Current methods for the hardening step of functional coatings over different materials imply the use of high temperatures, high energy consumption or long periods of time, which have repercussions on ...the speed and cost of the product. We report here a simple and low-cost methodology for the functionalization of low-cost stainless steel, which is modular, depending on the functionality pursued: a levelling layer for smoothing the surface of the material, an "easy to clean" property, or both of them. This research is based on sol-gel coatings cured under UV light without requiring high thermal hardening processes, making it applicable to plastics and other sensible materials and possessing high chemical and thermal stability. The film ensures lower processing costs and higher rates of hardening if adequate medium-pressure lamps are employed. This formulation is also well-defined for scaling up the process, so it is possible to perform a continuous coating in large areas by employing mild processing conditions (low temperature, atmospheric pressure). In addition, the sol-gel solution was fully characterized and studied in order to guarantee a long service life before deposition, with a focus on industrial applications in the domestic sector.
Severe status of coronavirus disease 2019 (COVID-19) is extremely associated to cytokine release. Moreover, it has been suggested that blood group is also associated with the prevalence and severity ...of this disease. However, the relationship between the cytokine profile and blood group remains unclear in COVID-19 patients. In this sense, we prospectively recruited 108 COVID-19 patients between March and April 2020 and divided according to ABO blood group. For the analysis of 45 cytokines, plasma samples were collected in the time of admission to hospital ward or intensive care unit and at the sixth day after hospital admission. The results show that there was a risk of more than two times lower of mechanical ventilation or death in patients with blood group O (log rank:
= 0.042). At first time, all statistically significant cytokine levels, except from hepatocyte growth factor, were higher in O blood group patients meanwhile the second time showed a significant drop, between 20% and 40%. In contrast, A/B/AB group presented a maintenance of cytokine levels during time. Hepatocyte growth factor showed a significant association with intubation or mortality risk in non-O blood group patients (OR: 4.229, 95% CI (2.064-8.665),
< 0.001) and also was the only one bad prognosis biomarker in O blood group patients (OR: 8.852, 95% CI (1.540-50.878),
= 0.015). Therefore, higher cytokine levels in O blood group are associated with a better outcome than A/B/AB group in COVID-19 patients.
Host immunity should play a principal role in determining both the outcome and recovery of patients with sepsis that originated from a microbial infection. Quantification of the levels of key ...elements of the immune response could have a prognostic value in this disease.
In an attempt to evaluate the quantitative changes in the status of immunocompetence in severe sepsis over time and its potential influence on clinical outcome, we monitored the evolution of immunoglobulins (Igs) (IgG, IgA and IgM), complement factors (C3 and C4) and lymphocyte subsets (CD4+ T cells, CD8+ T cells, B cells (CD19+) and natural killer (NK) cells (CD3-CD16+CD56+)) in the blood of 50 patients with severe sepsis or septic shock at day 1, day 3 and day 10 following admission to the ICU.
Twenty-one patients died, ten of whom died within the 72 hours following admission to the ICU. The most frequent cause of death (n = 12) was multiorgan dysfunction syndrome. At day 1, survivors showed significantly higher levels of IgG and C4 than those who ultimately died. On the contrary, NK cell levels were significantly higher in the patients who died. Survivors exhibited a progressive increase from day 1 to day 10 on most of the immunological parameters evaluated (IgG, IgA, IgM, C3, CD4+, CD8+ T cells and NK cells). Multivariate Cox regression analysis, including age, sex, APACHE II score, severe sepsis or septic shock status and each one of the immunological parameters showed that NK cell counts at day 1 were independently associated with increased risk of death at 28 days (hazard ratio = 3.34, 95% CI = 1.29 to 8.64; P = 0.013). Analysis of survival curves provided evidence that levels of NK cells at day 1 (> 83 cells/mm³) were associated with early mortality.
Our results demonstrate the prognostic role of NK cells in severe sepsis and provide evidence for a direct association of early counts of these cells in blood with mortality.
