吉林大学学报(医学版)

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电离辐射对转染pcDNA3.1-Egr-1-AIF△1-480质粒的MCF-7细胞增殖和侵袭能力的影响

齐亚莉1,2,刘洪彬3,谢忠伟3,刘彦军4,王剑锋2,5   

  1. (1. 北华大学公共卫生学院流行病学教研室,吉林 吉林 132011;2. 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;3. 吉林省吉林(市)出入境检验检疫局,吉林 吉林 132013;4. 吉林省长春市人民医院放疗科,吉林 长春 130051;5. 吉林大学中日联谊医院放疗科,吉林 长春 130033)
  • 收稿日期:2013-11-30 出版日期:2014-09-28 发布日期:2014-09-28
  • 通讯作者: 王剑锋 E-mail:(Tel:0431-85619443,E-mail: jfwang@jlu.edu.cn)
  • 作者简介:齐亚莉(1973-),女,吉林省四平市人,副教授,医学博士,主要从事艾滋病和肿瘤放射治疗的流行病学研究。
  • 基金资助:

    国家自然科学基金资助课题(30970681);吉林省教育厅“十二五”科学技术研究项目资助课题(2014-192)

Effects of ionizing radiation on proliferation and invasion of MCF-7 cells transfected with pcDNA3.1-Egr-1-AIF△1-480 plasmid

QI Ya-li 1,2, LIU Hong-bin3, XIE Zhong-wei3, LIU Yan-jun4, WANG Jian-feng 2,5   

  1. (1. Department of Epidemiology,School of Public Health,Beihua University,Jilin 132001,China;  2.Key Laboratory of Radiobiology,Ministry of Health,School of Public Health,Jilin University,Changchun 130021,China;3. Jilin Province Jilin(City) Entry and Exit Inspection and Quarantine Bureau,Jilin 132013,China;4. Department of Radiotherapy,People’s Hospital,Changchun City,Changchun 130051,China;  5. Department of Radiotherapy,China-Japan Union Hospital,Jilin University,Changchun 130033,China)
  • Received:2013-11-30 Online:2014-09-28 Published:2014-09-28

摘要:

目的:探讨辐射增强靶向截短型凋亡诱导因子(AIFΔ1-480)对MCF-7细胞增殖和侵袭能力的影响,阐明其提高肿瘤基因-放射治疗的可能性。方法:人乳腺癌MCF-7细胞经质粒转染早期生长反应1(Egr-1)介导的AIFΔ1-480重组表达载体pcDNA3.1-Egr-1-AIFΔ1-480(pE-AIFΔ1-480),2 Gy X射线照射后24 h,分别采用MTT法和Transwell侵袭实验检测细胞增殖和侵袭能力。实验分为正常对照组、pcDNA3.1组(只转染pcDNA3.1质粒)、pE-AIFΔ1-480组(转染pE-AIFΔ1-480质粒)、2 Gy X线照射组和pE-AIFΔ1-480+ 2 Gy X线照射组。结果:质粒转染并经2 Gy X线照射后,正常对照组、pcDNA3.1组和pE-AIFΔ1-480质粒组细胞生长较快,且增殖规律基本一致。与正常对照组比较,2 Gy X线照射组和pE-AIFΔ1-480 + 2 Gy X线照射组细胞增殖能力显著降低(P<0.05),且以pE-AIFΔ1-480+ 2 Gy X线照射组降低更明显,从12 h开始较2 Gy X线照射组明显降低(P<0.05)。正常对照组、pcDNA3.1组和pE-AIFΔ1-480组穿过基底膜细胞数基本一致,而2 Gy X线照射组和pE-AIFΔ1-480+ 2 Gy 照射组穿过基底膜细胞较正常对照组明显减少(P<0.05或P<0.01),并且pE-AIFΔ1-480+2 Gy照射组穿过基底膜的细胞数较2 Gy照射组减少更明显(P<0. 01)。结论:AIFΔ1-480和电离辐射均能抑制人乳腺癌MCF-7细胞增殖和侵袭,二者具有协同作用,并且Egr-1启动子能增强辐射条件下的抑制效果。

关键词: 早期生长反应1, 截短型凋亡诱导因子;细胞增殖;侵袭;电离辐射

Abstract:

Abstract:Objective
To investigate the influence of  truncated apoptosis inducing factor (AIFΔ1-480) on the proliferation and invasion of MCF-7 cells, and to clarify the possibility of promoting cancer gene-radiotherapy. Methods The human breast cancer MCF-7 cells were transfected with  AIFΔ1-480 recombinant expression vector pcDNA3.1-Egr-1- AIFΔ1-480 (pE-AIFΔ1-480) mediated by Egr-1;24 h after 2 Gy X-ray irradiation,MTT assay and Transwell invasion assay were performed to measure the changes of cell proliferation and invasion.The MCF-7 cells were diveded into normal control,pcDNA3.1,pE-AIFΔ1-480,2 Gy irradiation and pE-AIFΔ1-480 + 2 Gy irradiation groups.Results After transfection and 2 Gy X-ray  irradiation,the cells proliferated very fast in normal control,pcDNA3.1 and pE-AIFΔ1-480 groups,and the proliferation regularity was similar.Compared with normal control group,the cell proliferation abilities were  significantly decreased in 2 Gy irradiation and pE-AIFΔ1-480 + 2 Gy irradiation groups (P<0.05),and it was more obvious in pE-AIFΔ1-480 + 2 Gy irradiation group,and it was significant lower than that in 2 Gy irradiation group (P<0.05).The number of the cells permeating membrane was basically same in normal control,pcDNA3.1 and pE-AIFΔ1-480 groups; compared with normal control group,they were significantly decreased in 2 Gy irradiation and pE-AIFΔ1-480+ 2 Gy irradiation groups(P<0.05 or P<0.01);and it was more significant in pE-AIFΔ1-480 + 2 Gy irradiation group than that in 2 Gy irradiation group (P<0.01).Conclusion AIFΔ1-480 and ionizing radiation could inhibit the proliferation and invasion of human breast cancer MCF-7 cells,both of them have a synergistic effect,and Egr-1 promoter can enhance the suppression effect under radiation conditions.

Key words: Egr-1, truncated apoptosis inducing factor, cell proliferation, invasion, ionizing radiation

中图分类号: 

  • R737.9