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Left-right development from embryos to brains

H J Yost1

  • 1Huntsman Cancer Institute, Center for Children, University of Utah, Salt Lake City 84112-5330, USA.

Developmental Genetics
|December 8, 1998
PubMed
Summary
This summary is machine-generated.

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This study explores the origins and genetic pathways of left-right asymmetry in bilaterian animals, focusing on organ development and brain function. It addresses how this asymmetry is established and maintained relative to other body axes.

Area of Science:

  • Developmental Biology
  • Comparative Anatomy
  • Genetics

Background:

  • Bilateran animals exhibit external bilateral symmetry (dorsoventral/anteroposterior axes) and internal left-right asymmetries.
  • Left-right development is crucial for organogenesis, including cardiac looping, gut coiling, and organ positioning (liver, stomach, etc.).
  • Brain morphology and function also display left-right asymmetries in vertebrates.

Purpose of the Study:

  • Investigate the origins and conservation of the left-right (LR) axis in metazoans.
  • Elucidate the genetic pathways governing LR development after initial symmetry breaking.
  • Understand the cellular and tissue mechanics driving asymmetric morphogenesis.
  • Determine if LR asymmetry in different organ systems originates from a common event or separate mechanisms.

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Main Methods:

  • Review of experimental findings and recent literature on LR development.
  • Analysis of genetic pathways and molecular mechanisms.
  • Examination of cellular and tissue dynamics in morphogenesis.
  • Comparative studies across metazoans.

Main Results:

  • The origins and conservation of the LR axis are fundamental questions being experimentally addressed.
  • Genetic pathways and cellular mechanics are key to perpetuating LR development.
  • The relationship between LR axis establishment and organ-specific asymmetry is under investigation.
  • This issue contributes to the burgeoning field of left-right development.

Conclusions:

  • Understanding the genetic and mechanical basis of LR asymmetry is critical for developmental biology.
  • Further research is needed to integrate findings across organ systems and metazoan evolution.
  • This work highlights the complexity and conserved nature of LR axis determination.