Alleviates Colitis via the Regulation of Gut Microbiota.

Gut microbiota are significantly associated with the occurrence and development of inflammatory bowel disease (IBD). saponins (PNS) could be used for colitis and to modulate gut microbiota. However, the mechanism behind the effects of PNS on anti-colitis that are pertinent to gut microbiota is largely unknown. This study aimed to evaluate the anti-colitis effects of PNS and explore the involved mechanism as it is related to gut microbiota. Results showed that PNS significantly alleviated dextran sulfate sodium (DSS)-induced colitis. Meanwhile, after PNS treatment, the tight junction proteins were enhanced and proinflammatory cytokines, such as TNF-[Formula: see text], IL-6, IL-1[Formula: see text], and IL-17, were decreased. Furthermore, were significantly increased after modeling, while PNS reduced their abundance and significantly increased the amount of . Importantly, and were correlated with the IBD disease indicators. Moreover, fecal microbiota transplantation (FMT) experiments confirmed that PNS-reshaped gut microbiota significantly alleviated DSS-induced colitis, while significantly reduced the levels of the LPS-induced cellular inflammatory factors IL-1[Formula: see text] and TNF-[Formula: see text]. In conclusion, PNS alleviated colitis pertinent to the upregulation of and downregulation of . in the gut.