Molecular Mechanisms of Polysaccharides in Regulating Immune Function and Treating Rheumatoid Arthritis Through Modulation of Gut Microbiota.
Huang K, Xie J, Zhang F
Medicinal Plants
The fibrous structural carbohydrates in roots, stems, and seed coats of plants you grow or forage — chicory, burdock, garlic, seaweed — are being seriously studied as medicines that work by reshaping the community of bacteria living in your gut.
Certain plant-based complex sugars — the same type of tough material that gives plant cell walls their structure — can change which bacteria thrive in our digestive system. When those gut bacteria break down the plant compounds, they release small molecules that help the immune system stop attacking the body's own joints. Scientists reviewed the research and found real effects, but most studies were done in mice, so we still need bigger human trials to know how well this works for people.
Key Findings
Plant polysaccharides with a specific chemical structure (β-1,4 glycosidic bonds, common in plant cell walls) boosted beneficial gut bacteria like Bifidobacterium and Lactobacillus by 15–30%.
Bacterial digestion of these plant compounds increased gut concentrations of short-chain fatty acids — key anti-inflammatory molecules — by more than 20%.
Despite promising mechanisms, nearly all evidence comes from lab cell cultures or collagen-induced arthritis mouse models; human clinical trials remain small and lack long-term follow-up.
chevron_right Technical Summary
A systematic review finds that plant-derived polysaccharides — complex carbohydrates from plant cell walls — can ease rheumatoid arthritis by selectively feeding beneficial gut bacteria, which then produce anti-inflammatory compounds that quiet the immune attack on joints. The evidence is promising but still largely from animal studies, not large human trials.
Abstract Preview
To clarify the core mechanisms by which polysaccharides treat rheumatoid arthritis (RA) via gut microbiota modulation, and to systematically summarize their regulatory network and therapeutic poten...
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