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Organ dysfunction following hemorrhage and sepsis: mechanisms and therapeutic approaches (Review)
D Jarrar1, I H Chaudry, P Wang
1Center for Surgical Research and Department of Surgery, Brown University School of Medicine and Rhode Island Hospital, Providence, RI 02903, USA.
Abstract:
Despite significant advances in the management of trauma victims, sepsis and the ensuing multiple organ failure remain the leading causes of death in the surgical intensive care unit. Although much effort has been focused on the mediators released in large quantities following shock and sepsis, blockade of mediators such as proinflammatory cytokines has not yet resulted in a successful therapy. However, as more studies are forthcoming, the mechanisms responsible for cell and organ dysfunctions following trauma-hemorrhage and sepsis are becoming better understood, and promising new therapeutic approaches are currently being evaluated. In order to understand the precise mechanisms responsible for cellular dysfunction and consequently irreversible organ damage and multiple organ failure, it is important to correlate various pathophysiological changes with mediators and signal transduction pathways at the cellular and subcellular level. In this review we focus first on factors and mediators responsible for producing cell and organ dysfunctions, especially hepatocellular dysfunction, following trauma, hemorrhagic shock, and sepsis. The changes in signaling transduction pathways will also be discussed, specifically the role of mitogen-activated protein kinases, transcription factors, nitric oxide, heat shock proteins, and inflammatory cytokines in the development of cell and organ dysfunctions following trauma-hemorrhage and sepsis. Moreover, potential therapeutic approaches for improving cell and organ functions under adverse circulatory conditions are included.
Insights
Sepsis and multiple organ failure are leading causes of death after trauma. Understanding cellular dysfunction mechanisms and signal transduction pathways is crucial for developing effective therapies to improve outcomes in trauma-hemorrhage and sepsis patients.
Area of Science:
- Surgical critical care
- Trauma-hemorrhage and sepsis research
- Cellular and organ dysfunction mechanisms
Background:
- Sepsis and multiple organ failure are primary causes of mortality in surgical intensive care units.
- Current therapies targeting inflammatory mediators have shown limited success.
- Understanding cellular and subcellular mechanisms is key to improving patient outcomes.
Purpose of the Study:
- To review factors and mediators causing cell and organ dysfunction, particularly hepatocellular dysfunction, after trauma, hemorrhagic shock, and sepsis.
- To discuss changes in signaling transduction pathways involved in organ damage.
- To explore potential therapeutic strategies for improving organ function under critical conditions.
Main Methods:
- Literature review focusing on trauma, hemorrhagic shock, and sepsis.
- Analysis of cellular and subcellular mechanisms of organ dysfunction.
- Examination of signaling pathways including mitogen-activated protein kinases, transcription factors, nitric oxide, heat shock proteins, and inflammatory cytokines.
Main Results:
- Trauma-hemorrhage and sepsis induce complex cellular dysfunctions.
- Specific signaling pathways (MAPKs, transcription factors, NO, HSPs, cytokines) play critical roles in organ damage.
- Hepatocellular dysfunction is a significant consequence of these conditions.
Conclusions:
- Further research into cellular mechanisms and signal transduction is essential for effective treatment development.
- Targeting specific pathways may offer promising therapeutic avenues.
- Improving organ function in trauma and sepsis patients requires a deeper understanding of underlying pathophysiology.