Disrupted-In-Schizophrenia 1 Regulates Integration of Newly Generated Neurons in the Adult Brain

Xin Duan, Jay H. Chang, Shaoyu Ge, Regina L. Faulkner, Ju Young Kim, Yasuji Kitabatake, Xiao bo Liu, Chih Hao Yang, J. Dedrick Jordan, Dengke K. Ma, Cindy Y. Liu, Sundar Ganesan, Hwai Jong Cheng, Guo li Ming, Bai Lu, Hongjun Song

Research output: Contribution to journalArticlepeer-review

484 Citations (Scopus)

Abstract

Adult neurogenesis occurs throughout life in discrete regions of the adult mammalian brain. Little is known about the mechanism governing the sequential developmental process that leads to integration of new neurons from adult neural stem cells into the existing circuitry. Here, we investigated roles of Disrupted-In-Schizophrenia 1 (DISC1), a schizophrenia susceptibility gene, in adult hippocampal neurogenesis. Unexpectedly, downregulation of DISC1 leads to accelerated neuronal integration, resulting in aberrant morphological development and mispositioning of new dentate granule cells in a cell-autonomous fashion. Functionally, newborn neurons with DISC1 knockdown exhibit enhanced excitability and accelerated dendritic development and synapse formation. Furthermore, DISC1 cooperates with its binding partner NDEL1 in regulating adult neurogenesis. Taken together, our study identifies DISC1 as a key regulator that orchestrates the tempo of functional neuronal integration in the adult brain and demonstrates essential roles of a susceptibility gene for major mental illness in neuronal development, including adult neurogenesis.

Original languageEnglish
Pages (from-to)1146-1158
Number of pages13
JournalCell
Volume130
Issue number6
DOIs
Publication statusPublished - Sep 21 2007
Externally publishedYes

Keywords

  • DEVBIO
  • MOLNEURO

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

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