高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (9): 1393.

• 论文 • 上一篇    下一篇

DNA电化学传感器在DNA损伤研究中的应用

孙星炎, 徐春, 刘盛辉, 何品刚, 方禹之   

  1. 华东师范大学化学系, 上海, 200062
  • 收稿日期:1997-12-01 出版日期:1998-09-24 发布日期:1998-09-24
  • 通讯作者: 方禹之
  • 作者简介:孙星炎,男,43岁,讲师,博士研究生.
  • 基金资助:

    国家自然科学基金(批准号:29575197)资助课题.

Application in the Damage of DNA by Electrochemical DNA Sensor

SUN Xing-Yan, XU Chun, LIU Sheng-Hui, HE Pin-Gang, FANG Yu-Zhi   

  1. Department of Chemistry, East China Normal University, Shanghai, 200062
  • Received:1997-12-01 Online:1998-09-24 Published:1998-09-24

摘要: 利用单链DNA分子共价固定在石墨电极表面,采用核酸分子杂交技术,以道诺霉素作为杂交指示剂形成DNA电化学传感器.研究了在不同致突变剂的作用下,特定碱基序列的DNA在电极表面能否杂交及杂交程度的差异,探讨了DNA突变情况及可能的突变机理.

关键词: DNA, 电化学传感器, 道诺霉素, 核酸分子杂交, 伏安法

Abstract: Mutation and damage in DNAby interaction, UV-irralation, nitrite action and ultrasonication were studied by means of voltammetry using a graphite electrode covalently immobilied with ssDNA-1. Daunomycin was used as a hybidization indicator. When the complementary ssDNA-2 in solution was damaged by phsical or chemical agents, the hybridization of ssDNA-1 and ssDNA-2 was changed. All the results in voltammogram indicated that intercalator can't destroy the double-helical structure of DNA, while UV-irralation and nitrite action can make the permanent damage. Ultrasonication can reduce polymerization in DNAand the hybridization time was shortened. This may provide a new method for clinical medicine study.

Key words: DNA, Electrochemical sensor, Daunomycin, Hybridization of nucleic acid molecules, Voltammetry

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