Urinary Sulfur Excretion and the Nitrogen/Sulfur Balance Ratio Reveal Nonprotein Sulfur Amino Acid Retention in Piglets
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چکیده
منابع مشابه
Oxoproline kinetics and oxoproline urinary excretion during glycine- or sulfur amino acid-free diets in humans.
L-5-oxoproline (L-5-OP) is an intermediate in glutathione synthesis, possibly limited by cysteine availability. Urinary 5-OP excretion has been proposed as a measure of glycine availability. We investigated whether 5 days of dietary sulfur amino acid (SAA-free) or glycine (Gly-free) restriction affects plasma kinetics of 5-OP and urinary excretion of L- and D-5-OP in 6 healthy men. On day 6, L-...
متن کاملA sulfur amino acid deficiency changes the amino acid composition of body protein in piglets.
Experiments carried out to determine the amino acid requirement in growing animals are often based on the premise that the amino acid composition of body protein is constant. However, there are indications that this assumption may not be correct. The objective of this study was to test the effect of feeding piglets a diet deficient or not in total sulfur amino acids (TSAA; Met + Cys) on nitroge...
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It has been reported that methionine and cystine are capable of accelerating the healing rate of wounds in injured rats to the same extent when present in the diet in equivalent amounts (1). This response was elicited in both the presence and the absence of dietary protein (2). Lysine, tryptophan, and valine do not appear to alter the healing process to a significant degree (3). Because methion...
متن کاملSulfur Metabolism and Sulfur-Containing Amino Acids: I- Molecular Effectors
The biology of the macro-element sulfur (S) is attracting an ever growing attention concerning cell physiology and human health. Sulfur metabolism works at the interplay between genetics and epigenetic as well as in the maintain of cell redox homeostasis. Indeed, unbalanced levels of S compounds in the body are actually under investigation as vulnerability factors and/or indicators of impaired ...
متن کاملVitamin D and urinary amino acid excretion in the rabbit.
There is ample evidence that vitamin D deficiency rickets in man is associated with hyperaminoaciduria (1). Further studies (2) on renal clearance have de monstrated that elevated urinary amino acid excretion results from diminished reabsorption of it by the renal tubular cells. Many attempts (3, 4), however, failed to find aminoaciduria in experimental rachitic animals until GROSE and SCRIBER ...
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ژورنال
عنوان ژورنال: The Journal of Nutrition
سال: 2003
ISSN: 0022-3166,1541-6100
DOI: 10.1093/jn/133.3.766