Exploring dried ginger essential oil as a therapeutic strategy for 5-FU-induced mucositis: Gut microbiota and tryptophan metabolite IAA-AHR/IL-22/STAT3 signaling axis.

ETHNOPHARMACOLOGICAL RELEVANCE: 5-Fluorouracil (5-FU) commonly induces severe mucositis, causing pain, inflammation, and gastrointestinal dysfunction, which significantly increases patient morbidity and reduces quality of life. In Ayurveda, Traditional Chinese Medicine, and other ethnopharmacological practices, dried ginger has been widely used to alleviate symptoms such as nausea, vomiting, diarrhea, and inflammation, highlighting its important role in traditional medicine.

AIM OF THE STUDY: This study explored the potential of dried ginger essential oil (DGEO) in mitigating intestinal epithelial barrier damage in mice with mucositis induced by 5-FU.

METHODS

The therapeutic effects of DGEO were evaluated by measurements of weight changes, diarrhea scores, ELISA, and H&E. Further investigations included 16S rRNA sequencing, untargeted metabolomics, molecular docking, and HPLC-MS/MS to explore its underlying mechanisms, with validation performed using western blotting and ELISA.

RESULTS

The results demonstrated that DGEO was effective in alleviating mucositis symptoms. It also improved the gut microbiota, enhanced the biotransformation of tryptophan to indole-3-acetic acid (IAA), and elevated the protein expressions of the AHR, CYP1A1, and p-STAT3, as well as level of IL-22. Moreover, DGEO improved the expressions of tight junction (TJ) proteins and anti-apoptotic proteins, enhancing intestinal barrier integrity.

CONCLUSION

These findings indicated that DGEO ameliorated 5-FU-induced mucositis by modulating gut microbiota and the tryptophan metabolite IAA-AHR/IL-22/STAT3 signaling axis, providing new insights into its therapeutic applications, particularly its ability to regulate gut microbiota and related signaling pathways.