Methods: Acute and chronic hepatic injury were induced by thioacetamide and CCl4 respective.Then the level of serum nitric oxide(NO) was detected.

• 方法：硫代乙酰胺复制急性肝损伤模型，40%25的四氯化碳溶液复制慢性肝损伤模型，硝酸还原酶比色法检测一氧化氮（NO）含量以及取肝组织做病理组织学检查。