Volume 41, Issue 1 pp. 208-215
ORIGINAL ARTICLE

Receptor tyrosine kinase MET as potential target of multi-kinase inhibitor and radiosensitizer sorafenib in HNSCC

Kaweh Beizaei

Kaweh Beizaei

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Lisa Gleißner MS

Lisa Gleißner MS

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Konstantin Hoffer

Konstantin Hoffer

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Lara Bußmann MD

Lara Bußmann MD

Department of Otorhinolaryngology and Head and Neck Surgery, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Anh Thu Vu

Anh Thu Vu

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Leonhard Steinmeister MD

Leonhard Steinmeister MD

Department for Diagnostic and Interventional Radiology and Nuclear Medicine, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Simon Laban MD

Simon Laban MD

Department of Otorhinolaryngology and Head and Neck Surgery, University Medical Center Ulm, Ulm, Germany

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Nikolaus Möckelmann MD

Nikolaus Möckelmann MD

Department of Otorhinolaryngology and Head and Neck Surgery, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Adrian Münscher MD

Adrian Münscher MD

Department of Otorhinolaryngology and Head and Neck Surgery, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Cordula Petersen MD

Cordula Petersen MD

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Kai Rothkamm PhD

Kai Rothkamm PhD

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

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Malte Kriegs PhD

Corresponding Author

Malte Kriegs PhD

Laboratory of Radiobiology and Experimental Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg, Hamburg-Eppendorf, Germany

Correspondence

Malte Kriegs, Laboratory of Radiobiology and Experimental Radiation Oncology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, Hamburg D-20246, Germany.

Email: [email protected]

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First published: 15 December 2018
Citations: 7
Funding information: Bundesministerium für Bildung und Forschung, Grant/Award Number: 02NUK032; Hamburger Stiftung zur Förderung der Krebsbekämpfung; Hamburger Krebsgesellschaft; Bayer HealthCare

Abstract

Background

The multi-kinase inhibitor sorafenib displays antitumoral effects in head and neck squamous cell carcinoma (HNSCC); however, the targeted kinases are unknown. Here we aimed to identify those kinases to determine the mechanism of sorafenib-mediated effects and establish candidate biomarkers for patient stratification.

Methods

The effects of sorafenib and MET inhibitors crizotinib and SU11274 were analyzed using a slide-based antibody array, Western blotting, proliferation, and survival assays. X-rays were used for irradiations.

Results

Sorafenib inhibited auto-phosphorylation of epidermal growth factor receptor and MET, which has not been described previously. MET expression in HNSCC cells was not always associated with activity/phosphorylation. Furthermore, sorafenib-dependent cell kill and radiosensitization was not associated with MET level. Although MET inhibitors blocked proliferation, they caused only mild cytotoxicity and no radiosensitization.

Conclusion

We identified MET as a new potential target of sorafenib. However, MET inhibition is not the cause for sorafenib-mediated cytotoxicity or radiosensitization.

CONFLICT OF INTEREST

The authors declare that they have no conflicts of interest with the contents of this article.

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