Human-Specific NOTCH2NL Genes Expand Cortical Neurogenesis through Delta/Notch Regulation

Cell. 2018 May 31;173(6):1370-1384.e16. doi: 10.1016/j.cell.2018.03.067. Epub 2018 May 31.


The cerebral cortex underwent rapid expansion and increased complexity during recent hominid evolution. Gene duplications constitute a major evolutionary force, but their impact on human brain development remains unclear. Using tailored RNA sequencing (RNA-seq), we profiled the spatial and temporal expression of hominid-specific duplicated (HS) genes in the human fetal cortex and identified a repertoire of 35 HS genes displaying robust and dynamic patterns during cortical neurogenesis. Among them NOTCH2NL, human-specific paralogs of the NOTCH2 receptor, stood out for their ability to promote cortical progenitor maintenance. NOTCH2NL promote the clonal expansion of human cortical progenitors, ultimately leading to higher neuronal output. At the molecular level, NOTCH2NL function by activating the Notch pathway through inhibition of cis Delta/Notch interactions. Our study uncovers a large repertoire of recently evolved genes active during human corticogenesis and reveals how human-specific NOTCH paralogs may have contributed to the expansion of the human cortex.

Keywords: Notch; brain development; cerebral cortex; human evolution; neurogenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Calcium-Binding Proteins
  • Cell Differentiation / genetics
  • Cerebral Cortex / metabolism*
  • Cluster Analysis
  • Gene Expression Profiling
  • Gene Expression Regulation*
  • Gene Expression Regulation, Developmental
  • Humans
  • In Situ Hybridization
  • Intercellular Signaling Peptides and Proteins / metabolism*
  • Membrane Proteins / metabolism*
  • Neural Stem Cells / metabolism
  • Neurogenesis*
  • Neurons / metabolism*
  • Receptor, Notch2 / genetics*
  • Signal Transduction


  • Calcium-Binding Proteins
  • DLK1 protein, human
  • Intercellular Signaling Peptides and Proteins
  • Membrane Proteins
  • NOTCH2 protein, human
  • Receptor, Notch2