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dc.creatorMacías, M. (Mónica)-
dc.creatorAlegre-Martinez, E. (Estibaliz)-
dc.creatorAlkorta-Aranburu, G. (Gorka)-
dc.creatorPatiño-García, A. (Ana)-
dc.creatorMateos, B. (Beatriz)-
dc.creatorAndueza, M.P. (Maria P.)-
dc.creatorGurpide, A. (Alfonso)-
dc.creatorLopez-Picazo, J.M. (José M.)-
dc.creatorGil-Bazo, I. (Ignacio)-
dc.creatorPerez-Gracia, J.L. (Jose Luis)-
dc.creatorGonzález, Á. (Álvaro)-
dc.date.accessioned2022-03-11T12:27:45Z-
dc.date.available2022-03-11T12:27:45Z-
dc.date.issued2019-
dc.identifier.citationMacías, M. (Mónica); Alegre-Martinez, E. (Estibaliz); Alkorta-Aranburu, G. (Gorka); et al. "The dynamic use of EGFR mutation analysis in cell-free DNA as a follow-up biomarker during different treatment lines in non-small-cell lung cancer patients". Disease Markers. 2019, 2019, 7954921es
dc.identifier.issn0278-0240-
dc.identifier.urihttps://hdl.handle.net/10171/63141-
dc.description.abstractEpidermal growth factor receptor (EGFR) mutational testing in advanced non-small-cell lung cancer (NSCLC) is usually performed in tumor tissue, although cfDNA (cell-free DNA) could be an alternative. We evaluated EGFR mutations in cfDNA as a complementary tool in patients, who had already known EGFR mutations in tumor tissue and were treated with either EGFR-tyrosine kinase inhibitors (TKIs) or chemotherapy. We obtained plasma samples from 21 advanced NSCLC patients with known EGFR tumor mutations, before and during therapy with EGFR-TKIs and/or chemotherapy. cfDNA was isolated and EGFR mutations were analyzed with the multiple targeted cobas EGFR Mutation Test v2. EGFR mutations were detected at baseline in cfDNA from 57% of patients. The semiquantitative index (SQI) significantly decreased from the baseline (median = 11, IQR = 9 5-13) to the best response (median = 0, IQR = 0-0, p < 0 01), followed by a significant increase at progression (median = 11, IQR = 11-15, p < 0 01) in patients treated with either EGFR-TKIs or chemotherapy. The SQI obtained with the cobas EGFR Mutation Test v2 did not correlate with the concentration in copies/mL determined by droplet digital PCR. Resistance mutation p.T790M was observed at progression in patients with either type of treatment. In conclusion, cfDNA multiple targeted EGFR mutation analysis is useful for treatment monitoring in tissue of EGFR-positive NSCLC patients independently of the drug received.es_ES
dc.description.sponsorshipThis work was supported in part by Roche Diagnostics and DIANA grants.es_ES
dc.language.isoenges_ES
dc.publisherHindawi Limitedes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectEpidermal growth factor receptor (EGFR)es_ES
dc.subjectNon-small-cell lung cancer (NSCLCes_ES
dc.subjectCell-free DNAes_ES
dc.titleThe dynamic use of EGFR mutation analysis in cell-free DNA as a follow-up biomarker during different treatment lines in non-small-cell lung cancer patientses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.description.noteThis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.es_ES
dc.identifier.doi10.1155/2019/7954921-
dadun.citation.publicationNameDisease Markerses_ES
dadun.citation.startingPage7954921es_ES
dadun.citation.volume2019es_ES

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