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Immnology of sepsis Eizo WATANABE 1 1Department of Emergency and Critical Care Medicine Aichi Medical University pp.617-625
Published Date 2023/10/1
DOI https://doi.org/10.11477/mf.3102201125
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Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection. Multiple organ failure resulting from sepsis is due to the cumulative dysfunction of cells constituting individual organs. Immunoparalysis in the subacute phase of sepsis is a harmful host response that is challenging to address. In particular, T cell exhaustion leading to apoptosis is recognized as the pivotal pathway of immunoparalysis related to the immune checkpoint mechanism. The immune checkpoint plays a significant pathological role in immunoparalysis, not only in cancer but also in sepsis. Positive co-stimulatory pathways in T cells permit the effector T cells to expand, resist sepsis-induced apoptosis, and clear pathogens. PD-1 activates inhibitory pathways on T cells and broadly enhances immunosuppressive signals across the innate and adaptive immune systems. To counter this immunoparalysis, checkpoint blockade has garnered attention in clinical research on sepsis. It is essential to overcome the lack of scientific data on therapeutic efficacy, criteria for patient inclusion, and immune monitoring methodologies to realize immunotherapy for sepsis in the critical-care setting.


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電子版ISSN 2186-7852 印刷版ISSN 1883-4833 メディカル・サイエンス・インターナショナル

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