Bioactive Dairy-Fermented Products and Phenolic Compounds: Together or Apart

Area of Science:

• Food Science
• Nutritional Biochemistry
• Computational Biology

Background:

• Fermented dairy products offer health benefits due to their bioactivity and reduced immunoreactivity.
• Plant-derived polyphenols (e.g., flavonoids, phenolic acids) are known for their anti-inflammatory and chronic disease-reducing properties.
• Combining dairy proteins with polyphenols is explored to enhance bioactivity and create novel functional ingredients.

Purpose of the Study:

• To investigate the conjugation of specific polyphenols (EGCG, CGA) with milk proteins (e.g., α-lactalbumin, β-lactoglobulin, caseins).
• To assess the potential of these protein-polyphenol conjugates to reduce milk protein allergenicity.
• To explore the role of these conjugates as metabolic prebiotics and their impact on gut microbiota.

Main Methods:

• In silico docking simulations were employed to model protein-polyphenol interactions.
• Analysis of conjugate structures and predicted consequences of interactions.
• Evaluation of potential prebiotic effects and impact on bacterial growth (pathogenic vs. beneficial).

Main Results:

• Epigallocatechin-3-gallate (EGCG) and chlorogenic acid (CGA) exhibit a predisposition to bind with major milk proteins.
• The formation of protein-polyphenol conjugates is predicted to alter protein structures and potentially reduce allergenicity.
• Conjugates show potential as metabolic prebiotics, promoting beneficial gut bacteria and inhibiting pathogenic ones.

Conclusions:

• Dairy protein-polyphenol conjugates represent a promising strategy for developing hypoallergenic dairy products with enhanced health benefits.
• These conjugates may serve as functional ingredients, modulating the gut microbiome and exerting anti-inflammatory effects.
• In silico methods are valuable tools for predicting the structure and function of novel food-derived bioactives.