甲基叔丁基醚对细胞周期及细胞凋亡的影响

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、４μｌ／ｍｌ,染毒时间为２４ｈ）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ＭＴＢ

Effects of methyl tertiary butyl ether on cell cycle and cell apoptosis

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 microl/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 G(2) + 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)alpha and cycloheximide. CONCLUSION: MTBE's carcinogenicity to animals may relate to induction of cell proliferation and inhibition of cell apoptosis.