Exercise induces pentane production and neutrophil activation in humans. Effect of propranolol

1990 ◽  
Vol 61 (3-4) ◽  
pp. 319-322 ◽  
Author(s):  
J. Pincemail ◽  
G. Camus ◽  
A. Roesgen ◽  
E. Dreezen ◽  
Y. Bertrand ◽  
...  
Keyword(s):  
Neutrophil Activation ◽  
Pentane Production

Anti-TNF therapy reduces neutrophil activation in juvenile idiopathic arthritis

2003 ◽  
Vol 28 (05) ◽  
Author(s):  
D Foell ◽  
H Schmeling ◽  
MI Frosch ◽  
T Vogl ◽  
G Horneff ◽  
...  
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Neutrophil Activation

scholarly journals Early prolonged neutrophil activation in critically ill patients with sepsis

2021 ◽  
Vol 27 (2) ◽  
pp. 192-200
Author(s):  
Sanna Törnblom ◽  
Sara Nisula ◽  
Suvi T Vaara ◽  
Meri Poukkanen ◽  
Sture Andersson ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Intensive Care Unit Admission ◽  
Plasma Concentrations ◽  
Neutrophil Activation ◽  
Early Event ◽  
Heparin Binding ◽  
Activation Markers ◽  
Heparin Binding Protein ◽  
Pro Inflammatory Cytokines

We hypothesised that plasma concentrations of biomarkers of neutrophil activation and pro-inflammatory cytokines differ according to the phase of rapidly evolving sepsis. In an observational study, we measured heparin-binding protein (HBP), myeloperoxidase (MPO), IL-6 and IL-8 in 167 sepsis patients on intensive care unit admission. We prospectively used the emergence of the first sepsis-associated organ dysfunction (OD) as a surrogate for the sepsis phase. Fifty-five patients (of 167, 33%) developed the first OD > 1 h before, 74 (44%) within ± 1 h, and 38 (23%) > 1 h after intensive care unit admission. HBP and MPO were elevated at a median of 12 h before the first OD, remained high up to 24 h, and were not associated with sepsis phase. IL-6 and IL-8 rose and declined rapidly close to OD emergence. Elevation of neutrophil activation markers HBP and MPO was an early event in the evolution of sepsis, lasting beyond the subsidence of the pro-inflammatory cytokine reaction. Thus, as sepsis biomarkers, HBP and MPO were not as prone as IL-6 and IL-8 to the effect of sample timing.

scholarly journals The host transcriptional response to Candidemia is dominated by neutrophil activation and heme biosynthesis and supports novel diagnostic approaches

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Julie M. Steinbrink ◽  
Rachel A. Myers ◽  
Kaiyuan Hua ◽  
Melissa D. Johnson ◽  
Jessica L. Seidelman ◽  
...  
Keyword(s):  
Immune Response ◽  
Bacterial Infection ◽  
Viral Infection ◽  
Fungal Infection ◽  
Host Response ◽  
Hospitalized Patients ◽  
Neutrophil Activation ◽  
Heme Biosynthesis ◽  
Transcriptional Analysis ◽  
Diagnostic Approaches

Abstract Background Candidemia is one of the most common nosocomial bloodstream infections in the United States, causing significant morbidity and mortality in hospitalized patients, but the breadth of the host response to Candida infections in human patients remains poorly defined. Methods In order to better define the host response to Candida infection at the transcriptional level, we performed RNA sequencing on serial peripheral blood samples from 48 hospitalized patients with blood cultures positive for Candida species and compared them to patients with other acute viral, bacterial, and non-infectious illnesses. Regularized multinomial regression was utilized to develop pathogen class-specific gene expression classifiers. Results Candidemia triggers a unique, robust, and conserved transcriptomic response in human hosts with 1641 genes differentially upregulated compared to healthy controls. Many of these genes corresponded to components of the immune response to fungal infection, heavily weighted toward neutrophil activation, heme biosynthesis, and T cell signaling. We developed pathogen class-specific classifiers from these unique signals capable of identifying and differentiating candidemia, viral, or bacterial infection across a variety of hosts with a high degree of accuracy (auROC 0.98 for candidemia, 0.99 for viral and bacterial infection). This classifier was validated on two separate human cohorts (auROC 0.88 for viral infection and 0.87 for bacterial infection in one cohort; auROC 0.97 in another cohort) and an in vitro model (auROC 0.94 for fungal infection, 0.96 for bacterial, and 0.90 for viral infection). Conclusions Transcriptional analysis of circulating leukocytes in patients with acute Candida infections defines novel aspects of the breadth of the human immune response during candidemia and suggests promising diagnostic approaches for simultaneously differentiating multiple types of clinical illnesses in at-risk, acutely ill patients.

scholarly journals Synthetic Hexanucleotides as a Tool to Overcome Excessive Neutrophil Activation Caused by CpG-Containing Oligonucleotides

Pathogens ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 530
Author(s):  
Ekaterina A. Golenkina ◽  
Svetlana I. Galkina ◽  
Nina G. Dolinnaya ◽  
Evgenii A. Arifulin ◽  
Yulia M. Romanova ◽  
...  
Keyword(s):  
Neutrophil Activation ◽  
Immunomodulatory Activity ◽  
Neutrophilic Granulocytes ◽  
Negative Consequences ◽  
Prooxidant Effect ◽  
Bacterial Dna ◽  
Cpg Odns ◽  
Tissue Damages ◽  
The One ◽  
Tissue Origin

Mimicking bacterial DNA, synthetic CpG-containing oligodeoxyribonucleotides (CpG-ODNs) have a powerful immunomodulatory potential. Their practical application is mainly associated with the production of vaccines, where they are used as adjuvants, as well as in local antimicrobial therapy. CpG-ODNs act on a wide variety of immune cells, including neutrophilic granulocytes. On the one hand, the stimulatory effect provides both the direct implementation of their antimicrobial and fungicidal mechanisms, and an avalanche-like strengthening of the immune signal due to interaction with other participants in the immune process. On the other hand, hyperactivation of neutrophilic granulocytes can have negative consequences. In particular, the formation of unreasonably high amounts of reactive oxygen species leads to tissue damages and, as a consequence, a spontaneous aggravation and prolongation of the inflammatory process. Under physiological conditions, a large number of DNA fragments are present in inflammation foci: both of microbial and self-tissue origin. We investigated effects of several short modified hexanucleotides on the main indicators of neutrophil activation, as well as their influence on the immunomodulatory activity of known synthetic CpG-ODNs. The results obtained show that short oligonucleotides partially inhibit the prooxidant effect of synthetic CpG-ODNs without significantly affecting the ability of the latter to overcome bacteria-induced pro-survival effects on neutrophilic granulocytes.

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