Protein metabolism during lactation

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Protein metabolism during lactation.

Lactation increases considerably the demand for amino acids over that required for basal needs. The demand imposed varies with the quantity of milk produced and, between species, with the protein content of milk. Using data on milk composition from Blaxter (1989) and assuming milk production of 60, 1000 and 50 000 ml/d for a rat, human subject and dairy cow respectively, the ideal protein requi...

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Protein metabolism in the mouse during pregnancy and lactation.

Protein synthesis was measured in vivo in the whole body and in a number of individual tissues in mice at various stages of pregnancy and lactation. The absolute rate of protein synthesis in the whole body increased from 640 mg/day in virgin mice to 1590 mg/day by day 18 of pregnancy, and to 2100 mg/day by day 15 of lactation. Large proportions of these increments were contributed by the rapidl...

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Low-Protein Diet during Lactation and Maternal Metabolism in Rats

Some metabolic alterations were evaluated in Wistar rats which received control or low-protein (17%; 6%) diets, from the pregnancy until the end of lactation: control non-lactating (CNL), lactating (CL), low-protein non-lactating (LPNL) and lactating (LPL) groups. Despite the increased food intake by LPL dams, both LP groups reduced protein intake and final body mass was lower in LPL. Higher se...

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Iron metabolism during lactation in the rabbit.

I . Iron metabolism was studied during lactation in the rabbit by the intravenous injection of 59Fe in order to measure plasma Fe turnover, Fe transfer to the milk and Fe absorption by the suckling young. 2. Although the plasma and red cell volumes were elevated in the lactating animal a significant increase of plasma Fe turnover was not demonstrated. 3 . Between 2.5 and 11.5 yo of the injected...

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Regulation of metabolism during lactation in the rat.

The physiological, endocrine and biochemical alterations which occur in the lactating rat to allow direction of the nutrients (glucose, amino acids, non-esterified fatty acids, triacylglycerols) to the lactating gland are described. In addition, the short-term changes in the rate of synthesis of milk constituents and the mechanisms whereby they occur are discussed.

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ژورنال

عنوان ژورنال: Proceedings of the Nutrition Society

سال: 1997

ISSN: 0029-6651,1475-2719

DOI: 10.1079/pns19970019