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Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
Published on: November 21, 2025
Circulating pro-apoptotic mediators in burn septic acute renal failure
Heleen M Oudemans-van Straaten1
1Department of Intensive Care, Onze Lieve Vrouwe Gasthuis, Oosterpark, 1091 AC Amsterdam, Netherlands. h.m.oudemans-vanstraaten@olvg.nl
Abstract:
The pathogenesis of septic acute kidney injury (AKI) is not well understood. In the present issue of Critical Care, the combined clinical and experimental study from Mariano's group provides new insight into the disease. The study shows that plasma from septic burn patients with acute renal failure initiated pro-apoptotic effects and functional alterations in renal tubular cells and podocytes in vitro that correlated with the degree of proteinuria and renal dysfunction. Pro-apoptotic effects were not attributable to antibiotic or uremic toxicity, but were partially attributable to endotoxin. Sepsis and burn had additive effects. Apart from increasing our understanding of the pathogenesis of septic AKI, the study justifies further research on therapeutic interventions in several directions. These include the binding and elimination of the source of endotoxin by selective decontamination of the digestive tract, the blocking of apoptotic pathways, or the extracorporeal removal of circulating toxic mediators using high permeability hemofiltration or coupled plasma filtration and absorption.
Insights
Plasma from septic burn patients with kidney injury causes cell damage, partly due to endotoxins. This finding offers new therapeutic targets for septic acute kidney injury (AKI).
Area of Science:
- Nephrology
- Critical Care Medicine
- Pathogenesis of Septic Acute Kidney Injury
Background:
- Septic acute kidney injury (AKI) pathogenesis remains unclear.
- A novel study investigates plasma effects from septic burn patients with AKI on renal cells.
- This research aims to elucidate mechanisms underlying septic AKI.
Discussion:
- Plasma from septic AKI patients induces pro-apoptotic effects and functional changes in renal tubular cells and podocytes.
- These effects correlate with proteinuria and renal dysfunction severity.
- Antibiotic or uremic toxicity were ruled out as primary causes; endotoxin plays a partial role.
Key Insights:
- Sepsis and burn injuries have additive detrimental effects on kidney function.
- Endotoxin is identified as a contributing factor to the observed pro-apoptotic effects.
- The study highlights the complex interplay of factors in septic AKI.
Outlook:
- Further research into therapeutic interventions is warranted.
- Potential strategies include selective digestive decontamination to eliminate endotoxin sources.
- Blocking apoptotic pathways and extracorporeal removal of toxic mediators are promising avenues.
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