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Non-covalent binding of whey protein isolate after ultrasound pretreatment to epigallocatechin gallate: Effects on immune response and gut microbiota in BALB/c mice.
International Journal of Biological Macromolecules 2023 June 10
Cow's milk is one of the "big eight" most common allergenic foods, and β-lactoglobulin and α-Lactalbumin in whey protein are two major allergens of cow's milk protein. An effective strategy for reducing the allergenicity of whey protein is needed. In the present study, protein-EGCG complexes were obtained through non-covalent interactions between untreated or sonicated whey protein isolate (WPI) and epigallocatechin gallate (EGCG), and the allergenicity of complexes was assessed in vivo. The results showed that SWPI-EGCG complex possesses low allergenicity in BALB/c mice. As compared with untreated WPI, SWPI-EGCG complex had less effect on the body weight and organ indexes. Moreover, SWPI-EGCG complex could alleviate the WPI induced allergic reactions and intestinal damage of mice by decreasing the secretion of IgE, IgG, histamine, mMCP-1, modulating the balance of Th1/Th2 and Treg/Th17 response, and increasing the diversity of intestinal flora and the relative abundances of probiotic bacteria. These findings indicate that the interaction of sonicated WPI with EGCG could reduce the allergenicity of WPI, which could provide a new strategy for reducing food allergenicity.
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