›› 2010, Vol. 30 ›› Issue (4): 233-240.

• 论文 •    下一篇

成体兔次黄嘌呤-鸟嘌呤磷酸核糖转移酶基因的打靶研究

  

  1. 1.新疆农业大学动物医学学院,乌鲁木齐,830052;2.新疆医科大学一附院医学研究中心新疆包虫病基础医学重点实验室,乌鲁木齐,830052;3.上海交通大学医学院实验动物科学部,上海,200025;4.东北林业大学野生动物资源学院,哈尔滨,150040
  • 收稿日期:2010-01-12 出版日期:2010-04-30 发布日期:2010-04-30
  • 基金资助:
    国家自然科学基金(30770324);上海市科委基础研究重点项目(08JC1413900)和上海市科技兴农重点攻关项目(沪农科攻字(2006)第5-3号);上海市重点学科建设项目(S30201);上海市科委资助(No.09140901000)

The Targeting Study of Rabbit HGPRT Gene

  1. 1.College of Animal Medicine of Xinjiang Agricultural University, Urumqi 830052, China;2.Medical Research Center and Xinjiang Key Lab on Echinococcosis, 1st Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, China; 3. Department of Laboratory Animal Science,School of Medicine, Shanghai JiaoTong University,Shanghai 200025,China;4. College of Wildlife Resoure of Northeast Forestry University, Harbin 120040, China
  • Received:2010-01-12 Online:2010-04-30 Published:2010-04-30

摘要: 目的 构建兔HPRT基因打靶载体。方法 在已经筛选到含有兔全长次黄嘌呤-鸟嘌呤磷酸核糖转移酶(Hypoxanthine guanine phosphoribosyl transferase,HGPRT)基因BAC克隆(LBNL1304M19)的基础上,利用Red重组系统,从此克隆上将一段12.5 kb无启动子的HGPRT基因组片段克隆到pKS-质粒上,产生pKS-HGPRT质粒。然后基于pKS-HGPRT和pEGFP-C1-SD1211质粒,构建了含有绿色荧光蛋白(GFP)及新霉素(neo)筛选标记基因的打靶载体pKS-HGPRT-neo.结果 将线性化的打靶载体通过脂质体转染的方法整合到成体兔成纤维细胞基因组中,利用G418及6-TG进行细胞克隆的抗药物筛选,共得到抗性细胞克隆20个。对细胞克隆进行PCR及测序初步鉴定,获得8个发生同源重组的细胞克隆,还需利用Southern blotting做进一步验证。结论 成功快速地构建了HPRT基因敲除型打靶载体,为下一步进行体细胞核移植制备HGPRT基因敲除转基因克隆兔奠定基础。

关键词: 基因敲除, 兔成纤维体细胞, 次黄嘌吟-鸟嘌呤磷酸核糖转移酶, 细胞筛选

Abstract: Objective To construct a rabbit HPRT gene targeting vector. Methods The rabbit full length HGPRT gene BAC clone LBNL1-304M19 is used as the template. A 12.5kb rabbit HGPRT gene fragment, which does not include promoter,is cloned into pKS- plasmid to form pKS-HGPRT recombi-nant plasmid via Gap-Repair by Red recombination system. Then we construct a GFP and neo selective targeting vector pKS-HGPRT-GFP-neo on the basis of pKS-HGPRT and pEGFP-Cl-SD1211 plasmids.Results Linearized targeting construct DNA was introduced into the rabbit fibroblasts by LipofectamineTM 2000. The positive-negative selection was performed and survival clones were screened by PCR and sequencing, and eight colonies with homologous recombination were obtained. The targeted colonies would further confirmed by Southern blotting. Constructions The knockout HPRT targeting vector was rapidly constructed and the results set a good basis for the establishment of HGPRT-knockout rabbit by gene target and nuclear transfer methods.

Key words: Knockout, Rabbit fibroblast, HGPRT, Cell isolation