塔斯品碱对小鼠S180肉瘤的抑制作用及其机制探讨

目的：研究塔斯品碱对小鼠S180肉瘤生长的抑制作用及其机制。方法：建立小鼠S180肉瘤动物模型,利用该模型观察塔斯品碱的体内抗肿瘤作用。通过免疫组织化学Elivision plus法检测肿瘤组织内微血管密度(MVD)及血管内皮细胞生长因子(VEGF),碱性成纤维细胞生长因子(bFGF),凋亡基因Bcl-2,Bax蛋白表达情况。结果：塔斯品碱对小鼠S180肉瘤具有抑制作用,瘤体血管内的VEGF,bFGF,Bcl-2,Bax蛋白表达逐渐下降,Bax/Bcl-2比值逐渐上升,存在良好的量效关系。结论：塔斯品碱能够抑制小鼠S180肉瘤的生长,其机制可能与降低瘤体组织内VEGF,bFGF,Bcl-2和Bax的蛋白表达,促进血管内皮细胞凋亡有关。

Inhibitory effect of taspine on mouse S180 sarcoma and its mechanism

Objective: To study the inhibition effect of taspine on mouse S180 sarcoma and its mechanism. Method: The mouse S180 sarcoma model was established and used to observe the antitumor activity of taspine. The microvessel density and protein expressing of the VEGF, bFGF, Bcl-2 and Bax in the tumor were measured by immunohistochemistry. Result: Taspine showed antitumor activity on the mouse S180 sarcoma in a good dose-dependent manner. The inhibition rates on tumor of taspine at low, middle and high concentrations were 39.08%, 43.99% and 48.60%, respectively. The microvessel density and protein expressing of the VEGF, bFGF, Bcl-2 and Bax in the tumor were decreased compared with the negative control. The ratio of Bax to Bcl-2 was increased. Conclusion: Taspine has antitumor effect on the S180 sarcoma, and the mechanism may be through the way of decreasing the expressing of the VEGF, bFGF, Bcl-2 and Bax and inducing the vascular endothelial cell apoptosis.