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 20 April 2018

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Protein and energy metabolism in children with Crohn's disease

June's issue of Inflammatory Bowel Diseases investigates the protein and energy metabolism response to the initial dose of infliximab in children with Crohn's disease.

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Tumor necrosis factor-α (TNF- α) may contribute to the alterations in protein and energy metabolism present in children with Crohn's disease (CD), who frequently suffer from growth disturbance.

Dr Steven J. Steiner and colleagues from Indiana hypothesized that anti-TNF- α therapy would reduce protein losses, due to decreased proteolysis and increased protein synthesis, and that anti-TNF- α therapy would decrease resting energy expenditure.

Children with active CD underwent metabolic assessment immediately before and 2 weeks following initial infliximab infusion.

Parenteral nutrition improves protein metabolism.
Inflammatory Bowel Diseases

Using the stable isotopes [d5] phenylalanine and [1-13C] leucine, 2 independent measures of protein metabolism were determined during fasting and in response to parenteral nutrition.

Energy expenditure, determined by indirect calorimetry, was measured in fasting and parenterally fed states.

15 children completed the study. Following infliximab therapy, significant reductions in proteolysis (P < 0.05) were noted in the fasting state (8%-11%) and during parenteral nutrition infusion (10%-12%).

Phenylalanine utilization for protein synthesis decreased significantly (8%-13%) following infliximab (P < 0.05).

Protein balance was not significantly altered and no significant changes in energy expenditure were observed following infliximab in fasting or parenterally fed states.

Supplementation with parenteral nutrition resulted in significantly decreased proteolysis (8%-21%; P < 0.05), increased protein synthesis (37%-45%; P < 0.01), and improved protein balance (P < 0.01) compared to the fasting state.

Dr Steiner found that supplementation with parenteral nutrition resulted in significant improvements in protein metabolism compared to the fasting state both before and after infliximab therapy.

Inflammatory Bowel Diseases 2007; 13 (6), 737 - 744
04 June 2007

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