期刊
FRONTIERS IN IMMUNOLOGY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2019.01103
关键词
antiallergy; Fc epsilon RI beta; Lyn; mast cell; scrodentoid A
类别
资金
- National Natural Science Foundation of China [81673570]
- Excellent Academic Leaders Program of Shanghai [16XD1403500]
- Shanghai Sail Program
- China Postdoctoral Science Foundation [2018M642067]
- programs of High level University Innovation Team and Shanghai E-Research Institute of Bioactive Constituents in Traditional Chinese Medicine
Background: Mast cells are considered an attractive therapeutic target for treating allergic diseases, and the Lyn-Fc epsilon RI beta interaction is essential for mast cell activation. This study investigated the antiallergic effect of scrodentoid A (SA) on mast cells and mast cell-mediated anaphylaxis. Methods: For in vitro experiments, mast cells were treated with SA. Cell proliferation was tested using the XTT assay. The mRNA expression of various cytokines and chemokines was measured using qPCR. The levels of histamine, eicosanoids (PGD(2), LTC4), and cytokines were measured using enzyme immunoassay kits. Signaling was investigated using Western blotting and immunoprecipitation. For in vivo experiments, the antiallergic activity of SA was evaluated using two mouse models of passive anaphylaxis as passive cutaneous and systemic anaphylaxis. The mechanism was investigated through immunohistochemistry and immunofluorescence. Results: SA considerably inhibited immunoglobulin (Ig) E-mediated mast cell activation, including beta-hexosaminidase release, mRNA and protein expression of various cytokines, and PGD(2) and LTC4 release. Oral administration of SA effectively and dose-dependently suppressed mast cell-mediated passive cutaneous and systemic anaphylaxis. SA significantly attenuated the activation of Lyn, Syk, LAT, PLC gamma, JNK, Erk1/2, and Ca(2+ )mobilization without Fyn, Akt, and P38 activation by blocking the Lyn-Fc epsilon RI beta interaction. Conclusions: SA suppresses mast cell-mediated allergic response by blocking the Lyn-Fc epsilon RI beta interaction in vitro and in vivo. SA may be a promising therapeutic agent for allergic and other mast cell-related diseases.
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