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Construction of transgenic mice containing human mutant p53 and EB virus latent membrane protein 1
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- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 1
- DOI:
- 10.3321/j.issn:1000-2790.2006.01.004
- Key Word:
- 突变型p53基因;LMP1基因;鼻咽癌前病变;转基因小鼠
Abstract： 目的:建立含突变型p53和EB病毒LMP1基因的双转基因小鼠模型,为研究突变型p53和EB病毒LMP1基因在鼻咽癌前病变中的交互作用提供有力的工具. 方法:通过分子克隆技术构建含突变型p53基因和EB病毒LMP1基因的真核表达载体pLMP1-p53mt;采用显微注射法将线性化的表达载体注射至小鼠受精卵的雄性原核中,然后将注射存活的受精卵植入假孕母鼠的输卵管;取其产3 wk龄子代鼠进行PCR初选,再通过Southern杂交进一步确证;利用HE染色法观察4 mo龄转基因小鼠不同组织病理变化. 结果:将转基因载体进行了707枚小鼠受精卵的显微注射,然后植入30只假孕母鼠的输卵管中,其中26只母鼠怀孕,移植成功率为86.67%;共出生子代鼠179只;PCR检测显示179只子代小鼠中有9只整合了p53mt和LMP1基因,转基因阳性小鼠比例为5.03%(9/179),Southern杂交结果进一步证实了9只基因组整合了外源基因的首建者小鼠;随机抽取其中的1只转基因阳性小鼠鼻腔黏膜、鼻咽、食管表现炎症,鼻咽黏膜上皮灶性增生. 结论:成功建立整合人突变型p53和LMP1的转基因小鼠,且表现鼻咽黏膜上皮灶性增生,可为鼻咽癌前病变机制的研究提供手段.
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