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Abstract Title:

The Parenteral Vitamin C Improves Sepsis and Sepsis-Induced Multiple Organ Dysfunction Syndrome via Preventing Cellular Immunosuppression.

Abstract Source:

Mediators Inflamm. 2017 ;2017:4024672. Epub 2017 Jan 22. PMID: 28210072

Abstract Author(s):

Yu-Lei Gao, Bin Lu, Jian-Hua Zhai, Yan-Cun Liu, Hai-Xia Qi, Ying Yao, Yan-Fen Chai, Song-Tao Shou

Article Affiliation:

Yu-Lei Gao

Abstract:

Cellular immunosuppression appears to be involved in sepsis and sepsis-induced multiple organ dysfunction syndrome (MODS). Recent evidence showed that parenteral vitamin C (Vit C) had the ability to attenuate sepsis and sepsis-induced MODS. Herein, we investigated the impact of parenteral Vit C on cellular immunosuppression and the therapeutic value in sepsis. Using cecal ligation and puncture (CLP), sepsis was induced in WT and Gulo(-/-) mice followed with 200 mg/Kg parenteral Vit C administration. The immunologic functions of CD4(+)CD25(+) regulatory T cells (Tregs) and CD4(+)CD25(-) T cells, as well as the organ functions, were determined. Administration of parenteral Vit C per se markedly improved the outcome of sepsis and sepsis-induced MODS of WTand Gulo(-/-) mice. The negative immunoregulation of Tregs was inhibited, mainly including inhibiting the expression of forkhead helix transcription factor- (Foxp-) 3, cytotoxic T lymphocyte associated antigen- (CTLA-) 4, membrane associated transforming growth factor-β (TGF-β(m+)), and the secretion of inhibitory cytokines [including TGF-β and interleukin- (IL-) 10], as well as CD4(+) T cells-mediated cellular immunosuppression which was improved by parenteral Vit C in WT and Gulo(-/-) septic mice. These results suggested that parenteral Vit C has the ability to improve the outcome of sepsis and sepsis-induced MODS and is associated with improvement in cellular immunosuppression.

Study Type : Animal Study

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Sayer Ji
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