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An important discovery in breast cancer by IRCM researchers
Date:4/15/2013

Montral, April 15, 2013 A team of researchers at the IRCM, led by Dr. Jean-Franois Ct, made an important discovery in breast cancer, which will published online this week by the scientific journal Proceedings of the National Academy of Sciences (PNAS). The Montral scientists identified the DOCK1 protein as a potential target to reduce the progression of metastases in patients suffering from breast cancer, the most common type of cancer in women.

Dr. Ct's laboratory is interested in metastasis, which is the spread of cancer from an organ (or part of an organ) to another. Nearly 90 per cent of cancer patient deaths are attributable to metastasis, thus explaining the importance of understanding the underlying cellular and molecular mechanisms of this harmful process.

"Despite important breakthroughs in breast cancer treatment, few mechanisms are known to explain the spread of metastases," says Dr. Ct, Director of the Cytoskeletal Organization and Cell Migration research unit at the IRCM. "We are looking to identify the proteins that regulate the metastatic process so that new agents can be developed and combined with current treatments."

Two major breast cancer subtypes, HER2+ and Basal, have a tendency to be metastatic and recurrent, and are ultimately associated to a poor survival rate. Research at the IRCM was conducted on the HER2+ type (Human Epidermal growth factor Receptor 2), which represents approximately 25 per cent of breast cancer cases. HER2 positive tumours tend to develop and spread more quickly than other types of tumours.

"By studying a genetic mouse model with HER2+ breast cancer, we identified the protein DOCK1 as an important regulator of metastasis," explains Mlanie Laurin, doctoral student in Dr. Ct's laboratory and first author of the study. "When we eliminated this protein in mice, our results showed a significant decrease in lung metastases. We also discovered that the DOCK1 protein contribute
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Contact: Julie Langelier
julie.langelier@ircm.qc.ca
514-987-5555
Institut de recherches cliniques de Montreal
Source:Eurekalert

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