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Biological functions of selenium and its potential influence on Parkinson's disease Anais da ABC (AABC)
ELLWANGER,JOEL H.; FRANKE,SILVIA I.R.; BORDIN,DIANA L.; PRÁ,DANIEL; HENRIQUES,JOÃO A.P..
ABSTRACT Parkinson's disease is characterized by the death of dopaminergic neurons, mainly in the substantia nigra, and causes serious locomotor dysfunctions. It is likely that the oxidative damage to cellular biomolecules is among the leading causes of neurodegeneration that occurs in the disease. Selenium is an essential mineral for proper functioning of the brain, and mainly due to its antioxidant activity, it is possible to exert a special role in the prevention and in the nutritional management of Parkinson's disease. Currently, few researchers have investigated the effects of selenium on Parkinson´s disease. However, it is known that very high or very low body levels of selenium can (possibly) contribute to the pathogenesis of Parkinson's disease,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neurodegeneration; Nutrition; Oxidative stress; Parkinson's disease; Selenium.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501655
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Brazil nuts: determination of natural elements and aflatoxin Acta Amazonica
Martins,Maristela; Pacheco,Ariane Mendonça; Lucas,Ana Cyra Santos; Andrello,Avacir Casanova; Appoloni,Carlos Roberto; Xavier,Jose Junior Mendonça.
A study was carried out to evaluate the association of levels of radioactivity, selenium and aflatoxin in shelled Brazil nuts, which were classified in different sizes, for export. The selenium determinations were performed by inductively coupled plasma optical emission spectrometry (LOQ = 3.0 µg g-1), and aflatoxins were detected by Liquid chromatography-mass spectrometry (LOQ = 0.85 µg kg-1), recovery rates were between 92 and 100%. Radioactivity was measured by high-resolution gamma spectrometry. The selenium mean concentration was (22.7 ± 7.4) µg g-1. (n = 30). Mean activities determined for the following radium isotopes were: 15.77 Bq kg-1 for 224Ra, 104.8 Bq kg-1 for 226Ra and 99.48 Bq kg-1 for 228Ra. For 226Ra, the levels did not vary significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Radioactivity; Selenium; Bertholletia excelsa.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000100018
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Carcass characteristics and meat evaluation of Nelore cattle subjected to different antioxidant treatments R. Bras. Zootec.
Carmo,Thiago de Jesus do; Peripolli,Vanessa; Costa Jr,João Batista Gonçalves; Tanure,Candice Bergmann; Fioravanti,Maria Clorinda Soares; Restle,João; Kindlein,Liris; McManus,Concepta.
ABSTRACT Forty Nelore cattle were used to evaluate the effects of supplementation with different antioxidants on carcass characteristics and meat quality of feedlot cattle. Animals were fed Brachiaria brizantha hay and subjected to five treatments (control and four antioxidants: zinc, selenium, vitamin E, and selenium + vitamin E). After a 105-day feeding period, cattle were slaughtered. Tissue composition, as well as carcass proximate composition, color, tenderness, pH, and fatty acid profile were evaluated. Analysis of variance was carried out and means compared by Tukey test at 0.05 probability. The group fed selenium showed the lowest muscle amount (66.61 g/100 g) compared with the other antioxidants evaluated. There was no difference among treatments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fatty acid; Saponin; Selenium; Vitamin E; Zinc.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200138
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Chapter E: Selenium mobility in soils and its absorption, translocation, and metabolism in plants NWISRL
Mayland, H.F.; Gough, L.P.; Stewart, K.C..
Tipo: Conference or Workshop Item Palavras-chave: Selenium; Mass Import - autoclassified (may be erroneous).
Ano: 1991 URL: http://eprints.nwisrl.ars.usda.gov/909/1/744.pdf
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Chapter I: Selenium in soils and plants from native and irrigated lands at the Kendrick Reclamation Project Area, Wyoming NWISRL
Erdman, J.A.; Severson, R.C.; Crock, J.G.; Harms, T.F.; Mayland, H.F..
Tipo: Conference or Workshop Item Palavras-chave: Selenium; Mass Import - autoclassified (may be erroneous).