The role of systemic immunity in the pathogenesis of cirrhosis is not fully understood. Analysis of transcriptomic profiles in blood is an easy approach to obtain a wide picture of immune response at ...the systemic level. We studied gene expression profiles in blood from thirty cirrhotic patients and compared them against those of eight healthy volunteers. Most of our patients were male n = 21, 70% in their middle ages 57.4 ± 6.8 yr. Alcohol abuse was the most frequent cause of cirrhosis (n = 22, 73%). Eleven patients had hepatocellular carcinoma (36.7%). Eight patients suffered from hepatitis C virus infection (26.7%). We found a signature constituted by 3402 genes which were differentially expressed in patients compared to controls (2802 over-expressed and 600 under-expressed). Evaluation of this signature evidenced the existence of an active pro-fibrotic transcriptomic program in the cirrhotic patients, involving the extra-cellular matrix (ECM)-receptor interaction & TGF-beta signaling pathways along with the Cell adhesion molecules pathway. This program coexists with alterations in pathways participating in Glycine, serine and threonine metabolism, Phenylalanine metabolism, Tyrosine metabolism, ABC transporters, Purine metabolism, Arachidonic acid metabolism. In consequence, our results evidence the co-existence in blood of a genomic program mediating pro-fibrotic mechanisms and metabolic alterations in advanced cirrhosis. Monitoring expression levels of the genes involved in these programs could be of interest for predicting / monitoring cirrhosis evolution. These genes could constitute therapeutic targets in this disease.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The aim of this study was to investigate the relationship between the CD14 rs2569190 polymorphism and death related to septic shock in white European patients who underwent major cardiac or abdominal ...surgery. We carried out a retrospective study in 205 septic shock patients. The septic shock diagnosis was established by international consensus definitions. The outcome variable was the death within 28, 60 and 90 days after septic shock diagnosis. The CD14 rs2569190 polymorphism was analyzed by Agena Bioscience's MassARRAY platform. For the genetic association analysis with survival was selected a recessive inheritance model (GG vs. AA/AG). One hundred thirteen out of 205 patients (55.1%) died with a survival median of 39 days (95%CI = 30.6; 47.4). Patients with rs2569190 GG genotype had shorter survival probability than rs2569190 AA/AG genotype at 60 days (62.3% vs 50%; p = 0.035), and 90 days (62.3% vs 52.6%; p = 0.046). The rs2569190 GG genotype was associated with increased risk of septic shock-related death in the first 60 days (adjusted hazard ratio (aHR) = 1.67; p = 0.016) and 90 days (aHR = 1.64; p = 0.020) compared to rs2569190 AA/AG genotype. In conclusion, the presence of CD14 rs2569190 GG genotype was associated with death in shock septic patients who underwent major surgery. Further studies with bigger sample size are required to verify this relationship.
IL‐1B rs16944 polymorphism is related to septic shock and death Jiménez‐Sousa, María Ángeles; Medrano, Luz M.; Liu, Pilar ...
European journal of clinical investigation,
January 2017, 2017-Jan, 2017-01-00, 20170101, Letnik:
47, Številka:
1
Journal Article
Recenzirano
Background
IL‐1β is a primary mediator of systemic inflammatory response syndrome (SIRS) and it may lead to shock septic. Our aim was to analyse whether IL‐1B rs16944 polymorphism is associated with ...the onset of septic shock and death after major surgery.
Materials and methods
We performed a case–control study on 467 patients who underwent major cardiac or abdominal surgery. Of them, 205 patients developed septic shock (cases, SS group) and 262 patients developed SIRS (controls, SIRS group). The primary outcome variables were the development of septic shock and death within 90 days after diagnosis of septic shock. The IL‐1B rs16944 polymorphism was genotyped by Sequenom's MassARRAY platform. The association analysis was performed under a recessive genetic model (AA vs. GG/GC).
Results
The frequency of septic shock was higher in patients with IL‐1B rs16944 AA genotype than in patients with IL‐1B rs16944 GG/AG genotype when all patients were taken into account (63·6% vs. 41·8%; P = 0·006), cardiac surgery (52·2% vs. 33·3%; P = 0·072) and abdominal surgery (76·2% vs. 50·2%; P = 0·023). However, the IL‐1B rs16944 AA genotype was only associated with higher likelihood of septic shock in the analysis of all population adjusted odds ratio (aOR) = 2·26 (95%CI = 1·03; 4·97; P = 0·042, but not when it was stratified by cardiac surgery (P = 0·175) or abdominal surgery (P = 0·467). Similarly, IL‐1B rs16944 AA genotype was also associated with higher likelihood of septic shock‐related death in all population aOR = 2·67 (95%CI = 1·07; 4·97); P = 0·035.
Conclusions
IL‐1B rs16944 AA genotype seems to be related to the onset of septic shock and death in patients who underwent major surgery.
