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• 基础研究 •    下一篇

体外稳定转染的重组质粒pEgr-hp53联合辐射对人卵巢癌SKOV-3 细胞周期进程及增殖的影响

董丽华1,2,刘 锋3,李艳博1,龚守良1   

  1. 1.吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春 130021;2.吉林大学第一医院肿瘤治疗中心放疗科,吉林 长春 130021;3.吉林大学中日联谊医院肾病风湿病科,吉林 长春 130033
  • 收稿日期:2007-07-03 修回日期:1900-01-01 出版日期:2008-05-28 发布日期:2008-05-28
  • 通讯作者: 龚守良

Effects of recombinant plasmid pEgr-p53 transfected stably in combination with X-irradiation on cell cycle progression and proliferation in human SKOV-3 tumor cells in vitro

DONG Li-hua1,2, LIU Feng3, LI Yan-bo1, FU Shi-b   

  1. 1.Key Laboratory of Radiobiology, Ministry of Health, School of Public Health, Jilin University, Changchun 130021, China; 2.Department of Radiotherapy, First Hospital, Jilin University,Changchun 130021,China;3.Department of Nephrology and Rheumatology, China-Japan Union Hospital, Jilin University, Changchun 130033, China
  • Received:2007-07-03 Revised:1900-01-01 Online:2008-05-28 Published:2008-05-28
  • Contact: GONG Shou-liang

摘要: 目的:探讨体外稳定转染的pEgr-hp53重组质粒联合辐射对人卵巢癌SKOV-3 细胞周期及增殖的影响,阐明其抑制肿瘤细胞增殖的机制。方法:脂质体包裹重组质粒pEgr-hp53和pcDNA3.1 体外转染SKOV-3 细胞所表达的SKOV-3-hp53和SKOV-3-vect分别接受0、0.5、2.0和5.0 Gy X射线照射,即8个实验组,通过绘制生长曲线评价肿瘤细胞增殖速度,流式细胞术检测肿瘤细胞周期进程的变化。结果:与0 Gy组比较,体外稳定转染的SKOV-3-hp53经不同剂量X射线(0.5、2.0和5.0 Gy)照射后2 d细胞数均明显降低(P<0.05 或 P<0.01),并随照射剂量的加大和照后时间的延长下降更为明显;与0 Gy组比较,G0/G 1期细胞百分数均明显增高(P<0.001),G2/M期不同程度降低。SKOV-3-hp53照射组细胞数均明显低于其相应的SKOV-3-vect照射组,0.5 Gy照后4~8 d、2.0 Gy照后2 d和5.0 Gy照后6 d细胞数均明显降低(P<0.05 或 P<0.01);G0/G1期细胞百分数明显增高(P<0.01),G2/M期明显下降(P<0.01)。结论:体外稳定转染的pEgr-hp53联合辐射可使人卵巢癌SKOV-3细胞 周期阻滞于G1期,并抑制肿瘤细胞增殖。电离辐射激活Egr-1启动子,使p53基因表达增强,加强了对肿瘤细胞生长的抑制作用。

关键词: 人卵巢癌SKOV-3细胞, 细胞周期, 细胞增殖

Abstract: Abstract:Objective To investigate the effect of recombinant plasmid pEgr-hp53 transfected stably in combination with X-ray irradiation on the cell cycle progression and the proliferation in human SKOV-3 tumor cells.Methods pEgr-hp53 and pcDNA3.1 packaged with liposome were stably transfected into SKOV-3 cells in vitro.SKOV-3-hp53 and SKOV-3-vect were irradiated with 0,0.5, 2.0 and 5.0 Gy X-rays, respectively, i.e.8 experimental groups.The SKOV-3 cell proliferation and the cell cycle progression were measured with flow cytometry and cell growth curve, respectively.Results Compared with 0 Gy group, the cell counts in SKOV-3-hp53 plus different doses of irradiation groups 2 d after irradiation decreased significantly (P<0.05 or P<0.01), and the decrease of the cell counts was more significant with the increasing of dose and the prolongation of time after irradiation; the percentage of G0/G1 cells increased significantly (P<0.001), while that of G2/M cells decreased in varying degrees.The cell counts in SKOV-3-hp53 plus irradiation group were significantly lower than those in corresponding SKOV-3-vect plus irradiation group, the cell counts 4-8 d after irradiation with 0.5 Gy, 2 d after 2.0 Gy irradiation and 6 d after 5.0 Gy irradiation decreased significantly (P<0.05 or P<0.01); the percentage of G0/G1 cells increased significantly (P<0.01), while that of G2/M cells decreased significantly (P<0.01).Conclusion pEgr-hp53  transfected stably in combination with X-ray irradiation leads to p53-induced G1 arrest in SKOV-3 cells and inhibits the cell proliferation.Ionizing radiation can activate early growth response-1 (Egr-1) gene promoter and increase the expression of p53 gene, and enhance the inhibition of tumor cell growth.

Key words: human ovarian cancer SKOV-3 cell, cell cycle, cell proliferation

中图分类号: 

  • Q78