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Body's left side.

C Kioussi1, M G Rosenfeld

  • 1Howard Hughes Medical Institute, Cellular and Molecular Medicine, University of California San Diego, School and Department of Medicine, La Jolla 92093-0648, USA. ckioussi@ucsd.edu

Cellular and Molecular Biology (Noisy-Le-Grand, France)
|October 8, 1999
PubMed
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Left-right organ asymmetry arises from signaling cascades involving genetic factors and transcription factors. Mechanisms regulating cell migration and proliferation differ between organs like the lungs and heart.

Area of Science:

  • Developmental biology
  • Genetics
  • Cell signaling

Background:

  • Left-right organ asymmetry is crucial for vertebrate development.
  • The precise initiating event remains elusive, but signaling pathways are implicated.
  • Understanding asymmetry mechanisms is key to developmental processes.

Purpose of the Study:

  • To outline the molecular and cellular events underlying left-right organ asymmetry.
  • To explore the roles of signaling molecules and transcription factors.
  • To differentiate mechanisms of asymmetry in various organs.

Main Methods:

  • Review of existing literature on developmental signaling pathways.
  • Analysis of genetic factors influencing organogenesis.
  • Comparative study of pulmonary and cardiac asymmetry.

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Main Results:

  • Organ asymmetry involves genetically defined signaling molecules and transcription factors.
  • Cell migration and proliferation are key regulated events.
  • Mechanisms can be distinct for different organs, e.g., pulmonary vs. cardiac.

Conclusions:

  • A framework for understanding organ asymmetry can be deduced from current knowledge.
  • Further research is needed to fully define the precise genetic mechanisms.
  • Signaling cascades and cellular behaviors are central to establishing asymmetry.