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Effect of tyrosinase and caffeic acid crosslinking of turbot parvalbumin on the digestibility, and release of mediators and cytokines from activated RBL-2H3 cells

Ahmed, Ishfaq, Ma, Jiaju, Li, Zhenxing, Lin, Hong, Xu, Lili, Sun, Lirui, Tian, Shenglan
Food chemistry 2019 v.300 pp. 125209
Western blotting, allergens, beta-N-acetylhexosaminidase, caffeic acid, cell lines, crosslinking, digestibility, enzymatic hydrolysis, fish products, gastric juice, histamine, hypersensitivity, in vitro digestion, interleukin-13, interleukin-4, intestines, leukemia, leukotrienes, prostaglandins, rats, tryptase, turbot
Turbot can induce allergy in susceptible individuals due to the presence of parvalbumin (PV), a major fish allergen. This study aimed at evaluating the digestibility and the ability of PV to elicit the release of cellular degranulation, following treatment with tyrosinase (PV-Tyr), caffeic acid (PV-CA) and in combination (PV-Tyr/CA), using in vitro digestion and RBL-2H3 (passive rat basophil leukemia) cell line. The digestion assay products revealed that the stability of PV in simulated gastric fluid (SGF) was stronger, while in simulated intestinal fluid (SIF) was rather weak. Western blot analysis revealed that the IgG-binding abilities of the cross-linked PV were markedly reduced. Moreover, crosslinking hampered the release of cellular degranulation process in RBL-2H3 cell lines. PV-Tyr/CA showed highly significant reduction in the release rate of β-hexosaminidase (66.02%), histamine (35.01%), tryptase (29.25%), cysteinyl leukotrienes (29.72%), prostaglandin D2 (34.96%), IL-4 (43.99%) and IL-13 (38.93%) and shown potential in developing hypoallergenic fish products.