丹参酮ⅡA对NCI-H460肺癌细胞的增殖抑制和诱导凋亡作用

目的:本研究拟探讨丹参酮ⅡA对肺癌细胞株NCI-H460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NCI-H460细胞的增殖抑制,应用流式细胞仪观察丹参酮ⅡA对NCI-H460细胞周期的影响,应用RT-PCR法检测用药后bcl-2和C-myc基因mRNA表达水平.结果:丹参酮ⅡA对NCI-H460细胞增殖抑制作用成剂量依赖性.细胞周期分析显示:用0.5 μg/ml丹参酮ⅡA作用NCI-H460细胞24、48、72 h后,凋亡细胞分别占细胞总数1.2%、3.4%、7.7%;用1.0 μg/ml丹参酮ⅡA作用24、48、72 h,凋亡细胞分别占细胞总数2.6%、5.9%、13.4%;用2.0 μg/ml丹参酮ⅡA作用24、48、72 h,凋亡细胞分别占细胞总数4.1%、8.7%、37.6%,说明丹参酮ⅡA能促使NCI-H460细胞发生凋亡,且此作用呈剂量依赖性.用药48 h后bcl-2和C-myc基因mRNA表达明显降低.结论:丹参酮ⅡA对NCI-H460细胞的增殖具有明显的抑制作用及诱导凋亡的作用.

Inhibition of Proliferation and Induction of Apoptosis by Tanshinone ⅡA in NCI-H460 Cell

OBJECTIVE: To investigate the inhibition of tanshinone II A in NCI-H460 cell line and its mechanism. METHODS: MTT was used to measure the levels of the proliferation of NCI-H460 cultured with tanshinone II A in different concentrations. The effects of tanshinone II A on cell cycle of NCI-H460 were observed by FCM. After treated with tanshinone II A for 48h, the level of mRNA of bcl-2 and C-myc in NCI-H460 was tested by RT-PCR method. RESULT:The proliferation of NCI-H460 was obviously inhibited by tanshinone II A in a dose dependent manner. The outcome of FCM showed that the apoptotic cell rate was 1.2%, 3.4%, 7.7% respectively, when cultured with tanshinone II A at 0.5 microg/ml for 24, 48, 72 h. The apoptotic cell rate was 2.6%, 5.9%, 13.4%, when cultured with tanshinone II A at 1.0 microg/ml for 24, 48, 72 h. The apoptotic cell rate was 4.1%, 8.7%, 37.6%, when cultured with tanshinone II A at 2.0 microg/ml for 24, 48, 72 h. The outcome of RT-PCR showed that the expression of proto-onco gene bcl-2 and C-myc was notably decrease, after cultured with tanshinone II A for 48 h. CONCLUSION: Tanshinone IIA can inhibit the proliferation of NCI-H460 and induce the apoptosis of the cell.