Cited by 574Lung Cancer Treatments and MutationsHER2/EGFR in Cancer ResearchCancer Genomics and Diagnostics

Rebiopsy of Lung Cancer Patients with Acquired Resistance to EGFR Inhibitors and Enhanced Detection of the T790M Mutation Using a Locked Nucleic Acid-Based Assay

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Arcila, Maria E., Oxnard, Geoffrey R., Nafa, Khedoudja, Riely, Gregory J., Solomon, Stephen B., Zakowski, Maureen F., Kris, Mark G., Pao, William +2 more·2011·Clinical Cancer Research

Published version of a preprint

Abstract

Background: The epidermal growth factor receptor (EGFR) mutation T790M is reported in approximately 50% of lung cancers with acquired resistance to EGFR inhibitors and is a potential prognostic and predictive biomarker. Its assessment can be challenging due to limited tissue availability and underdetection at low mutant allele levels. Here, we sought to determine the feasibility of tumor rebiopsy and to more accurately assess the prevalence of the T790M using a highly sensitive locked nucleic acid (LNA) PCR/sequencing assay. MET amplification was also analyzed. Methods: Patients with acquired resistance were rebiopsied and samples were studied for sensitizing EGFR mutations. Positive cases were evaluated for T790M using standard PCR-based methods and a subset were re-evaluated with an LNA-PCR/sequencing method with an analytical sensitivity of approximately 0.1%. MET amplification was assessed by FISH. Results: Of 121 patients undergoing tissue sampling, 104 (86%) were successfully analyzed for sensitizing EGFR mutations. Most failures were related to low tumor content. All patients (61/61) with matched pretreatment and resistance specimens showed concordance for the original sensitizing EGFR mutation. Standard T790M mutation analysis on 99 patients detected 51(51%) mutants. Retesting of 30 negative patients by the LNA-based method detected 11 additional mutants for an estimated prevalence of 68%. MET was amplified in 11% of cases (4/37). Conclusions: The re-biopsy of lung cancer patients with acquired resistance is feasible and provides sufficient material for mutation analysis in most patients. Using high sensitivity methods, the T790M is detected in up to 68% of these patients. Clin Cancer Res; 17(5); 1169–80. ©2011 AACR.

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Authors
Arcila, M. E., Oxnard, G. R., Nafa, K., Riely, G. J., Solomon, S. B., Zakowski, M. F., Kris, M. G., Pao, W., Miller, V. A., & Ladanyi, M.
Affiliations
  • Memorial Sloan Kettering Cancer Center (US)
  • Authors' Affiliations: 1Molecular Diagnostics Service, Department of Pathology; 2Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine; 3Interventional Radiology Service, Department of Radiology; and 4Human Oncology and Pathogenesis Program, Memorial Sloan-Kettering Cancer Center, New York, New York
Corresponding author
Ladanyi, Marc
Venue
Clinical Cancer Research
Published
2011-03-01
Volume
17
Issue
5
Pages
1169-1180
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2022670843
Cited by
574
References
48
Citations by year
2026: 7 · 2025: 10 · 2024: 16 · 2023: 18 · 2022: 35 · 2021: 34 · 2020: 34 · 2019: 41 · 2018: 61 · 2017: 62 · 2016: 57 · 2015: 52 · 2014: 40 · 2013: 53 · 2012: 36
FWCI
39.70
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA121210, P01CA129243, R21CA115051)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
lung cancer, EGFR inhibitors, acquired drug resistance, T790M mutation, MET amplification, predictive biomarkers
MeSH terms
Adult, Aged, Aged, 80 and over, Alleles, Biopsy, DNA Mutational Analysis, Female, Humans, Lung Neoplasms, Male, Middle Aged, Mutation, Oligonucleotides, Prognosis, Biomarkers, Tumor, Polymerase Chain Reaction, In Situ Hybridization, Fluorescence, Drug Resistance, Neoplasm, ErbB Receptors

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