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Control of EGF receptor signaling by clathrin-mediated endocytosis

A V Vieira1, C Lamaze, S L Schmid

  • 1Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. slschmid@scripps.edu

Science (New York, N.Y.)
|December 20, 1996
PubMed

Insights

Endocytic trafficking of epidermal growth factor receptor (EGFR) is crucial. It regulates EGFR signaling attenuation and pathway control, impacting cell proliferation.

Area of Science:

  • Cell biology
  • Molecular signaling
  • Receptor trafficking

Background:

  • Epidermal growth factor receptor (EGFR) signaling is vital for cell growth.
  • Receptor-mediated endocytosis regulates EGFR signaling.
  • The precise role of endocytosis in EGFR signaling dynamics is not fully understood.

Purpose of the Study:

  • To investigate the role of endocytic trafficking in EGFR signaling.
  • To determine how defects in endocytosis affect EGFR-mediated cell proliferation and signaling.
  • To elucidate the mechanisms by which EGFR trafficking controls signal transduction.

Main Methods:

  • Analysis of EGFR signaling in mammalian cells with conditional defects in endocytosis.
  • Assessment of EGF-dependent cell proliferation.
  • Evaluation of early EGF-dependent signaling events and signal transducer activation.

Main Results:

  • Enhanced EGF-dependent cell proliferation was observed in endocytosis-defective cells.
  • Early EGFR signaling events were not uniformly upregulated.
  • Specific signal transducers required normal EGFR endocytic trafficking for full activation.

Conclusions:

  • Endocytic trafficking of activated EGFR is critical for attenuating signaling.
  • EGFR trafficking plays a key role in establishing and controlling specific signaling pathways.
  • Defective endocytosis alters EGFR signaling outcomes, affecting cell proliferation and signal transduction.

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