scholarly journals High Mobility Group Box-1 Protein and Outcomes in Critically Ill Surgical Patients Requiring Open Abdominal Management

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Michelle S. Malig ◽  
Craig N. Jenne ◽  
Chad G. Ball ◽  
Derek J. Roberts ◽  
Zhengwen Xiao ◽  
...  
Keyword(s):  
Critically Ill ◽  
Controlled Trial ◽  
Clinical Care ◽  
High Mobility ◽  
Abdominal Sepsis ◽  
High Mobility Group ◽  
Molecular Patterns ◽  
Injured Patients ◽  
Relationship Of ◽  
Damage Associated Molecular Patterns

Background. Previous studies assessing various cytokines in the critically ill/injured have been uninformative in terms of translating to clinical care management. Animal abdominal sepsis work suggests that enhanced intraperitoneal (IP) clearance of Damage-Associated Molecular Patterns (DAMPs) improves outcome. Thus measuring the responses of DAMPs offers alternate potential insights and a representative DAMP, High Mobility Group Box-1 protein (HMGB-1), was considered. While IP biomediators are being recognized in critical illness/trauma, HMGB-1 behaviour has not been examined in open abdomen (OA) management. Methods. A modified protocol for HMGB-1 detection was used to examine plasma/IP fluid samples from 44 critically ill/injured OA patients enrolled in a randomized controlled trial comparing two negative pressure peritoneal therapies (NPPT): Active NPPT (ANPPT) and Barker’s Vacuum Pack NPPT (BVP). Samples were collected and analyzed at the time of laparotomy and at 24 and 48 hours after. Results. There were no statistically significant differences in survivor versus nonsurvivor HMGB-1 plasma or IP concentrations at baseline, 24 hours, or 48 hours. However, plasma HMGB-1 levels tended to increase continuously in the BVP cohort. Conclusions. HMGB-1 appeared to behave differently between NPPT cohorts. Further studies are needed to elucidate the relationship of HMGB-1 and outcomes in septic/injured patients.

Abstract 288: High Mobility Group Box 1 (HMGB1) is Involved in the Physiopathology of Post-Cardiac Arrest Syndrome

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_2) ◽  
Author(s):  
Emilie Boissady ◽  
Cynthia El Hedjaj ◽  
Matthias Kohlhauer ◽  
Bijan Ghaleh ◽  
Renaud Tissier
Keyword(s):  
Cardiac Arrest ◽  
High Mobility ◽  
Brain Regions ◽  
Clinical Parameter ◽  
High Mobility Group ◽  
Neurological Dysfunction ◽  
Blood Levels ◽  
Molecular Patterns ◽  
Damage Associated Molecular Patterns

Introduction: After cardiac arrest, a sepsis-like syndrome is observed and contributes to poor prognosis. Hypothesis: This syndrome could be provoked by the massive release of Damage Associated Molecular Patterns (DAMP). Our aim was to investigate the role of the High mobility group box 1 (HMGB1), a well-characterized nuclear DAMP, in an experimental model of cardiac arrest. Methods: Rabbits were anesthetized and submitted to 10 min of ventricular fibrillation. After resuscitation, they either received an administration of the inhibitor of HMGB1 release glycyrrhizin (4 mg/kg i.v.. (GL group, n=6), or saline (5 ml, i.v.; CT group, n=6). Two additional groups received glycyrrhizin (n=4) or saline (n=4) alone without cardiac arrest (Sham groups). Blood samples were withdrawn to evaluate the kinetics of HMGB1 release. After awakening, survival and neurological dysfunction were evaluated during 3 days. Animals were then euthanized and brain histologic damages were assessed (fluorojade-C staining). Results: In the Sham groups, glycyrrhizin did not modify hemodynamic nor clinical parameter as compared to saline. In the CT group, HMGB1 blood levels increased since 30 min after cardiac arrest and remained elevated until the end of the follow-up. This increase in HMGB1 concentrations was significantly attenuated in GL vs CR (18±1 vs 29±5 and ng/ml at 30 min after cardiac arrest, respectively). Neurological dysfunction score or survival were not significantly improved in GL vs CT (e.g., survival = 50 vs 33 % at day 3 in GT vs CT group). However, fluorojade C staining showed a dramatic attenuation of degenerating neurons in GL vs CT groups in all brain regions (e.g., 7±3 vs 32±10 neurons/field in cortex, respectively). Conclusion: HMGB1 played a key role in early inflammation and promoted neuronal death after cardiac arrest. Its inhibition alone does not provide sufficient benefits to improve the clinical outcome. It emphasizes the importance of other contributors, beyond inflammation and neurons cell death. Adjunction of HMGB1 inhibitors to other therapies could still be of interest.

