Establishment and comparative characterization of novel squamous cell non-small cell lung cancer cell lines and their corresponding tumor tissue
Background: In selected patients with advanced non-small cell lung cancer (NSCLC) the EGFR (epidermal growth factor receptor) tyrosine kinase inhibitor (TKI) gefitinib (IRESSA) shows response rates of ≥70% and a significant prolongation of progression free survival (PFS). However, cogent biomarkers...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
January 2012
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| In: |
Lung cancer
Year: 2012, Jahrgang: 75, Heft: 1, Pages: 45-57 |
| ISSN: | 1872-8332 |
| DOI: | 10.1016/j.lungcan.2011.05.020 |
| Online-Zugang: | Resolving-System, Volltext: http://dx.doi.org/10.1016/j.lungcan.2011.05.020 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0169500212001146 
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| Verfasserangaben: | Sandra Gottschling, Anna Jauch, Ruprecht Kuner, Esther Herpel, Karin Mueller-Decker, Philipp A. Schnabel, Elizabeth C. Xu, Thomas Muley, Holger Sültmann, Christian Bender, Martin Granzow, Thomas Efferth, Hans Hoffmann, Hendrik Dienemann, Felix J.F. Herth, Michael Meister |
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| 245 | 1 | 0 | |a Establishment and comparative characterization of novel squamous cell non-small cell lung cancer cell lines and their corresponding tumor tissue |c Sandra Gottschling, Anna Jauch, Ruprecht Kuner, Esther Herpel, Karin Mueller-Decker, Philipp A. Schnabel, Elizabeth C. Xu, Thomas Muley, Holger Sültmann, Christian Bender, Martin Granzow, Thomas Efferth, Hans Hoffmann, Hendrik Dienemann, Felix J.F. Herth, Michael Meister |
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| 520 | |a Background: In selected patients with advanced non-small cell lung cancer (NSCLC) the EGFR (epidermal growth factor receptor) tyrosine kinase inhibitor (TKI) gefitinib (IRESSA) shows response rates of ≥70% and a significant prolongation of progression free survival (PFS). However, cogent biomarkers predicting long-term response to EGFR-TKIs are yet lacking. Cancer stem-like cells (CSC) are thought to play a pivotal role in tumor regeneration and appear to be influenced by the EGFR-pathway. This makes them a promising candidate for predicting long-term response to EGFR-TKIs. Materials and methods: We analyzed pre-therapeutic tissue specimens of a rare and specific subset of previously treated German patients with advanced NSCLC who experienced ≥3 year response to gefitinib within the International IRESSA EAP. 11/20 identified long-term responders (LTRs) had appropriate tissue specimens available. Those were analyzed for EGFR and k-ras (Kirsten rat sarcoma) mutations, EGFR and c-met (met proto-oncogene) amplifications and protein expression of EGFR, E-cadherin/vimentin and the CSC antigens CD133 and BCRP1 (breast cancer resistance protein 1). The results were compared to primary resistant patients (RPs) and intermediate responders (IRs) showing a median response of 8.6 months. Results: Each group consisted of 6 women and 5 men, with 1 squamous cell carcinoma (SCC) and 10 adenocarcinoma (AC). Along the LTRs, all but the SCC had EGFR mutations, whereas the RPs had no EGFR, but k-ras mutations in 5/11 cases. 8/11 IRs had EGFR and 3/11 k-ras mutations, of which 2 occurred concomitantly. One patient of each group had an EGFR and/or c-met amplification. EGFR and E-cadherin/vimentin expression was not different between the groups, whereas CD133 was expressed only in 4/10 LTRs and BCRP1 predominantly in responders. The LTRs showed a substantially longer mean PFS to previous therapies, a substantially lower number of metastatic sites and almost exclusively pulmonary or pleural metastasis. Conclusion: LTRs display established properties of EGFR-TKI responders. Antigens characterizing CSC might identify a fraction of LTRs and matter of interest for further evaluation. | ||
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| 650 | 4 | |a Cancer stem-like cell | |
| 650 | 4 | |a Long-term response | |
| 650 | 4 | |a Non-small cell lung cancer | |
| 650 | 4 | |a tyrosine kinase inhibitor | |
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