Teses em Doenças Tropicais (Doutorado) - PPGDT/NMT
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/3560
O Doutorado Acadêmico em Doenças Tropicais iniciou em 2007 e pertence ao Programa de Pós-Graduação em Doenças Tropicais do Núcleo de Medicina Tropical (NMT) da Universidade Federal do Pará (UFPA).
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Navegando Teses em Doenças Tropicais (Doutorado) - PPGDT/NMT por Orientadores "PINHEIRO, Maria da Conceição Nascimento"
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Item Acesso aberto (Open Access) Avaliação bioquímica, hormonal e de parâmetros de crescimento na exposição pós-natal ao metilmercúrio em ratos wistar(Universidade Federal do Pará, 2016-08-19) XAVIER, Fábio Branches; PINHEIRO, Maria da Conceição Nascimento; http://lattes.cnpq.br/6353829454533268The effects of methylmercury on growth hormone and its relation to liver function, weight and growth were evaluated in an experimental model of acute and subchronic exposure with mercury. Forty wistar rats were divided into four groups: control, acute, subchronic2 (SB2) and subchronic3 (SB3). Measurements of total mercury (HgT), growth hormone (GH), glucose, ALT and AST enzyme activities, body weight and length of animals were measured in all groups. The results demonstrated that the dose of 25mg/kg was lethal for all animals in this group. The concentrations of mercury measured in the hair’sfrom the SB2 and SB3 groups were significantly higher than in the control group. GH levels were elevated in the acute group and reduced in the subchronic groups. The reduction of glycemia in the subchronic groups was highly significant in relation to the control group (p <0.01). The ALT and AST enzyme activities were altered. These results suggest that methylmercury high doses administered is hepatotoxic, able of to compromise glycemic control and to promote significant alterations in GH levels, which may interfere in the growth of the animals. However, other studies are required to understand the alterations found.Item Acesso aberto (Open Access) Estado nutricional e desenvolvimento motor de crianças ribeirinhas expostas ao mercúrio no estado do Pará - Amazônia brasileira(Universidade Federal do Pará, 2014-11-26) LIMA, Antônio César Matias de; PINHEIRO, Maria da Conceição Nascimento; http://lattes.cnpq.br/6353829454533268Several studies have shown that riverside children from Amazon are exposed to mercury at levels that can be harm to the development. Although, no previous study evaluated the consequences of exposure to the neurodevelopment of this population. The methods used did not take into account the different interfering factors in the child development. We aim to assess the children's motor development and its relation to mercury exposure, nutritional status and socioeconomic profile of the families of local children in two different geographic regions of Pará, Tapajós river basin (São Luiz do Tapajós and Barreiras communities) and Tocantins river basin (Furo do Maracujá community). The demographic and socioeconomic information of families were obtained through the ABEP socioeconomic questionnaire, 2012. For the analysis of anthropometric measurements the WHO AnthroPlus v 1.0.2 software was used (for children above 5 years). Hair sample were used to quantify the total Hg analysis by atomic absorption spectrophotometry. To analyze the children development was used the Test of Gross Motor Development - Second Edition (TGMD-2) Ulrich (2000). The mercury exposure levels of children in the Tapajos were significantly higher than the children from Tocantins. In all schoolchildren groups the social status were categorized as very poor. Children from São Luiz do Tapajós had higher frequency of underweight and stunting than the other children population. In the overall assessment, Barreiras community showed better performance in manipulative skills, locomotor and gross motor coefficient than the others. There was no difference between the children of São Luiz do Tapajós and Furo do Maracujá that had the worst performers. There was no difference between the children from São Luiz do Tapajós and Furo Maracujá. The correlation between the total Hg and motor development markers was observed in Barreiras, while between body mass index and developing markers were observed in the Furo do Maracujá and Barreiras. These results suggest the influence of mercury on the motor development of school, alone and in association with nutritional factors. The TGMD2 is a viable technique in the evaluation of riparian school engine development and may be recommended for other groups of children with similar socioeconomic conditions for this study.Item Acesso aberto (Open Access) Exposição ao mercúrio e desenvolvimento motor de crianças quilombolas na região do Baixo Amazonas(Universidade Federal do Pará, 2014) TAKANASHI, Silvania Yukiko Lins; PINHEIRO, Maria da Conceição Nascimento; http://lattes.cnpq.br/6353829454533268In the Amazon