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Related Experiment Videos

Left-right asymmetry in vertebrate development.

M L López-Gracia1, M A Ros

  • 1Departamento de Anatomía y Biología Celular, Faculdad de Medicina, Universidad de Cantabria, Santander, Spain. rosm@unican.es

Advances in Anatomy, Embryology, and Cell Biology
|January 11, 2007
PubMed
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Vertebrate organ arrangement is asymmetrical, established by nodal cilia and gene pathways. Understanding these mechanisms is key to revealing the genetic basis of human laterality defects.

Area of Science:

  • Developmental Biology
  • Genetics
  • Human Anatomy

Background:

  • Vertebrate body plan exhibits external bilateral symmetry.
  • Internal visceral organ distribution is notably asymmetrical.
  • Recent advances have illuminated the mechanisms of internal asymmetry.

Purpose of the Study:

  • To summarize recent advances in understanding vertebrate internal asymmetry.
  • To highlight the role of nodal cilia and gene pathways in left-right patterning.
  • To explore the genetic basis of human laterality defects.

Main Methods:

  • Review of developmental models.
  • Analysis of genetic studies on left-right patterning.
  • Investigation of nodal cilia activity.

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Main Results:

  • Nodal cilia activity is a key mechanism for establishing asymmetry.
  • Numerous genes are involved in the left-right patterning pathway.
  • Progress is being made in linking genetic pathways to human laterality defects.

Conclusions:

  • Significant progress has been made in understanding internal asymmetry.
  • The genetic basis of human laterality defects is beginning to be understood.
  • Further research is needed to elucidate gene interactions in left-right development.