Abstract Purpose There is increasing evidence on the relationship between endogenously produced immunoglobulins and the clinical outcome in septic shock (SS). Materials and methods Levels of ...immunoglobulin G (IgG) subclasses, immunoglobulin A (IgA), immunoglobulin M (IgM), and immunoglobulin E were measured in plasma from 42 patients with SS and in 36 patients with systemic inflammatory response syndrome at diagnosis. Association of immunoglobulins levels with disease severity and outcome was evaluated. Results Eighteen patients with SS finally died. Both patients with systemic inflammatory response syndrome and SS showed subnormal levels of total IgG, IgG2, and IgM. Patients with SS who died showed the lowest levels of total IgG and IgG1. Total IgG, IgG1, IgG2, IgG3, IgG4, and IgA correlated inversely with Acute Physiology and Chronic Health Evaluation II score in SS. Univariate Cox regression analysis showed that levels of IgG1, IgG2, IgG3, IgM, IgA, and total IgG were inversely associated to the probability of death at 28 days. Multivariate analysis showed that IgG1, total IgG, IgM, and IgA behaved as independent protective factors against mortality (hazard ratio, P ): 0.23, 0.026; 0.16, 0.028; 0.11, 0.042; 0.05, 0.010, respectively, whereas IgG3 showed a protective trend also. Conclusions Our study evidenced that, in addition to IgG1, other major endogenous immunoglobulins isotypes and subclasses seem to play a beneficial role in SS.
Viruses are strongly associated with acute exacerbations of chronic obstructive pulmonary disease (AECOPD). Interferon-inducible protein-10 has been recently described as a biomarker of human ...rhinovirus infection, but there are no reports on the role of other immune mediators in AECOPD of viral origin. As an attempt to evaluate the differences in the systemic immune mediators profiles between AECOPD patients with presence/absence of viral infection, we measured 27 cytokines, chemokines, and cellular growth factors in the plasma of 40 patients with AECOPD needing of hospitalization by using a Luminex-based assay. These patients were screened for the presence of 16 different respiratory viruses in pharyngeal swabs. Ten healthy controls were recruited for comparison purposes. Both the group of patients with an associated viral infection (n = 11) and those with no viral infection (n = 29) showed high levels of vascular endothelial growth factor, interleukin-13 (IL-13), and IL-2. On the other hand, viral infection in AECOPD induced a coordinated response of innate immunity chemokines (eotaxin, interferon-inducible protein-10, IL-8), Th1 cytokines (IL-12p70, IL-15), and the immunomodulatory IL-10. This profile corresponds to a typical antiviral response signature previously documented for other viral infections. The identification of early cytokine signatures associated with viral infection in AECOPD could contribute to design better treatment strategies for this disease.
► Cytokines have been widely assessed as potential biomarkers in sepsis. ► None has sufficient specificity or sensitivity to be employed in clinical practice. ► A combined cytokine score was ...evaluated to predict mortality in severe sepsis. ► The combined score predicted better mortality than individual interleukins. ► Combined scores could improve the prognostic render of cytokines in severe sepsis.
Identification of patients at increased risk of death is dramatically important in severe sepsis. Cytokines have been widely assessed as potential biomarkers in this disease, but none of the cytokines studied has evidenced a sufficient specificity or sensitivity to be routinely employed in clinical practice. In this pilot study, we profiled 17 immune mediators in the plasma of 29 consecutively recruited patients with severe sepsis or septic shock, during the first 24h following admission to the ICU, by using a Bio-Plex Human Cytokine 17-Plex Panel (Bio-Rad). Patients were 66.1year old in average. Twelve patients of our cohort died during hospitalization at the ICU, eight of them in the first 72h due to multiorganic dysfunction syndrom (MODS). Levels in plasma of three pro-inflammatory mediators (IL-6, IL-8, MCP-1) and of an immunosuppressive one (IL-10) were higher in those patients with fatal outcome. We developed a combined score with those cytokines showing to better predict mortality in our cohort based on the results of Cox regression analysis. This way, IL-6, IL-8 and IL-10 were included in the score. Patients were split into two groups based on the percentile 75 (P75) of the plasma levels of these three interleukins. Those patients showing at least one interleukin value higher than P75 were given the value “1”. Those patients showing IL-6, IL-8, IL-10 levels below P75 were given the value “0”. Hazard ratios for mortality at day 3 and day 28th obtained with the combined score were 2–3-fold higher than those obtained with the individual interleukins values. In conclusion, we have described a combined cytokine score associated with a worse outcome in patients with sepsis, which may represent a new avenue to be explored for guiding treatment decisions in this disease.
Boomer et al 5 reported extensive depletion of splenic CD4, CD8, and HLA-DR cells in patients dying of sepsis. ...HLA-DR expression in monocytes has been proposed to be a reliable predictor of ...mortality in severe sepsis 6. Boomer et al 5 reported extensive depletion of splenic CD4, CD8, and HLA-DR cells in patients dying of sepsis. ...HLA-DR expression in monocytes has been proposed to be a reliable predictor of mortality in severe sepsis 6. ...defective expression of genes playing critical roles in T helper/B-cell activation and immunoglobulin isotype switching could contribute to explain the low levels of IgG observed in patients dying of SS.
PDF
