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Published in: Molecular Imaging and Biology 5/2009

01-09-2009 | Research Article

Comparison of [18F]-Tracers in Various Experimental Tumor Models by PET Imaging and Identification of an Early Response Biomarker for the Novel Microtubule Stabilizer Patupilone

Authors: T. Ebenhan, M. Honer, S.M. Ametamey, P.A. Schubiger, M. Becquet, S. Ferretti, C. Cannet, M. Rausch, P.M.J. McSheehy

Published in: Molecular Imaging and Biology | Issue 5/2009

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Abstract

Purpose

The suitability of [18F]FDG, [18F]FLT, [18F]FET, and [18F]FCH as non-invasive positron emission tomography (PET) biomarkers for monitoring response to chemotherapy was analyzed in various experimental tumor models.

Procedures

Tracer uptake into three syngeneic rodent tumor models and ten human xenograft models was evaluated using semiquantitative analysis of small-animal PET data. Murine RIF-1 fibrosarcomas and [18F]FLT were selected to monitor the effects of the novel cytotoxic patupilone.

Results

Except [18F]FCH, all tracers provided good tumor visualization. Highest [18F]FDG uptake was identified in syngeneic tumors. Xenograft models, however, showed low [18F]FDG SUVs and were better visualized by [18F]FLT. Monitoring the effects of patupilone on [18F]FLT uptake in RIF-1 tumors revealed a significant decrease of tracer uptake after 24 h, which strongly negatively correlated with apoptosis.

Conclusion

[18F]FLT PET of experimental tumors is a viable complement to [18F]FDG for preclinical drug development. [18F]FLT may be an excellent biomarker for patupilone-induced apoptosis.
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Metadata
Title
Comparison of [18F]-Tracers in Various Experimental Tumor Models by PET Imaging and Identification of an Early Response Biomarker for the Novel Microtubule Stabilizer Patupilone
Authors
T. Ebenhan
M. Honer
S.M. Ametamey
P.A. Schubiger
M. Becquet
S. Ferretti
C. Cannet
M. Rausch
P.M.J. McSheehy
Publication date
01-09-2009
Publisher
Springer-Verlag
Published in
Molecular Imaging and Biology / Issue 5/2009
Print ISSN: 1536-1632
Electronic ISSN: 1860-2002
DOI
https://doi.org/10.1007/s11307-009-0216-1

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