A new mouse line for cell ablation by diphtheria toxin subunit A controlled by a Cre-dependent FLEx switch.

A new mouse line for cell ablation by diphtheria toxin subunit A controlled by a Cre-dependent FLEx switch.
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DOI:
10.1002/dvg.23067
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发表时间:
2017-10
期刊:
Genesis (New York, N.Y. : 2000)
影响因子:
--
通讯作者:
Jensen P
Jensen P
中科院分区:
其他
文献类型:
--
作者:
Plummer NW;Ungewitter EK;Smith KG;Yao HH;Jensen P

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表达白喉毒素亚基A(DTA)的白喉毒素酶应答小鼠系是用于靶向消融遗传上确定的细胞群的良好建立的工具。在这里,我们描述了一个新的基因敲入等位基因的GT(罗莎)26Sor基因座,保留了以前描述的DTA等位基因的最佳功能,包括CAG启动子,减毒突变DTA cDNA,和无处不在的EGFP标签,增加了一个铬依赖的FLEx开关的表达的严格控制。FLEx开关由两对反平行的lox位点组成,需要Cre介导的重组来将DTA翻转到正确的转录方向。我们证明了它的实用性,通过依赖于铬消融的一个广泛的域在胚胎神经系统和一个离散的人口在胎儿性腺细胞。我们的结论是,这种新的DTA线是有用的基因定义的细胞群体的靶向消融。
Recombinase responsive mouse lines expressing diphtheria toxin subunit A (DTA) are well established tools for targeted ablation of genetically defined cell populations. Here we describe a new knock-in allele at the Gt(Rosa)26Sor locus that retains the best features of previously described DTA alleles—including a CAG promoter, attenuated mutant DTA cDNA, and ubiquitous EGFP labeling—with the addition of a Cre-dependent FLEx switch for tight control of expression. The FLEx switch consists of two pairs of antiparallel lox sites requiring Cre-mediated recombination for inversion of the DTA to the proper orientation for transcription. We demonstrate its utility by Cre-dependent ablation of both a broad domain in the embryonic nervous system and a discrete population of cells in the fetal gonads. We conclude that this new DTA line is useful for targeted ablation of genetically-defined cell populations.
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