Ano: 1991 URL: http://eprints.nwisrl.ars.usda.gov/907/1/742.pdf
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Characterization and Metal Detoxification Potential of Moderately Thermophilic Bacillus cereus from Geothermal Springs of Himalaya BABT
Ghalib,Aslam Khan; Yasin,Muhammad; Faisal,Muhammad.
Two thermophilic Bacillus cereus strains (B. cereus-TA2 and B. cereus-TA4) used in the present study were isolated from the geothermal spring of Hunza valley, Gilgit, Pakistan. They showed the ability to withstand and grow at high temperature (85°C). Both these strains could resist multiple metals (copper, cadmium, mercury, manganese, zinc, arsenic, chromium and selenium). Strain B. cereus-TA4 reduced Cr (VI) at pH 5.0 to 9.0 but maximum reduction (83%) was observed at pH 7.0 after 48 h when initially supplied with 200 µg mL-1of K2CrO4. Lower initial concentrations such as 100 µg mL-1 supported higher reduction (90 to 95%) than that of high concentration such as 500 µg mL-1 (20 to 30%). Both the strains reduced nearly 70% of Se (IV) after 48 h of growth at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromium; Bioremediation; Selenium; Heavy metals.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400554
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Chemical profile, agaritine and selenium content of Agaricus bisporus BABT
Mohamed,Eman Mostafa.
Chemical profile of the Agaricus bisporus samples were analyzed using GC/MS method in ethanolic extracts. A total of 174 metabolic products were detected, which included 13 significant metabolites between 1.2 to 83 % (w/w); other 13 metabolites at 1% (w/w) and 148 metabolites less than 1% classified into 12 categories. These metabolites had many medicinal activities, which included anti-cancer, anti-cardiovascular diseases, anti-hypercholesterol, anti-microbial, hepatoprotective, human health supporting and immune enhancer. HPLC analysis of water extracts of the A. bisporus samples showed that the spores and gills in the fresh adult mushroom had higher percentage of agaritine mycotoxin than the other parts. These contents were decreased by different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agaricus bisporus; Chemical profile; Agaritine; Selenium; Anticancer; Antihypercholesterol; Aroma compounds; Galvanometric; GC/MS and HPLC.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000600015
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Co-operative effect of glutathione depletion and selenium induced oxidative stress on API and NFkB expression in testicular cells in vitro: insights to regulation of spermatogenesis Biol. Res.
SHALINI,SONIA; BANSAL,MOHINDER P.
Previous studies have shown that transcription factors, API and NFkB exert important roles in the process by which selenium regulates spermatogenesis. Glutathione, an intracellular thiol, acts as a source of reducing power and aids in maintenance of the cellular redox status. The activities of selenium are closely related to the availability of glutathione. Presently, mouse testicular cells were cultured in the presence of BSO, a known glutathione depletor, to generate oxidative stress. Selenium (Se) was added as sodium selenite to these cells at concentrations of 0.5 µM and 1.5 µM. It was observed that at 1.5 µM, Se acted as a pro-oxidant and significantly decreased the redox ratio. RT PCR analysis revealed that cjun, cfos expression increased in...
Tipo: Journal article Palavras-chave: API; BSO; GSH; NFkB; Oxidative stress; Selenium; Testicular cells.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400005
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Determination of selenium toxicity to Oreochromis niloticus based on hematological parameters - doi: 10.4025/actascibiolsci.v34i2.8755 Biological Sciences
Seriani, Robson; Instituto de Pesca-SP - IP/SAA.; Ranzani-Paiva, Maria José Tavares; Instituto de Pesca-SP - IP/SAA.; Gonçalves, Adriano; Centro de Aquicultura, Universidade Estadual Paulista “Júlio de Mesquita Filho"; Siqueira, Silmara Regina; Instituto de Pesca-SP - IP/SAA.; Lombardi, Julio Vicente; Instituto de Pesca-SP - IP/SAA..
Selenium (Se) is described as an essential micronutrient and participates in different biological functions, as the antioxidant defense systems maintenance and regulation. However, when in high concentrations, Se may cause toxic effects as well as hematological changes in fish. The aim of the present study was to determine the toxicity of selenium in the form of sodium selenate (Na2Se6+O4) in Oreochromis niloticus based on hematological parameters, after exposure to different concentrations (0.01, 0.14 and 1.4 mg Se6+ L-1). The erythrocytic and leukocytic series were examined over 14 days at intervals of 0, 3, 5, 7,10 and 14 days. The erythrocytic series showed significant alterations in the first 7 days, including the control group. Neutrophils and...
