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An epigenetic classifier for early stage lung cancer.


ABSTRACT: Background:Methylated genes detected in sputum are promise biomarkers for lung cancer. Yet the current PCR technologies for quantification of DNA methylation and diagnostic value of the sputum biomarkers are not sufficient to be used for lung cancer early detection. The emerging droplet digital PCR (ddPCR) is a straightforward means for precise, direct, and absolute quantification of nucleic acids. Here, we investigate whether ddPCR can sensitively and robustly quantify DNA methylation in sputum for more precise diagnosis of lung cancer. Results:First, the analytic performance of methylation-specific ddPCR (ddMSP) and quantitative methylation-specific PCR (qMSP) is determined in methylated and unmethylated DNA samples. Second, 29 genes, previously proposed as potential sputum biomarkers for lung cancer, are analyzed by using ddMSP in a training set of 127 lung cancer patients and 159 controls. ddMSP has higher sensitivity, precision, and reproducibility for quantification of methylation compared with qMSP (all p??0.05). The classifier has higher accuracy compared with sputum cytology (88.8 vs. 70.6%, p?

SUBMITTER: Su Y 

PROVIDER: S-EPMC5964676 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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An epigenetic classifier for early stage lung cancer.

Su Yun Y   Fang Hong Bin HB   Jiang Feng F  

Clinical epigenetics 20180522


<h4>Background</h4>Methylated genes detected in sputum are promise biomarkers for lung cancer. Yet the current PCR technologies for quantification of DNA methylation and diagnostic value of the sputum biomarkers are not sufficient to be used for lung cancer early detection. The emerging droplet digital PCR (ddPCR) is a straightforward means for precise, direct, and absolute quantification of nucleic acids. Here, we investigate whether ddPCR can sensitively and robustly quantify DNA methylation i  ...[more]

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