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1998 Warkany lecture: signaling pathways in development.

J Gerhart1

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, California 94720-3200, USA. gerhart@socrates.berkeley.edu

Teratology
|October 6, 1999
PubMed
Summary
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Cell-cell signaling is crucial for animal development, utilizing conserved pathways like Wnt and Notch. Studying model organisms aids understanding of mammalian development and toxicology.

Area of Science:

  • Developmental Biology
  • Evolutionary Biology
  • Cell Biology

Background:

  • Cell-cell signaling is fundamental to metazoan development, involving conserved signal transduction pathways.
  • At least 17 distinct signal transduction pathways exist, with Wnt, TGF-beta, Hedgehog, RTK, and Notch pathways prominent in early embryonic development.

Discussion:

  • These signaling pathways evolved and were conserved in pre-Cambrian times, predating the divergence of major animal phyla.
  • Cellular responses to intercellular signals, including proliferation, secretion, motility, and transcription, are conserved across metazoa and even with unicellular organisms.

Key Insights:

  • Metazoan developmental processes rely on conserved networks of signals and responses, exemplified by similarities between insects and mammals.
  • The ancient origins of protein components in these responses trace back to ancestral eukaryotes and prokaryotes.

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Outlook:

  • Model organism research, including nonvertebrates, is vital for advancing mammalian development understanding.
  • This research also provides opportunities to analyze toxicant effects on development and create sensitive toxicant assays.