Palavras-chave: 2.07.01.00-4 haematological; Water pollution; Selenium; Toxicity Fisiologia.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8755
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Distribution of selenium in sheep treated with dipheny diselenide Arq. Bras. Med. Vet. Zootec.
Leal,M.L.R.; Rocha,J.B.T.; Corte,C.L.D.; Aires,A.R.; Rocha,J.F.X.; Zanatta,R.S.; Carpes,J.L.S.; Szinwelski,G.A.; Stefanello,S.; Pivoto,F.L..
ABSTRACT The aim of the present study was to report the in vivo distribution of selenium in sheep. For this, animals were allocated into two groups (control group and treated group) and kept in metabolic cages for a period of 37 days. The treated group received a single dose (6µmol/kg) of Diphenyl Diselenide, intravenously. Plasma and erythrocytes samples were collected at different times. Adipose tissue, muscles (latissimusdorsi, semitendinosus, and supra-scapular) heart, liver, lung, kidney, intestine and brain were sampled at 30 days post-treatment, in order to determine the selenium concentration. The results demonstrated that the selenium, from the Diphenyl Diselenide group, was higher in erythrocytes (4.8mg/L, six hours post-treatment) when compared...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Ovine; Selenium; Tissue.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401017
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Effect of different sources of selenium on performance and characteristics of immune system of broiler chickens R. Bras. Zootec.
Shabani,Roozbeh; Fakhraei,Jafar; Yarahmadi,Hossein Mansoori; Seidavi,Alireza.
ABSTRACT An experiment was conducted based on a completely randomized design with 500 Ross 308 broiler chickens to investigate the effect of three different sources of selenium on performance and characteristics of immune system. Chickens were arranged in 10 treatments and five repetitions (10 chickens for each repetition). Ten treatments of experimental diet were considered in the study, including a basal diet (control); 0.5, 0.8, and 1.2 mg nano-selenium + basal diet (three treatments); 0.5, 0.8, 1.2 mg selenomethionine + basal diet; and 65, 80, and 100 mg vitamin E + selenium + basal diet. Findings suggested that adding selenomethionine (1.2 mg) to the basal diet resulted in a significant effect on feed conversion ratio and weight of broilers. In fact,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Immune response; Immunoglobin; Selenium.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100535
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Effect of protein, carbohydrate, lipid, and selenium levels on the performance, carcass yield, and blood changes in broilers Rev. Bras. Ciênc. Avic.
Hada,FH; Malheiros,RD; Silva,JDT; Marques,RH; Gravena,RA; Silva,VK; Moraes,VMB.
The objective of this study was to evaluate the performance, carcass and parts yield, and blood changes in broilers fed different protein, carbohydrate, and lipid levels. Birds were fed a commercial diet until seven days of age. On day 8, birds were distributed according to a completely randomized experimental design in a 4 x 2 factorial arrangement (control diet, low protein diet, low carbohydrate diet or low lipid diet vs. supplementation of 0 or 0.3ppm organic selenium) with four replicates of 15 birds each. Broilers fed low protein presented lower body weight, feed intake, and worse feed conversion ratio on day 42, as well as lower carcass and breast yields, higher leg and abdominal fat yields, higher triglyceride and lower uric acid blood levels....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbohydrates; Lipids; Blood parameters; Protein; Selenium.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400014
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EFFECT OF SELENITE ON THE TOTAL POLYPHENOL CONTENT AND ANTIOXIDATIVE ACTIVITY OF AQUEOUS AND ETHANOLIC EXTRACTS IN SPROUTS OF FOUR AGRONOMIC SPECIES R.C. Suelo Nutr. Veg.
Motomura,Yoshie; Reyes-Díaz,Marjorie; Mora Gil,Maria de la Luz.
Sprouts from some agricultural plants grown under dark conditions are known to contain some functional food ingredients. Recently, great attention has been paid to foods with natural antioxidative ingredients for human health and animal feed. Among the functional food compounds, phenolics and polyphenols are the most desirable food bioactives due to their antioxidative activity. The aim of this study was to determine the differences between aqueous and ethanohc extracts and the effect of selenite on the polyphenol content, and whether the antioxidative activity of selenite-treated sprouts growing in Petri dishes is enhanced compared to non-treated ones. The total polyphenol content in aqueous extract and ethanolic extract increased significantly in wheat...
