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Aslami H.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica
Netherlands Journal of Medicine | Year: 2010

Induced hypothermia after cardiopulmonary resuscitation provides organ protection and is currently considered standard of care in clinical practice. An increasing number of reports indicate that induced hypothermia is also beneficial in other conditions of hypoxia-induced organ injury, including brain injury, intestinal ischaemia-reperfusion injury and acute lung injury. The mechanism of the protective effect is thought to be caused by a reduction in metabolism. a hibernation-like state, characterised by hypothermia, bradypnoea and a reduction in metabolic rate, was induced in animals that normally do not hibernate, after inhalation of hydrogen sulphide. this state was termed a 'suspended animation-like state'. In critically ill patients, an exaggerated systemic inflammatory response is common, which often results in multiple organ injury. Inducing a hypometabolic state during critical illness may limit organ injury by reducing oxygen consumption, constituting a fascinating new therapeutic perspective for the treatment of critically ill patients. In this manuscript, we describe mitochondrial dysfunction during critical illness and preclinical data that suggest a potential therapeutic possibility of lowering metabolism. In addition, we discuss issues that warrant further research before clinical applicability. © Van Zuiden Communications B.V. All rights reserved. © Van Zuiden Communications B.V. Source

Oei G.T.M.L,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | Flick M.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | van der Wal A.C.,University of Amsterdam | Hollmann M.W.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | And 2 more authors.
Molecular Medicine | Year: 2014

Helium, a noble gas, has been used safely in humans. In animal models of regional myocardial ischemia/reperfusion (I/R) it was shown that helium conditioning reduces infarct size. Currently, it is not known how helium exerts its cytoprotective effects and which cell death/survival pathways are affected. The objective of this study, therefore, was to investigate the cell protective effects of helium postconditioning by PCR array analysis of genes involved in necrosis, apoptosis and autophagy. Male rats were subjected to 25 min of ischemia and 5, 15 or 30 min of reperfusion. Semiquantitative histological analysis revealed that 15 min of helium postconditioning reduced the extent of I/R-induced cell damage. This effect was not observed after 5 and 30 min of helium postconditioning. Analysis of the differential expression of genes showed that 15 min of helium postconditioning mainly caused upregulation of genes involved in autophagy and inhibition of apoptosis versus I/R alone. The results suggest that the cytoprotective effects of helium inhalation may be caused by a switch from pro-cell-death signaling to activation of cell survival mechanisms, which appears to affect a wide range of pathways. © 2014, Uninversity of Michigan. All rights reserved. Source

Determann R.M.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | El Solh A.A.,State University of New York at Buffalo | Vijfhuizen J.,Gelre Ziekenhuizen | Schultz M.J.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica
Respiratory Medicine | Year: 2010

Background and objective: Conventional methods to establish pleural infection are time-consuming and sometimes inadequate. Biomarkers may aid in making rapid diagnosis of infection. In an observational study we evaluated and compared the diagnostic value of pleural fluid levels of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1), C-reactive protein and procalcitonin in intensive care patients with pleural effusions. Methods: Thirty-six patients with de novo pleural effusions were included and 20 patients with pleural effusions after cardiothoracic surgery and 20 patients with pleural effusions after esophagus surgery acted as controls. Levels of sTREM-1, C-reactive protein and procalcitonin were measured in pleural effusions. Results: Levels of sTREM-1 were highest in empyemas, followed by infectious exudates. Levels of sTREM-1 were low in transudates and non-infectious exudates. C-reactive protein levels were highest in exudates and empyemas, while procalcitonin levels were highest in exudates. Pleural fluid with positive culture results contained higher sTREM-1 and C-reactive protein levels as compared to samples with negative culture results. A cut-off level of 50 pg/ml sTREM-1 yielded a sensitivity of 93% and a specificity of 86%, while these were 87% and 67% respectively for a cut-off value of 7.5 μg/ml C-reactive protein, and 60% and 64% respectively for a cut-off value of 0.15 ng/ml procalcitonin. Conclusion: sTREM-1 is superior to C-reactive protein and procalcitonin in detecting infection. © 2009. Source

Vlaar A.P.J.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | Vlaar A.P.J.,Medical Center Amsterdam | Vlaar A.P.J.,VU University Amsterdam | Cornet A.D.,Laboratory Of Experimental Intensive Care And Anesthesiology Leica | And 26 more authors.
Transfusion | Year: 2012

BACKGROUND: There is an association between blood transfusion and pulmonary complications in cardiac surgery. Mediators of increased pulmonary vascular leakage after transfusion are unknown. We hypothesized that factors may include antibodies or bioactive lipids, which have been implicated in transfusion-related acute lung injury. STUDY DESIGN AND METHODS: We performed a prospective cohort study in two university hospital intensive care units in the Netherlands. Pulmonary vascular permeability was measured in cardiac surgery patients after receiving no, restrictive (one or two transfusions), or multiple (five or more transfusions) transfusions (n = 20 per group). The pulmonary leak index (PLI), using 67Ga-labeled transferrin, was determined within 3 hours postoperatively. Blood products were screened for bioactive lipid accumulation and the presence of antibodies. RESULTS: The PLI was elevated in all groups after cardiac surgery. Transfused patients had a higher PLI compared to nontransfused patients (33 × 10 -3 ± 20 × 10 -3 vs. 23 × 10 -3 ± 11 × 10 -3/min, p < 0.01). The amount of red blood cell (RBC) products, but not of fresh-frozen plasma or platelets, was associated with an increase in PLI (β, 1.6 [0.2-3.0]). Concerning causative factors in the blood product, neither the level of bioactive lipids nor the presence of antibodies was associated with an increase in PLI. Patient factors such as surgery risk and time on cardiopulmonary bypass did not influence the risk of pulmonary leakage after blood transfusion. CONCLUSIONS: Transfusion in cardiothoracic surgery patients is associated with an increase in pulmonary capillary permeability, an effect that was dose dependent for RBC products. The level of bioactive lipids or the presence of HLA or HNA antibodies in the transfused products were not associated with increased pulmonary capillary permeability. © 2011 American Association of Blood Banks. Source

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