Polysaccharide A

Polysaccharide A (PSA) is a polysaccharide produced by the Gram-negative bacterium Bacteroides fragilis.

[2] PSA colonization of B. fragilis in the gut mucosa induces regulatory T cells and suppresses pro-inflammatory T helper 17 cells.

[2] PSA has been shown to protect animals from experimental diseases like colitis, asthma, or pulmonary inflammation.

[2] Nonetheless, PSA can be pro-inflammatory as well as anti-inflammatory.

[3] This microbiology-related article is a stub.