Effect of the route of nutrition and l-alanyl-l-glutamine supplementation in amino acids’ concentration in trauma patients
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Our purpose was to assess the amino acids’ (AAs) profile in trauma patients and to assess the effect of the route of nutrition and the exogenous ALA-GLN dipeptide supplementation on plasma AAs’ concentration.
This is a secondary analysis of a previous randomized controlled trial. On day 1 and day 6 after trauma, plasma concentration of 25 AAs was measured using reverse phase high-performance liquid chromatography. Results were analyzed in relation to the route of nutrition and supplementation of ALA-GLN dipeptide. Differences between plasma AAs’ concentrations at day 1 and day 6 were evaluated using the Student’s t test or Mann–Whitney–Wilcoxon test. One-way ANOVA and the Kruskal–Wallis test were used to compare groups. A two-sided p value less than 0.05 was considered statistically significant.
Ninety-eight patients were analyzed. Mean plasma concentrations at day 1 were close to the lower normal level for most AAs. At day 6 we found an increase in the eight essential AAs’ concentrations and in 9 out of 17 measured non-essential AAs. At day 6 we found no differences in plasma concentrations for the sum of all AAs (p = .72), glutamine (p = .31) and arginine (p = .23) distributed by the route of nutrition. Administration of ALA-GLN dipeptide increased the plasma concentration of alanine (p = .004), glutamine (p < .001) and citrulline (p = .006).
We found an early depletion of plasma AAs’ concentration which partially recovered at day 6, which was unaffected by the route of nutrition. ALA-GLN dipeptide supplementation produced a small increase in plasma levels of glutamine and citrulline.
KeywordsAmino acids Severe trauma Glutamine Nutrition
Compliance with ethical standards
Conflict of interest
Llompart-Pou JA, Raurich JM, Buño Soto A, Frontera G, Pérez-Bárcena J declare no conflict of interest. García-de-Lorenzo A and Marsé P declare having received speaking honoraria from Fresenius Kabi.
The study was supported by a grant from the Ministerio de Sanidad y Consumo of Spain.
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