Flagellin maintains eosinophils in the intestine
| Autor: | Gui Yang, Qin Wang, Shao-Bo Yang, Qiao-Ruo Jin, Ping-Chang Yang, Xiaodan Lv, Qing Chang, Hua-Zhen Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Immunology
medicine.disease_cause Biochemistry Leukocyte Count Mice Immune system Mediator Antigen medicine Immunology and Allergy Animals Molecular Biology biology Chemistry Chymase Hematology Eosinophil Cell biology Eosinophils Intestines medicine.anatomical_structure TLR5 Allergic response biology.protein Flagellin Food Hypersensitivity |
| Zdroj: | Cytokine. 150 |
| ISSN: | 1096-0023 |
| Popis: | Eosinophils (Eos) are the major effector cells in allergic response. The regulation of Eo is not fully understood yet. Flagellin (FGN) has immune regulatory functions. This study aims to elucidate the role of FGN in maintaining Eo at the static status in the intestinal tissues. A mouse food allergy (FA) model was developed. Eo mediator levels in the serum or culture supernatant or intestinal lavage fluids were assessed and used as an indicator of Eo activation. The results showed that less FGN amounts were detected in the FA mouse intestinal tissues, that were negatively correlated with the Eo activation. Mast cell-derived chymase bound FGN to induce FGN degradation. FGN formed complexes with FcγRI on Eos to prevent specific antigens from binding FcγRI, and thus, to prevent Eo activation. Administration of FGN efficiently alleviated experimental FA. In conclusion, FGN plays a critical role in maintaining Eos at static status in the intestine. Administration of FGN can alleviate experimental FA. FGN may be a novel drug candidate to be used in the treatment of Eo-related diseases. |
| Databáze: | OpenAIRE |
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