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Inhibiting prostate cancer without disturbing regular body processes
Date:8/9/2010

This release is available in French.

Inhibiting prostate cancer without disturbing regular body processes Researchers explain how a facultative enzyme governs tumour growth

A kinase is a type of enzyme the body uses to regulate the functions of the proteins required for cell growth and maintenance, and researchers have discovered that one in particular plays a key role in developing prostate cancer. "It's known as Mnk, and although it appears not to be essential for normal cell maintenance, it's important for cancer growth" said Dr. Luc Furic, a postdoctoral researcher working with Dr. Nahum Sonenberg at McGill University's Goodman Cancer Research Centre and Department of Biochemistry.

This is a very significant finding because the body's chemical processes are highly complex and interrelated, meaning that targeting one cause of cancer often involves affecting the body's normal functions. An important part of cancer research is about trying to find processes that can be inhibited or stopped without causing damages to normal tissue.

The chemical process Mnk uses is known as phosphorylation, and this process activates or inactivates the body's proteins, controlling mechanisms that can cause disease. In this case, Mnk works with a protein known as eIF4E to synthesize proteins in the cell.

Researchers at the Centre hospitalier de l'Universit de Montral Research Centre (CRCHUM), Universit de Montral and McGill University engineered mice that were able to block the phosphorylation process of this protein, and discovered that these mice became resistant to prostate cancer growth. "The PTEN gene and its protein act as a tumour suppressor," explained Dr. Fred Saad, researcher at the CRCHUM and at Universit de Montral's Department of Surgery. "By removing this gene in the mouse prostate, we were able to study eIF4E's effect on cell gro
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Contact: William Raillant-Clark
william.raillant-clark@mcgill.ca
514-398-2189
McGill University
Source:Eurekalert

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