Background
Natural polysaccharides are bioactive macromolecules that regulate gut-derived multi-axis networks, offering systemic therapeutic potential. Their structural diversity enables modulation of microbial, immune, neural and metabolic pathways. As gut dysbiosis is increasingly linked to systemic diseases, understanding polysaccharide-mediated gut-organ axis regulation has become crucial for developing novel interventions targeting systemic disease.
Scope and approach
This review examines polysaccharide mechanisms in microbiota modulation, barrier repair, and cross-organ communication via neural (vagus nerve), immune (Th17/Treg) and metabolic (SCFAs, bile acids) pathways. We analyze therapeutic applications across gut-brain, gut-lung, gut-liver, gut-kidney, gut-mammary, gut-bone, gut-skin, and gut-muscle axes, as well as chemical modifications (sulfation, carboxymethylation, selenylation, acetylation) that enhance bioactivity. The integration of multi-omics and precision engineering for next-generation polysaccharide drug development is also explored.
Key findings and conclusions
Polysaccharides restore gut homeostasis and exert systemic effects, alleviating neurodegenerative diseases (gut-brain), respiratory diseases (gut-lung), hepatic disorders (gut-liver), renal disorders (gut-kidney), mammary disorders (gut-mammary), skeletal disorders (gut-bone), dermatological disorders (gut-skin), and exercise-induced fatigue (gut-muscle). Chemical modifications optimize targeting and efficacy. Multi-omics approaches enable precision engineering of polysaccharide therapeutics. These findings position gut-centric polysaccharide regulation as a transformative strategy for systemic diseases, with optimized structures and systems biology approaches unlocking their full clinical potential across multiple organ system.
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