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氯氰菊酯对人乳腺癌细胞MCF-7增殖的影响 被引量:3

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摘要 目的通过观察氯氰菊酯(cypermethrin,CYP)对人乳腺癌细胞株MCF-7细胞增值的影响,探讨氯氰菊酯促进细胞增殖的生物学机制。方法 MCF-7细胞在加受试物前7 d改为无酚红完全培养基,以耗尽细胞内储存的雌激素。实验设为6组:无水乙醇(EtOH)溶剂对照组、雌二醇(E2)雌激素对照组、他莫西芬(TAM)抗雌激素对照组及氯氰菊酯3个浓度梯度(1.0×10-7mol/L、1.0×10-8mol/L、1.0×10-9mol/L)实验组。采用CCK8法检测各组细胞的增值情况,采用Hoechst 33342和Propidium Iodide双染荧光显微镜观察氯氰菊酯对雌激素耗尽诱导细胞凋亡作用影响。结果第4、5天细胞增殖实验,与EtOH溶剂对照组相比,除TAM抗雌激素组与EtOH溶剂对照组细胞增殖活力低外,其他4组细胞增殖活力低,依次为E2雌激素对照组、氯氰菊酯1.0×10-7mol/L组、氯氰菊酯1.0×10-8mol/L组、氯氰菊酯1.0×10-9mol/L组,P均<0.05;第3天与EtOH溶剂对照组比,E2雌激素对照组MCF-7细胞增殖活力高,P<0.05,第2天差异无统计学意义。荧光显微镜下见,EtOH溶剂对照组相比和TAM抗雌激素组细胞的凋亡作用明显,后者强于前者,而E2雌激素对照组、氯氰菊酯1.0×10-7mol/L组、氯氰菊酯1.0×10-8mol/L组、氯氰菊酯1.0×10-9mol/L组对细胞凋亡作用不明显。结论氯氰菊酯有可能是通过抑制乳腺癌细胞凋亡而发挥其促进细胞增殖作用的。
出处 《中国校医》 2012年第10期799-800,F0003,共3页 Chinese Journal of School Doctor
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