癌变·畸变·突变 ›› 2004, Vol. 16 ›› Issue (3): 129-131.doi: 10.3969/j.issn.1004-616x.2004.03.001

• 论著 •    下一篇

重组质粒pEgr-P16在Ec9706细胞中的辐射诱导凋亡作用

吴丛梅;黄天华;谢庆东;李德锐;陈秀如;吴德生;徐小虎   

  1. 汕头大学医学院生殖医学研究中心,广东 汕头 515041
  • 收稿日期:2004-02-10 修回日期:2004-03-16 出版日期:2004-05-30 发布日期:2004-05-30
  • 通讯作者: 黄天华

The Apoptosis Effect of pEgr-P16 Recombined Plasmid in EC9706 cell Induced by Ionizing Irradiation

WU Cong-mei,HUANG Tian-Hua;XIE Qing-Dong,et al   

  1. Research center of Reproductive Medicine,Shantou University Medical college,Shantou 515041,china
  • Received:2004-02-10 Revised:2004-03-16 Online:2004-05-30 Published:2004-05-30
  • Contact: HUANG Tian-Hua

摘要: 背景与目的:研究pEgr-P16重组质粒在食管癌细胞系Ec9706中的辐射诱导凋亡作用。材料与方法:pEgr-P16重组质粒通过脂质体介导转染人食管癌Ec9706细胞,定量RT-PcR检测2 Gy γ射线照射后被转染细胞中P16的表达和细胞凋亡率的变化。结果:对照组无P16蛋白表达,转染质粒组细胞接受2 Gy γ射线照射后2~24 h P16表达量与时间呈曲线关系,在22 h时P16的mRNA水平最高;P16基因联合放射可诱导食管癌细胞凋亡,凋亡率高于单纯照射组和单纯基因诱导组。结论:γ射线可诱导pEgr-P16重组质粒在人Ec9706细胞中表达并显著提高Ec9706细胞的凋亡率。本研究结果为食管癌基因-放射治疗的进一步研究奠定了实验基础。

关键词: Egr-1启动子, γ射线, P16表达, 凋亡

Abstract: BACKGROUND & AIM: To investigate the effect on apoptosis of the recombined plasmid pEgr-P16 induced by ionizing irradiation in esophageal squarous carcinoma EC9706 cell line. MATERIAL AND METHODS: The recombined plasmid pEgr-P16 was transfected into EC9706 cell with lipofectamine. Quantitative RT-PCR was performed to study the expression of P16 in EC9706 and the apoptosis of Ec9706 cells after transfection induced by ionizing irradiation. RESULTS:The'was cwve valefionshp between and time during 2~24 h after irradiation and thereafter decreased gradually, in contrast to negative P16 expression in the control. The induction of apoptosis in P16 gene therapy plus irradiation group was higher than that in either plasmid or irradiation group alone. CONCLUSION:γ-ray can induce expression of pEgr-P16 plasmid in Ec9706 cells and enhance the apoptosis of cancer cells.These results may establish important experimental basis for gene-radiotherapy of esophageal carcinoma.

Key words: Egr-1 promoter, γ-ray, P16 expression, apoptosis