Tipo: Journal article Palavras-chave: Antioxidative activity; Crop seedling; Ethanohc extract; Polyphenol; Selenium.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000100005
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Effect of selenium-vitamin E injection in selenium-deficient dairy goats and kids on the Mexican plateau Arq. Bras. Med. Vet. Zootec.
Ramírez-Bribiesca,J.E.; Tórtora,J.L.; Huerta,M.; Hernández,L.M.; López,R.; Crosby,M.M..
Three experiments were carried out to determine the optimum selenium-vitamin E injection level to maintain acceptable blood selenium (Se) status of does and kids, as well as to determine the relation of that status to mortality rates in kids. In experiment 1, 238 goats were assigned to one of three groups during the mating period: A1-control, A2- 0.06mgSe+0.8IU vitE/kgBW and A3-0.125mgSe+1.7IU vitE/kgBW. No differences (P>.05) for fertility and prolificacy were observed among the groups. Blood Se concentration did not differ among Se-vit E groups and control group before injection, and both groups showed Se deficient condition. There was a trend (P<.05, 32%) to increase Se blood level 60 days post-treatment, but difference was not observed between A2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Goat; Selenium; Vitamin E; México.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000100011
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Effect of the supplementation of vitamins and organic minerals on the performance of broilers under heat stress Rev. Bras. Ciênc. Avic.
Laganá,C; Ribeiro,AML; Kessler,AM; Kratz,LR; Pinheiro,CC.
The objective of this experiment was to evaluate the effect of diet supplementation with vitamins C and E and organic minerals Zn and Se on the performance of 1 to 35 day-old broilers from, kept under cyclic heat stress (25 to 32ºC). Four levels of vitamin-mineral supplementation were used (T1-control diet (60/30 IU of vit E for starter and growing diet, respectively, zero vit. C, 80 ppm of inorganic Zn, 0.3 ppm of inorganic Se); T2-control diet + 100 UI vit E and 300 ppm vit C/kg; T3-control diet + 40 ppm Zn and 0,3 ppm Se/kg; T4-control diet + T2 and T3 levels) and two environments - thermoneutral and cyclic heat stress (TN and HS) from 14 to 35 days of age. In the period when part of the birds was submitted to HS, from 14 to 35 days, it was observed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascorbic acid; Dl-alpha-tocopherol; Selenium; Thermal regulation; Zinc.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100006
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Evaluación de dos compuestos comerciales con cromo+selenio quelatados y Saccharomyces cerevisiae en dietas para ovinos en engorda. Colegio de Postgraduados
Reséndiz Hernández, Miriam.
El objetivo de este estudio fue evaluar el efecto de dos fuentes orgánicas queladas comerciales, Cr-levadura y Se-levadura, y de Saccharomyces cerevisiae (SC), en la digestibilidad in situ de la MS, FDN, FDA y PC; pH, AGV y N-NH3 en el rumen; consumo de MS, ganancia diaria de peso (GDP), conversión alimenticia (CA), peso y contenido de grasa de la canal de borregos. Los tratamientos fueron: 1) testigo (T; sin Cr, Se, ni SC); 2) T + Cr + Se; 3) T + SC; y 4) T + Cr + Se + SC, los cuales se asignaron al azar a 20 borregos criollos (29.88 ± 2.98 kg) en finalización para el experimento de variables productivas; y en un cuadro latino 4 x 4 con cuatro borregos machos (30 ± 2 kg) con cánula ruminal para evaluar degradación in situ y variables de fermentación...
Palavras-chave: Cromo; Selenio; Levadura; Ovinos; Digestibilidad; Rumen; Chromium; Selenium; Yeast; Sheep; Digestibility; Maestría; Ganadería.
Ano: 2012 URL: http://hdl.handle.net/10521/750
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Evolution of Forest Systems: the Role of Biogeochemical Cycles in Determining Sustainable Forestry Practices Ecology and Society
Flueck, Werner T.; National Council for Scientific and Technical Research (CONICET), Argentina; Institute of Natural Resources Analysis, Universidad Atlantida Argentina; Swiss Tropical Institute, University of Basel; wtf@deerlab.org.
