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Updated: Jan 21, 2026
A Data-Driven Approach to Quantifying Immune States in Sepsis
Published on: February 7, 2025
Pediatric sepsis and multiple organ dysfunction syndrome
O Despond1, F Proulx, J A Carcillo
1Division of Pediatric Intensive Care, Department of Pediatrics, Sainte-Justine Hospital, Université de Montréal, Montréal, Canada.
Insights
Systemic inflammatory response syndrome (SIRS) and sepsis involve complex cytokine signaling. Current therapies for sepsis and multiple organ dysfunction syndrome remain primarily supportive.
Area of Science:
- Critical care medicine
- Immunology
- Pathophysiology
Background:
- Systemic inflammatory response syndrome (SIRS) is the body's systemic response to inflammatory mediators.
- Sepsis is defined as SIRS caused by infection, potentially leading to multiple organ dysfunction syndrome (MODS).
- The pathophysiology involves complex interactions of cellular and molecular mediators.
Purpose of the Study:
- To review the pathophysiology of SIRS, sepsis, and MODS.
- To discuss current and emerging therapeutic strategies.
- To highlight the complexity of these conditions.
Main Methods:
- Literature review of pathophysiologic mechanisms.
- Discussion of cellular and molecular mediators.
- Overview of recent therapeutic investigations.
Main Results:
- SIRS involves dysregulated cytokine signaling.
- Pathophysiology may include loss of autoregulation, microcirculatory issues, and apoptosis.
- Novel treatments like immune-modulating diets and molecular immunomodulation require further evaluation.
Conclusions:
- Sepsis and MODS are severe conditions with complex underlying mechanisms.
- Current treatment for sepsis and MODS is largely supportive.
- Further research is needed to evaluate new therapeutic approaches.
Abstract:
Systemic inflammatory response syndrome may be viewed as the systemic expression of cytokine signals that normally function on an autocrine or paracrine level. Sepsis is defined as systemic inflammatory response syndrome caused by an infection. Multiple organ dysfunction syndrome may represent the end stage of severe systemic inflammatory response syndrome or sepsis. Many cells are involved, including endothelial cells and leukocytes and multiple proinflammatory and antiinflammatory mediators (cytokines, oxygen free radicals, coagulation factors, and so forth). Various pathophysiologic mechanisms have been postulated. The most popular theory is that the inflammatory process loses its autoregulatory capacity; however, microcirculatory dysregulation and apoptosis may also be important, and a new paradigm posits a complex nonlinear system. Many new treatments have been studied recently. The usefulness of immune modulating diets remains to be evaluated. Molecular immunomodulation is still of unclear value. The therapy of sepsis and multiple organ dysfunction syndrome remains mainly supportive.
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