Targeting Lachnospiraceae through diet: A functional food approach to combat food allergy

Abstract

Background

The strain-specific roles of Lachnospiraceae in food allergy (FA) pathogenesis position this family as a promising therapeutic target. However, its pronounced functional heterogeneity and oxygen sensitivity impose significant barriers to functional food development.

Scope and approach

This review critically synthesizes clinical and experimental evidence correlating altered Lachnospiraceae profiles with FA pathogenesis. We integrate analyses of dietary strategies that orchestrate host immunity via microbial metabolites—principally short-chain fatty acids (SCFAs)—while evaluating delivery platforms and clinical translation pathways for functional food applications.

Key findings and conclusions

Lachnospiraceae strains exhibit profound functional diversity regarding FA protection. Specific dietary constituents (e.g., resistant starches, polyphenols, and N-acetylneuraminic acid) selectively propagate therapeutically relevant strains. These isolates exert anti-allergic effects via synergistic mechanisms, including the fortification of intestinal barrier integrity and the induction of regulatory T-cell differentiation. However, some effective interventions coincide with a reduction in aggregate Lachnospiraceae abundance, highlighting the divergence between taxonomic load and functional output and necessity for strain-level characterization. To bridge the translational gap, future research must prioritize: (1) establishing causal strain-function linkages through integrated multi-omics and gnotobiotic validation; (2) optimizing metabolic performance via precision synbiotic formulations rather than generic dietary modulation; and (3) developing scalable, biomimetic encapsulation systems to ensure the viability and functional engraftment of these oxygen-sensitive anaerobes. Addressing these challenges will catalyze the development of precision Lachnospiraceae-based functional foods for FA management.