Nuous data, and Pearson Chi-square test for categorical variables. Then, pairwise comparisons Lecirelin web between 3 groups (healthy, SIRS, Sepsis) were carried out using the KruskalWallis post oc methods for multiple comparisons adjusted by step-up Simes method [28] (Methods S1). The Mann-Whitney U test was used when two groups were just compared. Correlations were assessed by the Spearman correlation test. Data were expressed as median [IQR] or as counts ( ), as required. A pvalue (two-tailed) threshold of 0.05 was considered statistically significant.Methods Study DesignThis 11967625 prospective cohort study was conducted in the medical ICU of Assistance Publique – Hopitaux de Marseille University ^ Hospital (France). The study was approved by the SudMediterranee V Ethics Committee and written informed consent ??was obtained from all Tramiprosate web patients or, according to French law, from 25331948 their proxies when patients were not able to understand. The study, which one goal was to evaluate NK cell status before cytomegalovirus reactivation during the ICU stay (Methods S1), included a factorial study that is presented herein. The principal aim was the quantitative and qualitative monitoring of NK cells status in the early phase of critically-ill septic patients in comparison to healthy controls as well as patients with severe non-septic SIRS. Secondary aims included comparison between severe sepsis and septic shock. Potential explanatory factors for observed modifications (circulating cytokines levels, NK activating/inhibiting receptors surface expression) were also investigated as an exploratory part of this study. During a 2-year period, all consecutive patients meeting inclusion criteria were eligible. Inclusion criteria included being aged .18 years and the absence of any immunodeficiency prior to ICU admission (Methods S1). All enrolled patients had blood samples drawn within the first 48 h of ICU admission. Lymphocyte subset counts (CD3+, CD4+, CD8+, CD19+,CD56+, CD16+, HLA-DR+) were first performed using flow cytometry on fresh whole-blood samples. Then, peripheral blood mononuclear cells (PBMCs) were isolated by Ficoll ypaque density gradient centrifugation (Eurobio, Courtaboeuf, France), counted, and stored in liquid nitrogen vapor. Serum was frozen at ?0uC. The constitution of patients groups was done as follows. First, to avoid any influence of CMV status on NK-cell phenotype, we selected from the whole cohort patients with CMV seropositivity at admission [26]. Then, we constituted different groups: those with sepsis (referred to thereafter as “Sepsis group”), including those with septic shock and those with severe sepsis, and those withResults Demographic and Clinical Characteristics of the Study PopulationFrom the patients enrolled during the study period, 42 who corresponded to the predefined criteria were selected to constitute the groups: 29 patients in the Sepsis group (including 15 with septic shock and 14 with severe sepsis) and 13 patients in the SIRS group. The times between ICU admission and sampling were similar between all groups (Table 1). Sepsis and SIRS groups were comparable for characteristics on admission. As expected, the severity on admission as well as the proportion of patients receiving mechanical ventilation or meeting ARDS criteria were significantly increased in patients with septic shock compared to those with severe sepsis (Table 1). Groups also showed differences concerning outcomes, with a trend towards higher morbidity and morta.Nuous data, and Pearson Chi-square test for categorical variables. Then, pairwise comparisons between 3 groups (healthy, SIRS, Sepsis) were carried out using the KruskalWallis post oc methods for multiple comparisons adjusted by step-up Simes method [28] (Methods S1). The Mann-Whitney U test was used when two groups were just compared. Correlations were assessed by the Spearman correlation test. Data were expressed as median [IQR] or as counts ( ), as required. A pvalue (two-tailed) threshold of 0.05 was considered statistically significant.Methods Study DesignThis 11967625 prospective cohort study was conducted in the medical ICU of Assistance Publique – Hopitaux de Marseille University ^ Hospital (France). The study was approved by the SudMediterranee V Ethics Committee and written informed consent ??was obtained from all patients or, according to French law, from 25331948 their proxies when patients were not able to understand. The study, which one goal was to evaluate NK cell status before cytomegalovirus reactivation during the ICU stay (Methods S1), included a factorial study that is presented herein. The principal aim was the quantitative and qualitative monitoring of NK cells status in the early phase of critically-ill septic patients in comparison to healthy controls as well as patients with severe non-septic SIRS. Secondary aims included comparison between severe sepsis and septic shock. Potential explanatory factors for observed modifications (circulating cytokines levels, NK activating/inhibiting receptors surface expression) were also investigated as an exploratory part of this study. During a 2-year period, all consecutive patients meeting inclusion criteria were eligible. Inclusion criteria included being aged .18 years and the absence of any immunodeficiency prior to ICU admission (Methods S1). All enrolled patients had blood samples drawn within the first 48 h of ICU admission. Lymphocyte subset counts (CD3+, CD4+, CD8+, CD19+,CD56+, CD16+, HLA-DR+) were first performed using flow cytometry on fresh whole-blood samples. Then, peripheral blood mononuclear cells (PBMCs) were isolated by Ficoll ypaque density gradient centrifugation (Eurobio, Courtaboeuf, France), counted, and stored in liquid nitrogen vapor. Serum was frozen at ?0uC. The constitution of patients groups was done as follows. First, to avoid any influence of CMV status on NK-cell phenotype, we selected from the whole cohort patients with CMV seropositivity at admission [26]. Then, we constituted different groups: those with sepsis (referred to thereafter as “Sepsis group”), including those with septic shock and those with severe sepsis, and those withResults Demographic and Clinical Characteristics of the Study PopulationFrom the patients enrolled during the study period, 42 who corresponded to the predefined criteria were selected to constitute the groups: 29 patients in the Sepsis group (including 15 with septic shock and 14 with severe sepsis) and 13 patients in the SIRS group. The times between ICU admission and sampling were similar between all groups (Table 1). Sepsis and SIRS groups were comparable for characteristics on admission. As expected, the severity on admission as well as the proportion of patients receiving mechanical ventilation or meeting ARDS criteria were significantly increased in patients with septic shock compared to those with severe sepsis (Table 1). Groups also showed differences concerning outcomes, with a trend towards higher morbidity and morta.
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