Nitrogen metabolism in coffee plants in response to nitrogen supply by fertigation

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Tropical soils with high aluminum concentrations cause oxidative stress in two tomato genotypes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Efeito da coenzima Q10 nos danos oxidativos induzidos pela L-tiroxina no músculo sóleo de ratos

Introduction: skeletal muscles are dynamic tissue that can change their phenotypic characteristics providing a better functional adaptation to different stimuli. L-thyroxine is a hormone produced by the thyroid gland and has been used as an experimental model for stimulation of oxidative stress in skeletal muscle. Coenzyme Q10 (CoQ10) is a fat-soluble provitamin endogenously synthesized and found naturally in foods such red meat, fish, cereals, broccoli and spinach. It has antioxidant properties and potential in the treatment of degenerative and neuromuscular diseases. Objective: to evaluate the protective effect of CoQ10 in the soleus muscle of rats against the oxidative damage caused by L-thyroxine. Methods: the rats were divided in four groups of six animals each: Group 1 (control); Group 2 (coenzyme Q10); Group 3 (L-thyroxine), and Group 4 coenzyme Q10 and L-thyroxine). After euthanasia, blood was collected and serum activity of the enzymes creatine kinase (CK) and aspartate aminotransferase (AST) was analyzed. In the soleus muscle homogenates the factors related to oxidative stress were assessed. Results: CoQ10 protected the soleus muscle against the damage caused by L-thyroxine and favored the maintenance of the antioxidant enzymes glutathione reductase and glutathione peroxidase, the concentration of decreased and oxidized glutathione, and prevented lipid peroxidation. Conclusion: the results indicate that CoQ10 protects rat soleus muscle from oxidative damage caused by L-thyroxine.

Protective effect of bixin on carbon tetrachloride-induced hepatotoxicity in rats

Background: The liver is an important organ for its ability to transform xenobiotics, making the liver tissue a prime target for toxic substances. The carotenoid bixin present in annatto is an antioxidant that can protect cells and tissues against the deleterious effects of free radicals. In this study, we evaluated the protective effect of bixin on liver damage induced by carbon tetrachloride (CCl4) in rats.Results: The animals were divided into four groups with six rats in each group. CCl4 (0.125 mL kg(-1) body wt.) was injected intraperitoneally, and bixin (5.0 mg kg(-1) body wt.) was given by gavage 7 days before the CCl4 injection. Bixin prevented the liver damage caused by CCl4, as noted by the significant decrease in serum aminotransferases release. Bixin protected the liver against the oxidizing effects of CCl4 by preventing a decrease in glutathione reductase activity and the levels of reduced glutathione and NADPH. The peroxidation of membrane lipids and histopathological damage of the liver was significantly prevented by bixin treatment.Conclusion: Therefore, we can conclude that the protective effect of bixin against hepatotoxicity induced by CCl4 is related to the antioxidant activity of the compound.

Biochemical responses in mussels Perna perna exposed to diesel B5

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Mechanisms involved in reproductive damage caused by gossypol in rats and protective effects of vitamin E

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cadmium stress antioxidant responses and root-to-shoot communication in grafted tomato plants

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estresse salino em plantas jovens de cana-deaçúcar: respostas bioquímicas e fisiológicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fungicidas de efeitos fisiológicos no metabolismo e desenvolvimento de plantas de melão rendilhado sob cultivo protegido

Pós-graduação em Agronomia (Horticultura) - FCA

Ação de fungicidas no desenvolvimento de plantas de tomate, em condições de ambiente protegido

Pós-graduação em Agronomia (Horticultura) - FCA

Reguladores vegetais e nutrientes minerais no metabolismo de plantas de tomateiro

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Mecanismos de ação antioxidante no estado de pós-hipóxia induzida em Phrynops geoffroanus (Testudines:Chelidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Atributos químicos, bioquímicos e microbiológicos em solos com 18 anos de aplicações anuais de lodo de esgoto

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência da temperatura nas respostas aos biocidas diazinon e carbaril em Dilocarcinus pagei Stimpson, 1861

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Atividade da enzima nitrato redutase em cultivares de arroz de terras altas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)