Immunosuppression in the Pathophysiology of Sepsis.

Sepsis-induced immunosuppression contributes to mortality, increased susceptibility to secondary infections and long-term complications. Myeloid cells undergo functional reprogramming, while adaptive immune cells, particularly T lymphocytes, show altered composition and lymphopenia. This immunosuppression is driven by several mechanisms. Therapies, including immune-stimulating cytokines, checkpoint inhibitors, and mesenchymal stem cells, are under investigation to restore immune function, but their effectiveness in clinical practice is still unclear.