南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (2): 332338.doi: 10.13232/j.cnki.jnju.2019.02.018
• • 上一篇
肖梦君,吴俊仙,张 娜,陈 昕,饶泽兵,陈允梓*
Xiao Mengjun,Wu Junxian,Zhang Na,Chen Xin,Rao Zebing,Chen Yunzi*
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.
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