川楝素对H22肝癌荷瘤小鼠的抑瘤作用

目的:建立荷瘤小鼠模型,探讨川楝素对肝癌的抑瘤作用及其机制.方法:建立H22肝癌移植瘤小鼠模型,随机分为0.9%氯化钠溶液对照组、环磷酰胺(cyclophosphamide,CTX)组(20 mg/kg)、川楝素低剂量组(0.173 mg/kg)和川楝素高剂量组(0.690 mg/kg)共4组.各组药物处理后,测量小鼠体内肿瘤大小,观察肿瘤的生长曲线;剥瘤后称重,计算小鼠的肿瘤抑制率;行肿瘤组织病理形态学及HE染色观察,透射电子显微镜观察其超微结构改变;同时,观察川楝素对荷瘤小鼠心、肝、脾、肾、胸腺及睾丸组织的影响;免疫组织化学法检测肿瘤组织内Bcl-2、Bax和Fas蛋白的表达.结果:川楝素可显著抑制小鼠体内肿瘤的生长,川楝素低剂量组(0.173 mg/kg)和高剂量组(0.690 mg/kg)的抑瘤率分别为66.23%和87.01%(P＜0.05);透射电子显微镜观察可见肿瘤组织超微结构中出现凋亡小体;HE染色显示小鼠心、肝、脾、肾及睾丸脏器形态正常,而胸腺组织中可见胸腺小叶的数量及面积减少甚至消失;免疫组织化学检测证实,小鼠肿瘤组织内Bcl-2蛋白表达下调,Bax和Fas蛋白表达上调(P＜0.05).结论:川楝素能够明显抑制小鼠移植瘤的生长,此作用可能与抑制肿瘤细胞增殖及促进肿瘤细胞凋亡有关.

Anticancer effects of the Chinese medicine toosendanin on the mice bearing H22 hepatocellular carcinoma

Objective:To establish a mouse model bearing H22 hepatocellular carcinoma,and to explore the effects of the Chinese medicine toosendanin(TSN)on the solid carcinoma as well as its probable mechanisms.Methods:The BALB/c mice bearing H22 hepatocellular carcinoma were established and randomly divided into four groups:normal saline(NS)control group,low-dose(0.173 mg/kg)toosendanin(TSN)group,and high-dose(0.690 mg/kg)TSN group.The size of transplanted tumor was measured during treatment to draw the tumor growth v...