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Erschienen in: Journal of Cancer Research and Clinical Oncology 10/2018

30.07.2018 | Original Article–Cancer Research

TA-MUC1 as detected by the fully humanized, therapeutic antibody Gatipotzumab predicts poor prognosis in cervical cancer

verfasst von: Sabine Heublein, Klaus Friese, Bernd Kost, Frederik Marmé, Christina Kuhn, Sven Mahner, Christian Dannecker, Doris Mayr, Udo Jeschke, Aurelia Vattai

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 10/2018

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Abstract

Background

Gatipotuzumab is a fully humanized antibody which was designed to detect a cancer-specific glyco-modification of MUC1 (termed ‘TA-MUC1’) and which was optimized to effectively trigger antibody-dependent-cell-mediated cytotoxicity (ADCC) in cancer cells. Clinical trials investigating therapeutic efficacy of this antibody have been published recently. The current analysis aimed to determine whether TA-MUC1—as detected by Gatipotuzumab—is expressed in cervical cancer tissue and whether binding of Gatipotuzumab is associated with clinico-pathological variables including recurrence free (RFS) and overall survival (OS).

Methods

Cervical cancer tissue (n = 250) was stained for TA-MUC1 using Gatipotuzumab employing a standardized immunohistochemistry protocol. Staining was scored by applying the IR-score. Results were binarized and tested for association to clinico-pathological parameters.

Results

TA-MUC1 as stained by Gatipotuzumab was detected in 188 (75.2%) out of the 250 cervical cancer cases investigated. Expression of TA-MUC1 was restricted to cancer cells and was positively correlated with viral oncoprotein E6. Membrane staining of TA-MUC1 predicted significantly reduced RFS and OS. Importantly, expression of TA-MUC1 at the cell surface identified a group of early stage cervical cancer patients with exceptional short RFS and OS.

Conclusions

We report TA-MUC1—the antigen detected by Gatipotzumab—to be widely expressed in cervical cancer tissue and to localize to the cell membrane. The latter is seen as a pre-requisite to target this epitope by antibody-drug conjugates or antibodies eliciting ADCC. Since especially, membrane localization of TA-MUC1 predicted poor prognosis, evaluating Gatipotuzumab for its therapeutic efficacy in cervical cancer may turn attractive.
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Metadaten
Titel
TA-MUC1 as detected by the fully humanized, therapeutic antibody Gatipotzumab predicts poor prognosis in cervical cancer
verfasst von
Sabine Heublein
Klaus Friese
Bernd Kost
Frederik Marmé
Christina Kuhn
Sven Mahner
Christian Dannecker
Doris Mayr
Udo Jeschke
Aurelia Vattai
Publikationsdatum
30.07.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 10/2018
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-018-2706-5

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