期刊
JOURNAL OF NEUROSCIENCE
卷 37, 期 9, 页码 2305-2316出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.2414-16.2016
关键词
lateral septum; midbrain dopaminergic neurons; Neurod1; Neurod6; neuronal diversity; ventral tegmental area
资金
- Francis Crick Institute
- United Kingdom Medical Research Council
- Wellcome Trust
- Medical Research Council [MC_U117570533, 1249830] Funding Source: researchfish
- The Francis Crick Institute [10089, 10009] Funding Source: researchfish
- MRC [MC_U117570533] Funding Source: UKRI
Midbrain dopaminergic neuronsare highly heterogeneous. They differ in their connectivity and firing patterns and, therefore, in their functional properties. The molecular underpinnings of this heterogeneity are largely unknown, and there is a paucity of markers that distinguish these functional subsets. In this paper, we report the identification and characterization of a novel subset of midbrain dopaminergic neurons located in the ventral tegmental area that expresses the basic helix-loop-helix transcription factor, Neurogenic Differentiation Factor-6 ( NEUROD6). Retrograde fluorogold tracing experiments demonstrate that Neurod6(+) midbrain dopaminergic neurons neurons project to two distinct septal regions: the dorsal and intermediate region of the lateral septum. Loss-of-function studies in mice demonstrate that Neurod6 and the closely related family member Neurod1 are both specifically required for the survival of this lateral-septum projecting neuronal subset during development. Our findings underscore the complex organization of midbrain dopaminergic neurons and provide an entry point for future studies of the functions of the Neurod6(+) subset of midbrain dopaminergic neurons.
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