Avaliação dos níveis de Homocisteína e Cisteína em amostra de crianças do município de Santo André e sua relação com variáveis antropométricas

• Ano de defesa: 2009
• Autor(a) principal: Leite, Narjara Pereira [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Circunferência abdominal; Cisteína; Crianças; Homocisteína
• Link de acesso: http://repositorio.unifesp.br/handle/11600/9111

Introduction: Homocysteine (Hcy) and cysteine amino acids are intermediates in the metabolism of methionine. The literature has shown that dietary factors, such as vitamin deficiencies, are some of the factors that can alter the levels of homocysteine and cysteine. Recent studies, particularly in adults, report that rising levels of these amino acids is on the list of factors associated with cardiovascular disease (CVD). Objectives: To evaluate plasma levels of homocysteine and cysteine in a sample of schoolchildren from the city of Santo André, Brazil and relate them to: levels of vitamins (folic acid and B12) and anthropometric variables (weight, height and waist circumference). Results: We evaluated 708 children, pre-pubertal children enrolled in public school in the municipality of Santo André. Were adopted as inadequate values above the 90th percentile (increased) for Hcy and cysteine, corresponding to 7.33 mmol / L and 445.0 mmol / L, respectively. For folic acid and vitamin B12 was adopted below the 10th percentile as inadequate (low), which were 9.1 ng / dL and 346pg/dL, respectively. In multivariate analysis for Hcy observed that children with increased waist circumference, are 2,34 times more likely to have increased levels of Hcy. It was found that children with increased waist circumference, even the well-nourished, have 2,34 times more likely to produce high levels of Hcy. With respect to cysteine, it was observed that children with high waist circumference had 2 times greater chance of having cysteine inadequate, and that for each year of age of children increases by 41% the chance of having inadequate cysteine. Conclusion: This study showed for the first time in literature, the association between abdominal obesity and elevated levels of homocysteine and cysteine, in very young children, regardless of nutritional status. However, no significant correlation between Hcy and cysteine with possible deficiencies of folic acid and vitamin B12.