[Septic shock and selenium administration]

Area of Science:

• Biochemistry
• Trace Element Metabolism
• Enzymology

Context:

• Selenium is an essential trace element vital for antioxidant enzyme function, including glutathione peroxidases and thioredoxin reductase.
• In septic shock, excessive reactive oxygen species contribute to tissue damage, while plasma selenium levels significantly decrease.
• The role of selenium in mitigating oxidative stress and its impact on inflammatory pathways in sepsis is an area of active investigation.

Purpose:

• To review the role of selenium in the context of sepsis and septic shock.
• To examine the evidence for selenium supplementation in managing severe infections and associated oxidative stress.
• To provide recommendations for selenium administration in critically ill patients based on current literature.

Summary:

• Selenium, as selenocysteine, is integral to antioxidant enzymes that detoxify reactive oxygen species (ROS).
• Septic shock patients exhibit early and marked plasma selenium depletion, potentially due to redistribution for metabolic needs.
• While preliminary studies suggest selenium treatment may be beneficial in severe sepsis, robust clinical data is lacking, necessitating cautious dosing within physiological limits.

Impact:

• Understanding selenium's role in sepsis can inform therapeutic strategies to combat oxidative stress and improve patient outcomes.
• Further well-designed clinical trials are required to establish optimal selenium dosage and efficacy in septic patients.
• This review highlights the potential of selenium as an adjunctive therapy in critical care settings, emphasizing the need for evidence-based guidelines.