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3-AB对Hela细胞PARP表达及X线照射后Hela细胞凋亡和周期进程的影响

杜 翔1,赵红光1,王 雯2,郭 伟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.吉林大学公共卫生学院卫生毒理学教研室,吉林 长春 130021
  • 收稿日期:2006-07-10 修回日期:1900-01-01 出版日期:2007-05-28 发布日期:2007-05-28
  • 通讯作者: 龚守良

Effects of 3-AB on PARP expression of Hela cells and apoptosis and cell  cycle progression of Hela cells after X-rays irradiation

DU Xiang1,ZHAO Hong-guang1,WANG Wen2,GUO Wei1,GONG Shou-liang1   

  1. 1.MH Radiobiology Research Unit,School of Public Health,Jilin University,Changchun 130021,China; 2.Department of Toxicology,School of Public Health,Jilin University,Changchun 130021,China
  • Received:2006-07-10 Revised:1900-01-01 Online:2007-05-28 Published:2007-05-28
  • Contact: GONG Shou-liang

摘要: 目的:研究多聚(ADP-核糖)聚合酶(PARP)特异性抑制剂3-氨基苯甲酰胺(3-AB)抑制PAR后Hela细胞凋亡和周期进程的变化及PARP对电离辐射损伤细胞的作用机制。方法:采用体外传代培养的人宫颈癌上皮细胞Hela细胞为实验材料;给予Hela细胞3-AB( 5 mmol• L1) 0、2、4、8及12 h后,采用PARP单克隆抗体荧光标记,流式细胞术检测对照组及3-AB组经3-AB作用不同时间后Hela细胞中PARP蛋白表达;在给予3-AB 2 h后,对阴性对照组、单纯X线照射组及3-AB加X线照射组Hela细胞行2 Gy X线照射2、8、12及24 h后应用流式细胞术测定 Hela细胞凋亡和细胞周期进程。结果:给予3-AB后2、4、8及12 h PARP蛋白表达阳性的Hela细胞百分数均明显低于阴性对照组(P<0.01),其中在2 h时降低较明显,阳性细胞率为(7.60±1.36)%。进行2 Gy照射后2、8、12及24 h各时间点,3-AB加X线照射组Hela细胞凋亡率均明显高于单纯X线照射组(P<0.01或P<0.05),而G2期细胞百分数均低于单纯X线照射组(P<0.01或P<0.05)。结论:3-AB明显抑制Hela细胞PARP表达,增加电离辐射所致细胞凋亡并减少G2期细胞阻 滞。

关键词: 3-氨基苯甲酰胺, 辐射, 电离

Abstract: To study the changes of apoptosis and cell cycle progression of Hela cells after the poly (ADP-ribose) polymerase (PARP) was inhibited by its inhibitor 3-aminobenzamid (3-AB) and the mechanisms of PARP interaction with Hela cells damaged by irradiation. Methods Hela cell line was used.Flow cytometry (FCM) was used to examine the PARP expression of control and 3-AB groups at 0,2,4,8,12 h after administration with 5 mmol•L-1 3-AB.The percentage of apoptotic cells and cell cycle progression of control, irradiation,3-AB plus irradiation groups were measured with FCM at 2,8,12,24 h after exposure to 2 Gy irradiation following administration with 5 mmol•L-1 3-AB. Results The percentage of Hela cells with positive expression of PARP protein decreased after administration with 3-AB and there was significant difference between 3-AB plus irradiation group and control group (P<0.01),and the positive expression rate of PARP was (7.60±1.36)% at 2 h after treatment with 3-AB; the percentage of apoptotic cells in the 3-AB plus irradiation group at 2,8,12,24 h after 2 Gy irradiation were higher than those in the irradiation group (P<0.01 or P<0.05), and the percentages of G2 cells in the 3-AB plus irradiation group were lower than those in the irradiation group (P<0.01 or P<0.05) at different time points.Conclusion 3-AB could rapidly inhibit the PARP expression of Hela cells,enhance the apoptosis and block G2 arrest induced by irradiation.

Key words: 3-aminobenzamid, irradiation, ionizing

中图分类号: 

  • R146