scholarly journals Release mechanisms of major DAMPs

APOPTOSIS ◽  
2021 ◽  
Vol 26 (3-4) ◽  
pp. 152-162
Author(s):  
Atsushi Murao ◽  
Monowar Aziz ◽  
Haichao Wang ◽  
Max Brenner ◽  
Ping Wang
Keyword(s):  
Rna Binding ◽  
High Mobility ◽  
Live Cells ◽  
Membrane Channel ◽  
Membrane Rupture ◽  
Underlying Mechanisms ◽  
Shock Proteins ◽  
Molecular Patterns ◽  
Damage Associated Molecular Patterns ◽  
Secretory Lysosomes

AbstractDamage-associated molecular patterns (DAMPs) are endogenous molecules which foment inflammation and are associated with disorders in sepsis and cancer. Thus, therapeutically targeting DAMPs has potential to provide novel and effective treatments. When establishing anti-DAMP strategies, it is important not only to focus on the DAMPs as inflammatory mediators but also to take into account the underlying mechanisms of their release from cells and tissues. DAMPs can be released passively by membrane rupture due to necrosis/necroptosis, although the mechanisms of release appear to differ between the DAMPs. Other types of cell death, such as apoptosis, pyroptosis, ferroptosis and NETosis, can also contribute to DAMP release. In addition, some DAMPs can be exported actively from live cells by exocytosis of secretory lysosomes or exosomes, ectosomes, and activation of cell membrane channel pores. Here we review the shared and DAMP-specific mechanisms reported in the literature for high mobility group box 1, ATP, extracellular cold-inducible RNA-binding protein, histones, heat shock proteins, extracellular RNAs and cell-free DNA.

scholarly journals High mobility group box 1 as a biomarker in critically ill patients

2018 ◽  
Vol 32 (8) ◽  
pp. e22584 ◽  
Author(s):  
Eray Yagmur ◽  
Lukas Buendgens ◽  
Ulf Herbers ◽  
Anne Beeretz ◽  
Ralf Weiskirchen ◽  
...  
Keyword(s):  
Critically Ill ◽  
Critically Ill Patients ◽  
High Mobility ◽  
High Mobility Group

Alarmins at the maternal–fetal interface: involvement of inflammation in placental dysfunction and pregnancy complications

2019 ◽  
Vol 97 (3) ◽  
pp. 206-212 ◽  
Author(s):  
Marie-Eve Brien ◽  
Bernadette Baker ◽  
Cyntia Duval ◽  
Virginie Gaudreault ◽  
Rebecca L. Jones ◽  
...  
Keyword(s):  
Pregnancy Complications ◽  
Deoxyribonucleic Acid ◽  
High Mobility ◽  
Placental Dysfunction ◽  
Current State ◽  
Hofbauer Cells ◽  
Molecular Patterns ◽  
Damage Associated Molecular Patterns ◽  
In Pregnancy

Inflammation is known to be associated with placental dysfunction and pregnancy complications. Infections are well known to be a cause of inflammation but they are frequently undetectable in pregnancy complications. More recently, the focus has been extended to inflammation of noninfectious origin, namely caused by endogenous mediators known as “damage-associated molecular patterns (DAMPs)” or alarmins. In this manuscript, we review the mechanism by which inflammation, sterile or infectious, can alter the placenta and its function. We discuss some classical DAMPs, such as uric acid, high mobility group box 1 (HMGB1), cell-free fetal deoxyribonucleic acid (DNA) (cffDNA), S100 proteins, heat shock protein 70 (HSP70), and adenosine triphosphate (ATP) and their impact on the placenta. We focus on the main placental cells (i.e., trophoblast and Hofbauer cells) and describe the placental response to, and release of, DAMPs. We also covered the current state of knowledge about the role of DAMPs in pregnancy complications including preeclampsia, fetal growth restriction, preterm birth, and stillbirth and possible therapeutic strategies to preserve placental function.

scholarly journals Neutrophil Extracellular Traps (NETs) and Damage-Associated Molecular Patterns (DAMPs): Two Potential Targets for COVID-19 Treatment

2020 ◽  
Vol 2020 ◽  
pp. 1-25 ◽  
Author(s):  
Sebastiano Cicco ◽  
Gerolamo Cicco ◽  
Vito Racanelli ◽  
Angelo Vacca
Keyword(s):  
Immune Response ◽  
Innate Immunity ◽  
Targeted Therapy ◽  
High Mobility ◽  
Neutrophil Extracellular Traps ◽  
Lung Cells ◽  
Extracellular Traps ◽  
Molecular Patterns ◽  
Damage Associated Molecular Patterns ◽  
Excessive Inflammatory Response

COVID-19 is a pandemic disease caused by the new coronavirus SARS-CoV-2 that mostly affects the respiratory system. The consequent inflammation is not able to clear viruses. The persistent excessive inflammatory response can build up a clinical picture that is very difficult to manage and potentially fatal. Modulating the immune response plays a key role in fighting the disease. One of the main defence systems is the activation of neutrophils that release neutrophil extracellular traps (NETs) under the stimulus of autophagy. Various molecules can induce NETosis and autophagy; some potent activators are damage-associated molecular patterns (DAMPs) and, in particular, the high-mobility group box 1 (HMGB1). This molecule is released by damaged lung cells and can induce a robust innate immunity response. The increase in HMGB1 and NETosis could lead to sustained inflammation due to SARS-CoV-2 infection. Therefore, blocking these molecules might be useful in COVID-19 treatment and should be further studied in the context of targeted therapy.

