ObjectiveTo explore whether stachyose can effectively inhibit the colonization of Clostridium difficile in intestinal tract of mice and analyze the structural change of the intestinal flora using C. difficile infection mouse model.
MethodsC57BL/6 female mice were randomly divided into three groups, one group did not receive any treatment (blank group), and the other two groups were daily administrated with stachyose (stachyose group) and phosphate buffered saline (PBS) (PBS group) respectively for 10 days after C. difficile infection. On day 10 after infection, the content of C. difficile in feces was measured with real-time polymerase chain reaction (PCR) and the variation of intestinal flora in mice in different groups was analyzed with 16S rRNA sequencing technique.
ResultsOn day 10 after infection, stachyose significantly decreased the colonization of C. difficile in intestinal tract the mice infected with C. difficile. The 16S rRNA sequencing result showed that the ACE index of stachyose group was significantly higher than that of PBS group, but it did not return to normal level. At the phylum level, stachyose treatment resulted in a significant increase in the relative abundance of Bacteroidetes and Firmicutes and a significant decrease in the relative abundance of Proteobacteria in C. difficile-infected mice. At the species level, stachyose treatment resulted in a significant increase in the relative abundance of Parabacteroides goldsteinii, Blautia hansenii, Bacteroides thetaiotaomicron and a significant decrease in the relative abundance of Parasutterella excrementihominis, Parabacteroides distasonis.
ConclusionStachyose treatment can effectively reduce the colonization of C. difficile, restore the richness of intestinal flora in intestinal tract of the mice in mice infected with C. difficile, especially the relative abundance of several bacteria, such as Bacteroides thetaiotaomicron and Parabacteroides goldsteinii.
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