Salmonellae are one of the most important foodborne pathogens, which threaten the health of humans and animals severely.
Glycyrrhizin (GL) has been proven to exhibit anti-inflammatory and tissue-protective properties. Here, we investigated the effects of GL on tissue injury, inflammatory response, and intestinal
dysbiosis in Salmonella Typhimurium-infected mice. Results showed that GL or
gentamicin (GM) significantly (P < 0.05) alleviated ST-induced
splenomegaly indicated by the decreased spleen index, injury of liver and jejunum indicated by the decreased hepatocytic apoptosis, and the increased jejunal villous height. GL significantly (P < 0.05) increased secretion of inflammatory
cytokines (IFN-γ, IL-12p70, IL-6, and IL-10) in spleen and
IL-12p40 mRNA expression in liver. Meanwhile, GL or GM pre-
infection treatments significantly (P < 0.05) decreased ST-induced pro-inflammatory
cytokine (IFN-γ, TNF-α, and IL-6) expression in both spleen and liver and increased (P < 0.05) anti-inflammatory
cytokine IL-10 secretion in spleen. Furthermore, GL or GM pre-
infection treatment also regulates the diversities and compositions of intestinal microbiota and decreased the negative connection among the intestinal microbes in ST-infected mice. The above findings indicate that GL alleviates ST-induced
splenomegaly, hepatocytic apoptosis, injury of jejunum and liver, inflammatory response of liver and spleen, and intestinal
dysbacteriosis in mice.