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A common nuclear signal transduction pathway activated by growth factor and cytokine receptors

H B Sadowski1, K Shuai, J E Darnell

  • 1Cold Spring Harbor Laboratory, NY 11724.

Science (New York, N.Y.)
|September 24, 1993
PubMed

Insights

Different cell receptors, like epidermal growth factor (EGF) and interleukins, can trigger common gene pathways. This allows cells to respond to various signals by selectively activating specific transcription factors.

Area of Science:

  • Cellular biology
  • Molecular signaling
  • Gene regulation

Background:

  • Cell surface receptors mediate diverse cellular responses to external stimuli like growth factors and cytokines.
  • Receptors with distinct biochemical properties can induce similar or unique biological outcomes, indicating shared downstream signaling mechanisms.

Discussion:

  • Unrelated receptors converge on common nuclear signal transduction pathways.
  • Latent cytoplasmic transcription factors are differentially activated by various ligands.
  • These factors exhibit distinct DNA-binding specificities, enabling precise gene regulation.

Key Insights:

  • Direct tyrosine phosphorylation is a key mechanism linking receptor activation to transcription factor activity.
  • Ligand-specific patterns of transcription factor activation allow for fine-tuning of cellular responses.
  • A common signaling pathway can regulate both shared and unique gene sets based on the activated factors.

Outlook:

  • Understanding these convergent signaling pathways can reveal new therapeutic targets for diseases involving aberrant cell signaling.
  • Further research into the combinatorial control of transcription factors by different receptors may uncover novel mechanisms of cellular plasticity.

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