基础医学与临床 ›› 2014, Vol. 34 ›› Issue (5): 679-683.

• 研究论文 • 上一篇    下一篇

利用96 孔板和RNR3调控的重组Lac Z基因酵母细胞对化学诱变原的筛选

葛宜枝,王瑞鲲,王磊,谢云斌,刘星妍,李湘鸣   

  1. 扬州大学医学院
  • 收稿日期:2013-08-27 修回日期:2013-10-27 出版日期:2014-05-05 发布日期:2014-04-28
  • 通讯作者: 李湘鸣 E-mail:847264344@qq.com

Screen for chemical mutagens based on the recombinant Lac Z gene yeast cells regulated by RNR3 promoter and 96 - well micro plates

  • Received:2013-08-27 Revised:2013-10-27 Online:2014-05-05 Published:2014-04-28

摘要: 目的 建立化学致突变物的体外快速筛方法 方法 用PCR法从酵母基因组中扩增RNR3启动子,将其插入到pMP206/ERE报告载体,将该载体转入W303-1A酵母细胞。当化学诱变原作用于酵母细胞时,会诱导β-半乳糖苷酶表达,可对具有DNA毒性的化学物进行筛选。结果 许多可造成DNA损伤的化学诱变原可诱导RNR3的表达。使DNA发生烷基化的诱变原(甲磺酸甲脂和瘤可宁)、使DNA发生断裂的诱变原(顺铂、4-硝基-N-氧化喹啉、博来霉素和福来霉素)、抑制DNA合成酶或拓扑异构酶的诱变原(5-氟尿嘧啶、羟基脲和喜树碱)均可诱导RNR3的表达。 结论 RNR3调控的重组Lac Z报告基因酵母可用于对许多化学诱变原的筛选,筛选过程可在96孔板中进行,因而具有高通量性。

关键词: 关键词:诱变原, 酵母, RNR3基因, β-半乳糖苷酶

Abstract: Objective To develop a rapid screening method for chemical mutagens in vitro. Methods RNR3 promoter was amplified using polymerase chain reaction (PCR) from yeast genome and inserted into the yeast report vector of pMP206 / ERE to construct yeast Lac Z gene report vector regulated by RNR3. This vector was transformed into the yeast cell of W303-1A. When the yeast cell was treated by the chemical mutagenesis, the expression of Lac Z gene was induced. So it can be used to screen the chemicals with DNA toxicity by measuring the beta - galactose enzyme activity. Results Various chemicals that cause DNA damaged can induce RNR3 expression. The mutagens alkylating DNA (methyl methanesulfonate and chlorambucil), the cleavages of DNA (cisplatin, 4- nitro -N- oxidation of quinoline, bleomycin and phleomycin) and the inhibitor of DNA polymerase or topoisomerase (5- fluorouracil, hydroxyurea and camptothecin) can induce RNR3 expression. Conclusions The recombinant Lac Z report gene yeast cells regulating by RNR3 can be used for the screening of many chemical mutagen and this screen can be carried out in 96 well micro plate, so it has a high throughput.

Key words: Keywords: mutagens, yeast cells, RNR3 gene, β-galactosidase