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Hoechst33342/PI双染法和TUNEL染色技术检测神经细胞凋亡的对比研究

杨细飞1,贺春娥1,2,汤瑞华1,田生礼2,*,刘建军1,*   

  1. 深圳市疾病预防控制中心,深圳市现代毒理学重点实验室,广东  深圳  518055
  • 收稿日期:2014-02-27 修回日期:2014-03-18 出版日期:2014-05-30 发布日期:2014-05-30
  • 通讯作者: 田生礼,刘建军,E-mail:sltian@szu.edu.cn
  • 作者简介:杨细飞(1978- ),男,湖北省人,博士,副研究员,研究方向:纳米材料的神经毒性研究。
  • 基金资助:

    国家自然科学基金(81102154);广东省医学科研基金资助项目(B2012322);深圳市科学研究计划(医疗卫生类)(201202086);深圳市重点实验室提升项目(ZDSY20120615085804889)

A comparative study on the measurement of neuronal cell apoptosis by Hoechst33342/PI double staining and TUNEL assay

YANG Xi-fei1,HE Chun-e1,2,TANG Rui-hua1,TIAN Sheng-li2,*,LIU Jian-jun1,*   

  1.  Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Health Toxicology and Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055
  • Received:2014-02-27 Revised:2014-03-18 Online:2014-05-30 Published:2014-05-30

摘要:

目的: 利用Hoechst33342/PI双染法和原位末端标记法(TUNEL)染色检测纳米二氧化硅(nm-SiO2)对神经细胞凋亡的影响,比较两种检测方法的优缺点。方法:以体外培养的人神经母细胞瘤SK-N-SH为研究对象,15和30 nm粒径的nm-SiO2(剂量为2.5、5、10 μg/mL)分别处理细胞24 h,另设1~5 μm SiO2组和溶剂对照组,采用Hoechst33342/PI双染法和TUNEL染色检测各处理组对SK-N-SH细胞凋亡的影响。结果:与对照组相比,两种检测方法分析均显示了nm-SiO2处理组SK-N-SH细胞凋亡率显著增加(P<0.05),且具有尺寸、剂量依赖性,而微米级SiO2对凋亡的影响不显著(P>0.05)。结论:nm-SiO2能诱导SK-N-SH细胞凋亡。Hoechst33342/PI双染法特异性高,简单易行;TUNEL法灵敏度高,能检测少量的细胞凋亡,但成本较高,两种方法可结合使用以便更加准确的检测神经细胞的凋亡。

关键词: 纳米二氧化硅, 神经细胞, 凋亡, Hoechst33342/PI双染, TUNEL

Abstract:

OBJECTIVE: To evaluate the effects of nano-silica(nm-SiO2) on apoptosis of neuroblastoma cells,and compare the advantages and disadvantages of Hoechst33342/PI staining and TUNEL assay in apoptosis measurement. METHODS:Cultured human neuroblastoma SK-N-SH cells were treated with nm-SiO2 (15 and 30 nm) and micro-sized SiO2 at different doses (2.5,5 and 10 μg/mL) for 24 h. Apoptotic cells were detected by Hoechst33342/PI and TUNEL staining. RESULTS:Compared with normal control,the percentages of total apoptosis in nm-SiO2-treated cells were significantly increased by both methods. CONCLUSION:nm-SiO2 increased apoptosis of SK-N-SH cells in a dose- and size-dependent manner. Hoechst33342/PI is more specific,cheaper and simpler,while TUNEL assay is more sensitive. It is recommended to combine these two methods to assess apoptosis in neuronal cells.

Key words: nm-SiO2, neuronal cells, apoptosis, Hoechst33342/PI double staining, TUNEL