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17β-雌二醇对垂体腺瘤细胞增殖和电压依赖性钾电流的影响

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摘要 目的 研究 17β 雌二醇 (E2 )对垂体腺瘤GH3细胞增殖和电压依赖性K+ 电流 (IK(V) )的影响 ,探讨IK(V) 与细胞增殖的关系。方法 不同浓度E2作用GH3细胞 ,应用MTT比色法测定细胞增殖 ,流式细胞仪检测细胞周期分布 ,运用全细胞膜片钳技术记录和分析E2对GH3细胞中IK(V) 的作用。结果 E2作用GH3细胞 3d后 ,0 1nmol/L、1nmol/L和 10nmol/LE2组均明显诱导细胞增殖(P <0 0 1) ,并使细胞增殖周期中G0 /G1 期细胞比例下降 ,进入S期细胞增加。E2作用GH3细胞 2 4h后 ,E2以浓度效应关系增加IK(V) 。结论 电压依赖性K+ 通道可能参与E2对GH3细胞的促增殖作用。提示可应用K+ 通道阻断性药物治疗垂体腺瘤。
出处 《中国神经精神疾病杂志》 CAS CSCD 北大核心 2005年第1期63-65,共3页 Chinese Journal of Nervous and Mental Diseases
基金 国家自然科学基金资助项目 (编号 :3 0 3 70 5 16) 黑龙江省卫生厅基金资助项目 (编号 :2 0 0 4 0 90 编号 :2 0 0 4 179)
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参考文献9

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