Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis
Introduction. Severe sepsis in humans may be related to an underlying profound immune suppressive state. We investigated the link between gene expression of immune regulatory cytokines and the range of illness severity in patients with infection and severe sepsis. Methods. A prospective observation...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Mediators of Inflammation |
| Online Access: | http://dx.doi.org/10.1155/2013/164246 |
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| author | Robert Grealy Mary White Patrick Stordeur Dermot Kelleher Derek G. Doherty Ross McManus Thomas Ryan |
| author_facet | Robert Grealy Mary White Patrick Stordeur Dermot Kelleher Derek G. Doherty Ross McManus Thomas Ryan |
| author_sort | Robert Grealy |
| collection | DOAJ |
| description | Introduction. Severe sepsis in humans may be related to an underlying profound immune suppressive state. We investigated the link between gene expression of immune regulatory cytokines and the range of illness severity in patients with infection and severe sepsis. Methods. A prospective observational study included 54 ICU patients with severe sepsis, 53 patients with infection without organ failure, and 20 healthy controls. Gene expression in peripheral blood mononuclear cells (PBMC) was measured using real-time polymerase chain reaction. Results. Infection differed from health by decreased expression of the IL2, and IL23 and greater expression of IL10 and IL27. Severe sepsis differed from infection by having decreased IL7, IL23, IFNγ, and TNFα gene expression. An algorithm utilising mRNA copy number for TNFα, IFNγ, IL7, IL10, and IL23 accurately distinguished sepsis from severe sepsis with a receiver operator characteristic value of 0.88. Gene expression was similar with gram-positive and gram-negative infection and was similar following medical and surgical severe sepsis. Severity of organ failure was associated with serum IL6 protein levels but not with any index of cytokine gene expression in PBMCs. Conclusions. Immune regulatory cytokine gene expression in PBMC provides a robust method of modelling patients’ response to infection. |
| format | Article |
| id | doaj-art-78a16d18691d4cbbbe5d5840cd78dd3a |
| institution | OA Journals |
| issn | 0962-9351 1466-1861 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Mediators of Inflammation |
| spelling | doaj-art-78a16d18691d4cbbbe5d5840cd78dd3a2025-08-20T02:07:31ZengWileyMediators of Inflammation0962-93511466-18612013-01-01201310.1155/2013/164246164246Characterising Cytokine Gene Expression Signatures in Patients with Severe SepsisRobert Grealy0Mary White1Patrick Stordeur2Dermot Kelleher3Derek G. Doherty4Ross McManus5Thomas Ryan6Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandDepartment of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandService d’Immunologie, Hôpital Erasme, Brussels, BelgiumDepartment of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandDepartment of Clinical Immunology, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandDepartment of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandDepartment of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St James’s Hospital, Dublin 8, IrelandIntroduction. Severe sepsis in humans may be related to an underlying profound immune suppressive state. We investigated the link between gene expression of immune regulatory cytokines and the range of illness severity in patients with infection and severe sepsis. Methods. A prospective observational study included 54 ICU patients with severe sepsis, 53 patients with infection without organ failure, and 20 healthy controls. Gene expression in peripheral blood mononuclear cells (PBMC) was measured using real-time polymerase chain reaction. Results. Infection differed from health by decreased expression of the IL2, and IL23 and greater expression of IL10 and IL27. Severe sepsis differed from infection by having decreased IL7, IL23, IFNγ, and TNFα gene expression. An algorithm utilising mRNA copy number for TNFα, IFNγ, IL7, IL10, and IL23 accurately distinguished sepsis from severe sepsis with a receiver operator characteristic value of 0.88. Gene expression was similar with gram-positive and gram-negative infection and was similar following medical and surgical severe sepsis. Severity of organ failure was associated with serum IL6 protein levels but not with any index of cytokine gene expression in PBMCs. Conclusions. Immune regulatory cytokine gene expression in PBMC provides a robust method of modelling patients’ response to infection.http://dx.doi.org/10.1155/2013/164246 |
| spellingShingle | Robert Grealy Mary White Patrick Stordeur Dermot Kelleher Derek G. Doherty Ross McManus Thomas Ryan Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis Mediators of Inflammation |
| title | Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis |
| title_full | Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis |
| title_fullStr | Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis |
| title_full_unstemmed | Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis |
| title_short | Characterising Cytokine Gene Expression Signatures in Patients with Severe Sepsis |
| title_sort | characterising cytokine gene expression signatures in patients with severe sepsis |
| url | http://dx.doi.org/10.1155/2013/164246 |
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