The leak channel NALCN controls tonic firing and glycolytic sensitivity of substantia nigra pars reticulata neurons.

Abstract:

:Certain neuron types fire spontaneously at high rates, an ability that is crucial for their function in brain circuits. The spontaneously active GABAergic neurons of the substantia nigra pars reticulata (SNr), a major output of the basal ganglia, provide tonic inhibition of downstream brain areas. A depolarizing 'leak' current supports this firing pattern, but its molecular basis remains poorly understood. To understand how SNr neurons maintain tonic activity, we used single-cell RNA sequencing to determine the transcriptome of individual mouse SNr neurons. We discovered that SNr neurons express the sodium leak channel, NALCN, and that SNr neurons lacking NALCN have impaired spontaneous firing. In addition, NALCN is involved in the modulation of excitability by changes in glycolysis and by activation of muscarinic acetylcholine receptors. Our findings suggest that disruption of NALCN could impair the basal ganglia circuit, which may underlie the severe motor deficits in humans carrying mutations in NALCN.

journal_name

Elife

journal_title

eLife

authors

Lutas A,Lahmann C,Soumillon M,Yellen G

doi

10.7554/eLife.15271

subject

Has Abstract

pub_date

2016-05-13 00:00:00

issn

2050-084X

journal_volume

5

pub_type

杂志文章

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