阻断氯通道对人喉癌Hep-2细胞增殖及凋亡的影响

目的研究氯通道阻断剂5-硝基-2-(3-苯丙氨基)苯甲酸5-nitro-2-(3-phenylpropylamino)- benzoic acid,NPPB]对人喉表皮样癌细胞(Hep-2)细胞增殖及凋亡的影响,探讨氯通道在喉癌中的意义。方法以Hep-2细胞为研究对象,采用四甲基偶氮唑蓝(MTT)比色法检测不同浓度NPPB对Hep-2细胞增殖的影响;用流式细胞术检测NPPB阻断氯通道前后Hep-2细胞凋亡率及细胞周期变化。结果NPPB浓度依赖性地抑制Hep-2细胞增殖,NPPB阻断氯通道前后Hep-2细胞凋亡率及细胞周期存在显著性差异。结论氯通道与Hep-2细胞增殖及凋亡密切相关,阻断氯通道可抑制Hep-2细胞增殖、诱导Hep-2细胞凋亡。

Effect of blocking chloride channel on the proliferation and apoptosis of Hep-2 cell line

OBJECTIVE To study the effect of blocking chloride channel on the proliferation and apoptosis of Hep-2 cell line.METHODS Hep-2 cell line was used as a target,The effect of chloride channel blocker(NPPB)on the proliferation of Hep-2 cell line was evaluated by MTT assay.Flow cytometry was performed to measure the apoptosis index of selected Hep-2 cell clones.RESULTS Inhibition of the proliferation of Hep-2 cells depended on the dose of chloride channel blocker(NPPB).The apoptosis index of Hep-2 cells was remarkably different before and after its chloride channel was blocked. CONCLUSION Normal expression and function of chloride channel is essential for the maintenance of proper cell growth.Our results suggest that blocking the chloride channel could inhibit the proliferation and induce apoptosis of Hep-2 cell line.