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电离辐射和5-氟尿嘧啶对EL-4细胞周期的解偶联作用

刘 扬1,张 薇2,李 松3,孙延红1,张 萱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.吉林省九台市二院妇产科,吉林 九台 130515;3. 吉林省人民医院麻醉科,吉林 长春 130021
  • 收稿日期:2008-09-02 修回日期:1900-01-01 出版日期:2009-01-28 发布日期:2009-01-28
  • 通讯作者: 张 萱

Effect of ionizing radiation in combination with 5-flurouracil oncell cycle uncoupling of EL-4 cell line

LIU Yang1,ZHANG Wei2,LI Song3,SUN Yan-hong1,ZHANG Xuan1,GONG Shou-liang1   

  1. 1.MH Radiobiology Research Unit,School of Public Health,Jilin University,Changchun 130021,China; 2.Department of Obstetrics and Genecology,Second Hospital of Jiutai City,Jiutai 130515,China;3.Department of Anesthesiology,People’s Hospital of Jilin Province,Changchun 130021,China
  • Received:2008-09-02 Revised:1900-01-01 Online:2009-01-28 Published:2009-01-28
  • Contact: ZHANG Xuan

摘要: 目的:研究电离辐射和5-氟尿嘧啶(5-FU)对EL-4细胞周期解偶联的时间-效应关系和剂量-效应关系。方法:取指数生长期EL-4细胞,采用不同照射剂量(0、1.0、2.0和4.0 Gy)电离辐射和不同浓度5-FU(0、0.001、0.010、0.100和1.000 mg•L-1)处理EL-4细胞,于0、4、8、16、24和48 h后分别收集细胞,碘化丙啶(PI)荧光标记及流式细胞术(FCM)检测细胞倍体变化。结果:与假照组比较,2.0 Gy X射线照射后,EL-4细胞二倍体细胞百分率在照射后8~24 h显著增加(P<0.05或P<0.01),48 h恢复至正常水平;四倍体细胞百分率在照射后8~48 h显著降低(P<0.05或P<0.01);八倍体细胞百分率在照射后16~24 h显著降低(P<0.05)。1.0~4.0 Gy X射线照射后16 h,与假照组比较,二倍体细胞百分率剂量依赖性增加(P<0.05或P<0.01),四倍体细胞百分率呈剂量依赖性下降(P<0.01),八倍体细胞百分率变化不显著。0.100 mg•L-1 5-FU 给药后,与0 mg•L-1组比较,EL-4细胞二倍体细胞百分率在给药后16~48 h显著降低(P<0.01);四倍体细胞百分率在给药后8~24 h显著增加(P<0.05 或 P<0.01),48 h回降;八倍体细胞百分率在给药后4~16 h显著增加(P<0.05)。不同剂量5-FU给药后16 h,与0 mg•L-1组比较,EL-4细胞二倍体细胞百分率显著降低(P<0.05或P<0.01),四倍体细胞百分率显著增加(P<0.05或P<0.01),二者变化在0.001~1.000 mg•L-1剂量范围内呈剂量依赖性;八倍体细胞百分率仅在0.010和0.100 mg•L-1组显著增加(P<0.05或P<0.01)。结论:1.0~4.0 Gy电离辐射无诱导EL-4细胞发生细胞周期解偶联作用,0.010~0.100 mg•L-1 5-FU可以诱导EL-4细胞发生细胞周期解偶联。

关键词: 电离, 5-氟尿嘧啶, 细胞周期, 解偶联, EL-4细胞

Abstract: Abstract:Objective To observe the dose- and time-effect of ionizing radiation in combination with 5-flurouracil (5-FU)  on the cell cycle uncoupling of EL-4 cell line.Methods EL-4 cells were collected after irradiation with 0,1.0,2.0 and 4.0 Gy X-irradiation and treatment with 5-FU (0.001,0.010,0.100 and 1.000 mg•L-1) for 0,4,8,16,24 and 48 h. The regularity in the polyloid cells was analyzed by flow cytometry (FCM) following staining cells with propidium iodide (PI). Results As compared with sham-irradiation group,the percentage of diploid EL-4 cells increased significantly at 8-24 h and returned to normal level at 48 h after irradiation with 2.0 Gy X-rays (P< 0.05 or P< 0.01); the percentage of tetraploid cells began to decrease at 8 h and still to remain lower level at 48 h (P< 0.05 or P< 0.01);the percentage of octoploid cells 〖JP3〗decreased obviously at 16-24 h (P< 0.05). As compared with sham-irradiation group,the percentage of diploid EL-4 cells increased significantly 16 h after irradiation with 1.0-4.0 Gy X-rays (P< 0.05 or P< 0.01),while that of tetraploid cells decreased in a dose-dependent manner(P< 0.01),the percentage of octoploid cells had no marked changes.As compared with 0 mg•L-1 group,the percentage of diploid cells decreased obviously at 16-48 h after treatment with 0.100 mg•L-15-FU(P< 0.01);the percentage of tetraploid cells increased significantly at 8-24 h and returned to normal level at 48 h;the percentage of octoploid cells increased obviously at 4-16 h (P< 0.05).As compared with 0 mg•L-1 group,the percentage of diploid cells decreased significantly 16 h after treatment with different doses 5-FU (P< 0.05 or P< 0.01); while that of tetraploid cells increased significantly (P< 0.05 or P< 0.01),they displayed in a dose-dependent manner in 0.001-1.000 mg•L-1; the percentage of octoploid cells increased significantly after treatment with 0.010 and 0.100 mg•L-1 5-Fu (P< 0.01).Conclusion The cell cycle uncoupling of EL-4 cell line couldn’ t be induced by 1.0-4.0 Gy X-rays,but could be induced by 0.010 and 0.100 mg•L-1 5-FU.

Key words: ionizing, 5-flurouracil, cell cycle, uncoupling, EL-4 cells

中图分类号: 

  • R811