region, exposure to mercury (Hg) can be considered as chronic, with the main study areas located in areas with a history of gold mining activities, one of the sources of this metal. Recently it has been assigned the release from biomass and soil during the burning of forest and ferralsols with significant amounts of Hg. The confirmation of the presence of Hg in humans and fish and the consequences of this metal’s exposure, as documented in the literature, lead to concern about the health of the exposed population. The quilombolas, one of the traditional populations of the lower Amazon region, have a strong bond to the environment occupied by them, and also have the fish as a diet option and as their livelihood, which raises on them the possibility of Hg’s exposure, reason for increase them in this research, that aimed to evaluate the mercury’s exposure of children and the interference on quilombolas motor development. 279 children participated in the study, inhabitants in nine communities itemized as lowland areas (Saracura, Arapemã, Nova Vista do Ituqui, São José and São Raimundo do Ituqui) and plateau (Bom Jardim, Tiningu, Murumuru, Murumurutuba). Evaluation of capillary samples showed total mercury values (THg) 0,03 to 14,94 μg/g, with the lowland’s children presenting a higher Hg exposure, comparing with children from the plateau region (p-value=0,011). A statistically significant correlation of THg values with age (p-value=0,010) and males (p-value =0,001) was identified. The frequency of diet based on fish, high in the communities, showed statistical correlation with THg levels of children. The investigation of motor development, conducted by Motor Development Scale (MDS) proposed by Rosa Neto (2002), showed no statistically average difference in the results for the General Motor Quotient (GMQ) between children from the control group, with THg below 2μg/g, and research group, with THg above 2μg/g. Considering the motricity evaluation, It was observed a statistically significant difference: A normal high result for motricity among the groups (p-value <0,001), with the control group showing better results; At the normal high results of body schema (p-value=0,034), with the control group showing the best results; At the result very bottom for time organization (p-value=0,004) for the study group and normal low result, with higher frequency in the control group (p-value=0,003). In relation to anthropometric measurements, It was found that there was statistical difference in weight results in the study group (p-value=0,012) and children with short stature (p-value=0,001), with worse results of MDS. Considering the investigation of intestinal parasites, anemia and socioeconomic classification, other interfering likely child development in this population, revealed statistically significant differences of EDM to the occurrence of anemia only (p-value=0,041). The quilombolas children are exposed to Hg, although do not live near mining areas. The orientation on conscious based diet on fish was performed, however, this population should be monitored, as Hg may continue to progressively affecting their development.Item Acesso aberto (Open Access) Hormônios tireoidianos, anti-TPO e concentrações de mercúrio total na avaliação da disfunção glandular em população ribeirinha da Amazônia(Universidade Federal do Pará, 2015) OIKAWA, Teiichi; PINHEIRO, Maria da Conceição Nascimento; http://lattes.cnpq.br/6353829454533268There is evidence that mercury accumulation in the thyroid can cause endocrine and immune disorders. Riverside populations of the Amazon with a history of prolonged exposure to mercury have been investigated for neurological damage, but little is known about the hormonal disorders and specific immune thyroid. The objective of this study is to verify the existence of association between the total mercury concentrations in hair samples and concentrations of thyroid hormones and the anti-TPO antibody. The study included 86 riverine from Tapajos region mercury exposed to long-term. Participated this study men and women aged between 14 and 54 years, residents in place for more than five years. Measurements of serum hormone concentrations (TSH, T3 and free T4) and Anti-TPO titles were taken by enzyme immunoassay. Total mercury (THg) in hair samples was measured by atomic absorption spectrophotometry by cold vapor technique. Hormonal dysfunction occurred in 10.3% with an increase of T3, 2.3% with a reduction of T4L, 3.4% decrease in TSH and 4.6% with increased TSH expressed that the maximum value of 8.9 μU/m. Anti-TPO titles were normal in all participants. There was no correlation of hormonal markers (TSH, T3 and T4L) or the Anti-TPO with mercury levels. The results showed that THg concentrations in hair, serum TSH and anti-TPO titles were not influenced by sex; that hormonal changes in thyroid studied riparian not associated with the levels of THg suggesting the interference of protector factors on thyroid function.