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A Common Signaling Cascade May Underlie "addiction" to the Src, BCR-ABL, and EGF Receptor Oncogenes

Overview
Journal Cancer Cell
Publisher Cell Press
Specialty Oncology
Date 2006 Nov 14
PMID 17097564
Citations 111
Authors
Affiliations
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Abstract

"Oncogene addiction" describes an unexplained dependency of cancer cells on a particular cellular pathway for survival or proliferation. We report that differential attenuation rates of prosurvival and proapoptotic signals in oncogene-dependent cells contribute to cell death following oncogene inactivation. Src-, BCR-ABL-, and EGF receptor-dependent cells exhibit a similar profile of signal attenuation following oncogene inactivation characterized by rapid diminution of phospho-ERK, -Akt, and -STAT3/5, and a delayed accumulation of the proapoptotic effector phospho-p38 MAPK. These findings implicate a transient imbalance in survival and apoptotic oncogenic outputs in the apoptotic response to oncogene inactivation. Moreover, these observations implicate a common profile of signal attenuation for multiple oncogenes and suggest that "addiction" associated with apoptosis reflects an active rather than a passive process.

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