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The twisted pharynx phenotype in C. elegans.

Claes Axäng1, Manish Rauthan, David H Hall

  • 1Dept. of Chemical and Biological Engineering, Lundberg Laboratory, Chalmers University, Göteborg, Sweden. claes.axang@molbiotech.chalmers.se <claes.axang@molbiotech.chalmers.se>

BMC Developmental Biology
|June 2, 2007
PubMed
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The C. elegans pharynx develops a twist due to defects in cytoskeleton or attachment points. This twisting phenotype offers insights into organ development and gene function.

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • The C. elegans pharynx, an epithelial tube, serves as a model for organ development, comparable to embryonic heart and kidney.
  • Previous reports noted a twisted pharynx phenotype in C. elegans mutants, but detailed studies were lacking.

Purpose of the Study:

  • To investigate the nature of the twisted pharynx phenotype in C. elegans mutants.
  • To identify genes involved in pharyngeal development and organogenesis.

Main Methods:

  • Detailed examination of twisting mutants (dig-1, mig-4, mnm-4, unc-61).
  • Analysis of pharyngeal ultrastructure and actin filament organization.
  • Screening of adhesion-molecule mutants for the twisted pharynx phenotype.

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Main Results:

  • The twisting phenotype exacerbates during larval development and persists in dissected pharynges.
  • Double mutants with thickened pharyngeal domains showed reduced twisting.
  • Pharyngeal tendinous organs and actin filaments exhibited spiral orientation in twisted pharynges.

Conclusions:

  • Pharyngeal twisting may result from defects in cytoskeleton length or extracellular matrix attachment.
  • The twisted pharynx phenotype is a valuable marker for genes involved in extracellular adhesion, organ attachment, and cytoskeleton regulation.