转基因小鼠过表达人Lin28A/Lin28B对小鼠体重的影响

被引:1
|
作者
李蕾
陈霞
史剑
潘筱云
李建民
机构
[1] 南京医科大学基础医学院
关键词
Lin28基因; 转基因小鼠; 小鼠体重;
D O I
10.13241/j.cnki.pmb.2013.18.009
中图分类号
R346 [];
学科分类号
摘要
目的:Lin28是一种高度保守的RNA结合蛋白,对生物体的生命活动具有重要的调节作用。为了研究人Lin28A与Lin28B基因的功能,我们构建了分别过表达人Lin28A或Lin28B基因的两种转基因小鼠,表型分析发现小鼠体重变化,为研究Lin28A和Lin28B基因的生物学功能提供模型动物。方法:分别将人类Lin28A与Lin28B cDNA插入PCAG启动子下游,构建Lin28A与Lin28B转基因表达载体,通过显微注射方法,分别建立Lin28A转基因小鼠与Lin28B转基因小鼠。PCR鉴定转基因小鼠的基因型,筛选出人类Lin28A与Lin28B表达的小鼠,统计两种转基因小鼠体重变化。结果:①经PCR鉴定与公司测序证明Lin28A和Lin28B两种载体构建成功。②PCR鉴定小鼠基因型,筛选出可以特异性表达人Lin28A或Lin28B的转基因小鼠,并比较转基因小鼠与同窝野生型小鼠体重,发现两种转基因小鼠体重均大于同窝野生型小鼠,说明在小鼠体内过表达Lin28A或Lin28B均能引起小鼠体重增加。结论:人Lin28A与Lin28B在转基因小鼠体内能正常表达,并且能发挥生物学功能。又因为Lin28A和Lin28B在小鼠体内过表达会引起小鼠体重增加,我们推测其可能通过影响小鼠糖代谢过程引起小鼠体重改变。构建的Lin28A和Lin28B的转基因小鼠为进一步研究Lin28A和Lin28B在人新陈代谢、生长和发育过程中的作用提供了动物模型。
引用
收藏
页码:3415 / 3419
页数:5
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