Inflammation-driven immune reprogramming in sepsis: from cytokine storm to immunoparalysis

Area of Science:

• Immunology
• Critical Care Medicine
• Translational Medicine

Background:

• Sepsis is a leading cause of preventable death, often treated as a uniform inflammatory syndrome.
• Therapeutic development has been hindered by sepsis's complex, evolving, and heterogeneous biology.
• Current approaches fail to account for the dynamic immune reprogramming characteristic of sepsis.

Purpose of the Study:

• To reframe sepsis as an inflammation-driven immune reprogramming disorder.
• To synthesize advances in human immune profiling for a new sepsis framework.
• To guide next-generation interventions and clinical trial designs.

Main Methods:

• Narrative review of recent human immune profiling studies.
• Synthesis of core mechanisms from innate sensing to immune paralysis.
• Development of a practical framework for dynamic immune monitoring.

Main Results:

• Sepsis involves parallel hyperinflammation and low-response programs that shift over time and across compartments.
• Key mechanisms link early innate sensing and endothelial injury to later immune paralysis and chronic critical illness.
• Dynamic immune monitoring, focusing on trends and composite signals, is crucial for interpreting patient states.

Conclusions:

• Sepsis requires a paradigm shift from a uniform inflammatory syndrome to a dynamic immune reprogramming disorder.
• Effective interventions necessitate bidirectional, time-stamped immunomodulation guided by repeated phenotyping.
• Future clinical trials should incorporate enriched enrollment and endpoints reflecting secondary infections and organ recovery trajectories.