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Nolz1 expression is required in dopaminergic axon guidance and striatal innervation
Journal article   Open access   Peer reviewed

Nolz1 expression is required in dopaminergic axon guidance and striatal innervation

Clement Soleilhavoup, Marco Travaglio, Kieran Patrick, Pedro Garção, Elangovan Boobalan, Youri Adolfs, Ruth V Spriggs, Emma Moles-Garcia, Dalbir Dhiraj, Tony Oosterveen, …
Nature communications, Vol.11(1), pp.3111-3111
06/19/2020
DOI: 10.1038/s41467-020-16947-6
PMCID: PMC7305235
PMID: 32561725
url
https://doi.org/10.1038/s41467-020-16947-6View
Published (Version of record) Open Access

Abstract

Midbrain dopaminergic (DA) axons make long longitudinal projections towards the striatum. Despite the importance of DA striatal innervation, processes involved in establishment of DA axonal connectivity remain largely unknown. Here we demonstrate a striatal-specific requirement of transcriptional regulator Nolz1 in establishing DA circuitry formation. DA projections are misguided and fail to innervate the striatum in both constitutive and striatal-specific Nolz1 mutant embryos. The lack of striatal Nolz1 expression results in nigral to pallidal lineage conversion of striatal projection neuron subtypes. This lineage switch alters the composition of secreted factors influencing DA axonal tract formation and renders the striatum non-permissive for dopaminergic and other forebrain tracts. Furthermore, transcriptomic analysis of wild-type and Nolz1 mutant striatal tissue led to the identification of several secreted factors that underlie the observed guidance defects and proteins that promote DA axonal outgrowth. Together, our data demonstrate the involvement of the striatum in orchestrating dopaminergic circuitry formation.
Microfluidic Analytical Techniques Microinjections Carbocyanines - administration & dosage Embryo, Mammalian Tissue Culture Techniques Corpus Striatum - growth & development Axons - physiology Intracellular Signaling Peptides and Proteins - metabolism Nerve Net - physiology Nerve Tissue Proteins - genetics Mice, Knockout Nerve Tissue Proteins - metabolism Microscopy, Confocal Animals Dopaminergic Neurons - physiology Female Fluorescent Dyes - administration & dosage Axon Guidance - physiology Corpus Striatum - diagnostic imaging Intracellular Signaling Peptides and Proteins - genetics Intravital Microscopy

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