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Erschienen in: Virchows Archiv 1/2012

01.07.2012 | Original Article

FGFR1 expression and gene copy numbers in human lung cancer

verfasst von: Lukas H. Kohler, Masoud Mireskandari, Thomas Knösel, Annelore Altendorf-Hofmann, Almut Kunze, Andreas Schmidt, Norbert Presselt, Yuan Chen, Iver Petersen

Erschienen in: Virchows Archiv | Ausgabe 1/2012

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Abstract

FGFR1 is a receptor tyrosine kinase of which the ligands belong to the fibroblast growth factor family. To evaluate the significance of FGFR1 in lung cancer, we analysed tumours by immunohistochemistry (IHC) and fluorescence in situ hybridization (FISH). Tissue microarrays were constructed containing 380 lung cancer samples including squamous cell carcinomas (SCC), adenocarcinomas (ADC), non-small cell lung cancer not otherwise specified, metastases, neuroendocrine tumours, large cell lung cancer and small cell lung cancer. FGFR1 expression was analysed by IHC and scored semi-quantitatively by a four-tier approach (0, 1, 2, 3). Using dual-colour interphase FISH with probes specific for the locus on 8p12 and the centromere of chromosome 8 (CEN8), copy numbers of FGFR1 were determined. High expression of FGFR1 was associated with increased FGFR1 gene copy numbers in squamous cell carcinoma (p < 0.001). The FGFR1 locus was equally affected by copy number losses and gains. The higher FGFR1 gene copy numbers in SCC compared to ADC did not reach statistical significance. High copy number amplification of FGFR1 was a very rare event, the FGFR1/CEN8 signal ratio reaching a maximum value of 2.75. There were no significant associations between FGFR1 and clinicopathological parameters. Fibroblast growth factor signalling represents an interesting therapeutic target in lung cancer. However, the pathways are complex with potential oncogenic and anti-oncogenic activities. Our data may help to define criteria for selecting patients that may benefit from these new therapeutic options.
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Metadaten
Titel
FGFR1 expression and gene copy numbers in human lung cancer
verfasst von
Lukas H. Kohler
Masoud Mireskandari
Thomas Knösel
Annelore Altendorf-Hofmann
Almut Kunze
Andreas Schmidt
Norbert Presselt
Yuan Chen
Iver Petersen
Publikationsdatum
01.07.2012
Verlag
Springer-Verlag
Erschienen in
Virchows Archiv / Ausgabe 1/2012
Print ISSN: 0945-6317
Elektronische ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-012-1250-y

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