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EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer

  • Authors:
    • Yu Dong
    • Weihong Ren
    • Jun Qi
    • Bo Jin
    • Ying Li
    • Huiqing Tao
    • Ren Xu
    • Yanqing Li
    • Qinxian Zhang
    • Baohui Han
  • View Affiliations / Copyright

    Affiliations: Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China, Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, Henan 450000, P.R. China, Department of Thoracic Surgery, Chongqing Cancer Institute, Chongqing 400040, P.R. China, Shanghai Yuanqi Bio‑Pharmaceutical Company Ltd., Shanghai 201403, P.R. China, Department of Histology and Embryology, College of Basic Medicine, Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
    Copyright: © Dong et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2371-2378
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    Published online on: February 17, 2016
       https://doi.org/10.3892/ol.2016.4235
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Abstract

Non-small cell lung cancer (NSCLC), caused by various mutations in a spectrum of cancer driver genes, may have distinct pathological characteristics and drug responses. Extensive genetic screening and pathological characterization is required for the design of customized therapies to improve patient outcomes. Notably, NSCLC in never‑smokers exhibits distinctive clinicopathological features, which are frequently associated with tumorigenic mutations, and thus may be treated as a unique disease entity. However, to the best of our knowledge, these mutations have not been extensively and accurately characterized in an NSCLC study with a large sample size. Therefore, the present study enrolled a large cohort of NSCLC patients, which consisted of 358 never‑smokers, for the screening of genetic alterations in the epidermal growth factor receptor (EGFR), ret proto‑oncogene (RET), anaplastic lymphoma kinase (ALK), Kirsten rat sarcoma viral oncogene homolog (KRAS) and B‑Raf proto‑oncogene serine/threonine kinase (BRAF) tumorigenic genes. It was identified that the mutation rate was 47.8, 7.5, 3.6, 1.4 and 0.3% for EGFR, ALK, KRAS, RET and BRAF, respectively. In addition, clinicopathological features associated with these mutations were characterized. EGFR mutations were more frequently observed in female and older patients. By contrast, KRAS mutations were more frequently detected in male patients, and ALK and RET translocations in younger patients. The cancer cells were frequently well‑differentiated in carcinoma cases exhibiting EGFR mutations, however, were less differentiated in those with ALK translocations. In conclusion, the present study determined the frequency of oncogenic alterations and associated clinicopathological features in NSCLC exhibited by never‑smokers using a large sample size. The results of the present study may enrich our knowledge of NSCLC in never‑smokers and provide useful insights for improvement of the outcome of molecularly targeted therapies for the treatment of NSCLC.
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Copy and paste a formatted citation
Spandidos Publications style
Dong Y, Ren W, Qi J, Jin B, Li Y, Tao H, Xu R, Li Y, Zhang Q, Han B, Han B, et al: EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer. Oncol Lett 11: 2371-2378, 2016.
APA
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H. ... Han, B. (2016). EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer. Oncology Letters, 11, 2371-2378. https://doi.org/10.3892/ol.2016.4235
MLA
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H., Xu, R., Li, Y., Zhang, Q., Han, B."EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer". Oncology Letters 11.4 (2016): 2371-2378.
Chicago
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H., Xu, R., Li, Y., Zhang, Q., Han, B."EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer". Oncology Letters 11, no. 4 (2016): 2371-2378. https://doi.org/10.3892/ol.2016.4235
Copy and paste a formatted citation
x
Spandidos Publications style
Dong Y, Ren W, Qi J, Jin B, Li Y, Tao H, Xu R, Li Y, Zhang Q, Han B, Han B, et al: EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer. Oncol Lett 11: 2371-2378, 2016.
APA
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H. ... Han, B. (2016). EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer. Oncology Letters, 11, 2371-2378. https://doi.org/10.3892/ol.2016.4235
MLA
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H., Xu, R., Li, Y., Zhang, Q., Han, B."EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer". Oncology Letters 11.4 (2016): 2371-2378.
Chicago
Dong, Y., Ren, W., Qi, J., Jin, B., Li, Y., Tao, H., Xu, R., Li, Y., Zhang, Q., Han, B."EGFR, ALK, RET, KRAS and BRAF alterations in never-smokers with non-small cell lung cancer". Oncology Letters 11, no. 4 (2016): 2371-2378. https://doi.org/10.3892/ol.2016.4235
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