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Hox Genes and the Hindbrain: A Study in Segments.

Robb Krumlauf1

  • 1Stowers Institute for Medical Research, Kansas City, Missouri, USA; Department of Anatomy & Cell Biology, Kansas University Medical School, Kansas City, Kansas, USA.

Current Topics in Developmental Biology
|March 13, 2016
PubMed
Summary

Hindbrain segmentation relies on Hox gene expression for diverse neural and craniofacial development. This fundamental process is controlled by a conserved gene network present throughout vertebrate evolution.

Keywords:
Axial patterningGene regulationHindbrain segmentationHomeobox genesHox genesNeural developmentPatterning and regulatory networksVertebrate evolution

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Area of Science:

  • Developmental Biology
  • Neuroscience
  • Genetics

Background:

  • The hindbrain undergoes segmentation, a crucial process for vertebrate head development.
  • This segmentation is tightly linked to the spatial and temporal expression of Hox genes.
  • Hox genes are essential for establishing regional identity in neural and craniofacial structures.

Purpose of the Study:

  • To elucidate the role of Hox gene expression in hindbrain segmentation.
  • To understand how this process generates regional diversity in neural and craniofacial derivatives.
  • To investigate the evolutionary conservation of the underlying gene regulatory network.

Main Methods:

  • Analysis of Hox gene expression patterns during hindbrain development.
  • Investigating the genetic interactions within the regulatory network governing segmentation.
  • Comparative studies across different vertebrate species to assess evolutionary conservation.

Main Results:

  • Demonstrated a direct correlation between ordered Hox gene expression and hindbrain segmentation.
  • Identified specific Hox genes critical for specifying distinct hindbrain-derived neural and craniofacial elements.
  • Confirmed the conservation of this Hox gene-driven segmentation mechanism across vertebrates.

Conclusions:

  • Hindbrain segmentation is a fundamental developmental process orchestrated by Hox genes.
  • The precise regulation of Hox genes ensures the correct regionalization of neural and craniofacial structures.
  • The conserved gene regulatory network highlights the ancient origins of vertebrate head development.