Generation of a DAT-P2A-Flpo mouse line for intersectional genetic targeting of dopamine neuron subpopulations.

Generation of a DAT-P2A-Flpo mouse line for intersectional genetic targeting of dopamine neuron subpopulations.
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生成 DAT-P2A-Flpo 小鼠品系,用于多巴胺神经元亚群的交叉遗传靶向。

DOI:
10.1016/j.celrep.2021.109123
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发表时间:
2021-05-11
期刊:
影响因子:
8.8
通讯作者:
Bateup HS
Bateup HS
中科院分区:
生物学1区
文献类型:
--
作者:
Kramer DJ;Aisenberg EE;Kosillo P;Friedmann D;Stafford DA;Lee AY;Luo L;Hockemeyer D;Ngai J;Bateup HS

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多巴胺能投射对大脑多个区域产生广泛影响,并调节各种行为,包括运动、奖励学习和动机。人们越来越认识到多巴胺神经元在基因表达、电路、生理和功能上是异质的。目前针对多巴胺神经元的方法主要是基于单基因驱动,要么标记所有多巴胺神经元,要么标记一个子集,但同时标记非多巴胺能神经元。在这里,我们建立了一个内源性Slc6a3(多巴胺活性转运体[DAT])位点表达Flpo重组酶的小鼠系。DAT-P2A-Flpo小鼠可以与表达Cre的小鼠系一起使用Cre/ flp依赖的交叉策略高效和选择性地标记多巴胺能亚群。我们通过生成DAT-P2A-Flpo来证明这种方法的实用性;特异性标记neurod6表达多巴胺神经元的NEX-Cre小鼠,该神经元投射到伏隔核内侧壳。DAT-P2A-Flpo小鼠增加了一个不断增长的遗传资源工具箱,将有助于解析由多巴胺能回路介导的各种功能。Kramer等人构建了DAT-P2A-Flpo小鼠系,利用Flp/ cre依赖构建体实现了多巴胺神经元亚群的交叉遗传靶向。他们发现,腹侧被盖区多巴胺神经元表达Neurod6引起大部分多巴胺能投射到伏隔核内侧壳和嗅结节。
Dopaminergic projections exert widespread influence over multiple brain regions and modulate various behaviors including movement, reward learning, and motivation. It is increasingly appreciated that dopamine neurons are heterogeneous in their gene expression, circuitry, physiology, and function. Current approaches to target dopamine neurons are largely based on single gene drivers, which either label all dopamine neurons or mark a subset but concurrently label non-dopaminergic neurons. Here, we establish a mouse line with Flpo recombinase expressed from the endogenous Slc6a3 (dopamine active transporter [DAT]) locus. DAT-P2A-Flpo mice can be used together with Cre-expressing mouse lines to efficiently and selectively label dopaminergic subpopulations using Cre/Flp-dependent intersectional strategies. We demonstrate the utility of this approach by generating DAT-P2A-Flpo;NEX-Cre mice that specifically label Neurod6-expressing dopamine neurons, which project to the nucleus accumbens medial shell. DAT-P2A-Flpo mice add to a growing toolbox of genetic resources that will help parse the diverse functions mediated by dopaminergic circuits. Kramer et al. generate a DAT-P2A-Flpo mouse line that enables intersectional genetic targeting of dopamine neuron subpopulations using Flp/Cre-dependent constructs. They show that ventral tegmental area dopamine neurons expressing Neurod6 give rise to the majority of dopaminergic projections to the nucleus accumbens medial shell and olfactory tubercle.
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