The exploitation of natural resources such as forests leads to sustainable forest management (SFM). The key question is how to define and parametrize &#8220;sustainable use.&#8221; Promoting forest use that conserves spatial characteristics of forest landscapes and the structure and composition of forest stands was proposed as a way of maintaining elements of biodiversity such as species richness and genetic variation. However, to establish the parameter space for sustainable forest use, it is essential to consider the nutrient requirements of forest systems, that is, plants and animals, the need for fertilizer application, and the effects on biogeochemical cycles, a cornerstone of biological evolution and, thus, biodiversity. The use of forest...
Tipo: Peer-Reviewed Response Palavras-chave: Biogeochemical cycle; Fertilizer; Macronutrients; Micronutrients; Phosphorus; Selenium; Sustainable forest management.
Ano: 2009
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Feeding different levels of vitamin E and selenium has no effect on serum immunoglobulin Y (IgY) production by layers vaccinated against Escherichia coli and avian encephalomyelitis virus Ciência Rural
Kindlein,Giselle; Ribeiro,Andréa Machado Leal; Canal,Cláudio Wageck; Vieira,Maitê de Moraes.
The effects of vitamin E and selenium (Se) supplementation on the immunity of hens vaccinated against a mixture of six swine-pathogenic Escherichia coli (EC) and avian encephalomyelitis virus (AEV) were studied. Antibody production (AbP) was evaluated in ninety 49 to 57-week-old H&N Nick Chick hens fed diets containing 14IU Vitamin E kg-1 (basal diet), 27, 59, 111, or 111IU vitamin E kg-1 + 0.56ppm Se supplementation. At 51 wks of age, half of the hens were vaccinated against EC, and all birds were vaccinated against AEV. At 53-weeks of age, the birds received a second dose of EC vaccine. Blood samples were collected weekly and serum was analyzed by ELISA for anti-EC IgY and was expressed as optical density (OD). Vaccinated hens had higher serum OD...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avian encephalomyelitis; Escherichia coli; Immunoglobulin; Selenium; Vitamin E.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000500024
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Hypercholesterolemia and tissue-specific differential mRNA expression of type-1 5'-iodothyronine deiodinase under different selenium status in rats Biol. Res.
DHINGRA,SANJIV; BANSAL,MOHINDER P.
Type-1 5'-iodothyronine deiodinase (5'-DI) is responsible for conversion of T4 to T3. Selenium (Se) is an integral part of this enzyme. Keeping in view the strong association between atherosclerosis and hypothyroidism, the present study examined the behavior of 5'-DI in liver, aorta and thyroid during hypercholesterolemia following different Se status, i.e., Se deficiency (0.02ppm), adequate (0.2ppm) and excess dose (1ppm) in SD male rats. Animals were fed a control or high-cholesterol diet (2%) for 1 and 2 months. 5'-DI activity and mRNA expression was measured by RIA and RT-PCR respectively. In liver and aorta, 5'-DI expression significantly decreased with the Se-deficient and the high-cholesterol diet. The trend was opposite in thyroid, i.e., mRNA...
Tipo: Journal article Palavras-chave: Selenium; Hypercholesterolemia; 5'-DI; Cholesterol; RT-PCR.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200013
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Identifying Market Preferences for High Selenium Beef AgEcon
Hovde, Scott C.; Wachenheim, Cheryl J.; Hearne, Robert R.; Nganje, William E..
Selenium is an element found in relatively high concentrations in crops and livestock raised on high-selenium soils located in North and South Dakota. Evidence suggests that a high-selenium diet such as would be obtained from consuming these products can reduce the risk of certain cancers. The region's livestock and grain producers are exploring potential high-selenium product marketing opportunities. A choice experiment was conducted to identify preferred attributes for a high-selenium beef product and the characteristics of potential market segments. In a national survey, participants chose between different levels of health claim approval and research, prices, and selenium origin. A multinomial logit regression model was estimated. Labeling...
Tipo: Report Palavras-chave: Choice Experiment; FDA approval; Functional Foods; Health Claim; Labeling; Selenium; Consumer/Household Economics; Livestock Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/7633
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