scholarly journals Markedly Increased High-Mobility Group Box 1 Protein in a Patient with Small-for-Size Syndrome

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Darren G. Craig ◽  
Patricia Lee ◽  
E. Anne Pryde ◽  
Ernest Hidalgo ◽  
Peter C. Hayes ◽  
...  
Keyword(s):  
Inflammatory Mediators ◽  
Fatal Case ◽  
High Mobility ◽  
Serum Levels ◽  
Normal Function ◽  
High Mobility Group ◽  
Hmgb1 Protein ◽  
Membrane Bound ◽  
Small For Size ◽  
Molecular Patterns

Background. Small-for-size syndrome (SFSS) occurs in the presence of insufficient liver mass to maintain normal function after liver transplantation. Murine mortality following 85% hepatectomy can be reduced by the use of soluble receptor for advanced glycation end products (sRAGE) to scavenge damage-associated molecular patterns and prevent their engagement with membrane-bound RAGE.Aims. To explore serum levels of sRAGE, high-mobility group box-1 (HMGB1) protein, and other soluble inflammatory mediators in a fatal case of SFSS.Methods. Serum levels of HMGB1, sRAGE, IL-18, and other inflammatory mediators were measured by ELISA in a case of SFSS, and the results were compared with 8 patients with paracetamol-induced acute liver failure (ALF) and 6 healthy controls (HC).Results. HMGB1 levels were markedly higher in the SFSS patient (92.1 ng/mL) compared with the ALF patients (median (IQR) 11.4 (3.7–14.8) ng/mL) and HC (1.42 (1.38–1.56) ng/mL). In contrast, sRAGE levels were lower in the SFSS patient (1.88 ng/mL) compared with the ALF patients (3.53 (2.66–12.37) ng/mL) and were similar to HC levels (1.40 (1.23–1.89) ng/mL).Conclusion. These results suggest an imbalance between pro- and anti-inflammatory innate immune pathways in SFSS. Modulation of the HMGB1-RAGE axis may represent a future therapeutic avenue in this condition.

scholarly journals Damage-Associated Molecular Patterns (DAMPs) related to Immunogenic Cell Death are differentially triggered by clinically relevant chemotherapeutics in lung adenocarcinoma cells

2019 ◽  
Author(s):  
Eduardo Filippi-Chiela ◽  
José Ignácio Solari ◽  
Cristiano Andrade ◽  
Fabio Klamt
Keyword(s):  
Cell Death ◽  
Lung Adenocarcinoma ◽  
High Mobility ◽  
Cell Number ◽  
Immunogenic Cell Death ◽  
Strong Negative Correlation ◽  
Adenocarcinoma Cells ◽  
Lung Adenocarcinoma Cells ◽  
Molecular Patterns ◽  
Damage Associated Molecular Patterns

Abstract Background Chemotherapeutics can stimulate immune antitumor response by inducing immunogenic cell death (ICD), which is characterized by the appearance of Damage-Associated Molecular Patterns (DAMPs) like the exposure of calreticulin (CRT) in cell surface, the release of ATP and the secretion of High Mobility Group Box 1 (HMGB1). Methods Here, our objective was to investigate levels of ICD-associated DAMPs induced by chemotherapeutics commonly used in the clinical practice of non-small cell lung cancer (NSCLC) and the prognosis values of these DAMPs.A549 human lung adenocarcinoma cells were treated with cisplatin, carboplatin, etoposide, paclitaxel and gemcitabine using clinically relevant conditions (doses, times and co-treatments). We assessed ICD-associated DAMPs, cell viability, apoptosis and autophagy in an integrated way. Results We found that cisplatin induced the highest levels of apoptosis, while carboplatin and etoposide were the less cytotoxic. Cisplatin also induced the highest levels of ICD-associated DAMPs, which was not incremented by co-treatments. Etoposide induced the lower levels of ICD and the highest levels of autophagy, suggesting that the cytoprotective role of autophagy is dominant in relation to its pro-ICD role. High levels of CRT were associated with better prognosis in TCGA databank. In an integrative analysis we found a strong negative correlation between cell number and ICD-associated DAMPs as well as between autophagy and ICD-associated DAMPs. We also purpose a mathematical integration of ICD-associated DAMPs in an index (InDAMPs) that may represent with greater biological relevance this process. Conclusions Cisplatin alone induced the highest levels of ICD-associated DAMPs, so that its combination with immunotherapies can be a promising therapeutic strategy in NSCLC.

Sign in / Sign up

Export Citation Format

Share Document