منابع مشابه
Whole body and tissue cholesterol turnover in the baboon.
Cholesterol turnover was studied in four baboons by injecting [14C]cholesterol 186 days and [3H]cholesterol 4 days before necropsy, and fitting a two- or three-pool model to the resulting specific activity-time data. At necropsy, cholesterol mass and specific activity were determined for the total body (minus the central nervous system) and for many tissues. A pool model permits the estimation,...
متن کاملWhole-body protein turnover in the healthy elderly.
We tested the hypothesis that aging affects whole-body protein turnover via altered fat-free mass (FFM). Whole-body protein kinetics were estimated by the 60-h oral [15N]glycine method. Results from 16 healthy, elderly subjects (8 men and 8 women with a mean age of 72.6 y) were compared for age and sex effects with those of 15 lean young subjects (8 men and 7 women with a mean age of 28.4 y) du...
متن کاملLysine requirements and whole-body protein turnover in growing pigs.
The influence on protein accretion and whole-body protein turnover of changing dietary protein quality while maintaining constant energy intake was studied by varying the degree of lysine supplementation of a lysine-deficient barley-based diet given to growing pigs. Measurements of nitrogen metabolism and whole-body protein turnover, using both classical and 15N end-product methods following a ...
متن کاملSkeletal muscle and whole-body protein turnover in cirrhosis.
1. We investigated arteriovenous exchanges of tyrosine and 3-methylhistidine across leg tissue in the postabsorptive state as specific indices of net protein balance and myofibrillar protein breakdown, respectively, in eight patients with cirrhosis and in 11 healthy control subjects. Whole-body protein turnover was also measured using L-[1-13C]leucine. 2. Leg efflux of tyrosine was 45% greater ...
متن کاملWhole body protein turnover in childhood Crohn's disease.
In order to investigate the effects of treatment on protein metabolism in childhood Crohn's disease whole body protein turnover was measured using a primed constant intravenous infusion of L-[1-13C]leucine and mass spectrometry in 10 children with active disease. Mean rates of protein synthesis and breakdown markedly decreased after treatment with steroids (four) or an elemental diet (six). Thi...
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ژورنال
عنوان ژورنال: Nature
سال: 1960
ISSN: 0028-0836,1476-4687
DOI: 10.1038/186398a0