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| Registros recuperados: 13 | |
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| Duran Encinas, Yazmin. |
| Crassostrea gigas is a marine invertebrate that inhabits the intertidal zone and therefore, is commonly exposed to multiple environmental stressors, including temperature. In recent years mass mortality events have been reported in Mexico in C. gigas associated with the increase in temperature during the summer. Organisms under thermal stress present an increase in prostaglandins (PG) production by cyclooxygenases (COX), an enzymatic route using arachidonic acid (ARA) present in the phospholipids (FL) of the cell membrane as substrate, but PG can also increase non-enzymatically by reactive oxygen species (ROS) that are produced during increased metabolism. It has been reported that some organisms exposed to stress accumulate a higher concentration of ARA... |
| Tipo: Text |
Palavras-chave: Arachidonic acid; Stress; Phospholipid; Isotope; Mollusk; Temperature; Triglyceride; Prostaglandin. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00620/73193/72387.pdf |
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| Pompeia,C.; Cury-Boaventura,M.F.; Curi,R.. |
| The change in cellular reducing potential, most likely reflecting an oxidative burst, was investigated in arachidonic acid- (AA) stimulated leukocytes. The cells studied included the human leukemia cell lines HL-60 (undifferentiated and differentiated into macrophage-like and polymorphonuclear-like cells), Jurkat and Raji, and thymocytes and macrophages from rat primary cultures. The oxidative burst was assessed by nitroblue tetrazolium reduction. AA increased the oxidative burst until an optimum AA concentration was reached and the burst decreased thereafter. In the leukemia cell lines, optimum concentration ranged from 200 to 400 µM (up to 16-fold), whereas in rat cells it varied from 10 to 20 µM. Initial rates of superoxide generation were high,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachidonic acid; NADPH oxidase; Nitroblue tetrazolium; Leukocytes; Reactive oxygen species. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001100013 |
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| Anido,Rodrigo Vargas; Zaniboni-Filho,Evoy; Garcia,Alexandre Sachsida; Baggio,Sueli Regina; Fracalossi,Débora Machado. |
| Knowledge about gonad fatty acid composition is important for broodstock diet formulation. This study characterized ovary fatty acid composition of wild female jundiá catfish (Rhamdia quelen) in their different gonadal maturation stages. Female jundiá (n = 36, average weight= 383.8 + 208.8 g) were captured in the rio Uruguay, comprising all seasons. Ovaries were extracted and classified according to their gonadal maturation stage. Gonad-somatic ratio varied significantly among seasons, being higher in spring (3.7), followed by summer (2.2), winter (0.9) and autumn (0.6). Main fatty acids groups detected were: saturated (SFA= 35.5%), monounsaturated (MUFA= 28.1%) and polyunsaturated fatty acids (PUFA= 33.5%). Over the four seasons, palmitic acid was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachidonic acid; Broodstock diet; Docosahexaenoic acid; Eicosapentaenoic acid; Gonadal maturation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200453 |
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| Palacios, Elena; Racotta, I; Kraffe, E; Marty, Y; Moal, Jeanne; Samain, Jean-francois. |
| Seasonal variations in fatty acid composition in several tissues of a 1-year-old population of giant lion's-paw scallop Nodipecten subnodosus were analyzed during gonad development. Samples were taken bimonthly from December 1999 to June 2000, a period in which gonad development was occurring. Fatty acid accumulation in neutral and polar lipids of the female gonad was concomitant to the gonad development and presented a maximum in June. Among essential fatty acids, a specific accumulation was observed only for 20:5n - 3 in the female gonad, as suggested by an increase in its proportion in the neutral and the polar fractions. However, no specific accumulation was observed for 22:6n - 3, as its proportion remained relatively constant in both fractions. We... |
| Tipo: Text |
Palavras-chave: Reproduction; Pectinidae; HUFA; EPA; DHA; Arachidonic acid. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-767.pdf |
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| Soares,Adriana Lourenço; Marchi,Denis Fabrício; Matsushita,Makoto; Guarnieri,Paulo Donizeti; Droval,Adriana Aparecida; Ida,Elza Iouko; Shimokomaki,Massami. |
| The aim of this work was to study the influence of lipid oxidation on broiler breast meat (Pectoralis major m) color abnormalities. There were 27.0 % more lipid oxidation in PSE in relation to normal meat and 41.0 % more in relation to DFD-like meat (p<0.05). The fatty acid profile was also significantly different since the arachidonic acid (AA) fraction increased 38.6 and 70.5 % in PSE meat comparing to normal and DFD-like meats, respectively. The ratio PUFA/SFA changed in these three types of meat: 0.736, 0.713 and 0.694 for PSE, normal and DFD-like meat respectively, reflecting the highest production of polyunsaturated fatty acids in the PSE meat samples. Results indicated that phospholipase A2 enzyme activities played a relevant role towards the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PSE meat; DFD meat; Arachidonic acid. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600023 |
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| Carciofi, Aulus Cavalieri; Bazolli, Rodrigo Sousa; Prada, Flávio. |
| between pro-inflammatory PUFA cis-linoleic (w6) and acachidonic (w6), versus the less inflammatory PUFA alpha-linolenic (w3), gamma-linolenic (w6), eicosapentaenoic (w3) and docosaeicosahenoic(w3) determines the fami1y of leukotrienes, prostaglandins and thromboxanes produced in the tissues, resulting in more or less inflammation (vasodilatation, aggregation, painful, etc.). Clinical studies have indicated positive effect of dietary relationship ofw6:w3 varying from 10:1to 2: I in inflammatory and coetaneous allergic diseases, arthritis, some tumors, kidney and cardiac disease, indicating a promising way to be explored. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polyunsaturated fatty acids; Arachidonic acid; Linolenic acid; Dog; Cat; Inflammation ácido graso poliinsaturado; Acido aracdónico; Ácido linolénico; Perro; Gato; Inflamación ácido graxo poliinsaturado; Ácido aracdônico; Ácido linolênico; Cão; Gato; Inflamação. |
| Ano: 2002 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3293 |
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| Seguineau, Catherine; Soudant, P; Moal, Jeanne; Delaporte, Maryse; Miner, Philippe; Quere, Claudie; Samain, Jean-francois. |
| The present study tested two techniques for dietary supplementation of Crassostrea gigas spat with PUFA, such as arachidonic acid (AA). The first technique consisted of a preliminary enrichment and growth of an algal concentrate (T-ISO, Isochrysis sp.) with AA dissolved in an ethanol solution, the whole culture then being fed to the spat. This enrichment increased the AA weight percentage in T-ISO neutral and polar lipids from 0.6 to 22.4% and from 0.4 to 6.8%, respectively. The second delivery technique was direct addition separately of free AA dissolved in ethanol solution and algal concentrate (T-ISO + AA) to the spat-rearing tank. To test the efficiency of these delivery techniques, oyster spat were supplemented with AA-enriched T-ISO, T-ISO + AA, and... |
| Tipo: Text |
Palavras-chave: Food supply; Arachidonic acid; Spat; Crassostrea gigas; Dietary. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1094.pdf |
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| Registros recuperados: 13 | |
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