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Gene signature helps identify risk of relapse in lung cancer patients
Date:4/18/2012

Lugano-CH/Aurora-US-CO/Geneva-CH, 18 April 2012 -- A new genetic signature identified by Spanish researchers may provide doctors with robust and objective information about which patients with early stage lung cancer are at low or high risk of relapse following surgery, investigators report at the 3rd European Lung Cancer Conference in Geneva. Their work also opens new avenues for immunotherapy for lung cancer.

Non-small cell lung cancer is a disease that is often not diagnosed until it has grown and spread throughout the body. Even those patients who are diagnosed early enough to undergo surgical removal of the tumor still have a discouraging 30% rate of relapse.

Researchers hope that identifying which patients have the greatest risk of relapse will allow doctors to focus other treatment strategies, in order to improve their chance of being cured after surgery.

A multidisciplinary team of researchers from Hospital Clinico San Carlos, Madrid, have found a 50-gene predictor that appears to be capable of doing just that. In a study of 84 patients with stage I and II non-small cell lung cancer, who had undergone surgery to remove their tumor, the gene signature accurately predicted which patients were at low risk of relapse.

The researchers analyzed genetic expression in the tumor mass using microarray technology. Following patients for six years, they were able to correlate gene expression patterns with the clinical course of disease, and the risk of relapse.

The Spanish research team's report at the meeting shows that the genes of the predictor were over-expressed in roughly one-third of patients, all of whom had a low risk of relapse. Further analysis showed that these genes were related to the activity of important immune system white blood cells, known as B lymphocytes.

"All of these genes overexpressed in the low-risk group are highly related to B lymphocyte activity," said Dr Florentino Hernando prese
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Contact: Vanessa Pavinato
media@esmo.org
European Society for Medical Oncology
Source:Eurekalert

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