Lactate and Immunosuppression in Sepsis.

Area of Science:

• Immunometabolism
• Sepsis Pathophysiology
• Innate Immunity

Background:

• Serum lactate levels traditionally indicate tissue hypoxia and sepsis severity.
• Emerging research suggests tumor-derived lactate has local immunosuppressive effects.
• Metabolism significantly influences innate immune and inflammatory responses during sepsis.

Purpose of the Study:

• To summarize recent findings on lactate's role in sepsis.
• To explore the link between immune cell metabolism and sepsis outcomes.
• To highlight lactate's potential immunosuppressive function in sepsis.

Main Methods:

• Review of recent studies on immunometabolism in sepsis.
• Analysis of the metabolic requirements for immune cell activation.
• Investigation of lactate production during aerobic glycolysis.

Main Results:

• Immune cell activation is dependent on aerobic glycolytic metabolism.
• Lactate produced via aerobic glycolysis may exert immunosuppressive effects.
• This contrasts with lactate's traditional role as a hypoxia marker.

Conclusions:

• Lactate's role in sepsis is complex, potentially involving immunosuppression.
• Aerobic glycolysis and its byproduct, lactate, are critical in regulating immune responses during sepsis.
• Further research into immunometabolism could reveal new therapeutic targets for sepsis.