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Updated: Feb 20, 2026

The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
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Platelet-activating factor modulates apoptotic gene expression in developing sea urchin embryos.

Shohom Saha1, Aaron Cho1, Caroline Smith1

  • 1Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC, United States.

Frontiers in Cell and Developmental Biology
|February 19, 2026
PubMed
Summary
This summary is machine-generated.

Platelet-Activating Factor (PAF) influences early sea urchin development by altering apoptotic gene expression. PAF increases both pro-apoptotic and anti-apoptotic gene expression, revealing complex regulation during embryogenesis.

Keywords:
apoptosiscaspaseplatelet-activating factorsea urchinssignaling / signaling pathways

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Early embryonic development requires precise gene expression regulation.
  • Sea urchin embryos are a valuable model for studying embryogenesis due to accessibility and reproducibility.
  • The role of growth factors like Platelet-Activating Factor (PAF) in regulating apoptotic gene expression during early embryogenesis is largely unknown.

Purpose of the Study:

  • To investigate the role of Platelet-Activating Factor (PAF) in regulating apoptotic gene expression in early sea urchin embryos.
  • To analyze the expression patterns of key pro-apoptotic and anti-apoptotic genes following PAF treatment.

Main Methods:

  • Utilized *Lytechinus variegatus* sea urchin embryos.
  • Employed quantitative real-time polymerase chain reaction (qRT-PCR) to analyze gene expression.
  • Collected samples at 20-minute intervals for up to 240 minutes post-fertilization.

Main Results:

  • PAF treatment led to increased expression of pro-apoptotic caspase genes (CASP3, CASP7, CASP8) at all measured time points.
  • PAF also induced a biphasic increase in the expression of anti-apoptotic genes (BCL2A1, NFKBIA, NFKBIZ).

Conclusions:

  • Platelet-Activating Factor (PAF) plays a significant role in modulating apoptotic gene expression during early sea urchin development.
  • Complex regulatory mechanisms are in place to balance apoptotic machinery function and prevent excessive cell death in early embryogenesis.