Centrosomal microtubule nucleation regulates radial migration of projection neurons independently of polarization in the developing brain
Jazyk angličtina Země Spojené státy americké Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
36796357
DOI
10.1016/j.neuron.2023.01.020
PII: S0896-6273(23)00070-3
Knihovny.cz E-zdroje
- Klíčová slova
- axon formation, centrosome, microtubule, neuronal polarity, radial migration,
- MeSH
- axony metabolismus MeSH
- centrozom MeSH
- lidé MeSH
- mikrotubuly metabolismus MeSH
- mozek metabolismus MeSH
- neurony * fyziologie MeSH
- tubulin * metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- tubulin * MeSH
Cortical projection neurons polarize and form an axon while migrating radially. Even though these dynamic processes are closely interwoven, they are regulated separately-the neurons terminate their migration when reaching their destination, the cortical plate, but continue to grow their axons. Here, we show that in rodents, the centrosome distinguishes these processes. Newly developed molecular tools modulating centrosomal microtubule nucleation combined with in vivo imaging uncovered that dysregulation of centrosomal microtubule nucleation abrogated radial migration without affecting axon formation. Tightly regulated centrosomal microtubule nucleation was required for periodic formation of the cytoplasmic dilation at the leading process, which is essential for radial migration. The microtubule nucleating factor γ-tubulin decreased at neuronal centrosomes during the migratory phase. As distinct microtubule networks drive neuronal polarization and radial migration, this provides insight into how neuronal migratory defects occur without largely affecting axonal tracts in human developmental cortical dysgeneses, caused by mutations in γ-tubulin.
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