Early weaning impairs body composition in male mice

Autor(es)

Borges, Maria Carolina ^[1] ; Rogero, Marcelo Macedo ^[1] ; de Oliveira Pires, Ivanir Santana ^[1] ; Borelli, Primavera ^[2] ; Tirapegui, Julio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Alimentos & Nutr Expt, BR-05508900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Clin & Toxicol Anal, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Pharmaceutical Sciences; v. 45, n. 4, p. 801-807, OCT-DEC 2009.
• Citações Web of Science: 0

Resumo

This study aimed to evaluate the effect of early weaning on body composition and on parameters related to nutritional status in mice. The experimental group consisted of male Swiss Webster mice that were weaned early (at postnatal day fourteen) and fed an appropriate diet for growing rodents until postnatal day twenty-one (EW group). The control group consisted of male mice breastfed until postnatal day twenty-one (CON group). All animals were sacrificed on the twenty-first day of life. The EW group showed a decrease in liver and muscle protein content and concentration, brain protein concentration, brain DNA content and concentration, as well as liver and muscle protein/RNA ratio (p<0.05). Concerning body composition, the EW mice showed increased moisture content, increased moisture and lipid percentage, and a smaller percentage and content of protein and ash in the carcass (p<0.05). These results indicate that early weaning impairs body composition and parameters related to nutritional status, which may be explained by retarded chemical maturation processes. This data may contribute to the overall understanding of the influence of breastfeeding versus feeding with artificial milk on body composition and on nutritional status. (AU)

• Processo FAPESP: 03/01606-8 - Efeito do desmame precoce e da suplementação com L-glutamina sobre a funcionalidade de macrófagos peritoniais de camundongos
• Beneficiário: Julio Orlando Tirapegui Toledo
• Modalidade de apoio: Auxílio à Pesquisa - Regular