Abstract
Ulcerative colitis (UC) is a complex chronic inflammatory disease closely associated with gut homeostasis dysfunction. The previous studies have shown that stachyose, a functional food additive, has the potential to enhance gut health and alleviate UC symptoms. However, the underlying mechanism of its effects remains unknown. In this study, our findings showed that dietary supplements of stachyose had a significant dose-dependent protective effect on colitis symptoms, regulation of gut microbiota, and restoration of the Treg/Th17 cell balance in dextran sulfate sodium (DSS) induced colitis mice. To further validate these findings, we conducted fecal microbiota transplantation (FMT) to treat DSS-induced colitis in mice. The results showed that microbiota from stachyose-treated mice exhibited a superior therapeutic effect against colitis and effectively regulated the Treg/Th17 cell balance in comparison to the control group. Moreover, both stachyose supplementation and FMT resulted in an increase in butyrate production and the activation of PPARγ. However, this effect was partially attenuated by PPARγ antagonist GW9662. These results suggested that stachyose alleviates UC symptoms by modulating gut microbiota and activating PPARγ. In conclusion, our work offers new insights into the benefical effects of stachyose on UC and its potential role in modulating gut microbiota.
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