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First genetic factor in prostate cancer prognosis identified
Date:4/9/2013

Patients with prostate cancer and hereditary mutations in the BRCA2 gene have a worse prognosis and lower survival rates than do the rest of the patients with the disease. This is the main conclusion to come out of a study published this week in the Journal of Clinical Oncology, in which David Olmos, Head of the Prostate Cancer and Genitourinary Tumours Clinical Research Unit at the Spanish National Cancer Research Centre (CNIO), has taken part in, along with Elena Castro, a member of the Unit, and British researchers at The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust.

According to Olmos: "Whilst the majority of patients with prostate cancer have an excellent prognosis, one of the biggest challenges we face in daily clinical practice is the difficulty of identifying those patients in which the illness can be fatal".

In order to search for genetic markers that offer clues as to the evolution of the illness, the study's authors examined 61 patients with prostate cancer who were also carriers of mutations in the BRCA2 gene (a gene that suppresses tumours and that protects DNA), 18 patients with mutations in BRCA1 (a gene whose function is similar to BRCA2) and 1,940 patients in which the presence of mutations in both genes had been excluded.

THE LARGEST STUDY TO DATE

The magnitude of the study makes it one of the largest studies carried out so far in prostate cancer patients carrying BRCA1 or BRCA2 mutations; these genes are traditionally known for being responsible for familial breast and ovarian cancer syndrome.

Patient analyses showed that BRCA1 and BRCA2 gene mutation carriers were at greater risk for having more advanced prostate cancer at the time of diagnosis, as well as of developing metastasis.

Furthermore, within the subgroup of patients in which the disease had not spread at the time of diagnosis, 23% of carriers of mutations in these genes developed metastasis o
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Contact: Nuria Noriega
comunicacion@cnio.es
Centro Nacional de Investigaciones Oncologicas (CNIO)
Source:Eurekalert

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