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Published in: Molecular Imaging and Biology 3/2012

01-06-2012 | Research Article

An Evaluation of 2-deoxy-2-[18F]Fluoro-D-Glucose and 3′-deoxy-3′-[18F]-Fluorothymidine Uptake in Human Tumor Xenograft Models

Authors: Heather Keen, Bernd Pichler, Damaris Kukuk, Olivier Duchamp, Olivier Raguin, Aoife Shannon, Nichola Whalley, Vivien Jacobs, Juliana Bales, Neill Gingles, Sally-Ann Ricketts, Stephen R. Wedge

Published in: Molecular Imaging and Biology | Issue 3/2012

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Abstract

Purpose

The aim of this study is to assess the variability of 2-deoxy-2-[18F]fluoro-d-glucose ([18F]-FDG) and 3′-deoxy-3′-[18F]-fluorothymidine ([18F]-FLT) uptake in pre-clinical tumor models and examine the relationship between imaging data and related histological biomarkers.

Procedures

[18F]-FDG and [18F]-FLT studies were carried out in nine human tumor xenograft models in mice. A selection of the models underwent histological analysis for endpoints relevant to radiotracer uptake. Comparisons were made between in vitro uptake, in vivo imaging, and ex vivo histopathology data using quantitative and semi-quantitative analysis.

Results

In vitro data revealed that [1-14C]-2-deoxy-d-glucose ([14C]-2DG) uptake in the tumor cell lines was variable. In vivo, [18F]-FDG and [18F]-FLT uptake was highly variable across tumor types and uptake of one tracer was not predictive for the other. [14C]-2DG uptake in vitro did not predict for [18F]-FDG uptake in vivo. [18F]-FDG SUV was inversely proportional to Ki67 and necrosis levels and positively correlated with HKI. [18F]-FLT uptake positively correlated with Ki67 and TK1.

Conclusion

When evaluating imaging biomarkers in response to therapy, the choice of tumor model should take into account in vivo baseline radiotracer uptake, which can vary significantly between models.
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Metadata
Title
An Evaluation of 2-deoxy-2-[18F]Fluoro-D-Glucose and 3′-deoxy-3′-[18F]-Fluorothymidine Uptake in Human Tumor Xenograft Models
Authors
Heather Keen
Bernd Pichler
Damaris Kukuk
Olivier Duchamp
Olivier Raguin
Aoife Shannon
Nichola Whalley
Vivien Jacobs
Juliana Bales
Neill Gingles
Sally-Ann Ricketts
Stephen R. Wedge
Publication date
01-06-2012
Publisher
Springer-Verlag
Published in
Molecular Imaging and Biology / Issue 3/2012
Print ISSN: 1536-1632
Electronic ISSN: 1860-2002
DOI
https://doi.org/10.1007/s11307-011-0504-4

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