Abstract:
:Phagocytosis of pathogens by macrophages is crucial for the successful resolution of inflammation induced by microbial infection. Taurine chloramine (TauCl), an endogenous anti-inflammatory and antioxidative substance, is produced by reaction between taurine and hypochlorous acid by myeloperoxidase activity in neutrophils under inflammatory conditions. In the present study, we investigated the effect of TauCl on resolution of acute inflammation caused by fungal infection using a zymosan A-induced murine peritonitis model. TauCl administration reduced the number of the total peritoneal leukocytes, while it increased the number of peritoneal monocytes. Furthermore, TauCl promoted clearance of pathogens remaining in the inflammatory environment by macrophages. When the macrophages isolated from thioglycollate-treated mice were treated with TauCl, their phagocytic capability was enhanced. In the murine macrophage-like RAW264.7 cells treated with TauCl, the proportion of macrophages clearing the zymosan A particles was also increased. TauCl administration resulted in elevated expression of heme oxygenase-1 (HO-1) in the peritoneal macrophages. Pharmacologic inhibition of HO-1 activity or knockdown of HO-1 in the murine macrophage RAW264.7 cells abolished the TauCl-induced phagocytosis, whereas the overexpression of HO-1 augmented the phagocytic ability of macrophages. Moreover, peritoneal macrophages isolated from HO-1 null mice failed to mediate TauCl-induced phagocytosis. Our results suggest that TauCl potentiates phagocytic activity of macrophages through upregulation of HO-1 expression.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Kim W,Kim SH,Jang JH,Kim C,Kim K,Suh YG,Joe Y,Chung HT,Cha YN,Surh YJdoi
10.1016/j.cellimm.2018.02.003subject
Has Abstractpub_date
2018-05-01 00:00:00pages
36-46eissn
0008-8749issn
1090-2163pii
S0008-8749(18)30051-0journal_volume
327pub_type
杂志文章abstract::CD48, the murine homolog of human CD58, binds to CD2 in rats and mice. Whereas inhibition of CD2 signaling leads to profound immunosuppression, no information is available on CD48-targeted therapy in the rat. We could show that anti-CD2 treatment (OX34) efficiently inhibited TCR-driven as well as CD2-mediated prolifer...
journal_title:Cellular immunology
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journal_title:Cellular immunology
pub_type: 杂志文章
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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