Protein-bound Vaccinium fruit polyphenols decrease IgE binding to peanut allergens and RBL-2H3 mast cell...

Area of Science:

• Food Science
• Allergy Research
• Phytochemistry

Background:

• Peanut allergy is a significant global health issue.
• Plant-derived polyphenols possess natural binding properties to proteins.
• Developing stable protein-polyphenol complexes could mitigate allergic reactions.

Purpose of the Study:

• To create stable protein-polyphenol complexes using peanut proteins and cranberry or blueberry polyphenols.
• To evaluate the impact of these complexes on peanut protein allergenicity.
• To investigate the potential of these modified proteins as a hypoallergenic food ingredient.

Main Methods:

• Formation of protein-polyphenol complexes from peanut proteins and cranberry/blueberry pomace polyphenols.
• Characterization and quantification of bound and free polyphenols.
• Immunoblotting with allergic plasma to assess IgE binding.
• In vitro degranulation assays using RBL-2H3 mast cells to measure histamine and β-hexosaminidase release.

Main Results:

• Quercetin was identified as the primary phytochemical covalently bound to peanut proteins.
• Peanut protein-polyphenol complexes significantly reduced IgE binding to peanut proteins (38% for cranberry, 31% for blueberry).
• Complexes markedly inhibited ionomycin-induced histamine (65.5-65.8% decrease) and β-hexosaminidase (60.7-45.4% decrease) release from mast cells.

Conclusions:

• Modification of peanut proteins with cranberry or blueberry polyphenols significantly reduces their allergenic potential.
• The resulting protein-polyphenol complexes demonstrate reduced IgE binding and mast cell degranulation.
• These findings suggest a promising approach for developing hypoallergenic peanut-based products.