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pubmed-article:15522127pubmed:abstractTextThe present study compared leucine kinetics and acute-phase-protein concentrations in three groups of marasmic, acutely infected Malawian children fed one of three isoenergetic diets. These were: an enhanced-protein-quality diet (egg-white+tryptophan, providing 1.2 g protein/kg per d; n 14); an increased-protein-content diet (egg-white+tryptophan, providing 1.8 g protein/kg per d; n 14); a standard-protein diet (1.2 g milk protein/kg per d; n 25). The hypotheses tested were that children receiving a diet with more protein would have greater rates of non-oxidative leucine disposal and that children receiving an isonitrogenous diet with a higher protein quality would have lower rates of leucine oxidation. The children were studied after 24 h of therapy using standard [(13)C]leucine stable-isotope tracer techniques. The children receiving the higher-protein-content diet had greater leucine kinetic rates than those receiving the standard-protein-content diet; non-oxidative leucine disposal was 170 (sd 52) v. 122 (sd 30) mumol leucine/kg per h (P<0.01). Leucine oxidation was less in the children receiving the enhanced-protein-quality diet than in those receiving the standard-protein-quality diet; 34 (sd 12) v. 45 (sd 13) mumol leucine/kg per h (P<0.05). The children receiving the high-protein-content diet increased their serum concentration for five of six acute-phase proteins 24 h after starting therapy, while those receiving the standard-protein-content diet did not. These data suggest that there was greater whole-body protein synthesis, and a more vigorous acute-phase response associated with the higher-protein-content diet. The clinical benefits associated with a higher protein intake in marasmic, acutely infected children need further study.lld:pubmed
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pubmed-article:15522127pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:15522127pubmed:articleTitleProtein quantity, not protein quality, accelerates whole-body leucine kinetics and the acute-phase response during acute infection in marasmic Malawian children.lld:pubmed
pubmed-article:15522127pubmed:affiliationCollege of Medicine, University of Malawi, Blantyre. manary@kids.wustl.edulld:pubmed
pubmed-article:15522127pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:15522127pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed