The effect of glutamine infusion on the inflammatory response and HSP70 during human experimental endotoxaemia.

Abstract:

INTRODUCTION:Glutamine supplementation has beneficial effects on morbidity and mortality in critically ill patients, possibly in part through an attenuation of the proinflammatory cytokine response and a stimulation of heat shock protein (HSP)70. We infused either alanine-glutamine or saline during endotoxin challenge and measured plasma cytokines and HSP70 protein expression. METHODS:This crossover study, conducted in eight healthy young men, was double-blind, randomized and placebo-controlled. It was performed on 2 trial days, separated by a 4-week washout period. The volunteers received an infusion of alanine-glutamine at a rate of 0.025 g/(kg body weight x hour) or saline for 10 hours. After 2 hours, an intravenous bolus of Escherichia coli endotoxin (0.3 ng/kg) was administered. Blood samples were collected hourly for the following 8 hours. HSP70 protein content in isolated blood mononuclear cells (BMNCs) was measured by Western blotting. RESULTS:Plasma glutamine increased during alanine-glutamine infusion. Endotoxin reduced plasma glutamine during both trials, but plasma glutamine levels remained above baseline with alanine-glutamine supplementation. Endotoxin injection was associated with alterations in white blood cell and differential counts, tumour necrosis factor-alpha, IL-6, temperature and heart rate, but glutamine affected neither the endotoxin-induced change in these variables nor the expression of HSP70 in BMNCs. CONCLUSIONS:Endotoxin reduced plasma glutamine independently of alanine-glutamine infusion, but supplementation allows plasma levels to be maintained above baseline. Glutamine alters neither endotoxin-induced systemic inflammation nor early expression of HSP70 in BMNCs. TRIAL REGISTRATION:ClinicalTrials.gov ID: NCT 00780520.

journal_name

Crit Care

authors

Andreasen AS,Pedersen-Skovsgaard T,Mortensen OH,van Hall G,Moseley PL,Pedersen BK

doi

10.1186/cc7696

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

R7

issue

1

eissn

1364-8535

issn

1466-609X

pii

cc7696

journal_volume

13

pub_type

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