Intestinal Barrier Function Modulation through Dietary Compounds

The intestinal barrier is a dynamic interface that combines a single layer of epithelial cells, a complex network of tight junction proteins and a mucous layer enriched in antimicrobial peptides and immunoglobulins. This barrier governs selective nutrient absorption while restricting the entry of pathogens and toxins. Dietary compounds—including plant-derived polyphenols, prebiotic fibres, specific amino acids, fatty acids and bioactive peptides—have been shown to influence barrier integrity through multiple, often interrelated, mechanisms. Polyphenols such as chlorogenic acid modulate cell signalling pathways to enhance tight junction protein expression and suppress pro-inflammatory cytokines. Prebiotic fibres and polysaccharides foster the growth of beneficial bacterial taxa that generate short-chain fatty acids, notably butyrate, which serves as an energy source for enterocytes and tightens paracellular permeability. Amino acids like glutamine promote mucin production and epithelial restitution. Such interventions offer promising routes to prevent or ameliorate conditions marked by barrier dysfunction—from inflammatory bowel disorders to livestock production challenges—by harnessing diet-driven cross-talk between host cells and the gut microbiota.

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Intestinal Barrier Function Modulation through Dietary Compounds publication trend

The graph below shows the total number of articles in intestinal barrier function modulation through dietary compounds across all publications each year (not limited to Nature Index journals).

Technical terms

Intestinal barrier: The combined physical and immunological defence formed by epithelial cells, mucus and immune mediators that regulates passage of luminal contents.

Tight junction proteins: A complex of membrane-associated proteins (including occludin, claudins and zonula occludens) that seal gaps between adjacent epithelial cells to control paracellular permeability.

Gut microbiota: The diverse community of bacteria, archaea, fungi and viruses residing in the gastrointestinal tract, which influences host metabolism, immunity and barrier integrity.

Short-chain fatty acids (SCFAs): Microbial fermentation products (such as acetate, propionate and butyrate) that serve as fuels for colonocytes and modulate inflammatory and barrier-related signalling.

Dysbiosis: A disruption or imbalance in the composition or function of the gut microbiota associated with disease states or compromised barrier function.

References

1. Effects of dietary chlorogenic acid on cecal microbiota and metabolites in broilers during lipopolysaccharide-induced immune stress. Frontiers in Microbiology (2024).
2. Dietary Supplementation with Chlorogenic Acid Enhances Antioxidant Capacity, Which Promotes Growth, Jejunum Barrier Function, and Cecum Microbiota in Broilers under High Stocking Density Stress. Animals (2023).
3. Chlorogenic acid improves growth performance of weaned rabbits via modulating the intestinal epithelium functions and intestinal microbiota. Frontiers in Microbiology (2022).