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Alterations in lipid metabolism due to a protein-restricted diet in rats during gestation and/or lactation.
Food & Function 2017 November 4
Perinatal malnutrition affects not only fetal and neonatal growth, but also the health of offspring in adulthood, as suggested by the concept of metabolic programming. The impact of maternal protein malnutrition on the metabolism of offspring is demonstrated with the current data. One group of pregnant/lactating female rats was fed with an isocaloric diet having normal protein content. Three other groups were provided 50% of this protein level during pregnancy and/or lactation. The growth and metabolic state of the offspring was monitored. The expression of genes regulating lipid metabolism was determined, including SREBP-1c and SIRT-1 in liver and retroperitoneal adipose tissue. Blood cholesterol and triglycerides were higher in the adult offspring (at 110 days of age) fed a protein-restricted diet than in the adult offspring fed a normal diet. Protein restriction likely leads to inadequate detection of glucose levels, as suggested by the reduced expression of the gene for GCK, the sensor of glucose in the liver. The effects of a protein-restricted diet were highly dependent on the window in which this limitation occurred. There was a more adverse effect when the rats underwent protein restriction during gestation than lactation, leading to lower body weight and alterations in lipid metabolism in adult offspring.
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