Cited by 216Lung Cancer Treatments and MutationsCancer Genomics and DiagnosticsHER2/EGFR in Cancer Research

Ultra-sensitive detection of the pretreatment EGFR T790M mutation in non-small cell lung cancer patients with an EGFR-activating mutation using droplet digital PCR

Watanabe, Masaru, Kawaguchi, Tomoya, Isa, Shun-ichi, Ando, Masahiko, Tamiya, Akihiro, Kubo, Akihito, Saka, Hideo, Takeo, Sadanori +10 more·2015·Clinical Cancer Research

Published version of a preprint

Abstract

PURPOSE: The resistance to the EGFR tyrosine kinase inhibitors (TKI) is a major concern in non-small cell lung cancer (NSCLC) treatment. T790M mutation in EGFR accounts for nearly 50% of the acquired resistance to EGFR-TKIs. Earlier studies suggested that T790M mutation was also detected in TKI-naïve NSCLCs in a small cohort. Here, we use an ultra-sensitive droplet digital PCR (ddPCR) technique to address the incidence and clinical significance of pretreatment T790M in a larger cohort. EXPERIMENTAL DESIGN: ddPCR was established as follows: wild-type or T790M mutation-containing DNA fragments were cloned into plasmids. Candidate threshold was identified using wild-type plasmid, normal human genomic DNA, and human A549 cell line DNA, which expresses wild type. Surgically resected tumor tissues from 373 NSCLC patients with EGFR-activating mutations were then examined for the presence of T790M using ddPCR. RESULTS: Our data revealed a linear performance for this ddPCR method (R(2) = 0.998) with an analytical sensitivity of approximately 0.001%. The overall incidence of the pretreatment T790M mutation was 79.9% (298/373), and the frequency ranged from 0.009% to 26.9%. The T790M mutation was detected more frequently in patients with a larger tumor size (P = 0.019) and those with common EGFR-activating mutations (P = 0.022), as compared with the others. CONCLUSIONS: The ultra-sensitive ddPCR assay revealed that pretreatment T790M was found in the majority of NSCLC patients with EGFR-activating mutations. ddPCR should be utilized for detailed assessment of the impact of the low frequency pretreatment T790M mutation on treatment with EGFR-TKIs.

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Crossref · 10.1158/1078-0432.ccr-14-2151

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Authors
Watanabe, M., Kawaguchi, T., Isa, S.-I., Ando, M., Tamiya, A., Kubo, A., Saka, H., Takeo, S., Adachi, H., Tagawa, T., Kakegawa, S., Yamashita, M., Kataoka, K., Ichinose, Y., Takeuchi, Y., Sakamoto, K., Matsumura, A., & Koh, Y.
Affiliations
  • Wakayama Medical University (JP)
  • Osaka City University (JP)
  • NHO Kinki Chuo Chest Medical Center (JP)
  • Nagoya University Hospital (JP)
  • Aichi Medical University (JP)
  • National Hospital Organization (JP)
  • National Kyushu Medical Center (JP)
  • Sapporo National Hospital (JP)
  • Nagasaki Medical Center (JP)
  • Shikoku Cancer Center (JP)
  • Iwakuni Medical Center (JP)
  • National Hospital Organization Kyushu Cancer Center (JP)
  • Toneyama National Hospital (JP)
  • National Hospital Organization Yokohama Medical Center (JP)
Corresponding author
Koh, Yasuhiro
Venue
Clinical Cancer Research
Published
2015-08-01
Volume
21
Issue
15
Pages
3552-3560
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2006126363
Cited by
216
References
42
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 9 · 2022: 24 · 2021: 19 · 2020: 22 · 2019: 30 · 2018: 19 · 2017: 47 · 2016: 32 · 2015: 6
FWCI
27.38
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (25460896, 23501314)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
Keywords
T790M mutation, non-small cell lung cancer, EGFR activating mutations, droplet digital PCR, EGFR tyrosine kinase inhibitors, acquired drug resistance, tumor size, analytical sensitivity
MeSH terms
Adult, Aged, Aged, 80 and over, Carcinoma, Non-Small-Cell Lung, Female, Gene Frequency, Humans, Male, Middle Aged, Mutation, Polymerase Chain Reaction, Drug Resistance, Neoplasm, Protein Kinase Inhibitors, Precision Medicine, ErbB Receptors

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