癌变·畸变·突变 ›› 2000, Vol. 12 ›› Issue (1): 12-014.doi: 10.3969/j.issn.1004-616x.2000.01.004

• 论著 • 上一篇    下一篇

H2O2 对HL - 60 细胞DNA 中8 - 羟基鸟嘌呤含量影响的研究

张海涛1 , 祝其锋1 , 莫丽儿2 , 庄海旗2 , 蔡 春3   

  1. 11 广东医学院医用生化研究所; 21 广东医学院化学教研室; 31 广东医学院中心实验室分析中心,广东湛江 524023
  • 收稿日期:1999-07-03 修回日期:1999-09-29 出版日期:2000-01-30 发布日期:2000-01-30

STUDY OF EFFECT OF H2O2 ON CONTENT OF 8 - HYDROXYGUANINES IN HL - 60 CELLULAR DNA

ZHANG Hai-tao , ZHU Qi2-eng , MO Li-er , ZHUANG Hai-qi , Cai Chun   

  1. Instit ute of Medical Biochemist ry , Guangdong Medical College , Zhanjiang 524023, China
  • Received:1999-07-03 Revised:1999-09-29 Online:2000-01-30 Published:2000-01-30

摘要: 目的与方法:本文采用气相色谱/ 氢火焰离子检测器( GC/ FID) 和气相色谱- 质谱仪选择性离子检测器(CGC/ MS -SIM) 探讨H2O2 致HL - 60 细胞氧化损伤时DNA 中氧化修饰碱基8 - 羟基鸟嘌呤(8 - oh - G) 含量的变化,观察HL - 60 细胞脂质过氧化程度和细胞内还原型谷胱甘肽/ 氧化型谷胱甘肽( GSH/ GSSG) 比值的变化。结果:结果显示H2O2 可使HL - 60 细胞丙二醛(MDA) 含量增高( P < 0. 01) ,GSH/ GSSG比值显著下降( P < 0. 01) 。细胞经H2O2 持续作用8h 可检测到DNA 中有 - 羟基鸟嘌呤的存在, H2O2 的浓度影响8 - 羟基鸟嘌呤的生成量。结论:结果提示,HL - 60 细胞脂质化水平的升高、GSH/GSSG比值下降、细胞DNA 中8 - 羟基鸟嘌呤含量变化和H2O2 浓度及作用时间有关。

关键词: HL - 60 细胞, 8 - 羟基鸟嘌呤, 还原型谷胱甘肽, 氧化型谷胱甘肽, 丙二醛

Abstract: Purpose and Methods : The 8 - hydroxyguanine is one of oxidized productions in DNA . In this report , the HL - 60 cells were t reated with varying concent ration H2O2 and different time. Content of 8 - hydrox-yguanines in DNA was detected by GC/ FID , CGC/ MS - SIM ,yields of MDA and ratio of GSH/ GSSG were measured in HL - 60 cells. Results : The results showed that yields of MDA was increased ( P < 0. 01) , ratio of GSH/ GSSG was decreased ( P < 0. 01) in HL - 60 cells damaged by H2O2 . Detection of GC/ FID and GC/ MS -SIM indicated the 8 - hydroxyguanines be produced in HL - 60 cellular DNA. Conclusion : The experiments suggested yields of MDA , ratio of GSH/ GSSG and content of 8 - hydroxyguanines depend on the concent ration of H2O2 and t reatment time.

Key words: HL - 60 cells, 8 - hydroxyguanine, H2O2, GSH, GSSG, MDA

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