二氢青蒿素抑制大鼠胶质瘤C6细胞增殖和诱导凋亡

目的:研究二氢青蒿素(dihydroartemisinin,DHA)对大鼠胶质瘤细胞(C6细胞)增殖和凋亡的影响。方法:在培养的C6细胞,加入DHA1～125μmol/L作用24、48、72h。以台盼蓝染色计数和噻唑蓝(MTT)还原反应,观察细胞增殖和活性;以Hoechst33342染色,观察细胞凋亡;以H2DCFDA氧化试验检测细胞内活性氧自由基(reactive oxygen species,ROS)变化。结果:DHA5～125μmol/L浓度及时间依赖性抑制C6细胞的增殖,作用48h后的IC50是23.4μmol/L;5～25μmol/L能诱导细胞凋亡(P<0.05);5～125μmol/L DHA可增高细胞内的ROS(P<0.01)。结论:DHA能够抑制C6细胞增殖,并诱导其凋亡,其细胞毒作用与细胞内ROS增加相关。

Dihydroartemisinin inhibits proliferation and induces apoptosis of rat glioma C6 cells

OBJECTIVE: To determine the effects of dihydroartemisinin (DHA) on the proliferation and apoptosis of rat glioma C6 cells. METHODS: DHA (1~ 125 micromol/L) was added into the cultured C6 cells and incubated for 24, 48 and 72 h. The cell proliferation and viability were determined by trypan blue exclusion assay and 3-(4, 5-dimethylthiazol-2yl)-2, 5 diphenyl tetrazolium bromide (MTT) reduction assay. The apoptosis was detected by Hoechst 33342 staining. The intracellular reactive oxygen species (ROS) was measured by H(2)DCFDA oxidative reaction. RESULTS: DHA 5 ~ 125 micromol/L inhibited the proliferation of C6 cells in concentration- and time-dependent manners, the IC50 at 48 h was 23.4 micromol/L. DHA 5 ~ 25 micromol/L induced C6 cell apoptosis (P<0.05), and 5 ~ 125 micromol/L increased the intracellular ROS (P<0.01). CONCLUSION: DHA inhibits the proliferation and induces the apoptosis of C6 cells; its cytotoxic effect may result from the increase of intercellular ROS.