槐定碱对裸鼠移植性实体瘤SW480生长及p53、VEGF表达作用的研究

Effects of sophoridine on the growth and expressions of p53 and vascular endothelial growth factor of transplanted solid tumor SW480 in nude mice

目的探讨盐酸槐定碱对裸鼠移植性实体瘤SW480的作用及对p53和血管内皮生长因子(VEGF)表达的影响。方法建立裸鼠移植性实体瘤SW480模型,观察在槐定碱作用下移植性实体瘤SW480的体积和质量,用免疫组化法、Western blotting、荧光定量PCR法检测移植性实体瘤组织中p53、VEGF的表达。结果槐定碱组裸鼠移植性实体瘤SW480的体积和质量、p53表达、VEGF表达均显著低于对照组,对移植性实体瘤抑瘤率为34.07%。结论槐定碱对裸鼠移植性实体瘤SW480的生长有明显抑制作用,与抑制p53、VEGF表达相关。

Objective To study the effects of sophoridine on the transplanted solid tumor SW480 and the expression of p53 and vascular endothelial growth factor （VEGF） in the tumor in nude mice. Methods The nude mouse model bearing transplanted solid tumor SW480 was established, and the changes in the volume and weight of the tumor were determined after treatment of the mice with sophoridine. Western blotting and immunohistochemistry were employed to examine the expressions of p53 and VEGF proteins, respectively, and fluorescence quantitative PCR used to detect their mRNA expressions in the tumor tissue. Results The volume and weight of the tumor xenograft in sophoridine group decreased in comparison with those in the control group. Sophoridine treatment resulted in lowered expressions of p53 and VEGF at both the protein and mRNA levels in the tumor explants as compared with the control group, with a tumor inhibition rate of 34.07% in nude mice. Conclusion Sophoridine can inhibit the growth of transplanted solid tumor of human SW480 cell line, the mechanism of which involves the inhibition of p53 and VEGF expression.