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Related Experiment Videos

Morphogen propagation and action: towards molecular models.

M Kerszberg1

  • 1Neurobiologie Mole@a3culaire, CNRS UA D1284, Institut Pasteur, 25, rue du Docteur Roux, Paris, Cedex 15, F-75724, France.

Seminars in Cell & Developmental Biology
|August 12, 1999
PubMed
Summary
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Mechanisms for positional signalling by morphogen transport: a theoretical study.

Journal of theoretical biology·1998

New molecular data reshapes understanding of morphogen gradients in embryos. Key mechanisms like receptor combinations and feedback loops ensure precise cell signaling and developmental outcomes.

Area of Science:

  • Developmental Biology
  • Molecular Embryology

Background:

  • Theoretical models of morphogen gradients are evolving with new molecular data.
  • Understanding how cells interpret graded morphogen concentrations is crucial for embryonic development.

Purpose of the Study:

  • To review new perspectives on morphogen gradient establishment and interpretation.
  • To analyze specific models of activin propagation and retinoic acid signaling.

Main Methods:

  • Review of theoretical views and molecular data.
  • Detailed analysis of two case studies: activin in Xenopus and retinoic acid signaling.

Main Results:

  • Emerging unifying principles include combinatorial receptor use, cooperativity, and autocatalysis.

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  • These mechanisms contribute to the specificity and reliability of cellular responses to morphogen gradients.

    • Conclusions:

    • Molecular insights are transforming the understanding of morphogen gradients.
    • Combinatorial receptor usage, cooperativity, and positive feedback are key to precise developmental signaling.