Submitted to: Journal of Federation of American Societies for Experimental Biology
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2008
Publication Date: 4/1/2008
Citation: Sy, J., Gordon, W.E., Verbruggen, S., Wu, M., Castillo, L. 2008. Methionine splanchnic uptake is increased in critically ill children [abstract]. Journal of Federation of American Societies for Experimental Biology. 22:869.27. Interpretive Summary:
Technical Abstract: During critical illness the splanchnic area is profoundly affected. There is no information on splanchnic uptake of amino acids in vivo, in critically ill children. Methionine splanchnic uptake in critically ill children will differ from estimates in healthy adults. We studied 24 critically ill children: 8 infants (age 6+/-3months; wt 6+/-1.4 kg), 8 children (age 5+/-2 y; wt 14+/-3 kg), and 8 adolescents (15+/-1.94 y; wt 63.3+/-21kg), who received continuous enteral feedings, providing protein and energy intake at full maintenance needs. We conducted a simultaneous, intravenous, primed, constant, 9-h tracer infusion of L-[2H3methyl] methionine at 2.5 µmol.kg –1h1 and enteral infusion of L-[13C] methionine at 5µmol.kg–1h1. Plasma methionine fluxes obtained with the enteral 13C and the intravenous 2H3 labels were 85+/-13 and 30+/-8, 71+/-5 and 41+/-15, and 68+/-7 and 35+/-7 µmol.kg–1h–1, respectively for infants, children, and adolescents. First pass disappearance of methionine tracer, respectively, was 63, 43, and 47%. The rates of intestinal methionine oxidation were 24+/-10, 18+/-6, and 23+/-8 µmol.kg–1h1. Methionine splanchnic uptake is higher in critically ill infants when compared to children and adolescents (p<0.05), and higher than values of about 15% reported in healthy adults.