Neural recognition molecules CHL1 and NB-3 regulate apical dendrite orientation in the neocortex via PTPα

Haihong Ye, Yen Ling Jessie Tan, Sathivel Ponniah, Yasuo Takeda, Shi Qiang Wang, Melitta Schachner, Kazutada Watanabe, Catherine J. Pallen, Zhi Cheng Xiao

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Apical dendrites of pyramidal neurons in the neocortex have a stereotypic orientation that is important for neuronal function. Neural recognition molecule Close Homolog of L1 (CHL1) has been shown to regulate oriented growth of apical dendrites in the mouse caudal cortex. Here we show that CHL1 directly associates with NB-3, a member of the F3/contactin family of neural recognition molecules, and enhances its cell surface expression. Similar to CHL1, NB-3 exhibits high-caudal to low-rostral expression in the deep layer neurons of the neocortex. NB-3-deficient mice show abnormal apical dendrite projections of deep layer pyramidal neurons in the visual cortex. Both CHL1 and NB-3 interact with protein tyrosine phosphatase α (PTPα) and regulate its activity. Moreover, deep layer pyramidal neurons of PTPα-deficient mice develop misoriented, even inverted, apical dendrites. We propose a signaling complex in which PTPα mediates CHL1 and NB-3-regulated apical dendrite projection in the developing caudal cortex.

Original languageEnglish (US)
Pages (from-to)188-200
Number of pages13
JournalEMBO Journal
Volume27
Issue number1
DOIs
StatePublished - Jan 9 2008

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

Keywords

  • Adhesion
  • Dendrite development
  • p59fyn

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