Abstract: Objective To investigate the stable animal model of carbon tetrachloride (CCl4)-induced acute liver injury in mice, which is convenient for the research and application of new clinical drugs. Methods The Kunming (KM) mice were randomLy divided into blank group, model group, and bifendate group (5.625 mg/kg), and the acute liver injury of mice was replicated by intraperitoneal injection of 0.1% CCl4 solution. The aminotransferase level, liver index, and pathological changes of liver tissue at 3h, 6h, 12h, and 24h after modeling were detected to study the stability of the model. Results After exposure to the model group, alanine aminotransferase (ALT) increased slightly at 3 h [(45.21 ± 13.17) IU/L, P<0.01], and increased significantly at 12 h [(112.30 ± 30.54) IU/L] and 24 h [(121.98 ± 21.66) IU/L] (both P<0.01); AST increased at 3 h [(162.51 ± 28.57) IU/L], 6 h [(192.07 ± 31.05) IU/L], 12 h [(250.75 ± 90.82) IU/L] and 24 h [(274.27 ± 44.02) IU/L] (all P<0.01), but increased significantly at 12 and 24 h; liver index slightly increased at 3 h [(6.72 ± 1.90) g/100 g] and 6h [(6.72 ± 1.90) g/100 g] (both P<0.01). At 12 h [(12.41 ± 1.18) g/100 g] and 24 h [(14.90 ± 2.56) g/100 g] (both P<0.01), the liver pathological changes showed obvious hepatocyte swelling and inflammatory cell infiltration, and the injury degree was more significant at 24 h. Conclusion When the mouse acute liver injury model was prepared by intraperitoneal injection of 0.1% CCl4 solution, the modeling time between 12 h and 24 h was more appropriate.

Key words: Acute liver injury, Carbon tetrachloride, Animal model, Mice