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Cell fate patterning during C. elegans vulval development

R J Hill1, P W Sternberg

  • 1Howard Hughes Medical Institute, Division of Biology 156-29, California Institute of Technology, Pasadena 91125.

Development (Cambridge, England). Supplement
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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Vulval development in C. elegans involves precursor cells differentiating into vulval or epidermal fates. Three signals, including an EGF-like growth factor, precisely pattern these cell fates for proper organ formation.

Area of Science:

  • Developmental Biology
  • Cell Signaling
  • Genetics

Background:

  • Vulval development in C. elegans is a model system for studying cell fate decisions.
  • Intercellular signaling pathways regulate cell differentiation during development.

Purpose of the Study:

  • To elucidate the roles of three key intercellular signals in patterning vulval precursor cell fates in C. elegans.
  • To understand how inductive, inhibitory, and lateral signals interact to determine cell fates.

Main Methods:

  • Analysis of gene mutations affecting vulval development (lin-3, lin-15, lin-12).
  • Observation of vulval precursor cell fate patterns in C. elegans.
  • Investigating the effects of inductive and lateral signaling gradients.

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Main Results:

  • The anchor cell produces an inductive signal (lin-3) that promotes vulval fates.
  • An inhibitory signal (lin-15) prevents vulval fates without induction.
  • A lateral signal (lin-12) refines the 1 degree and 2 degree vulval cell fate pattern.
  • A gradient of inductive signal and lateral signaling determine the precise 3-3-2-1-2-3 fate pattern.

Conclusions:

  • Precise vulval patterning relies on the coordinated action of inductive, inhibitory, and lateral signals.
  • The amount of inductive signal influences the number of vulval precursor cells adopting vulval fates.
  • Intercellular communication is critical for establishing complex developmental patterns.