Sepsis is a life-threatening organ dysfunction caused by the imbalance of host immune response to infection,which immune regulation mechanism is complex and has not been clarified.Programmed death receptor-1(PD-1)/programmed death recep-tor ligand-1(PD-L1)is a negative co-inhibitory molecule that has attracted much attention in recent years.Studies have shown that PD-1/PD-L1 signaling pathway plays an important immunosuppressive role in sepsis.There are differences in immune regulation mecha-nisms in heart,liver,spleen,lung and kidney,which has not been clarified.Immune regulation of PD-1/PD-L1 in different organs of sepsis is reviewied in this article,which could to provide a new direction for the study of sepsis.
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