苦参碱对U251胶质瘤细胞的增殖抑制和原癌基因表达的影响

目的　探讨苦参碱对胶质瘤细胞株 (U2 5 1细胞株 )的抑制作用及其作用机制。方法　用MTT比色法检测不同浓度苦参碱对U2 5 1细胞的增殖抑制 ,流式细胞仪观察苦参碱对U2 5 1细胞周期的影响 ,RT PCR观察原癌基因C myc表达的变化。结果　苦参碱对U2 5 1细胞增殖抑制作用成剂量依赖性 ,当浓度为 0 10g·L-1时 ,对U2 5 1细胞增殖的抑制率达到 5 3 7%± 6 0 %。流式细胞仪分析显示 ,用 0 10g·L-1苦参碱培养 3d ,细胞周期中G0 /G1期所占比例增高 ,S期占细胞周期的比例减低。RT PCR结果显示 ,随着苦参碱作用剂量的增加 ,C myc基因的表达被明显抑制。结论　苦参碱对人胶质瘤细胞系U2 5 1的增殖具有明显的抑制作用 ,并对原癌基因C myc的表达具有抑制作用

Inhibition of proliferation and influence of Proto-oncogenes expression by matrine in C6 cell

Aim This study was designed to investigate the inhibition of matrine on U251 glioma cell line and its mechanism. Methods MTT was used to measure the levels of the proliferation of U251 cultured with matrine in different concentrations.The effects of matrine on cell cycle of U251 were observed by FCM. The expression of proto oncogenes c myc was measured by RT PCR. Results The proliferation of U251 was obviously inhibited by matrine in a dose dependent manner. The inhibitory rate was (53 7±6 0)%,when cultured with matrine at 0 10 g·L -1 . The outcome of FCM showed that the proportion of G 0/G 1 phase cells were decreased. The proportion of S phase cells were reduced obviously,when cultured with matrine at 0 10 g·L -1 in 3 days.The outcome of RT PCR showed that the expression of proto onco gene C myc was notably decreased, when the dose of matrine was increased. Conclusion Matrine can inhibit the proliferation of U251 and inhibit the expression of proto onco gene C myc.