Efeito da suplementação de zinco sobre o GH, IGF-1 e IGFBP3 em idosas saudáveis.

• Autor(a) principal: César, Edna Samara Ribeiro
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/4289
• topic: Nutrição - Pessoa idosa; Nutrição - suplementação de zinco; Hormone growth - GH; Senior women; Zinc; CIENCIAS DA SAUDE::NUTRICAO

The aging process involves several physiological changes among them the decrease in anabolic hormones. As a result, more and more researches have been developed in order to improve the quality of life in this population. This research aimed to evaluate the effect of zinc supplementation on serum levels of GH, IGF-1 and IGFBP3 in elderly women. The study included 20 apparently healthy elderly and divided into 2 groups (Supplemented and Placebo). After approval by the Ethics Committee in Research of the Center for Health Sciences UFPB the elderly received 25mg/day of zinc or placebo for 90 days. The parameters were analyzed using the paired Student t test and unpaired GraphPad-Prism software v.5.04. We adopted a significance level of 5% for all tests. It was observed that the values of dietary zinc in both groups showed levels below recommended for the elderly, the control group showed a significant reduction in plasma zinc concentration from the beginning to the end of the experiment, while the supplemented group maintained levels plasma without significant changes in the same period. Zinc supplementation caused a significant increase in the levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) in both groups, but levels remained within the reference values. With regard to hormones zinc supplementation was able to increase the levels of GH and IGFBP3 (p = 0.004 and 0.02, respectively) and tended to increase IGF-1 levels (p = 0.06). It was observed that zinc supplementation produced an increase in serum levels of GH and IGFBP3 tendency to increase IGF-1. Therefore Zinc could be an alternative for increasing GH levels in the elderly without the harmful effects that GH replacement entails.