Objective To construct a red fluorescent protein reporter gene driven by human catalase gene promoter. Methods The red fluorescent protein reporter gene plasmid pDsRed-CATp containing human catalase gene promoter was constructed by gene recombination technique. The plasmid was transiently transfected into NIH/3T3 cells to observe their response to H_2O_2 stimulation. Results The plasmid was constructed correctly as verified by double enzyme digestion and sequence analysis. The plasmid was lowly expressed in resting NIH/3T3 cells, but the expression level increased obviously after stimulation by H_2O_2. Conclusions A red fluorescent protein reporter gene plasmid driven by human catalase gene promoter has been constructed successfully with a sensitive response to H_2O_2 stimulation. This system provides a convenient tool for the study of the regulatory mechanism of catalase gene expression.%目的 构建人过氧化氧酶(CAT)启动子驱动的红色荧光蛋白报告基因载体,为进一步研究CAT表达调控奠定基础.方法 以人类基因组DNA为模板,PCR获得-404～+16大小的肩动子片段,将其定向插入pDsRed1-1载体,构建pDsRed-CATp红色荧光蛋白报告基因载体.瞬时转染NIH/3T3细胞,观察CAT启动子对H_2O_2刺激的反应.结果 pDsRed-CATp经双酶切及DNA测序分析鉴定准确无误;该载体瞬时转染N1H/3T3细胞,静息状态呈现弱转录,H_2O_2刺激后,转录水平明显增强.结论 成功构建CAT启动子驱动的红色荧光蛋白报告基因载体,对H_2O_2刺激反应良好,为研究CAT基因表达调控提供了有效的工具.
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