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Article

Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance

  • Authors:
    • Jianjiao Ni
    • Linqian Weng
    • Yi Liu
    • Zhao Sun
    • Chunmei Bai
    • Yingyi Wang
  • View Affiliations / Copyright

    Affiliations: Department of Medical Oncology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, P.R. China, Translational Medicine Center, Laboratory of Oncology, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China
  • Pages: 4549-4557
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    Published online on: April 11, 2017
       https://doi.org/10.3892/ol.2017.6022
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Abstract

Detecting genetic mutations in circulating cell-free DNA (cfDNA) is a promising approach of liquid biopsy. Between June 2014 and May 2015, 168 plasma samples were collected monthly from 20 patients with metastatic lung adenocarcinoma with epidermal growth factor receptor (EGFR) mutation receiving gefitinib therapy. Clinically relevant EGFR mutations, including exon 19 deletion, L858R and T790M, were quantified using droplet digital polymerase chain reaction. In baseline samples, 19 (95.0%) patients had the same mutation with the matched tumors, and pretreatment T790M mutations were also detected in 3 (15.0%) patients. The dynamics of EGFR mutations were generally associated with treatment response for patients with or without measurable disease. For patients with immeasurable tumor deposits, monitoring disease evolution using cfDNA‑based mutation quantification appeared to be more reliable compared with measuring the diameters of target tumor lesions. In addition, molecular progressive disease, defined as a ≥20% increase of EGFR mutation concentration compared with the lowest concentration recorded during treatment, was tracked up to 8 months prior to objective progression. In survival analysis, sex (P=0.005), pretreatment T790M mutation status (P=0.006), T790M mutation status at the disease progression (P=0.043) and growth rate of EGFR mutations (P=0.023), had a significant impact on median progression‑free survival. In conclusion, dynamic monitoring of EGFR mutations in cfDNA is feasible and appears to be useful in early prediction of drug resistance for patients with lung cancer receiving EGFR tyrosine kinase inhibitors.
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Copy and paste a formatted citation
Spandidos Publications style
Ni J, Weng L, Liu Y, Sun Z, Bai C and Wang Y: Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance. Oncol Lett 13: 4549-4557, 2017.
APA
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., & Wang, Y. (2017). Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance. Oncology Letters, 13, 4549-4557. https://doi.org/10.3892/ol.2017.6022
MLA
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., Wang, Y."Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance". Oncology Letters 13.6 (2017): 4549-4557.
Chicago
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., Wang, Y."Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance". Oncology Letters 13, no. 6 (2017): 4549-4557. https://doi.org/10.3892/ol.2017.6022
Copy and paste a formatted citation
x
Spandidos Publications style
Ni J, Weng L, Liu Y, Sun Z, Bai C and Wang Y: Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance. Oncol Lett 13: 4549-4557, 2017.
APA
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., & Wang, Y. (2017). Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance. Oncology Letters, 13, 4549-4557. https://doi.org/10.3892/ol.2017.6022
MLA
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., Wang, Y."Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance". Oncology Letters 13.6 (2017): 4549-4557.
Chicago
Ni, J., Weng, L., Liu, Y., Sun, Z., Bai, C., Wang, Y."Dynamic monitoring of EGFR mutations in circulating cell-free DNA for EGFR-mutant metastatic patients with lung cancer: Early detection of drug resistance and prognostic significance". Oncology Letters 13, no. 6 (2017): 4549-4557. https://doi.org/10.3892/ol.2017.6022
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