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Related Experiment Videos

Mutations affecting embryonic cell migrations in Caenorhabditis elegans.

J Manser1, W B Wood

  • 1Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder.

Developmental Genetics
|January 1, 1990
PubMed
Summary

Four new mutations affecting embryonic cell migration in C. elegans were identified. These mutations disrupt the directed movement of canal-associated neurons (CANs) and other cells, revealing new genes involved in cell migration control.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • Embryonic cell migration is crucial for organism development.
  • Understanding the genetic control of directed cell movement is essential for developmental biology.
  • The nematode C. elegans serves as a powerful model organism for studying conserved cellular processes like migration.

Purpose of the Study:

  • To identify and characterize genes involved in the long-range embryonic migration of canal-associated neurons (CANs) in C. elegans.
  • To isolate new mutations affecting directed cell movement.
  • To understand the genetic basis of neuronal migration defects.

Main Methods:

  • Isolation and characterization of recessive mutations affecting CAN migration.
  • Genetic complementation tests to assign mutations to loci.

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  • Nomarski microscopy to analyze cell migration phenotypes.
  • Analysis of mutations affecting other cell types, including neurons, mesoblasts, and coelomocyte precursors.

    • Main Results:

    • Four recessive mutations affecting CAN migration were identified and assigned to four loci: mig-10, mig-11, unc-39, and vab-8.
    • Mutations at these loci caused abnormal migration of CANs with high to moderate penetrance.
    • Other cell types, including ALM and HSN neurons, mesoblast M, and coelomocyte mother cells, were also affected by these mutations, generally with lower penetrance.
    • Genetic tests indicated that the affected migrations are largely independent of one another.

    Conclusions:

    • The identified genes (mig-10, mig-11, unc-39, vab-8) play significant roles in controlling embryonic cell migration in C. elegans.
    • These mutations provide tools for further investigation into the molecular mechanisms of directed cell movement.
    • The study highlights the complexity of cellular migration pathways and potential genetic redundancies or interdependencies.