您现在的位置: 绿色健康网 >> 医学论文 >> 基础医学论文 >> 正文  

奥替普拉诱发人肺腺癌细胞凋亡的研究

柏华 罗贤懋 胡国刚 魏慧娟 陈凤 朱明

  摘要 目的 探讨奥替普拉(oltipraz)能否诱发人肺腺癌细胞凋亡及其机制。方法 应用光镜、DNA电泳、流式细胞仪、活细胞视频观察进行检测和分析。结果 癌细胞在奥替普拉作用下,细胞分裂阻滞在分裂中期,G2/M百分比增高,出现细胞凋亡峰,凋亡细胞出现胞体固缩、核染色质凝聚或者断裂,细胞DNA裂解片段呈现典型的“梯形”条带。奥替普拉诱导的GLC细胞凋亡在使用浓度120 μg/ml时效果明显。结论 奥替普拉在适当浓度时能够诱发人肺腺癌细胞凋亡,这种作用与分裂期阻滞密切相关。
  关键词 吡嗪类 脱噬作用 肺肿瘤 腺癌

Studies on Apoptosis of Human Lung Adenocarcinoma Cells Induced by Oltipraz

BAI Hua, LUO Xianmao, HU Guogang, et al.
Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021

  Abstract Objective To study whether oltipraz can induce apoptosis of human lung adenocarcinoma (GLC-82) cells and its possible mechanism. Methods Light microscopy, DNA electrophoresis, flow cytometry and video time-lapse monitoring were used to observe apoptosis of GLC-82 induced by oltipraz. Results GLC-82 cells treated with oltipraz underwent the arrest of cell mitosis at metaphase, higher percentage of G2/M and peak of apoptosis were found, and cell body shrunk, nuclear chromosome condensed or fragmented and nuclear DNA fragment displayed “laden” bands in apoptic cells. Apoptosis of GLC-82 induced by oltipraz was more obvious at a concentration of 120 μg/ml. Conclusion Oltipraz could induce apoptosis of GLC-82 at certain concentrations, which associated closely with the arrest of mitotic cycle.
  Key words Pyrazines Apoptosis Lung neoplasms Adenocarcinoma

  奥替普拉(oltipraz)是从十字花科(cruciferase)蔬菜等绿色植物中提取的巯基类化合物,中文全称为5-(2-吡嗪基)-4-甲1,2-二羟基-3-硫酮;它对多种癌症包括肝癌、胃癌、结肠癌、肺癌、胰腺癌等均有较好防治作用。奥替普拉防治癌症的机制可能是与减少致癌性的DNA加成物形成,减低酪氨酸蛋白激酶(TPK)活性,增加谷胱甘肽转移酶(GST)、环氧化脱氢酶、P450、NADPH∶QR等解毒酶活性有关[1]。我们在研究奥替普拉阻断人肺早期癌变的基础上,探讨奥替普拉的促细胞凋亡作用,揭示奥替普拉防癌抑癌的机制。

材料与方法

  1.细胞培养和药物:人肺腺癌细胞(GLC-82)生长在含10%胎牛血清和0.5%青链霉素的RPMI-1640(Gibco,美国)培养基中,细胞贴壁生长。奥替普拉由美国国立卫生研究院(NIH)Bourat博士赠送,纯度99.7%,溶解在100%二甲基亚砜(DMSO)中,工作浓度为50~250 μg/ml不等。
  2.光镜观察:经奥替普拉处理后的

[1] [2] 下一页


  • 上一个医学论文:

  • 下一个医学论文:
  • 相关文章
    奥替普拉和反义GST
    普拉固降脂疗效观察
    硫酸普拉酮钠促产程进展60例临床分析
    Copyright © 2006-2012 绿色健康网(www.gio.org.cn) All Rights Reserved.
    声明:网站信息仅供参考,不能作为诊断及医疗的依据。