砷雌激素样效应及对HeLa细胞生长的影响

目的 观察砷雌激素样效应及对HeLa细胞体外生长的影响作用.方法 实验分为8组,RPMI1640培养液分别含雌二醇(E2,1 nmol/L)、三氧化二砷(A82O3,0.5、1.0、5.0 μmol/L)、雌二醇拮抗剂(ICI,500nmol/L)、E2(1 nmoL/L)+ICI(500 nmol/L)、As2O3(1.0μmol/L)+CI(500 nmol/L)以及对照组,以含有不同处理因素的RPMI 1640培养液培养HeLa细胞24、48、72 h.光镜下观察72 h时HeLa细胞生长状况,四甲基偶氮唑盐(MTT)法检测各时间点HeLa细胞存活率,流式细胞计量术检测48 h时HeLa细胞周期.结果 形态学观察E2组和0.5μmol/L As2O3组细胞数量明显多于对照组,长势旺盛.24、48、72 h E2组和0.5μmoL/L As2O3组对HeLa细胞的增殖促进率分别为6.35%、11.56%、38.33%及6.35%、8.50%、20.26%.两组作用效果相似,对细胞生长起到增殖促进作用.与对照组(41.68±1.05)%]比较,E2组(55.72±2.31)%]和0.5μmol/L As2O3组(47.82±1.41)%]S期细胞有增多趋势,其他各组则减少,其中5.0 μmol/L As2O3组(21.1l±4.99)%]、ICI组(20.16±4.76)%]明显减少,组间比较差异有统计学意义(P＜0.05).结论 小剂量As2O3具有雌激素样效应,可促进HeLa细胞的生长.

Observation on estrogen-like effects of arsenite and effects of growth on HeLa cell proliferation

Objective To determine whether arsenic has estrogen-like effects,the cell proliferation was measured iil human eervical cancer line(HeLa)in vitro.Methods The HeLa cells were grown in improved RPMI 1640 supplemented respectively with β-estradiol(E2,1 nmol/L),Arsenic trioxide(As2O3,0.5,1.0,5.0 μmol/L),ICI (500 nmol/L),E2(1 nmol/L)+ICI(500 nmol/L),As2O3(1.0 μmol/L)+ICI(500 nmol/L)and control.The growth morphology of HeLa cell was observed under microscope after 72 h.The method of M1Tr was used to study the cell proliferation after 24.48 and 72 h.The technique of flow eytometry was used to measure cell cycle after 48 h. Results HeLa cells in E2 and 0.5 μmoL/L As2O3 treatment were more better growth in morphology than control group.Percentage of HeLa cells proliferation at 24,48,72 h in E2 and 0.5 μmol/L As2O3 treatment were 6.35%, 11.56%,38.33%and 6.35%,8.50%,20.26%respectively.The proliferation effect of HeLa cells was similar in two treatments.The proliferation of HeLa cells were inhibited in other treatments.Compared with control(41.68± 1.05)%],HeLa cells were promoted go to S phases in E2(55.72±2.31)%]and 0.5 μmol/L As2O3(47.82± 1.41)%]treatment.But in other treatments HeLa cells were hold back to S phases.Compared with control,there was a significant differenee(P＜0.05)of cell percentage in S phases in 5.0 μmol/L As2O3(21.11±4.99)%]and ICI(20.16±4.76)%]treatments.Conclusion Small amounts of As2O3 impose estrogen.1ike effects and stimulate the proliferation of HeLa cells.