Molecular epidemiology of EGFR and KRAS mutations in 3,026 lung adenocarcinomas: Higher susceptibility of women to smoking-related KRAS-mutant cancers Journal Article
| Authors: | Dogan, S.; Shen, R.; Ang, D. C.; Johnson, M. L.; D'Angelo, S. P.; Paik, P. K.; Brzostowski, E. B.; Riely, G. J.; Kris, M. G.; Zakowski, M. F.; Ladanyi, M. |
| Article Title: | Molecular epidemiology of EGFR and KRAS mutations in 3,026 lung adenocarcinomas: Higher susceptibility of women to smoking-related KRAS-mutant cancers |
| Abstract: | Purpose: The molecular epidemiology of most EGFR and KRAS mutations in lung cancer remains unclear. Experimental Design: We genotyped 3,026 lung adenocarcinomas for the major EGFR (exon 19 deletions and L858R) and KRAS (G12, G13) mutations and examined correlations with demographic, clinical, and smoking history data. Results: EGFR mutations were found in 43% of never smokers and in 11% of smokers. KRAS mutations occurred in 34% of smokers and in 6% of never smokers. In patients with smoking histories up to 10 packyears, EGFR predominated over KRAS. Among former smokers with lung cancer, multivariate analysis showed that, independent of pack-years, increasing smoking-free years raise the likelihood of EGFR mutation. Never smokers were more likely than smokers to have KRAS G > A transition mutation (mostly G12D; 58% vs. 20%, P = 0.0001). KRAS G12C, the most common G > T transversion mutation in smokers, was more frequent in women (P=0.007) and these women were younger thanmen with the same mutation (median 65 vs. 69, P = 0.0008) and had smoked less. Conclusions: The distinct types of KRAS mutations in smokers versus never smokers suggest that most KRAS-mutant lung cancers in never smokers are not due to second-hand smoke exposure. The higher frequency of KRAS G12C in women, their younger age, and lesser smoking history together support a heightened susceptibility to tobacco carcinogens. ©2012 AACR. |
| Journal Title: | Clinical Cancer Research |
| Volume: | 18 |
| Issue: | 22 |
| ISSN: | 1078-0432 |
| Publisher: | American Association for Cancer Research |
| Date Published: | 2012-11-15 |
| Start Page: | 6169 |
| End Page: | 6177 |
| Language: | English |
| DOI: | 10.1158/1078-0432.ccr-11-3265 |
| PROVIDER: | scopus |
| PMCID: | PMC3500422 |
| PUBMED: | 23014527 |
| DOI/URL: | |
| Notes: | --- - "Export Date: 3 December 2012" - "CODEN: CCREF" - "Source: Scopus" |
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