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Dynamics of the leading process, nucleus, and Golgi apparatus of migrating cortical interneurons in living mouse embryos
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- Mitsutoshi Yanagida
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
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- Ryota Miyoshi
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
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- Ryohei Toyokuni
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
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- Yan Zhu
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
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- Fujio Murakami
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
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Description
<jats:p>Precisely arranged cytoarchitectures such as layers and nuclei depend on neuronal migration, of which many in vitro studies have revealed the mode and underlying mechanisms. However, how neuronal migration is achieved in vivo remains unknown. Here we established an imaging system that allows direct visualization of cortical interneuron migration in living mouse embryos. We found that during nucleokinesis, translocation of the Golgi apparatus either precedes or occurs in parallel to that of the nucleus, suggesting the existence of both a Golgi/centrosome-dependent and -independent mechanism of nucleokinesis. Changes in migratory direction occur when the nucleus enters one of the leading process branches, which is accompanied by the retraction of other branches. The nucleus occasionally swings between two branches before translocating into one of them, the occurrence of which is most often preceded by Golgi apparatus translocation into that branch. These in vivo observations provide important insight into the mechanisms of neuronal migration and demonstrate the usefulness of our system for studying dynamic events in living animals.</jats:p>
Journal
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 109 (41), 16737-16742, 2012-09-24
Proceedings of the National Academy of Sciences
