Abstract
Objective
Low monocyte human leukocyte antigen-DR (HLA-DR) expression has been reported to be an indicator of poor survival in critically ill septic patients. We assessed its usefulness as a prognostic indicator in order to identify possible interventions to normalise HLA-DR expression in those patients with lowered monocyte HLA-DR.
Design
HLA-DR expression was measured on separated monocytes of septic patients, using flow cytometry, and HLA-DR upregulation was measured by the same techniques after ex vivo stimulation with granulocyte macrophage colony stimulating factor (GM-CSF). APACHE II score, age, sex and outcome were determined for all patients.
Setting
A single-centre study at the Royal Liverpool University Hospital in a medico-surgical 13-bed intensive care unit.
Patients and participants
All septic patients (n=70) fulfilling the criteria of the ACCP for the diagnosis of sepsis were recruited for the study with informed consent from day 1 of diagnosis of sepsis and monocyte HLA-DR expression measured on 3 consecutive days. Patients were excluded from the study if they were on immunosuppressive therapy. Normal healthy volunteers (n=45) were included.
Results
Low monocyte surface expression and median fluorescence density HLA-DR expression was not associated with a high mortality. High APACHE II scores were not correlated with low HLA-DR expression. However, in those patients where HLA-DR expression was lowered, this could be restored ex vivo by GM-CSF.
Conclusions
In the group of septic patients under study, HLA-DR was not a useful prognostic marker of outcome. We did not find a higher mortality in the group of patients who had low expression. These findings are contradictory to some previously reported findings, and the possible reasons are discussed.
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Acknowledgements
We would like to thank Bio Products Laboratory (BPL) and the Royal Liverpool and Broadgreen University Hospital NHS Trust (RLUHT) and acknowledge their financial support of this study, project number 1576. We would also like to thank Dr. Clive Dash, Medical Director of BPL, for his help and support, the staff of the ICU at the RLUHT, in particular the research nurses Neal Gratton and Andrea Fazakerley for recruiting patients into the study, and Mr. Steve Taylor, University of Liverpool, for the statistical advice throughout the study.
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An editorial regarding this article can be found in the same issue (http://dx.doi.org/10.1007/s00134-003-1820-1)
Presented in part to the European Society of Intensive Care Medicine, Geneva, (poster symposium, September 2001) and the British Society of Immunology, Harrogate, UK (poster, December 2001)
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Perry, S.E., Mostafa, S.M., Wenstone, R. et al. Is low monocyte HLA-DR expression helpful to predict outcome in severe sepsis?. Intensive Care Med 29, 1245–1252 (2003). https://doi.org/10.1007/s00134-003-1686-2
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DOI: https://doi.org/10.1007/s00134-003-1686-2