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Published in: Molecular Imaging and Biology 6/2013

01-12-2013 | Research Article

Preclinical Comparison of Near-Infrared-Labeled Cetuximab and Panitumumab for Optical Imaging of Head and Neck Squamous Cell Carcinoma

Authors: Kristine E. Day, Larissa Sweeny, Brian Kulbersh, Kurt R. Zinn, Eben L. Rosenthal

Published in: Molecular Imaging and Biology | Issue 6/2013

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Abstract

Purpose

Though various targets have been proposed and evaluated, no agent has yet been investigated in a clinical setting for head and neck cancer. The present study aimed to compare two fluorescently labeled anti-epidermal growth factor receptor (EGFR) antibodies for detection of head and neck squamous cell carcinoma (HNSCC).

Procedures

Antigen specificities and in vitro imaging of the fluorescently labeled anti-EGFR antibodies were performed. Next, immunodeficient mice (n = 22) bearing HNSCC (OSC-19 and SCC-1) tongue tumors received systemic injections of cetuximab-IRDye800CW, panitumumab-IRDye800CW, or IgG-IRDye800CW (a nonspecific control). Tumors were imaged and resected using two near-infrared imaging systems, SPY and Pearl. Fluorescent lymph nodes were also identified, and all resected tissues were sent for pathology.

Results

Panitumumab-IRDye800CW and cetuximab-IRDye800CW had specific and high affinity binding for EGFR (K D = 0.12 and 0.31 nM, respectively). Panitumumab-IRDye800CW demonstrated a 2-fold increase in fluorescence intensity compared to cetuximab-IRDye800CW in vitro. In vivo, both fluorescently labeled antibodies produced higher tumor-to-background ratios compared to IgG-IRDye800CW. However, there was no significant difference between the two in either cell line or imaging modality (OSC-19: p = 0.08 SPY, p = 0.48 Pearl; SCC-1: p = 0.77 SPY, p = 0.59 Pearl; paired t tests).

Conclusions

There was no significant difference between the two fluorescently labeled anti-EGFR monoclonal antibodies in murine models of HNSCC. Both cetuximab and panitumumab can be considered suitable targeting agents for fluorescent intraoperative detection of HNSCC.
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Metadata
Title
Preclinical Comparison of Near-Infrared-Labeled Cetuximab and Panitumumab for Optical Imaging of Head and Neck Squamous Cell Carcinoma
Authors
Kristine E. Day
Larissa Sweeny
Brian Kulbersh
Kurt R. Zinn
Eben L. Rosenthal
Publication date
01-12-2013
Publisher
Springer US
Published in
Molecular Imaging and Biology / Issue 6/2013
Print ISSN: 1536-1632
Electronic ISSN: 1860-2002
DOI
https://doi.org/10.1007/s11307-013-0652-9

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