ling
The beneficial effects of fish oil consumption on glucose metabolism have been generally reported. However, the mechanism underlying the fish oil-induced protective effects against insulin resistance remains unclear. Endoplasmic reticulum (ER) stress is recognized as an important contributor to insulin resistance. The aim of this study is to evaluate whether fish oil supplementation reduces ER stress and ameliorates insulin resistance in diet-induced obese mice, and to investigate the molecular mechanism of fish oil-induced benefits on ER stress...
March 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28325837/threonine-eliminylation-by-bacterial-phosphothreonine-lyases-rapidly-causes-crosslinking-of-mapk-in-live-cells
#11
Benoit M Meijer, Suk Min Jang, Ida C Guerrera, Cerina Chhuon, Joanna Lipecka, Caroline Reisacher, Françoise Baleux, Philippe Sansonetti, Christian Muchardt, Laurence Arbibe
Old long-lived proteins contain dehydroalanine (Dha) and dehydrobutyrine (Dhb), two amino acids engendered by dehydration of serines and threonines respectively. While these residues have a suspected role in protein crosslink and aggregation, their direct implication has yet to be determined. Here, we have taken advantage of the ability of the enteropathogen Shigella to convert the phosphothreonine residue of the pT-X-pY consensus sequence of ERK and p38 into Dhb, and followed the impact of dehydration on the fate of the two MAPKs...
March 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28324081/seven-year-follow-up-of-children-born-to-women-in-a-randomized-trial-of-prenatal-dha-supplementation
#12
Jacqueline F Gould, Karli Treyvaud, Lisa N Yelland, Peter J Anderson, Lisa G Smithers, Andrew J McPhee, Maria Makrides
No abstract text is available yet for this article.
March 21, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28321653/5-aminolevulinic-acid-modulates-antioxidant-defense-systems-and-mitigates-drought-induced-damage-in-kentucky-bluegrass-seedlings
#13
Kuiju Niu, Xiang Ma, Guoling Liang, Huiling Ma, Zhifeng Jia, Wenhui Liu, Qianqian Yu
Drought stress occurs frequently and severely as a result of global climate change, and it exerts serious effects on plants. 5-Aminolevulinic acid (5-ALA) plays a crucial role in conferring abiotic stress tolerance in plants. To enhance the drought tolerance of turfgrass and investigate the effects of 5-ALA on antioxidant metabolism and gene expression under drought stress conditions, exogenous 5-ALA was applied by foliar spraying before Kentucky bluegrass (Poa pratensis L.) seedlings were exposed to drought [induced by 10% polyethylene glycol (PEG)] stress for 20 days...
March 20, 2017: Protoplasma
https://www.readbyqxmd.com/read/28320396/occurrence-of-bla-dha-1-mediated-cephalosporin-resistance-in-escherichia-coli-and-their-transcriptional-response-against-cephalosporin-stress-a-report-from-india
#14
Birson Ingti, Deepjyoti Paul, Anand Prakash Maurya, Debajyoti Bora, Debadatta Dhar Chanda, Atanu Chakravarty, Amitabha Bhattacharjee
BACKGROUND: Treatment alternatives for DHA-1 harboring strains are challenging as it confers resistance to broad spectrum cephalosporins and may further limit treatment option when expressed at higher levels. Therefore, this study was designed to know the prevalence of DHA genes and analyse the transcription level of DHA-1 against different β-lactam stress. METHODS: Screening of AmpC β-lactamase phenotypically by modified three dimensional extract method followed by Antimicrobial Susceptibility and MIC determination...
