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Hope in stopping melanoma from spreading: Inhibiting protein prevents metastasis to lungs in mice
Date:3/5/2013

SALT LAKE CITY Researchers have identified a critical protein role in the metastasis of melanoma, the most serious form of skin cancer. Inhibition of the protein known as adenosine diphosphate ribosylation factor 6 (ARF6) reduces the spread of melanoma to the lungs in mice, according to a study published in the March 5 issue of Science Signaling online, suggesting that targeting ARF6 may be an effective approach to preventing melanoma metastasis.

Melanoma is the sixth most common cancer in the United States. Approximately one in 50 people will develop melanoma in their lifetime, and the number of melanoma cases diagnosed each year is increasing faster than for any other cancer. While melanoma generally starts as a single skin tumor, cancer cells can spread, or metastasize, to distant sites throughout the body such as the liver, lungs, and brain.

"Metastasis is what makes melanoma lethal, but our knowledge of how melanoma spreads is limited," says Allie Grossmann, M.D., Ph.D., molecular genetic pathology fellow at the University of Utah and co-first author on the study. "By improving our understanding of the cellular machinery responsible for melanoma metastasis, we can better identify targeted therapies that may stop the spread of cancer cells."

Although significant progress has been made in the treatment of metastatic melanoma, currently available treatments still can't achieve long-term survivorship in most patients. Grossmann and her colleagues discovered a new molecular pathway involving ARF6 that promotes metastasis and can be inhibited by a small molecule known as SecinH3.

"The surprising discovery that SecinH3 seems to inhibit the entire metastatic signaling cascade represents a potential breakthrough that may lead to improvements in the efficacy of current drug therapy. Our findings are exciting because the clinical implications extend beyond melanoma to other cancers, such as breast cancer and a type of brai
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Contact: Phil Sahm
phil.sahm@hsc.utah.edu
801-581-2517
University of Utah Health Sciences
Source:Eurekalert

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