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pubmed-article:3295317pubmed:abstractTextBranched chain amino acids (BCAA) improve nitrogen balance and end-organ function in surgical patients, but are untested in marrow transplant recipients. We compared nitrogen balance, urinary 3-methylhistidine-to-creatinine ratio, upper arm anthropometry, serum prealbumin, and day to peripheral engraftment in a randomized, double-blinded trial between 45% (high-leucine) and 23% BCAA intravenous solutions in 40 adult leukemia patients for 1 month following allogeneic marrow transplantation. Nutritional support, provided at approximately 30 nonprotein calories/kg and 0.21 g nitrogen/kg ideal weight, did not differ between groups. Despite greater nitrogen loss and muscle breakdown evidenced by increased 3-methylhistidine-to-creatinine ratio and loss of arm muscle area by study end in the 45% BCAA, no statistical differences were observed when nitrogen balance was compared by week and within stress level as defined by organ and infectious complications. It is likely the patients in the 45% BCAA experienced greater metabolic stress by study end. Serum prealbumin and day posttransplant to peripheral engraftment also did not differ between groups. The chances (power) of this study exceeded 85% in detecting a difference in nitrogen balance of 2.5 g during study week 1 and 4.0 g during week 2. The power during week 3 was 77% for detecting a difference of 4.0 g, and it is unlikely that the true difference exceeds this magnitude. Thus, we did not find any evidence that intravenous BCAA-enriched solutions improved nitrogen balance during the first month after marrow transplantation.lld:pubmed
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pubmed-article:3295317pubmed:articleTitleIntravenous branched chain amino acid trial in marrow transplant recipients.lld:pubmed
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