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Infection Post-AKI: Should We Worry?
1Section of Pediatric Cardiology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA, katja.gist@childrenscolorado.org.
Abstract:
Acute kidney injury (AKI) continues to be a major problem among hospitalized patients, and there is a growing appreciation that the high mortality in AKI may be due to its deleterious systemic effects. Recent research has begun to disentangle kidney-organ cross talk, wherein the host response to AKI becomes maladaptive, resulting in effects on numerous remote organs such as the lung, heart, liver, spleen, and brain. AKI also adversely affects immune function and is widely considered an immunosuppressed state. A wealth of data has accumulated that patients with AKI have a substantial increased risk of subsequent infection and sepsis. Indeed, sepsis is the leading cause of death in patients with established AKI. Unfortunately, little is known regarding the nature of the abnormal immune response that increases the risk for septic complications which may be persistent and prolonged. Until mechanistic pathways that drive the AKI-immune system-infection process are identified, and physicians should attempt to minimize AKI, its severity, and duration and anticipate infectious complications.
Insights
Acute kidney injury (AKI) significantly impacts hospitalized patients, increasing infection and sepsis risk due to systemic effects. Understanding the underlying immune dysfunction is crucial for managing this high-mortality condition.
Area of Science:
- Nephrology
- Immunology
- Critical Care Medicine
Background:
- Acute kidney injury (AKI) is a prevalent and serious condition in hospitalized patients.
- High mortality in AKI is increasingly linked to its detrimental systemic effects on multiple organs.
- AKI is associated with impaired immune function, leading to an immunosuppressed state.
Purpose of the Study:
- To explore the systemic consequences of AKI beyond the kidneys.
- To investigate the link between AKI, immune dysfunction, and increased susceptibility to infection and sepsis.
- To highlight the knowledge gap in understanding the prolonged immune alterations post-AKI.
Main Methods:
- Review of current research on kidney-organ cross-talk in AKI.
- Analysis of data linking AKI to increased risk of infection and sepsis.
- Discussion of the current understanding of immune system alterations in AKI patients.
Main Results:
- AKI triggers maladaptive host responses affecting remote organs (lung, heart, liver, spleen, brain).
- Patients with AKI exhibit a substantially increased risk of subsequent infections and sepsis.
- Sepsis is identified as the primary cause of death in patients with established AKI.
Conclusions:
- The precise nature of immune dysregulation increasing sepsis risk in AKI remains largely unknown.
- Further research is needed to elucidate the mechanistic pathways of the AKI-immune system-infection process.
- Clinical management should focus on minimizing AKI severity and duration while anticipating infectious complications.
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