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EGFR Protects Cancer Cells from Starving

By R&D Editors | May 5, 2008

A growth factor receptor found abundantly on the surface of cancer cells and long known to fuel cancer growth also protects tumor cells from starvation by a newly identified mechanism, researchers at The University of Texas M. D. Anderson Cancer Center report in Cancer Cell.

The epidermal growth factor receptor (EGFR) stabilizes another cell membrane protein that channels a constant supply of glucose to cancer cells, saving them from devouring themselves, a team led by Isaiah J. Fidler, D.V.M., PhD, professor and chair of M. D. Anderson’s Department of Cancer Biology, and Mien-Chie Hung, PhD, professor and chair of the department of Molecular and Cellular Oncology.

Their findings could explain why some drugs that target what was previously thought to be EGFR’s only role in cancer proliferation have had limited success in patients.  Drugs that block EGFR’s activation by growth factors – its tyrosine kinase activity – have gotten response rates in 10 percent to 20 percent of patients across a variety of cancers. 

“We show that the receptor is active independent of its kinase activity,” Fidler said. “Up until now everyone—including us—focused on kinase, kinase, kinase.”

Release date: May 5, 2008
Source: The University of Texas M.D. Anderson Cancer Center 

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