方法:预先给小鼠(20～25克、雄性)分别腹腔注射苯巴此妥(PB,50毫克/公斤/日×4日)或3-甲基胆蒽(3-MC)花生油悬液(40毫克/公斤/日×2日),对照组分别注射等容量生理盐水或花生油。最后一次预处理12小时后,将以上四组小鼠各分出一半并皮下注射齐墩果酸吐温80混悬液(160毫克/公升/日×2日);另一半注射等容量吐温80溶液。最后一次注射后开始禁 METHODS: Mice (20-25 g, male) were given an intraperitoneal injection of phenobarbital (PB, 50 mg / kg / day x 4) or 3-methylcholanthrene 40 mg / kg / day × 2 days), control group were injected with equal volume of saline or peanut oil. Twelve hours after the last pretreatment, the mice in the above four groups were divided into two groups and injected subcutaneously with oleanolic acid Tween 80 suspension (160 mg / L / day x 2 days); the other half was injected with an equal volume of Tween 80 solution. After the last injection began to ban