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Multiple organ failure: clinical and experimental
Abstract:
The clinical scenario of multiple organ failure (MOF) is reviewed and its frequent correlation with sepsis emphasized. It is hypothesized that MOF is produced by the formation of immune complexes (IC) in response to infection with deposition on organs such as the liver, lung, and kidney. Such immune complexes trap macrophages which can directly damage endothelium. Such a pathologic picture is in keeping with that of MOF. Granular deposits of IgG, IgM, C3, C5, and fibrinogen have been identified in the organs of four patients dying of MOF and sepsis. Similar deposits have been identified using fluorescent antibody stains in the organs of rabbits following cecal perforation. It is hypothesized that sepsis may produce organ failure at a distance from the site of infection via deposits of immune complexes.
Insights
Multiple organ failure (MOF) is often linked to sepsis. This study suggests immune complexes (IC) from infection cause MOF by damaging organs like the liver, lung, and kidney.
Area of Science:
- Immunology
- Pathology
- Critical Care Medicine
Background:
- Multiple organ failure (MOF) is a critical condition frequently associated with sepsis.
- The precise mechanisms underlying MOF development remain incompletely understood.
Purpose of the Study:
- To investigate the hypothesis that immune complexes (IC) mediate MOF in sepsis.
- To identify the deposition patterns of immune components in organs affected by MOF.
Main Methods:
- Review of clinical cases of MOF and sepsis.
- Identification of granular deposits (IgG, IgM, C3, C5, fibrinogen) in patient organs.
- Experimental induction of sepsis in rabbits (cecal perforation) followed by organ analysis using fluorescent antibody stains.
Main Results:
- Granular deposits of IgG, IgM, C3, C5, and fibrinogen were found in the organs of patients with MOF and sepsis.
- Similar deposits were observed in rabbit organs after induced sepsis.
Conclusions:
- Sepsis-induced immune complexes (IC) may contribute to multiple organ failure (MOF).
- These ICs can deposit in organs, potentially trapping macrophages and damaging endothelium, leading to organ dysfunction.
- This mechanism may explain organ failure occurring distantly from the primary infection site in sepsis.