Traditional Chinese Medicine Ganshuang Granules Attenuate CCl4‐Induced Hepatic Fibrosis by Modulating Gut Microbiota

Abstract Gut dysbiosis contributes to hepatic fibrosis. Emerging evidence revealed the major role of traditional Chinese medicine (TCM) in gut microbiota homeostasis. Here, we aimed to investigate the anti‐fibrotic activity and underlying mechanism of ganshuang granules (GS), particularly regarding gut microbiota homeostasis. CCl 4 ‐induced hepatic fibrosis models were allocated into 4 groups receiving normal saline (model), 1.0, 2.0, or 4.0 g/kg GS for 5 weeks. As result, GS treatment alleviated liver injury in CCl 4 ‐induced hepatic fibrosis, presenting as decreases of the liver index, alanine aminotransferase, and aspartate transaminase. Histological staining and expression revealed that the enhanced oxidative stress, inflammatory and hepatic fibrosis in CCl 4 ‐induced models were attenuated by GS. Immunohistochemical staining showed that tight junction‐associated proteins in intestinal mucosa were up‐regulated by GS. 16S rRNA sequencing showed that GS rebalanced the gut dysbiosis manifested as improving alpha and beta diversity of gut microbiota, reducing the ratio of Firmicutes to Bacteroidetes, and regulating the relative abundance of various bacteria. In summary, GS decreased the intestinal permeability and rebalanced the gut microbiota to reduce the oxidative stress and inflammation, eventually attenuating CCl 4 ‐induced hepatic fibrosis.