March 21, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28316988/bioengineered-plants-can-be-a-useful-source-of-omega-3-fatty-acids
#15
REVIEW
Waleed Amjad Khan, Hu Chun-Mei, Nadeem Khan, Amjad Iqbal, Shan-Wu Lyu, Farooq Shah
Omega-3 fatty acids have proven to be very essential for human health due to their multiple health benefits. These essential fatty acids (EFAs) need to be uptaken through diet because they are unable to be produced by the human body. These are important for skin and hair growth as well as for proper visual, neural, and reproductive functions of the body. These fatty acids are proven to be extremely vital for normal tissue development during pregnancy and infancy. Omega-3 fatty acids can be obtained mainly from two dietary sources: marine and plant oils...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28314621/docosahexaenoic-acid-dha-an-essential-nutrient-and-a-nutraceutical-for-brain-health-and-diseases
#16
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/28302406/docosahexaenoic-acid-in-the-treatment-of-rheumatoid-arthritis-a%C3%A2-double-blind-placebo-controlled-randomized-cross-over-study-with-microalgae-vs-sunflower-oil
#17
C Dawczynski, M Dittrich, T Neumann, K Goetze, A Welzel, P Oelzner, S Völker, A M Schaible, F Troisi, L Thomas, S Pace, A Koeberle, O Werz, P Schlattmann, S Lorkowski, G Jahreis
The potential of fish or fish oil as supplier for eicosapentaenoic acid (EPA, C20:5n3) and docosahexaenoic acid (DHA, C22:6n3) for reducing cardiovascular risk factors and supporting therapy of chronic inflammatory diseases, has been investigated intensively, but our knowledge about the physiological effects of the individual compounds EPA and DHA are limited. STUDY DESIGN: In this double-blind pilot study, thirty-eight patients with defined RA were allocated to consume foods enriched with microalgae oil from Schizochytrium sp...
March 6, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28301979/short-time-uva-exposure-to-human-keratinocytes-instigated-polyunsaturated-fatty-acid-without-inducing-lipid-peroxidation
#18
Kin Sum Leung, Hok Fung Chan, Ho Hang Leung, Jean-Marie Galano, Camille Oger, Thierry Durand, Jetty Chung-Yung Lee
Short-term exposure to ultraviolet A (UVA) radiation can directly injure our skin through inflammatory response and indirectly through oxidative stress, triggering polyunsaturated fatty acid (PUFA) peroxidation in skin cell membrane and formation of DNA adduct, 8-hydroxy-2'-deoxyguanosine (8-OHdG). It is known that UVA exposure leads to photoaging, immunosuppression and skin cancer. However, the changes in PUFA and its oxidized metabolites, and cell cycle after short UVA exposure, are debatable. In this study, human keratinocytes (HaCaT) were exposed to low dose (5 J/cm(2)) and high dose (20 J/cm(2)) of UVA and assessed immediately, 8 h, 12 h, and 24 h post-treatment...
March 17, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28301845/dietary-intakes-of-arachidonic-acid-and-docosahexaenoic-acid-in-early-life-with-a-special-focus-on-complementary-feeding-in-developing-countries
#19
Stewart Forsyth, Sheila Gautier, Norman Salem
BACKGROUND: In developing countries, dietary intakes of arachidonic acid (ARA) and docosahexaenoic acid (DHA) in early life are lower than current recommended levels. This review specifically focusses on the contribution that complementary feeding makes to ARA and DHA intakes in medium- to low-income countries. The aims of the review are (1) to determine the availability of ARA and DHA food sources in developing countries, (2) to estimate the contribution of complementary feeding to dietary intakes of ARA and DHA in infants aged 6-36 months, and (3) to relate the dietary ARA and DHA intake data to key socioeconomic and health indicators...
March 17, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28299384/impairment-of-systemic-dha-synthesis-affects-macrophage-plasticity-and-polarization-implications-for-dha-supplementation-during-inflammation
#20
Emanuela Talamonti, Anna M Pauter, Abolfazl Asadi, Alexander W Fischer, Valerio Chiurchiù, Anders Jacobsson
Docosahexaenoic acid (DHA) is an omega-3 fatty acid obtained from the diet or synthesized from alpha-linolenic acid through the action of fatty acid elongases (ELOVL) and desaturases. DHA plays important roles in the central nervous system as well as in peripheral organs and is the precursor of several molecules that regulate resolution of inflammation. In the present study, we questioned whether impaired synthesis of DHA affected macrophage plasticity and polarization both in vitro and in vivo models. For this we investigated the activation status and inflammatory response of bone marrow-derived M1 and M2 macrophages obtained from mice deficient of Elovl2 (Elovl2(-/-)), a key enzyme for DHA synthesis in mammals...
March 15, 2017: Cellular and Molecular Life Sciences: CMLS
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