Epidermal growth factor receptor induced apoptosis: Potentiation by inhibition of Ras signaling Academic Article Article uri icon

Overview

MeSH Major

  • Adaptation, Physiological
  • Hypoxia
  • Nerve Degeneration
  • Nervous System

abstract

  • Previous studies have shown that certain tumor cell lines which naturally express high levels of the epidermal growth factor receptor (EGFR) undergo apoptosis when exposed to epidermal growth factor. Whether this phenomenon is a direct result of receptor overexpression or some other genetic alteration renders these cells sensitive to apoptosis is yet to be established. We show that experimentally increasing the level of EGFR expression predictably leads to apoptosis in a variety of cell types which requires an active tyrosine kinase but not EGFR autophosphorylation sites. Expression of a dominant negative Ras mutant in EGFR overexpressing cells results in a significant potentiation of EGFR induced apoptosis suggesting that Ras activation is a key survival signal generated by the EGFR. We propose that potentiation of EGFR induced apoptosis by dominant negative Ras results, at least in part, by a block of Akt activation.

publication date

  • February 23, 2001

Research

keywords

  • Academic Article

Identity

Digital Object Identifier (DOI)

  • 10.1016/S0014-5793(01)02166-4

PubMed ID

  • 11226409

Additional Document Info

start page

  • 9

end page

  • 15

volume

  • 491

number

  • 1-2