熊去氧胆酸对大鼠肝再生和细胞周期蛋白D1表达的影响

目的 观察熊去氧胆酸对大鼠肝再生和细胞周期蛋白D1(Cyclin D1)表达的影响.方法 雄性Wistar大鼠分为对照组和熊去氧胆酸组(UDCA组),各32例.对照组给予标准饲料,UDCA组给予0.3%UDCA饲料,7d后行70%肝部分切除术(PH).于术后0、1、2、3 d四个时间点观察大鼠肝细胞增殖和Cyclin D1表达情况.结果 两组大鼠在0d时PCNA蛋白几乎不表达,在PH后1d,PCNA蛋白标记指数迅速上升达高峰,而UDCA组PCNA标记指数显著高于对照组(40.70±4.73比33.24±5.59,P<0.01).2 d时,UDCA组PCNA标记指数仍显著高于对照组(35.64±5.86比29.45±7.04,P<0.05).3 d时两组差异无统计学意义(P>0.05).UDCA组在PH术后1、2 d Cyclin D1表达明显高于对照组(P<0.05),3 d时两组差异无统计学意义(P>0.05).结论 熊去氧胆酸可促进肝细胞增殖,并且上调Cyclin D1表达.

Effects of ursodeoxycholic acid on liver regeneration and Cyclin D1 expression in rats

Objective To investigate the effect of ursodeoxycholic acid(UDCA) on liver regeneration and Cyclin Dl expression in rats. Methods Male Wistar rats were randomly divided into two groups (re=32 in each group: the control group in which the rats were fed on standard diets, and the UDCA group in which rats were given 1% UDCA diets. Seven days later, 70% partial hepatectomy (PH) was performed. On the day 0,1,2 and 3 after PH, the rat liver regeneration and Cyclin Dl expression were examined. Results On the day 0, the PCNA was hardly expressed in all rats. On the day 1 after PH, the PC-NA labeling index reached a peak, and it was significantly higher in the UDCA group than in the control group (40.70±4.73 vs 33. 24 ± 5. 59, P<0. 01). On the day 2, PCNA labeling index in the UDCA group was still significantly higher than in the control group (35.64±5.86 vs 29.45±7.04, P<0.05). On the day 3, there was no significant difference between two groups (P>0.05). On day 1, 2 after PH, the expression of Cyclin Dl in the UDCA group was significantly higher than in the control group (P<0.05) , but there was no significant difference between the two groups on the day 3(P>0.05 ). Conclusion UDCA can promote liver regeneration, and increase the expression of Cyclin D1.