Volume 123, Issue 7 pp. 1551-1555
Cancer Cell Biology

Cancer testis antigen expression in gastrointestinal stromal tumors: New markers for early recurrence

Daniel Perez

Daniel Perez

Department of Visceral and Transplant Surgery, University Hospital Zurich, Zurich, Switzerland

Daniel Perez and Thomas Herrmann contributed equally to this work.

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Thomas Herrmann

Thomas Herrmann

Medical Oncology, National Center for Tumor Diseases, University Hospital, Heidelberg, Germany

Daniel Perez and Thomas Herrmann contributed equally to this work.

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Achim A. Jungbluth

Achim A. Jungbluth

Ludwig Institute for Cancer Research, New York Branch at Memorial Sloan-Kettering Cancer Center, New York, NY

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Pierre Samartzis

Pierre Samartzis

Department of Visceral and Transplant Surgery, University Hospital Zurich, Zurich, Switzerland

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Giulio Spagnoli

Giulio Spagnoli

Department of Research, Institute for Surgical Research and Hospital Management, University Hospital, Basel, Switzerland

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Nicolas Demartines

Nicolas Demartines

Department of Visceral and Transplant Surgery, University Hospital Zurich, Zurich, Switzerland

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Pierre-Alain Clavien

Pierre-Alain Clavien

Department of Visceral and Transplant Surgery, University Hospital Zurich, Zurich, Switzerland

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Silvia Marino

Silvia Marino

Department of Pathology, University Hospital Zurich, Zurich, Switzerland

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Burkhardt Seifert

Burkhardt Seifert

Biostatistics Unit ISPM, University of Zurich, Zurich, Switzerland

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Dirk Jaeger

Corresponding Author

Dirk Jaeger

Medical Oncology, National Center for Tumor Diseases, University Hospital, Heidelberg, Germany

Fax: +49-6221-56-7225.

Medical Oncology, NCT, University Hospital Heidelberg, Im Neuenheimer Feld 350, 69120 Heidelberg, GermanySearch for more papers by this author
First published: 21 July 2008
Citations: 27

Abstract

Cancer testis antigens (CTAs) are expressed in a variety of malignant tumors but not in any normal adult tissues except germ cells and occasionally placenta. Because of this tumor-associated pattern of expression, CTAs are regarded as potential vaccine targets. The expression of CTAs in gastrointestinal stromal tumors (GIST) has not been analyzed systematically previously. The present study was performed to analyze the expression of CTA in GIST and to determine if CTA expression correlates with prognosis. Thirty-five GIST patients were retrospectively analyzed for their expression of CTAs by immunohistochemistry using the followingmonoclonal antibodies (mAb/antigen): MA454/MAGE-A1, M3H67/MAGE-A3, 57B/MAGE-A4, CT7-33/MAGE-C1 and E978/NY-ESO-1. Fourteen tumors (40%) expressed 1 or more of the 5 CTAs tested. Fourteen percent (n = 5/35) were positive for MAGE-A1, MAGE-A3 or MAGE-A4, respectively. Twenty-six percent (n = 9/35) stained positive for MAGE-C1 and 20% (n = 7/35) for NY-ESO-1. A highly significant correlation between CTA expression and tumor recurrence risk was observed (71% vs. 29%; p = 0.027). In our study population, the high-risk GIST expressed CTAs more frequently than low-risk GIST (p = 0.012). High-risk GISTs which stained positive for at least 1 CTA, recurred in 100% (n = 25) of the cases. This is the first study analyzing CTA expression in GIST and its prognostic value for recurrence. The CTA staining could add information to the individual patient prognosis and represent an interesting target for future treatment strategies. © 2008 Wiley-Liss, Inc.

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