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BMC Cancer
Published in: BMC Cancer 1/2016

Open Access 01-12-2016 | Research article

EpCAM as multi-tumour target for near-infrared fluorescence guided surgery

Authors: P. B. A. A. van Driel, M. C. Boonstra, H. A. J. M. Prevoo, M. van de Giessen, T. J. A. Snoeks, Q. R. J. G. Tummers, S. Keereweer, R. A. Cordfunke, A. Fish, J. D. H. van Eendenburg, B. P. F. Lelieveldt, J. Dijkstra, C. J. H. van de Velde, P. J. K. Kuppen, A. L. Vahrmeijer, C. W. G. M. Löwik, C. F. M. Sier

Published in: BMC Cancer | Issue 1/2016

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Abstract

Background

Evaluation of resection margins during cancer surgery can be challenging, often resulting in incomplete tumour removal. Fluorescence-guided surgery (FGS) aims to aid the surgeon to visualize tumours and resection margins during surgery. FGS relies on a clinically applicable imaging system in combination with a specific tumour-targeting contrast agent. In this study EpCAM (epithelial cell adhesion molecule) is evaluated as target for FGS in combination with the novel Artemis imaging system.

Methods

The NIR fluorophore IRDye800CW was conjugated to the well-established EpCAM specific monoclonal antibody 323/A3 and an isotype IgG1 as control. The anti-EpCAM/800CW conjugate was stable in serum and showed preserved binding capacity as evaluated on EpCAM positive and negative cell lines, using flow cytometry and cell-based plate assays. Four clinically relevant orthotopic tumour models, i.e. colorectal cancer, breast cancer, head and neck cancer, and peritonitis carcinomatosa, were used to evaluate the performance of the anti-EpCAM agent with the clinically validated Artemis imaging system. The Pearl Impulse small animal imaging system was used as reference. The specificity of the NIRF signal was confirmed using bioluminescence imaging and green-fluorescent protein.

Results

All tumour types could clearly be delineated and resected 72 h after injection of the imaging agent. Using NIRF imaging millimetre sized tumour nodules were detected that were invisible for the naked eye. Fluorescence microscopy demonstrated the distribution and tumour specificity of the anti-EpCAM agent.

Conclusions

This study shows the potential of an EpCAM specific NIR-fluorescent agent in combination with a clinically validated intraoperative imaging system to visualize various tumours during surgery.
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Metadata
Title
EpCAM as multi-tumour target for near-infrared fluorescence guided surgery
Authors
P. B. A. A. van Driel
M. C. Boonstra
H. A. J. M. Prevoo
M. van de Giessen
T. J. A. Snoeks
Q. R. J. G. Tummers
S. Keereweer
R. A. Cordfunke
A. Fish
J. D. H. van Eendenburg
B. P. F. Lelieveldt
J. Dijkstra
C. J. H. van de Velde
P. J. K. Kuppen
A. L. Vahrmeijer
C. W. G. M. Löwik
C. F. M. Sier
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2016
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-016-2932-7

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