Anti Oxidants
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Artemisia annua increases resistance to heat and oxidative stresses, but has no effect on lifespan in Caenorhabditis elegans
Abstract It is suggested that oxidative stress induced by cellular reactive oxygen species is one of the major causal factors of aging. The effect of dietary supplementation of anti-oxidants on response to environmental stressors and lifespan has been studied in various model organisms. In the present study, we examine the effect of Artemisia annua extract o
Food Sci. Technol. Publicado em: 31/05/2016
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2. Prophylaxis and therapeutic effects of raspberry (Rubus idaeus) on renal stone formation in Balb/c mice
PURPOSE: To evaluate the prophylactic potential of herbal decoction from Rubus idaeus, a medicinal plant widely used in the Middle East to treat kidney stones, by assessing the effect of administration in experimentally induced calcium oxalate (CaOx) nephrolithiasis in mice. MATERIALS AND METHODS: This study was based on administration of glyoxylate and/or h
International braz j urol. Publicado em: 2011-04
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3. Resistance of melanized yeast cells of Paracoccidioides brasiliensis to antimicrobial oxidants and inhibition of phagocytosis using carbohydrates and monoclonal antibody to CD18
Paracoccidioides brasiliensis, a thermal dimorphic fungal pathogen, produces a melanin-like pigment in vitro and in vivo. We investigated the involvement of carbohydrates and monoclonal antibody to CD18, on phagocytosis inhibition, involving macrophage receptors and the resistance of melanized fungal cells to chemically generated nitric oxide (NO), reactive
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-07
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4. Ozone therapy, contributions for Veterinary Dentistry / Estudo da ozonioterapia como contribuição para a odontologia veterinária
Ozone, the triatomic form of oxygen, has been widely studied over the years. With a very oxidative potential, acts against bacteria, fungi, protozoa and viruses. The high instability, after a few minutes makes it return to the oxygen form. This is important because of the non residual effect on the environment. The ozone has also an immune modulating effect,
Publicado em: 2009
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5. Estresse orgânico e atividade anti e pró-oxidante na queimadura aguda e no pós-operatório de cirurgia reparadora de seqüelas do trauma térmico / Organic stress and anti- and pro-oxidant activity in acute burns and during the postoperative period of surgery for the repair of the sequels of thermal shock.
O estresse orgânico decorrente da queimadura é intenso e prolongado. O hipercatabolismo e o hipermetabolismo secundários alteram o sistema de pró e anti-oxidantes. Pela necessidade de reepitelização da área doadora e receptora, a cirurgia reparadora pode desencadear ou perpetuar o estresse oxidativo. Objetivos: Em pacientes vítimas de trauma térmico
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/10/2008
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6. Stress-induced neuroinflammation: mechanisms and new pharmacological targets
Stress is triggered by numerous unexpected environmental, social or pathological stimuli occurring during the life of animals, including humans, which determine changes in all of their systems. Although acute stress is essential for survival, chronic, long-lasting stress can be detrimental. In this review, we present data supporting the hypothesis that stres
Brazilian Journal of Medical and Biological Research. Publicado em: 2008-12
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7. Efeito protetor de proantocianidinas de sementes de Vitis vinifera L. (Vitaceae) contra efeitos genotóxicos do cloridrato de Doxorrubicina, em células somáticas de Drosophila melanogaster
Proantocianidinas (PAs), também conhecidas como taninos condensados, são oligômeros e polímeros de unidades monoméricas de flavan-3-ol, naturalmente encontradas em folhas, flores, frutos, sementes, castanhas e cascas de muitas plantas. Proantocianidinas de sementes de uva (GSPs) são utilizadas como suplementos nutricionais, antioxidantes, na prevençã
Publicado em: 2008
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8. Análise de imagem em química analítica: empregando metodologias simples e didáticas para entender e prevenir o escurecimento de tecidos vegetais
A simple and didactic experiment was developed for image monitoring of the browning of fruit tissues caused by the enzyme polyphenol oxidase. The procedure, easy and inexpensive, is a valuable tool to teach and demonstrate the redox reaction between the enzyme and the natural polyphenols. To obtain the browning percentage for apple, pear and banana, digital
Química Nova. Publicado em: 2005-06
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9. Anti-neutrophil elastase defense of the normal human respiratory epithelial surface provided by the secretory leukoprotease inhibitor.
Secretory leukoprotease inhibitor (SLPI), a 12-kD nonglycosylated serine antiprotease with a high capacity for inhibiting neutrophil elastase (NE), is produced by cells of mucosal surfaces including the human lung. The molar concentrations of SLPI in total respiratory tract epithelial lining fluid (ELF) were 56 +/- 10% that of alpha 1-antitrypsin, suggesting
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10. Antioxidant macromolecules in the epithelial lining fluid of the normal human lower respiratory tract.
We hypothesized that the alveolar structures may contain extracellular macromolecules with antioxidant properties to defend against oxidants. To evaluate this 51Cr-labeled human lung fibroblasts (HFL-1) and cat lung epithelial cells (AKD) were exposed to a H2O2-generating system and alveolar epithelial lining fluid (ELF) from healthy nonsmokers was tested fo
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11. Oxidants spontaneously released by alveolar macrophages of cigarette smokers can inactivate the active site of alpha 1-antitrypsin, rendering it ineffective as an inhibitor of neutrophil elastase.
Current concepts relating to the pathogenesis of emphysema associated with cigarette smoking is that an imbalance exists within the lower respiratory tract between neutrophil elastase and the local anti-neutrophil elastase screen, enabling uninhibited neutrophil elastase to destroy the alveolar structures over time. The possible role of alveolar macrophages
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12. Immunolocalization of superoxide dismutase in Dirofilaria immitis adult worms.
Superoxide dismutase (SOD) may not only perform a housekeeping role in filarial worms but also assist in defense against oxidants generated by host immune cells. Both Dirofilaria and Onchocerca adult filariae and microfilariae contain relatively high activities of the antioxidant enzyme SOD; adult Dirofilaria worms also secrete SOD in vitro. In addition, sup