Plant sugars talk to your gut bacteria and immune cells
Cheng H, Wen J, Jia Q, Luo L, Li Y
Medicinal Plants
The mushrooms, seaweed, and medicinal herbs you might grow or forage owe part of their reputed immune-boosting power to complex sugars that feed your gut bacteria and directly signal your immune cells.
Many plants make complex sugar chains called polysaccharides, found in things like mushrooms, aloe, and various roots and seeds. This review pulls together research showing these plant sugars can calm down or rev up the immune system, partly by changing which bacteria live in your gut and what those bacteria produce. The exact shape, size, and chemical decorations on the sugar chain determine whether it acts more like a soothing agent or an immune booster, which matters for anyone interested in medicinal plants or fermented foods.
Key Findings
Plant polysaccharides regulate immune signaling pathways including TLR-NF-κB/MAPK, JAK-STAT, and cGAS-STING to either calm or activate the immune response.
These sugars reshape gut microbiota and boost beneficial metabolites like short-chain fatty acids and tryptophan derivatives, indirectly reducing systemic inflammation.
Structural traits (molecular weight, mannose/arabinogalactan/uronic acid content, degree of branching, and modifications like sulfation or phosphorylation) determine whether a polysaccharide fights inflammation or boosts immunity, pointing toward future 'rational design' of therapeutic plant sugars.
chevron_right Technical Summary
Plant polysaccharides, the complex sugar molecules found in many plants, can retrain the immune system by feeding gut bacteria and directly signaling immune cells, offering a natural way to fight inflammation, allergies, and even cancer.
Abstract Preview
Original paper
Orchestrating immunity and beyond: polysaccharides as multi-target regulators of inflammatory networks via gut microbiota and structure-dependent pathways.
Natural polysaccharides (NPs), as key bioactive constituents of many plants, have garnered significant attention due to their immunomodulatory properties and high safety profile. This review elucid...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Ancient Amazonian forests were planted and tended by Indigenous farmers
Forests and fruits we romanticize as wild — including many plants now in our kitchens and gardens — may exist in their current abundance precisely because an...
Gut microbiota comprise the diverse microbial communities residing in animal digestive systems that profoundly affect their host's nutrient metabolism, disease resistance, and physiological function. For plant science, this concept extends to understanding the microbiota inhabiting plant tissues
arrow_forward Explore topic