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甲基叔丁基醚对细胞周期及细胞凋亡的影响 |
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周伟 黄关麟 张恒 叶舜华
【摘要】 目的 探讨汽油添加剂甲基叔丁基醚(MTBE)对细胞周期和细胞凋亡的影响。 方法 采用流式细胞仪检测MTBE对NIH/3T3细胞周期(染毒浓度分别为1、2、4 μl/ml,染毒时间为24 h)的影响;应用结晶紫染色法,通过检测Hela细胞的存活情况,了解MTBE对细胞凋亡的影响。结果 流式细胞仪结果显示,MTBE可使NIH/3T3细胞周期发生改变。表现为S期细胞减少,而处于G2+M期的细胞增多,提示MTBE可能具有影响NIH/3T3细胞周期的作用,可诱导细胞增殖。这种作用持续存在于染毒后48 h的细胞中,到染毒后96 h,细胞周期基本恢复正常。结晶紫染色法通过检测Hela细胞的存活情况,发现MTBE可明显拮抗肿瘤坏死因子(TNF)α和放线菌酮所诱导的Hela细胞的凋亡。结论 MTBE可诱导细胞增殖和抑制细胞凋亡,这是其动物致癌性的可能机制之一。 【关键词】 醚类; 细胞周期; 流式细胞术; 脱噬作用
Effects of methyl tertiary butyl ether on cell cycle and cell apoptosis
ZHOU Wei*, HUANG Guanlin, ZHANG Heng (Department of Environmental Health, Shanghai Medical University, Shanghai 200032, China)
【Abstract】 Objective To explore the effects of the new gasoline additive, methyl tertiary butyl ether (MTBE) on cell cycle and cell apoptosis. Methods Flow cytometry was used to evaluate the effect of MTBE (1, 2, 4 μl/ml, 24 h) on NIH/3T3 cell cycles; and the effect of MTBE on Hela cell apoptosis was evaluated by detecting cell survival using crystal violet staining. Results Flow cytometry showed that MTBE could change NIH/3T3 cell cycles, decrease the number of cells in S stage, and arrest cells at G2+M stage. The results suggested that MTBE could affect NIH/3T3 cell cycles and induce cell proliferation. This situation existed 48 hours after the treatment, and cell cycles came back normal 96 hours after the treatment. By detecting cell survival using crystal violet staining, we found that MTBE could inhibit the apoptosis of Hela cells which was induced by tumor necrosis factor (TNF)α and cycloheximide. Conclusion MTBE′s carcinogenicity to animals may relate to induction of cell proliferation and inhibition of cell apoptosis. 【Key words】 Ethers; Cell cycle; Flow cytometry; Apoptosis
甲基叔丁基醚(methyl tertiary butyl ether, MTBE)是一种新型的汽油添加剂,被用来提高汽油燃烧效率,减少一氧化碳(CO)和其他一些有害物质的排放,并可替代铅用作汽油抗爆剂,在世界上已得到广泛应用[1]。目前的研究结果显示,MTBE具有一定的动物致癌性,但其机制[1] [2] 下一页 上一个医学论文: 饮用水源中的微囊藻毒素与大肠癌发病的关系 下一个医学论文: 疾病社会负担测量方法探讨及其意义
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