Fig. 5. Overview of nanoparticle-mediated modulation of the mucosal immune system and microbiota.
Within the mucosal environment, NPs enhance probiotic viability, suppress pro-inflammatory cytokines (e.g., TNF-α, IL-1, IL-6), promote sIgA production, maintain epithelial barrier integrity, and modulate local immune cell activity. NPs can accumulate at inflamed sites via the enhanced permeability and retention (EPR) effect, thereby facilitating targeted therapeutic delivery.
