Published in the May 1 edition of Cancer Research, the study supports a critical role for IGF-1R signaling in prostate tumor development and identifies an important IGF-1R-dependent growth control mechanism, according to the authors. Title of the paper is "Conditional deletion of insulin-like growth factor-1 receptor in prostate epithelium."
"If our predictions hold true, tumor cells with intact p53 may show the best response to therapy targeting the IGF-1R signal, however when p53 is not functioning normally, response to this therapy may not be as expected," said Greenberg, the study's corresponding author and a member of the Hutchinson Center's Clinical Research Division.
Greenberg's message to clinicians who administer IGF-R1 therapy: "We're all hoping for good results but let's proceed with caution."
A search of the database for clinical trials registered with the National Cancer Institute found 18 trials in process that use therapies to inhibit IGF-R1. None of them include a tumor's p53 status as a criterion for recruiting research participants, said Greenberg.
In addition to lead author Brent Sutherland, Ph. D., of the Hutchinson Center, contributing research also came from scientists at Baylor College of Medicine in Houston, Texas, the Center for Cancer and Stem Cell Biology at Texas A&M University and the Institut National de la Sante et de la Recherche Medicale in Paris, France.
The study was funded by the National Cancer Institute, the Prostate Cancer Foundation and Phi Beta Psi.
Note to reporters/editors: To obtain a copy of the study, please contact Dean Forbes, 206-667-2896 or firstname.lastname@example.org
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