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筛选化学诱变原的RNR3调控重组Lac Z 基因酵母细胞的建立

王瑞鲲,葛宜枝,陆益新,吴倩倩,李湘鸣*   

  1. 扬州大学医学院预防医学教研室,江苏  扬州  225001
  • 收稿日期:2013-11-25 修回日期:2014-02-24 出版日期:2014-05-30 发布日期:2014-05-30
  • 通讯作者: 李湘鸣,Tel:0514-87970073;E-mail:lxm571009@aliyun.com
  • 作者简介:王瑞鲲(1988- ),男,河南洛阳人,硕士,研究方向:卫生毒理学。E-mail:840264190@qq.com.
  • 基金资助:

    国家自然科学基金资助(81041111)

Development of recombinant Lac Z gene yeast cell regulated by RNR3 promoter for screening chemical mutagens

WANG Rui-kun,GE Yi-zhi,LU Yi-xin,WU Qian-qian,LI Xiang-ming*   

  1. Preventive Medicine Department, Medical College of Yangzhou University, Yangzhou 225001, Jiangsu, China
  • Received:2013-11-25 Revised:2014-02-24 Online:2014-05-30 Published:2014-05-30

摘要:

目的:建立可筛选化学诱变物的RNR3调控重组Lac Z 基因酵母细胞。方法:利用降式PCR技术从酵母基因组中扩增RNR3 启动子,将其插入到pMP206/ERE酵母报告载体,构建成RNR3调控的Lac Z酵母报告载体,将该载体转入W303-1A酵母细胞,构建成RNR3调控的重组Lac Z 基因酵母细胞。用数种化学诱变原作用于该重组基因酵母细胞,观察其对RNR3的诱导表达。结果:放线菌素D、丝裂霉素C、阿非迪霉素和溴乙锭不能诱导RNR3的表达,而甲磺酸甲脂、瘤可宁、顺铂、4-硝基-N-氧化喹啉、博来霉素、福莱霉素、5-氟尿嘧啶、喜树碱和羟基脲诱变原与RNR3表达有明显的剂量效应关系。结论:该重组酵母可用于对多种化学诱变原的快速筛选。

关键词: 化学诱变原, 酵母, &beta, -半乳糖苷酶, Lac Z 基因

Abstract:

OBJECTIVE: To establish recombinant Lac Z yeast cells regulated by RNR3 in order to screen chemical mutagens. METHODS:RNR3 promoter was amplified using touch down 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 W303-1A yeast cells to construct the recombinant Lac Z gene yeast cells. These yeast cells were treated by several kinds of chemical mutagens to assess the expression of RNR3. RESULTS: Actinomycin D,mitomycin C,aphidicolin and ethidium bromide could not induce RNR3 expression. Methyl methanesulfonate,chlorambucil,cisplatin,4-nitro-N-oxidation of quinoline,bleomycin,phleomycin,5-fluorouracil,camptothecin and hydroxyurea mutagen could induce RNR3 expression in a dose-dependent manner. CONCLUSION:Recombinant yeast can be used for rapid screening of many chemical mutagens.

Key words: chemical mutagen, yeast, beta galactosidase, Lac Z gene