Reducing the Allergenicity of ß-Lactoglobulin by Covalent Modification with Different Contents of Epigallocatechin Gallate (EGCG): In Vitro and In Vivo Studies.
J Agric Food Chem
; 72(31): 17549-17558, 2024 Aug 07.
Article
in En
| MEDLINE
| ID: mdl-39054671
ABSTRACT
ß-Lactoglobulin (ßLG) is a major allergen in bovine milk protein. This study was designed to investigate changes in ßLG structure, digestibility, and allergenicity induced by covalent binding modification with different contents of (-)-epigallocatechin 3-gallate (EGCG). The reaction of EGCG conjugation with ßLG reached saturation at a molar ratio of 160 ßLGEGCG. Conjugation with EGCG altered the ßLG structure, decreased IgE-binding capacity, and increased digestibility in a dose-dependent manner. In vivo studies showed that covalent conjugation with EGCG can reduce ßLG-induced allergic symptoms with reducing levels of IgE, histamine, and mast cell protease-1 (mMCP-1) and the percentage of sensitized mast cells. Allergenicity was reduced more effectively in saturated ßLG-EGCG conjugates compared to semisaturated conjugates. Observed changes in IFN-γ, IL-4, IL-5, IL-10, and TGF-ß levels suggested that ßLG-EGCG conjugates were able to promote Th1/Th2 immune balance. These findings further our understanding of the relationship between the degree of polyphenol conjugation and the allergenicity of food allergens.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Immunoglobulin E
/
Allergens
/
Catechin
/
Lactoglobulins
Limits:
Animals
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Female
/
Humans
Language:
En
Journal:
J Agric Food Chem
Year:
2024
Document type:
Article