Molecular mechanisms of neuronal polarity

Takeshi Yoshimura, Yoji Kawano, Nariko Arimura, Saeko Kawabata, Kozo Kaibuchi


3 被引用数 (Scopus)


Neurons are one of the most highly polarized cells known and are comprised of two structurally and functionally distinct parts, an axon and dendrites. The specification of the axon is thought to depend on its length relative to the other minor processes, which are called immature neurites. Elongation of one of immature neurites is necessary for axon specification. We previously showed that collapsin response mediator protein-2 (CRMP-2) is critical for specifying axon/dendrite fate, possibly by promoting neurite elongation via microtubule assembly. Here, we showed that glycogen synthase kinase-3β (GSK-3β) phosphorylated CRMP-2 at Thr-514 and inactivated it. The expression of the nonphosphorylated form of CRMP-2 or inhibition of GSK-3β induced the formation of multiple axons in hippocampal neurons. The expression of constitutively active GSK-3β impaired neuronal polarization, whereas the nonphosphorylated form of CRMP-2 counteracted the inhibitory effects of GSK-3β, indicating that GSK-3β regulates neuronal polarity through the phosphorylation of CRMP-2. We here reviewed the molecular mechanisms of the axon formation.

ジャーナルJapanese Journal of Neuropsychopharmacology
出版ステータスPublished - 8月 2005

ASJC Scopus subject areas

  • 臨床心理学
  • 薬理学
  • 精神医学および精神衛生
  • 薬理学(医学)


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