Screening for activating EGFR mutations in surgically resected nonsmall cell lung cancer

Abstract

The clinical applicability of screening surgically resected nonsmall cell lung cancer (NSCLC) tumour tissue and serum for activating epidermal growth factor receptor (EGFR) mutation is unknown. Furthermore, the comparative accuracy of inexpensive EGFR mutation tests, mutant-enriched (ME)-PCR and high-resolution melt (HRM) has not been determined.Lung tumour DNA from 522 surgically resected stage I-IV NSCLC and matched serum DNA from a subset of 64 subjects was analysed for EGFR mutations in exons 19 and 21 using ME-PCR and HRM. Additionally, 97 subjects had previous EGFR DNA sequencing data available for comparison.ME-PCR and HRM detected EGFR mutations in 5% (27 out of 522) of tumour samples. Compared to DNA sequencing, ME-PCR had a sensitivity of 100% and specificity of 99%, while HRM had 100% sensitivity and specificity. Six subjects with EGFR mutation tumours had matched serum, where ME-PCR detected mutations in three samples and HRM in two samples. In the cohort of never-smoker subjects, those with EGFR mutated tumours had worse survival compared with wild-type tumours (30 versus 49 months; p50.017).ME-PCR and HRM have similar accuracy in detecting EGFR mutations but the prognostic implications of the mutations in resected NSCLC warrants further study.

Reduced biological effect of e-cigarette aerosol compared to cigarette smoke evaluated in vitro using normalized nicotine dose and RNA-seq-based toxicogenomics

“…Changes in those processes are in good agreement with numerous studies on cigarette smoke toxicity conducted in vitro and in vivo and models of tobacco-related lung diseases including cancer and COPD 32–34 . The low p-values obtained for the GO enrichment indicate that the over-represented categories are not due to chance and are based on a substantial number of gene hits (Fig.…”

Reduced biological effect of e-cigarette aerosol compared to cigarette smoke evaluated in vitro using normalized nicotine dose and RNA-seq-based toxicogenomics

“…Changes in those processes are in good agreement with numerous studies on cigarette smoke toxicity conducted in vitro and in vivo and models of tobacco-related lung diseases including cancer and COPD [32][33][34] . The low p-values obtained for the GO enrichment indicate that the over-represented categories are not due to chance and are based on a substantial number of gene hits (Fig.…”

Can EGFR mutations in plasma or serum be predictive markers of non-small-cell lung cancer? A meta-analysis

“…Except for one study with a particularly high specificity that contained 30 respectively. All values were minimally changed in comparison with those in test performance above-mentioned.…”