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Schubart, Christoph; Stöhr, Robert; Tögel, Lars; Fuchs, Florian; Sirbu, Horia; Seitz, Gerhard; Seggewiss-Bernhardt, Ruth; Leistner, Rumo; Sterlacci, William; Vieth, Michael; Seidl, Christoph; Mugler, Michael; Kapp, Markus; Hohenforst-Schmidt, Wolfgang; Hartmann, Arndt; Haller, Florian; Erber, Ramona
Cancers, 10/2021, Letnik: 13, Številka: 19Journal Article
In non-small cell lung cancer (NSCLC), approximately 1–3% of cases harbor an increased gene copy number (GCN) of the MET gene. This alteration can be due to de novo amplification of the MET gene or can represent a secondary resistance mechanism in response to targeted therapies. To date, the gold standard method to evaluate the GCN of MET is fluorescence in situ hybridization (FISH). However, next-generation sequencing (NGS) is becoming more relevant to optimize therapy by revealing the mutational profile of each NSCLC. Using evaluable n = 205 NSCLC cases of a consecutive cohort, this study addressed the question of whether an amplicon based NGS assay can completely replace the FISH method regarding the classification of MET GCN status. Out of the 205 evaluable cases, only n = 9 cases (43.7%) of n = 16 high-level MET amplified cases assessed by FISH were classified as amplified by NGS. Cases harboring a MET GCN > 10 showed the best concordance when comparing FISH versus NGS (80%). This study confirms that an amplicon-based NGS assessment of the MET GCN detects high-level MET amplified cases harboring a MET GCN > 10 but fails to detect the various facets of MET gene amplification in the context of a therapy-induced resistance mechanism.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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