A Unique “Reversed” Migration of Neurons in the Developing Claustrum

Kota Oshima, Satoshi Yoshinaga, Ayako Kitazawa, Yuki Hirota, Kazunori Nakajima, Ken Ichiro Kubo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The claustrum (CLA) is a cluster of neurons located between the insular cortex and striatum. Many studies have shown that the CLA plays an important role in higher brain function. Additionally, growing evidence suggests that CLA dysfunction is associated with neuropsychological symptoms. However, how the CLA is formed during development is not fully understood. In the present study, we analyzed the development of the CLA, especially focusing on the migration profiles of CLA neurons in mice of both sexes. First, we showed that CLA neurons were generated between embryonic day (E) 10.5 and E12.5, but mostly at E11.5. Next, we labeled CLA neurons born at E11.5 using the FlashTag technology and revealed that most neurons reached the brain surface by E13.5 but were distributed deep in the CLA 1 d later at E14.5. Time-lapse imaging of GFP-labeled cells revealed that some CLA neurons first migrated radially outward and then changed their direction inward after reaching the surface. Moreover, we demonstrated that Reelin signal is necessary for the appropriate distribution of CLA neurons. The switch from outward to “reversed” migration of developing CLA neurons is distinct from other migration modes, in which neurons typically migrate in a certain direction, which is simply outward or inward. Future elucidation of the characteristics and precise molecular mechanisms of CLA development may provide insights into the unique cognitive functions of the CLA.

Original languageEnglish
Pages (from-to)693-708
Number of pages16
JournalJournal of Neuroscience
Volume43
Issue number5
DOIs
Publication statusPublished - 2023 Feb 1

Keywords

  • claustrum
  • development
  • migration
  • neuron

ASJC Scopus subject areas

  • General Neuroscience

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