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Finding the Achilles' Heel of ovarian tumor growth
Date:6/19/2014

A team of scientists, led by principal investigator David D. Schlaepfer, PhD, professor in the Department of Reproductive Medicine at the University of California, San Diego School of Medicine report that small molecule inhibitors to a protein called focal adhesion kinase (FAK) selectively prevent the growth of ovarian cancer cells as tumor spheroids.

The findings come in a pair of studies published online this week in the journals Gynecologic Oncology and Molecular Cancer Therapeutics.

Ovarian cancer is a leading cause of female cancer death in the United States. On average, more than 21,000 women are diagnosed with ovarian cancer each year and 14,270 die. Many women achieve remission, but cancer recurrence rates exceed 75 percent, prompting the need for new treatments.

"Ovarian cancer spreads within a women's peritoneal space through a unique mechanism that involves the survival of small clusters of tumor cells termed spheroids," said Schlaepfer. "Our studies show that FAK signaling functions at the center of a tumor cell survival signaling network."

In the first study, published in Gynecologic Oncology, first author Nina Shah, MD, a gynecological oncology fellow in the Department of Reproductive Medicine, found that ovarian tumor cells with low levels of a tumor suppressor protein, called merlin, displayed heightened sensitivity to FAK inhibitor growth cessation.

"With FAK inhibitor clinical trials already testing a similar linkage in mesothelioma (a rare cancer that affects the protective lining of many internal organs), our results support the hypothesis that protein biomarkers such as merlin may identify those patients who may best respond to FAK inhibitor therapy," said Schlaepfer.

In the second study in Molecular Cancer Therapeutics, first author Isabelle Tancioni PhD, an assistant project scientist at UC San Diego Moores Cancer Center discovered that a network of signals generated by
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Contact: Scott LaFee
slafee@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert  

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Finding the Achilles' Heel of ovarian tumor growth
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