A module of negative feedback regulators defines growth factor signaling

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Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

Ido Amit1, Ami Citri, Tal Shay

  • 1Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel.

Nature Genetics
|February 27, 2007
PubMed

Insights

Growth factor signaling involves feedback loops. Delayed early genes attenuate signaling by regulating immediate early genes, with their downregulation linked to poor tumor outcomes.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Systems Biology

Background:

  • Cellular responses to growth factors are crucial for development and disease.
  • Signaling pathways utilize complex feedback mechanisms to ensure robust and precise cellular actions.
  • Understanding the dynamics of these pathways is key to deciphering cellular behavior.

Purpose of the Study:

  • To investigate the kinetic dynamics of growth factor signaling pathways.
  • To identify regulatory elements, specifically delayed early genes, that modulate early signaling events.
  • To elucidate the role of these genes in negative feedback regulation and their implications in cancer.

Main Methods:

  • Profiling of protein phosphorylation and gene expression to analyze signaling dynamics.
  • Utilizing epidermal growth factor receptor (EGFR) signaling as a model system.
  • Focusing on transcriptional regulation and mRNA stability mechanisms.

Main Results:

  • Identified a kinetically defined cluster of delayed early genes that attenuate growth factor signaling.
  • Demonstrated that these delayed early genes act as feedback regulators of immediate early genes.
  • Observed downregulation of these feedback genes in various tumor types, correlating with clinical outcomes.

Conclusions:

  • Delayed early genes play a critical role in the negative feedback regulation of growth factor signaling.
  • Dysregulation of these feedback mechanisms, indicated by gene downregulation, is associated with cancer progression.
  • The study proposes a mechanistic framework for understanding signaling network architecture and cellular responses.

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