Effects of garlic polysaccharide on alcoholic liver fibrosis and intestinal microflora in mice

CONTEXT: Alcoholic liver fibrosis (ALF) is treatable and reversible consequence of liver disease. Intestinal microflora plays an important role in the progression of liver disease. Garlic (Allium sativum L. [Amaryllidaceae]) has been consumed as a traditional medicine to treat liver injury. OBJECTIVE: To investigate the effects of garlic polysaccharide (GP) on ALF and intestinal microflora in mice. MATERIALS AND METHODS: KM mice were orally administered with alcohol (56%, 6 mL/kg) for 30 d to establish ALF model, and divided into four groups together with control group (water only). Hugan tablet (60 mg/kg) or GP (250 and 150 mg/kg) were given 5 h after each dose of alcohol. Biochemical markers in serum and liver homogenate were determined with kits. Alteration of intestinal microflora, and protein expressions of TGF-β1, TNF-α and decorin were detected. RESULTS: In GP-H group, ALT and AST decreased to 18.85 ± 4.71 U/L and 40.84 ± 7.89 U/L. MDA, TC, TG and LDL-C decreased to 2.32 ± 0.86 mmol/mg, 0.21 ± 0.12 mmol/L, 0.96 ± 0.31 mmol/L and 0.084 ± 0.027 mmol/L. SOD, GSH-Px and GSH increased to 118.32 ± 16.32 U/mg, 523.72 ± 64.20 U/mg and 0.56 ± 0.05 mg/g. Ratios of TGF-β1 and TNF-α decreased to 0.608 ± 0.170 and 1.057 ± 0.058, decorin increased to 2.182 ± 0.129. Lachnospiraceae and Lactobacillus increased, Facklamia and Firmicutes decreased with GP pretreatment. DISCUSSION AND CONCLUSIONS: Intestinal microflora provides novel insight into the mechanisms of GP that may be used to treat ALF and intestinal microflora dysbiosis.