325 resultados para Imipramina : Tratamento crônico : Ratos
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Pós-graduação em Ciências Biológicas (Farmacologia) - IBB
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Odontologia - FOA
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Pós-graduação em Odontologia - FOA
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Pós-graduação em Odontologia - FOA
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Pós-graduação em Odontologia - FOAR
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Pós-graduação em Odontologia - FOAR
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Considering that alcohol has been identified, in the literature, as an evident risk factor for osteoporosis development, inducing loss of bone mass, the aim of this study was to evaluate the effect of the alcohol on the femur of male and female rats. For this purpose, 35 male and 35 female rats, divided into seven groups of five animals per genera were included. The groups were: control group that received food and water as much as they wished; alcohol group in the concentrations of 10, 20 and 30% and the isocalorie: groups corresponding to the concentration of alcohol. After 8 weeks, the animals were sacrificed and evaluated regarding to the body weight and nutritional conditions. Unilateral femurs were removed and analyzed in relation to the length, width, and thickness of the bone cortical, trabeculae percentage and optical density. Data obtained were analyzed by ANOVA (Tukey; p<0.05). Regarding to the weight, loss of weight was observed in the animals of the group alcohol 20% among females and 30% among the males. In relation to the nutritional conditions, the females with the dosages of 10, 20 and 30% of alcohol swallowed a mean of 25, 39 and 53% of Kcall and the males 22, 36 and 45 Kcal Jday coming from the alcohol. Alcohol reduced the length of the femur only in the group MG6. Mesio-distal width was higher in the group FG6 although the antero-posterior width was not modified. The cortical thickness among males and females was not altered however the percentage of trabeculae bone was reduced among females alcohol 30% and among males with the three alcoholic concentrations. Optical density was reduced in the concentration of 30% among the males and females. Under the experimental conditions, it could be concluded that the effect of alcohol was more evident among the males and in the trabeculae bone, and that the alcoholic concentration of 30% was the most harmful for the bone tissue, ....
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Pós-graduação em Odontologia - FOAR
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The use of pesticides in Brazil has intensified over the years. And since 2009 it was ranked as the largest market for pesticides worldwide. The consequential diffuse contamination of the environment is therefore due to the increasing number of chemicals of different classes, origins and modes of action. Little is known about the action of pesticides on human health in situations of co-exposure. Possible toxic effects are not restricted to agricultural and industrial workers, but also the general population that may be exposed continuously to its residues in food and water. Although these pesticides are mostly present in the environment at low doses, it must be considered that possible cumulative or synergistic effects may occur when there are concurrent or sustained exposure for two or more of these agents, which can lead to late manifestation of subclinical damages, sometimes irreversible. Thus, the specific objective of this study was to assess the effect of carcinogenesis promotion of a mixture of pesticides at low doses and analyze the phenomena of cell proliferation and apoptosis in rat liver. A total of 50 male Lewis rats was separated into 5 groups for 8 weeks in a medium term hepatocarcinogenesis model. The three different classes of pesticides (dieldrin, dicofol, endosulfan, dichlorvos and permethrin), whose residues were detected by ANVISA during the period from 2001 to 2005 in tomatoes cultures, were added to the feed of rats initiated to hepatocarcinogenesis with diethylnitrosamine (DEN- 200mg/kg ip). We used two different mixtures, one with no toxic effects at doses (MEX1) referring to the NOEL (no-observed-effect level) and another at doses LOEL / LEL / LOAEL (Lowest-observed-effect level / Lowest-effect level / Lowest -observed-adverse-effect level), to the installation of adverse effects (MEX2), derived from chronic studies. All animals ...(Complete abstract click electronic access below)
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Não disponível
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)