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Lung tumors in never-smokers show greater genomic instability than those in smokers
Date:7/5/2011

m never smokers to identify genetic (DNA level) alterations specific to one group or the other. The genetic alterations specific to the never smoker group may have important roles in driving the development of lung cancer in never smokers."

In the study, researchers extracted DNA from lung adenocarcinomas and matched non-malignant tissues for 30 never smokers, 14 former smokers and 39 current smokers. The DNA was assessed for EGFR and KRAS mutations. Copy number profiles were generated for each tumor using matched non-malignant lung tissue as a baseline for the identification of somatic copy number alterations. Two independent, publicly available datasets composed of lung adenocarcinomas from never smokers and smokers were used as validation datasets.

On average, never smokers' lung tumors showed higher frequencies of copy number alterations and greater proportions of altered genomes compared with those of smokers. This difference was more pronounced when former smokers were excluded and never smokers were compared with current smokers only.


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Contact: Rene McGaw
renee.mcgaw@ucdenver.edu
31-205-493-413
International Association for the Study of Lung Cancer
Source:Eurekalert

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