Conditional brain-specific knockdown of MAPK using Cre/loxP regulated RNA interference.

Conditional brain-specific knockdown of MAPK using Cre/loxP regulated RNA interference.
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DOI:
10.1093/nar/gkm475
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发表时间:
2007
影响因子:
14.9
通讯作者:
Kühn R
Kühn R
中科院分区:
生物学2区
文献类型:
--
作者:
Hitz C;Wurst W;Kühn R

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近年来,RNA干扰(RNAi)介导的基因敲低已发展成为一种快速、简便地评估哺乳动物细胞基因功能的常规方法。为了在发育中或成年小鼠中使用该技术,从基因组稳定表达的短发夹(sh)RNA载体是常规敲除方法的更快替代方案。在这里,我们描述了一种先进的策略,在小鼠中的条件基因敲低,在那里我们使用的Cre/loxP系统激活RNAi在成年小鼠大脑中的时间和组织依赖性的方式。通过将条件性RNAi构建体置于定义的基因组Rosa 26位点中,并通过使用重组酶介导的盒交换(RMCE)而不是费力的同源重组,我们开发了一种快速,简单和可重复的方法来评估成年小鼠的基因功能。我们将这种技术应用于MAPK信号通路的三个基因Braf,Mek 1和Mek 2,并在这里展示了这种新工具在小鼠诱变中的潜力。
In the last years, RNA interference (RNAi)-mediated gene knockdown has developed into a routine method to assess gene function in cultured mammalian cells in a fast and easy manner. For the use of this technique in developing or adult mice, short hairpin (sh)RNA vectors expressed stably from the genome are a faster alternative to conventional knockout approaches. Here we describe an advanced strategy for conditional gene knockdown in mice, where we used the Cre/loxP system to activate RNAi in a time and tissue dependent manner in the adult mouse brain. By placing conditional RNAi constructs into the defined genomic Rosa26 locus and by using recombinase mediated cassette exchange (RMCE) instead of laborious homologous recombination, we developed a fast, easy and reproducible approach to assess gene function in adult mice. We applied this technique to three genes of the MAPK signaling pathway—Braf, Mek1 and Mek2—and demonstrate here the potential of this new tool in mouse mutagenesis.
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