丹参酮ⅡA对C6胶质瘤细胞的增殖抑制和诱导凋亡作用

目的：探讨丹参酮ⅡA对大鼠胶质瘤细胞株C6的增殖抑制作用及其作用机理。 方法： 应用MTT比色法检测不同浓度丹参酮ⅡA对C6细胞的增殖抑制，应用流式细胞仪观察丹参酮ⅡA对C6细胞周期的影响，应用琼脂糖凝胶电泳观察C6细胞DNA的变化，应用RT-PCR观察相关基因c-myc表达的变化。 结果： 丹参酮ⅡA对C6细胞增殖抑制作用呈剂量依赖性。细胞周期分析显示：用1.0 mg/L丹参酮ⅡA作用C6细胞，在作用72 h出现凋亡峰，凋亡细胞占细胞总数7.7%；用2.0 mg/L丹参酮ⅡA作用C6细胞，在作用72 h出现凋亡峰，凋亡细胞占细胞总数21.6%。琼脂糖凝胶电泳结果显示：一定剂量丹参酮ⅡA作用后，C6细胞具有明显的凋亡特征，细胞核DNA呈梯状降解。RT-PCR结果显示：随着丹参酮ⅡA作用剂量的增加，c-myc基因的表达被明显抑制。 结论： 丹参酮ⅡA对大鼠胶质瘤细胞系C6的增殖具有明显的抑制作用及诱导凋亡的作用，并对原癌基因c-myc的表达具有抑制作用。

Inhibition of proliferation and induction of apoptosis by tanshinone ⅡA in C6 cells

AIM: This study was designed to investigate the inhibition of tanshinone ⅡA on C6 glioma cell line and its mechanism. METHODS: MTT was used to measure the levels of the proliferation of C6 cultured with tanshinone ⅡA at different concentrations. The effects of tanshinone ⅡA on cell cycle of C6 were observed by FCM. The change of DNA was observed by Sepharose electrophoresis. The expression of proto-oncogenes c-myc was measured by RT-PCR. RESULTS: The proliferation of C6 was obviously inhibited by tanshinone ⅡA in a dose-dependent manner. The outcome of FCM showed that the apoptotic cell rate was 7.7%, when cultured with tanshinone ⅡA at 1.0 mg/L for 3 days. The apoptotic cell rate was 21.6%, when cultured with tanshinone ⅡA at 2.0 mg/L in 3 days. CONCLUSION: Tanshinone ⅡA inhibits the proliferation of C6 cells, induces apoptosis and inhibits the expression of proto-oncogene c-myc.