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Effect of a leucine-supplemented diet on body composition changes in pregnant rats bearing Walker 256 tumor BJMBR
Ventrucci,G.; Mello,M.A.R.; Gomes-Marcondes,M.C.C..
Cancer patients present high mobilization of host protein, with a decrease in lean body mass and body fat depletion occurring in parallel to neoplastic growth. Since leucine is one of the principal amino acids used by skeletal muscle for energy, we investigated the changes in body composition of pregnant tumor-bearing rats after a leucine-supplemented diet. Sixty pregnant Wistar rats divided into six groups were fed a normal protein diet (18%, N) or a leucine-supplemented diet (3% L-leucine, L). The pregnant groups were: control (CN), Walker 256 carcinoma-bearing rats (WN), control rats pair-fed with tumor-bearing rats (pfN), leucine-supplemented (CL), leucine-supplemented tumor-bearing (WL), and leucine-supplemented rats pair-fed with tumor-bearing rats...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Walker 256 tumor; Pregnancy; Body composition; Leucine; Carcass nitrogen; Diet supplementation.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000300006
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A leucine-supplemented diet improved protein content of skeletal muscle in young tumor-bearing rats BJMBR
Gomes-Marcondes,M.C.C.; Ventrucci,G.; Toledo,M.T.; Cury,L.; Cooper,J.C..
Cancer cachexia induces host protein wastage but the mechanisms are poorly understood. Branched-chain amino acids play a regulatory role in the modulation of both protein synthesis and degradation in host tissues. Leucine, an important amino acid in skeletal muscle, is higher oxidized in tumor-bearing animals. A leucine-supplemented diet was used to analyze the effects of Walker 256 tumor growth on body composition in young weanling Wistar rats divided into two main dietary groups: normal diet (N, 18% protein) and leucine-rich diet (L, 15% protein plus 3% leucine), which were further subdivided into control (N or L) or tumor-bearing (W or LW) subgroups. After 12 days, the animals were sacrificed and their carcass analyzed. The tumor-bearing groups showed a...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Leucine; Amino acid; Walker 256 carcinosarcoma; Body composition; Skeletal muscle protein.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001100017
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