南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (2): 332–338.doi: 10.13232/j.cnki.jnju.2019.02.018

• • 上一篇    

VDR基因肠上皮特异性敲除小鼠的构建及其对炎症性肠病的影响

肖梦君,吴俊仙,张 娜,陈 昕,饶泽兵,陈允梓*   

  1. 南京医科大学基础医学院,南京,211166
  • 接受日期:2018-12-25 出版日期:2019-04-01 发布日期:2019-03-31
  • 通讯作者: 陈允梓 E-mail:chenyunzi@njmu.edu.cn
  • 基金资助:
    国家自然科学基金(81871310,81371759)

Construction of VDR gene intestinal epithelial specific knockout mice and its effect on inflammatory bowel disease

Xiao Mengjun,Wu Junxian,Zhang Na,Chen Xin,Rao Zebing,Chen Yunzi*   

  1. School of Basic Medical Sciences,Nanjing Medical University,Nanjing,211166,China
  • Accepted:2018-12-25 Online:2019-04-01 Published:2019-03-31
  • Contact: Chen Yunzi E-mail:chenyunzi@njmu.edu.cn

摘要: 采用Cre/loxP条件性基因敲除技术构建肠上皮敲除VDR(Vitamin D receptor)基因小鼠. 利用Casp9方法构建的VDRflox/flox小鼠与Villin-Cre转基因小鼠进行繁殖杂交获得VDR肠上皮特异敲除小鼠,其基因型鉴定为VDRflox/floxVillin-Cre+. 通过建立小鼠TNBS诱导的炎症性肠病模型,比较肠上皮特异敲除VDR基因的小鼠与野生型小鼠的发病程度,结果显示VDR基因条件敲除小鼠,体重下降更加明显,肠损伤和病理评分更加严重,说明了肠上皮中的VDR缺失促进肠炎发生,预示其对肠上皮具有保护作用. 本研究为进一步探讨肠上皮VDR的表达对炎症性肠病的作用机制提供坚实基础和强有力的研究平台.

关键词: 基因敲除, Cre/loxP技术, VDR基因, 炎症性肠病

Abstract: To generate and identify the intestinal epithelium VDR(Vitamin D receptor)gene knockout mice through the Cre/loxP conditional gene knockout technology,VDRflox/flox mice constructed by casp9 and the mice which expressed intestinal epithelium cell-specific Cre recombinase were bred. Then,the two kinds of mice were crossed,and the offspring mice which genotyping VDRflox/flox Villin-Cre+were the mice. By establishing a mouse model of inflammatory bowel disease(IBD)induced by TNBS,the incidence of intestinal epithelial-specific VDR knockdown mice and wild-type mice was compared. The results showed that intestinal epithelial-specific VDR knockdown mice had significant weight loss,intestinal injury score and the pathological score was more serious,indicating that the VDR loss in the intestinal epithelium promotes the occurrence of IBD,and that it had a protective effect on the intestinal epithelium. Furthermore,this study will provide a solid foundation and a powerful research platform for further exploration of the mechanism of action of intestinal epithelial VDR on inflammatory bowel disease.

Key words: gene knockout, Cre/loxP, VDR, inflammatory bowel disease

中图分类号: 

  • Q310.34
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