吉林大学学报(医学版) ›› 2016, Vol. 42 ›› Issue (03): 419-423.doi: 10.13481/j.1671-587x.20160301

• 基础研究 •    下一篇

pEgr1-TRAIL重组质粒联合电离辐射对乳腺癌MCF-7细胞死亡受体通路相关基因和蛋白表达的影响

胡志宏1, 赵大力2, 谢忠伟2, 王梦莹1, 胡景坤1, 龚守良3, 刘扬3, 齐亚莉1   

  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. 吉林省吉林(市)出入境检验检疫局, 吉林 吉林 132012;
    3. 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
  • 收稿日期:2016-01-23 出版日期:2016-05-28 发布日期:2016-06-17
  • 通讯作者: 齐亚莉,副教授,硕士研究生导师(Tel:0432-64608343,E-mail:374494617@qq.com) E-mail:374494617@qq.com
  • 作者简介:胡志宏(1966-),女,吉林省吉林市人,副教授,医学硕士,主要从事肿瘤基因放射治疗方面的研究。
  • 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 pEgr1-TRAIL recombinant plasmid combined with ionizing radiation on related gene and protein expressions of death receptor pathway in breast cancer MCF-7 cells

HU Zhihong1, ZHAO Dali2, XIE Zhongwei2, WANG Mengying1, HU Jingkun1, GONG Shouliang3, LIU Yang3, QI Yali1   

  1. 1. Department of Epidemiology, School of Public Health, Beihua University, Jilin 132001, China;
    2. Jilin Province (City) Entry and Exit Inspection and Quarantine Bureau, Jilin Province, Jilin 132012, China;
    3. Key Laboratory of Radiobiology, Ministry of Health, School of Public Health, Jilin University, Changchun 130021, China
  • Received:2016-01-23 Online:2016-05-28 Published:2016-06-17

摘要:

目的: 将Egr1-TRAIL重组质粒转染人乳腺癌MCF-7细胞且加X线照射,探讨MCF-7细胞中死亡受体通路相关基因和蛋白表达的变化。方法: 将MCF-7细胞分为对照组、空质粒组、pEgr1-TRAIL质粒组、4.0GyX射线组、空质粒+4.0GyX射线组和pEgr1-TRAIL+4.0GyX射线组。Real-timePCR法检测各组MCF-7细胞中DR4、caspase-9和caspase-6mRNA表达水平;Western blotting法检测各组MCF-7细胞中DR4、caspase-9和caspase-6蛋白相对表达水平。结果: 经4.0GyX射线照射后4h,与对照组比较,各组MCF-7细胞中DR4、caspase-9和caspase-6mRNA表达水平升高(P<0.01),8h达最高值,之后开始降低,到24h恢复到照射前水平;各组MCF-7细胞中DR4、caspase-9和caspase-6mRNA表达由高到低的顺序为pEgr1-TRAIL+4.0GyX射线组> 空质粒+4.0GyX射线组> pEgr1-TRAIL质粒组> 空质粒组> 4.0GyX射线组> 对照组,其中pEgr1-TRAIL+4.0GyX射线组MCF-7细胞中DR4、caspase-9和caspase-6mRNA表达水平明显高于其他各组(P<0.01)。MCF-7细胞中DR4、caspase-9和caspase-6蛋白在照射后6h开始表达,12h达高峰,48h后细胞中DR4、caspase-9和caspase-6蛋白表达水平仍高于6h时蛋白表达水平。与对照组比较,其他各组MCF-7细胞中蛋白相对表达水平由高到低的顺序为pEgr1-TRAIL+4.0GyX射线组> 空质粒+4.0GyX射线组> 4.0GyX射线组> pEgr1-TRAIL质粒组> 空质粒组> 对照组,其中pEgr1-TRAIL+4.0GyX射线组MCF-7细胞中蛋白相对表达水平明显高于其他各组。结论: pEgr1-TRAIL重组质粒联合放疗对MCF-7细胞具有杀伤和诱导凋亡的作用,其效果优于单纯质粒或单纯照射。

关键词: pEgr1-TRAIL重组质粒, 电离辐射, MCF-7细胞, 死亡受体通路

Abstract:

Objective: To transfer the pEgr1-TRAIL recombinant plasmid into human breast cancer MCF-7 cells and to combine with ionizing radiation,and to discuss the changes of related gene and protein expressions of death receptor pathway in breast cancer MCF-7 cells. Methods: The MCF-7 cells were divided into empty plasmid,pEgr1-TRAIL plasmid,4.0 Gy X-ray,empty plasmid+4.0 Gy X-ray, and pEgr1 TRAIL+4.0 Gy X-ray groups.Real-time PCR method was used to detect the expression levels of DR4,caspase-9,and caspase-6 mRNA in the MCF-7 cells in various groups;Western blotting method was used to detect the relative expression levels of DR4,caspase-9,and caspase-6 protein in the MCF-7 cells in various groups. Results: Compared with control group, the mRNA expression levels of DR4,caspase-9 and caspase-6 in MCF-7 cells in the other groups began to rise 4 h after 4.0 Gy X-ray irradiation(P<0.01),and they reached to the highest levels 8 h later,then reduced to the level of pre-irradiation 24 h later.The order of these mRNA expression levels from high to low in various groups was pEgr1-TRAIL+4.0 Gy X-ray group>empty plasmid+4.0 Gy X-ray group >pEgr1-TRAIL plasmid group >empty plasmid group >4.0 Gy X-ray group>control group;the expression levels of RD4,caspase-9,and caspase-6 mRNA in the MCF-7 cells in pEgr1-TRAIL+4.0 Gy X-ray group were higher than those in other groups (P<0.01).The relative expression levels of DR4,caspase-9 and caspase-6 proteins began to rise 6 h after irradiation, and reached the peak 12 h later; the relative expression levels of those protein 48 h later were still higher than those 6 h after irrdiation.The order of these protein expression levels from high to low in various group was pEgr1 TRAIL+4.0 Gy X-ray group >empty plasmid+4.0 Gy X-ray group >4.0 Gy X-ray group >pEgr1-TRAIL plasmid group >empty plasmid group >control group.The relative expression levels of DR4,caspase-9,and caspase-6 proteins in the MCF-7 cells in pEgr1-TRAIL+4.0 Gy X-ray group were higher than those in the other groups. Conclusion: pEgr1-TRAIL recombinant plasmid combined with radiation can kill and induce the apoptosis of MCF-7 cells,and its effect is better than recombinant plasmid or ionizing radiation used alone.

Key words: pEgr1-TRAIL recombinant plasmid, ionizing radiation, MCF-7 cell, death receptor pathway

中图分类号: 

  • R144.1