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Detection of cell-free nucleic acids in bronchial lavage fluid supernatants from patients with lung cancer

Item Type:Article
Title:Detection of cell-free nucleic acids in bronchial lavage fluid supernatants from patients with lung cancer
Creators Name:Schmidt, B. and Carstensen, T. and Engel, E. and Jandrig, B. and Witt, C. and Fleischhacker, M.
Abstract:The aim of this study was to determine whether nucleic acids are detectable in cell-free bronchial lavage supernatants, and whether it is possible to find alterations in this DNA and RNA of genes known to be present in lung tumour cells. DNA was isolated from cell-free lavage supernatants from 30 and RNA from 25 lung cancer patients. The DNA was examined for microsatellite alterations (MA) and the RNA analysed for the expression of seven tumour-associated genes. Intact DNA and mRNA could be isolated from all cell-free bronchial lavage supernatants. MA were found in lavage supernatants of 12/30 patients and in lavage cells of 6/30 patients. Altogether alterations were found in 14/30 patients. Analyses of tumour-associated gene expression showed positive results, with at least one marker in the lavage supernatants of all 25 patients. Thus, we could demonstrate, for the first time, that it is possible to isolate intact DNA and RNA from cell-free bronchial lavage supernatants. Their quantity and quality is sufficient for further amplification by polymerase chain reaction (PCR)/reverse transcriptase (RT)-PCR. Altogether, tumour-associated changes were detected in DNA samples from 47% of the patients and in RNA samples from all of the patients analysed.
Keywords:Bronchial Lavage, DNA/RNA Isolation, Early detection, Free nucleic acids, Lung cancer
Source:European Journal of Cancer
Publisher:Pergamon Press
Page Range:452-460
Date:February 2004
Official Publication:https://doi.org/10.1016/j.ejca.2003.10.020
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