Polymorphisms in innate immunity genes predispose to bacteremia and death in the medical intensive care unit*
| Autor: | Rudi Steffensen, Ilse Vanhorebeek, Kaspar René Nielsen, Ilse Milants, Greet Van den Berghe, Kristel Van Steen, Troels Krarup Hansen, Severine Vermeire, Steffen Thiel, Annapaula Giulietti, Lies Langouche, Alexander Wilmer, Liesbet Henckaerts, Chantal Mathieu, Paul Rutgeerts, Pieter Wouters |
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| Rok vydání: | 2009 |
| Předmět: |
Male
medicine.medical_specialty Bacteremia Critical Care and Intensive Care Medicine Polymorphism Single Nucleotide Genetic determinism law.invention Sepsis Immunity law Intensive care Humans Medicine Genetic Predisposition to Disease Intensive care medicine Innate immune system business.industry Septic shock Middle Aged medicine.disease Intensive care unit Immunity Innate Intensive Care Units Female business |
| Zdroj: | Henckaerts, L, Nielsen, K R, Steffensen, R, Van Steen, K, Mathieu, C, Giulietti, A, Wouters, P J, Milants, I, Vanhorebeek, I, Langouche, L, Vermeire, S, Rutgeerts, P, Thiel, S, Wilmer, A, Hansen, T K & Van den Berghe, G 2009, ' Polymorphisms in innate immunity genes predispose to bacteremia and death in the medical intensive care unit ', Critical Care Medicine, vol. 37, no. 1, pp. 192-201, e1-3 . https://doi.org/10.1097/CCM.0b013e31819263d8 |
| ISSN: | 0090-3493 |
| DOI: | 10.1097/ccm.0b013e31819263d8 |
| Popis: | Udgivelsesdato: 2009-Jan OBJECTIVE: Critically ill patients are at risk of sepsis, organ failure, and death. Studying the impact of genetic determinants may improve our understanding of the pathophysiology and allow identification of patients who would benefit from specific treatments. Our aim was to study the influence of single nucleotide polymorphisms in selected genes involved in innate immunity on the development of bacteremia or risk of death in patients admitted to a medical intensive care unit. DESIGN, SETTING, AND PATIENTS: DNA was available from 774 medical intensive care unit patients. We selected 31 single nucleotide polymorphisms in 14 genes involved in host innate immune defense. Serum levels of MASP2 and chemotactic capacity, phagocytosis, and killing capacity of monocytes at admission were quantified. Univariate Kaplan-Meier estimates with log-rank analysis and multivariate logistic regression were performed. Bootstrap resampling technique and ten-fold cross-validation were used to assess replication stability, prognostic importance of the variables, and repeatability of the final regression model. MAIN RESULTS: Patients with at least one NOD2 variant were shown to have a reduced phagocytosis by monocytes (p = 0.03) and a higher risk of bacteremia than wild-type patients (p = 0.02). The NOD2/TLR4 combination was associated with bacteremia using survival analyses (time to bacteremia development, log-rank p < 0.0001), univariate regression (p = 0.0003), and multivariate regression analysis (odds ratio [OR] 4.26, 95% confidence interval [CI] 1.85-9.81; p = 0.0006). Similarly, the same combination was associated with hospital mortality using survival analysis (log-rank p = 0.03), univariate regression (p = 0.02), and multivariate regression analysis (OR 2.27, 95% CI 1.09-4.74; p = 0.03). Also variants in the MASP2 gene were significantly associated with hospital mortality (survival analysis log-rank-p = 0.003; univariate regression p = 0.02; multivariate regression analysis OR 2.35, 95% CI 1.38-3.99; p = 0.002). CONCLUSIONS: Functional polymorphisms in genes involved in innate immunity predispose to severe infections and death, and may become part of a risk model, allowing identification of patients at risk, who could benefit from early introduction of specific preventive or therapeutic interventions. |
| Databáze: | OpenAIRE |
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