Navegando por Palavras-chave "ferro na dieta"

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    Absorção do ferro da fórmula para lactentes e do leite de vaca fortificado: modelo experimental em ratos recém-desmamados
    (Sociedade Brasileira de Pediatria, 2009-10-01) Costa, Mariana de Lima [UNIFESP]; Freitas, Karine de Cássia [UNIFESP]; Amancio, Olga Maria Silverio [UNIFESP]; Paes, Ângela T. [UNIFESP]; Silva, Sylvia Maria Affonso [UNIFESP]; Luz, Jacqueline [UNIFESP]; Morais, Mauro Batista de [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE: To compare iron absorption from infant formula and iron-fortified cow's milk. METHODS: Twenty-four weanling Wistar rats were maintained in metabolic cages during the whole experiment (10 days). On the first day, the animals were divided into three similar groups according to their weight, length, hematocrit and hemoglobin levels: 1) infant formula; 2) powdered whole cow's milk fortified with iron in the same quantity and type as the formula; 3) control - powdered whole cow's milk not fortified with iron. Deionized water and diet were offered ad libitum, and the volume consumed was measured. Weight, hematocrit, and hemoglobin levels were measured on the fifth and 10th days when length, fecal occult blood, and hepatic iron levels were also analyzed. RESULTS: Group 1 consumed less diet (450.5±26.50 mL) than group 2 (658.8±53.73 mL) and control group (532.7±19.06 mL, p < 0.001). Hemoglobin levels were higher (p < 0.001) in group 1 (12.1±1.13 g/dL) than in group 2 (9.6±1.59 g/dL) and in control group (6.2±0.97 g/dL). Hepatic iron level showed the same pattern as hemoglobin (p < 0.001). There was no difference in weight and length between the three groups (p = 0.342). There was no fecal occult blood in the any of the animals. CONCLUSIONS: Despite the lower volume consumed, the group that received formula presented higher iron absorption and hemoglobin levels than the group fed with fortified whole cow's milk. Growth was similar in the three groups.
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    Deficiência de ferro nas afecções gastrointestinais da criança
    (Associação Brasileira de Hematologia e Hemoterapia e Terapia Celular, 2010-06-01) Morais, Mauro Batista de [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    The relationships between iron deficiency, iron metabolism and the intestinal tract function can be analyzed from various perspectives: 1. the intestine as the site of iron absorption regulated by hepcidin produced in the liver; 2. the interaction between iron with other nutrients; 3. repercussions of iron deficiency in the intestine and 4. the intestine as the location of pathological loses that can cause or aggravate iron deficiency. The aim of this article is to cover these aspects of the interaction between iron and the intestinal tract. In iron deficiency, an increase in iron absorption has been observed, which in animals is accompanied by an increase in the height of the intestinal villosities. On the other hand, in humans with iron deficiency anemia, abnormalities of the intestinal physiology, different to those found in the laboratory, can occur. Poor intestinal iron absorption can occur in illnesses such as atrophy of the villosities as occurs in celiac disease and in illnesses associated with inflammation anemia such as cholestatic hepatic diseases. Nowadays blood loses from intestinal parasitosis are not a frequent cause of iron deficiency. Infants who have a high risk of developing iron deficiency anemia should be exclusively breast feed and a supplement of iron must be started from their sixth month of life. The use of cow milk is associated with lower iron absorption and blood loses that can aggravate iron deficiency. Infants who do not receive maternal milk must be fed with an infant formula fortified with iron.