Pak1 is involved in dendrite initiation as a downstream effector of Rac1 in cortical neurons

Kanehiro Hayashi, Toshio Ohshima*, Katsuhiko Mikoshiba

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Dendrite development in neurons is one of the bases for the formation of a complex neuronal network in the nervous system, and involvement of the Rho family GTPases, including Rac1, Cdc42, and RhoA, in dendrite formation has been demonstrated. One of the effectors of Rac1 and Cdc42, p21-activated kinase 1 (Pak1), is abundant in the brain; however, the function of Pak1 in neurons remains unknown. In order to clarify the roles of Pak1 in neurons, we introduced mutant Pak1 into immature neurons by a novel gene transfer technique using in utero electropora-tion. Introduction of constitutive active (CA)-Pak1 led to increase the number of dendrites, whereas introduction of dominant negative (DN)-Pak1 caused a reduction, and coexpression of CA-Rac1 and DN-Pak1 also resulted in a reduction in the number of dendrites. These results suggest that Pak1 regulates dendrite initiation as a downstream effector of Rac1.

Original languageEnglish
Pages (from-to)579-594
Number of pages16
JournalMolecular and Cellular Neuroscience
Issue number4
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience
  • Cell Biology


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