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Deep-Sea-Derived Butyrolactone I Suppresses Ovalbumin-Induced Anaphylaxis by Regulating Mast Cell Function in a Murine Model

Liu, Qing-Mei, Xie, Chun-Lan, Gao, Yuan-Yuan, Liu, Bo, Lin, Wei-Xiang, Liu, Hong, Cao, Min-Jie, Su, Wen-Jin, Yang, Xian-Wen, Liu, Guang-Ming
Journal of agricultural and food chemistry 2018 v.66 no.22 pp. 5581-5592
Aspergillus, anaphylaxis, animal models, food allergies, histamine, immunoglobulin E, lymph nodes, mast cells, mice, molecular models, ovalbumin, proteinases, receptors, spleen
Deep-sea-derived butyrolactone I (BTL-I), which was identified as a type of butanolide, was isolated from Aspergillus sp. Ovalbumin (OVA)-induced BALB/c anaphylaxis was established to explore the antifood allergic activity of BTL-I. As a result, BTL-I was able to alleviate OVA-induced allergy symptoms, reduce the levels of histamine and mouse mast cell proteinases, inhibit OVA-specific IgE, and decrease the population of mast cells in the spleen and mesenteric lymph nodes. BTL-I also significantly suppressed mast-dependent passive cutaneous anaphylaxis. Additionally, the maturation of bone marrow-derived mast cells (BMMCs) declined as BTL-I caused down-regulation of c-KIT receptors. Furthermore, molecular docking analyses revealed that BTL-I interacted with the inhibitory receptor, FcγRIIB. In conclusion, the reduction of mast cell function by deep-sea-derived BTL-I as well as its interactions with the inhibitory receptor, FcγRIIB, may contribute to BTL-I-related protection against food anaphylaxis.