目的探讨柴胡皂甙d(saikosaponins-d,SSd)在实验性大鼠肝癌中对信号传导蛋白和转录激活因子3(signal transducerand activator of transcription 3,STAT3)表达的影响及其意义。方法 100只清洁级雄性SD大鼠随机分为3组:模型组、DMSO对照组和SSd干预组。模型组20只,余两组各40只。各组均以二乙基亚硝胺(Diethyl nitrosamine,DEN)诱癌,SSd干预组在诱癌同时行SSd干预,DMSO对照组在造模的基础上加入同SSd干预组等剂量的DMSO。14周停药,18周末处死所有实验大鼠。取肝脏标本,HE染色观察组织病理学改变,免疫组化方法检测STAT3、p-STAT3和环氧化酶-2(cyclooxygenase-2,COX-2)的表达。结果 组织病理学检查发现SSd干预可以减轻肝脏损害;免疫组化检测结果显示SSd能够下调大鼠肝癌组织中STAT3和COX-2表达,与DMSO对照组相比差异具有统计学意义(P<0.05)。结论 SSd可下调肝癌组织中STAT3和COX-2的表达,这可能是其抑制DEN诱发大鼠肝癌形成的机制之一。
【英文摘要】
Objective To explore the effects of saikosaponins-d(SSd) on STAT3(signal transducer and activator of transcription 3) in experimental hepatocarcinoma of rats.Methods One hundred SD male rats were randomly divided into 3 groups: model group(n=20),DMSO control group(n=40),SSd intervention group(n=40).The rats in three groups were treated with DEN,and in the meantime,rats in the intervention group were given intraperitoneal SSd for 14 weeks.rats in DMSO control group were given the same dose of DMSO with SSd i...