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Related Experiment Videos

LIN-12 protein expression and localization during vulval development in C. elegans

D Levitan1, I Greenwald

  • 1Department of Biochemistry and Molecular Biophysics, Howard Hughes Medical Institute, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.

Development (Cambridge, England)
|July 22, 1998
PubMed
Summary

Researchers visualized LIN-12::GFP protein to study cell fate in C. elegans vulval development. LIN-12::GFP levels reflect lin-12 transcription in gonad development but not always in vulval precursor cells, suggesting post-transcriptional regulation.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • Cell fate determination is crucial for organism development.
  • LIN-12, a transmembrane receptor, plays a key role in cell-cell communication and fate decisions.
  • Understanding LIN-12 dynamics is essential for deciphering developmental processes.

Purpose of the Study:

  • To investigate LIN-12 protein accumulation during cell fate decisions in C. elegans vulval development.
  • To analyze the relationship between LIN-12::GFP expression and lin-12 transcription in different developmental contexts.
  • To explore the role of LIN-12 regulation in establishing invariant cell fates.

Main Methods:

  • Utilized a LIN-12::GFP fusion protein to visualize LIN-12 protein levels.
  • Observed LIN-12::GFP accumulation during the anchor cell/ventral uterine precursor cell (AC/VU) decision in the somatic gonad.

Related Experiment Videos

  • Examined LIN-12::GFP dynamics in vulval precursor cells (VPCs) and their lineages during vulval development.

    • Main Results:

    • In the AC/VU decision, LIN-12::GFP accumulation mirrored lin-12 transcription, decreasing in the presumptive AC and increasing in the presumptive VU.
    • In VPCs, LIN-12::GFP initially showed uniform expression but was reduced in P6.p, independent of lin-12 transcription.
    • This reduction in P6.p was linked to Ras pathway activation triggered by an EGF-like signal from the AC.

    Conclusions:

    • LIN-12::GFP accumulation accurately reflects lin-12 transcription in the gonad AC/VU decision, mediated by a feedback mechanism.
    • In VPCs, LIN-12::GFP levels are dynamically regulated post-transcriptionally, suggesting post-transcriptional mechanisms fine-tune cell fate.
    • Downregulation of LIN-12 stability or translation in response to inductive signals contributes to the precise and invariant VPC fate patterning.