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Related Experiment Videos

Left-right axis malformations in man and mouse.

B Casey1, B P Hackett

  • 1Department of Pathology, Baylor College of Medicine, Texas Children's Hospital, Houston, 77030, USA. bcasey@bcm.tmc.edu

Current Opinion in Genetics & Development
|May 29, 2000
PubMed
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Understanding vertebrate left-right axis formation is advanced by studying human and mouse malformations. Key signaling pathways and genes are now better defined, aiding research into human laterality defects.

Area of Science:

  • Developmental Biology
  • Genetics
  • Human Physiology

Background:

  • Vertebrate left-right axis formation is crucial for organ positioning.
  • Malformations in humans and mice offer insights into developmental mechanisms.
  • Previous research identified several key molecular players.

Purpose of the Study:

  • To synthesize current knowledge on left-right axis determination.
  • To highlight the roles of specific signaling pathways and genes.
  • To underscore the implications for human congenital laterality defects.

Main Methods:

  • Review of existing literature on left-right axis formation in vertebrates.
  • Analysis of studies focusing on gene expression and signaling pathways.
  • Correlation of findings in model organisms (mouse) with human conditions.

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Main Results:

  • The roles of Transforming Growth Factor-beta (TGF-beta) family, Sonic hedgehog, and fibroblast growth factor signaling are clarified.
  • Homeobox genes and cilia are confirmed as critical components in axis determination.
  • A growing list of genes and environmental factors influencing laterality has been identified.

Conclusions:

  • Left-right axis formation is a complex process involving multiple genetic and environmental factors.
  • Advances in understanding these mechanisms are vital for diagnosing and potentially treating human laterality defects.
  • Further research integrating findings from model organisms and human studies is warranted.