Volume 124, Issue 11 pp. 2589-2596
Cancer Cell Biology

A novel mechanism for anti-EGFR antibody action involves chemokine-mediated leukocyte infiltration

Thomas K. Hoffmann

Corresponding Author

Thomas K. Hoffmann

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany

Department of Otorhinolaryngology, University of Essen, Hufelandstr. 55, University of Duisburg-Essen, 45147 Essen, GermanySearch for more papers by this author
Kerstin Schirlau

Kerstin Schirlau

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Enikö Sonkoly

Enikö Sonkoly

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Sven Brandau

Sven Brandau

Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany

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Stephan Lang

Stephan Lang

Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany

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Andor Pivarcsi

Andor Pivarcsi

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Vera Balz

Vera Balz

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Anja Müller

Anja Müller

Department of Radiooncology, Heinrich-Heine-University, Düsseldorf, Germany

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Bernhard Homey

Bernhard Homey

Department of Dermatology, Heinrich-Heine-University, Düsseldorf, Germany

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Edwin Boelke

Edwin Boelke

Department of Radiooncology, Heinrich-Heine-University, Düsseldorf, Germany

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Torsten Reichert

Torsten Reichert

Department of Maxillofacial Surgery, University of Regensburg, Regensburg, Germany

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Ulrike Friebe-Hoffmann

Ulrike Friebe-Hoffmann

Department of Obstetrics and Gynecology, Heinrich-Heine-University, Düsseldorf, Germany

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Jens Greve

Jens Greve

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany

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Patrick Schuler

Patrick Schuler

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany

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Kathrin Scheckenbach

Kathrin Scheckenbach

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Jörg Schipper

Jörg Schipper

Department of Otorhinolaryngology, Heinrich-Heine-University, Düsseldorf, Germany

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Murat Bas

Murat Bas

Department of Otorhinolaryngology, Technical University of Munich, Munich, Germany

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Theresa L. Whiteside

Theresa L. Whiteside

Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA

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Henning Bier

Henning Bier

Department of Otorhinolaryngology, Technical University of Munich, Munich, Germany

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First published: 25 March 2009
Citations: 50

Abstract

Overexpression of the epidermal growth factor receptor (EGFR) is a hallmark of squamous cell carcinoma of the head and neck (SCCHN). Monoclonal antibodies (mAbs) against EGFR are currently used for therapy of recurrent or metastatic disease; however, their mode of action is not completely understood. To investigate the immunological effects of anti-EGFR mAb, we generated a three-dimensional spheroid model of EGFR-expressing SCCHN and used this model to study the effect of anti-EGFR mAb on leukocyte migration toward tumors. Pretreatment with the blocking anti-EGFR mAb EMD 72000, its F(ab′)2 fragments or an EGFR tyrosine kinase inhibitor led to substantially increased leukocyte infiltration into EGFR overexpressing tumor spheroids, but not into those with low EGFR expression. Nonblocking anti-EGFR mAb or fibroblast-specific mAb did not affect leukocyte infiltration, suggesting that the observed increase in leukocyte infiltration depends on interference with EGFR activation. Using a human cytokine macroarray, we demonstrated that the blockade of EGFR by anti-EGFR mAb in EGFR-overexpressing SCCHN cells leads to differential expression of several cytokines and chemokines, including the chemokine MCP-1/CCL-2. The significant upregulation of MCP-1/CCL2 on exposure to anti-EGFR mAb was confirmed by quantitative PCR and enzyme-linked immunospot analyses. Moreover, blocking anti-MCP-1 antibody inhibited leukocyte migration toward tumor cells induced by anti-EGFR mAb, pointing to an important role of MCP-1/CCL2 in anti-EGFR mAb-induced leukocyte migration. Our findings demonstrate that anti-EGFR mAb induces leukocyte infiltration to tumor spheroids by upregulating chemokine expression. This novel mechanism for anti-EGFR mAb action may contribute to the antitumor effects of anti-EGFR mAb in vivo. © 2009 Wiley-Liss, Inc.

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