Comprehensive Effect of Carbon Tetrachloride and Reversal of Gandankang Formula in Mice Liver: Involved in Oxidative Stress, Excessive Inflammation, and Intestinal Microflora

Aim: To systematically evaluate the effect of Gandankang (GDK) aqueous extract in alleviating acute and chronic liver injury. Forty-one chemical compounds were identified by ultra-high performance liquid chromatography-linear trap quadrupole-orbitrap-tandem mass spectrometry (UHPLC-LTQ-Orbitrap-MS) from GDK. All dosages of GDK and Biphenyl diester (BD) improved CCl4-induced acute and chronic liver injury. GDK curbed liver fibrosis and blocked the NF-kappa B pathway to effectively inhibit the hepatic inflammatory response. Additionally, GDK treatment reduced the abundance of Phascolarctobacterium, Turicibacter, Clostridium_xlva, Atoprostipes, and Eubacterium, in comparison with those in the CCl4 mice and elevated the abundance of Megamonas and Clostridium_IV as evident from 16S rDNA sequencing. Correlation analysis showed that the abundance of Eubacterium and Phascolarctobacterium was positively correlated with inflammation, fibrosis, and oxidation indexes. This indicates that GDK ameliorates chronic liver injury by mitigating fibrosis and inflammation. Nrf2 pathway is the key target of GDK in inhibiting liver inflammation and ferroptosis. Eubacterium and Phascolarctobacterium played a vital role in attenuating liver fibrosis.