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Immunology of persistent inflammation, immunosuppression, and catabolic syndrome Shigeaki INOUE 1 1Department of Emergency and Intensive Care Medicine School of Medicine, Wakayama Medical University pp.581-588
Published Date 2023/10/1
DOI https://doi.org/10.11477/mf.3102201122
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Persistent inflammation, immunosuppression, and catabolism syndrome (PIICS) is a syndrome characterized by persistent inflammation, immunosuppression, and catabolism following severe illness. Its definition includes long-term hospitalization (>14 days), inflammation (CRP>150μg/dL), immunosuppression (lymphocyte count <800/mm3), and weight loss despite adequate nutrition intake (loss of >10% of lean body weight during hospitalization, or BMI <18 and serum albumin <3.0g/dL). There are many unknowns in the pathophysiology of PIICS following sepsis or trauma, but it is thought to bring about various immunological changes, such as the proliferation and activation of bone marrow-derived suppressor cells due to decreased emergency bone marrow hematopoiesis, T cell exhaustion, and an increase in regulatory T cells. As a treatment for PIICS, the application of cytokine therapies like IL-7 and immune therapies using checkpoint inhibitors are being considered. Enteral nutrition has been shown to help reduce infections and shorten hospital stays, suggesting that appropriate nutritional therapy and rehabilitation may hold potential in the prevention of PIICS.


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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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