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Published in: Molecular Imaging and Biology 3/2011

01-06-2011 | Research Article

[18F]FLT PET for Non-Invasive Monitoring of Early Response to Gene Therapy in Experimental Gliomas

Authors: Maria A. Rueger, Mitra Ameli, Hongfeng Li, Alexandra Winkeler, Benedikt Rueckriem, Stefan Vollmar, Norbert Galldiks, Volker Hesselmann, Cornel Fraefel, Klaus Wienhard, Wolf-Dieter Heiss, Andreas H. Jacobs

Published in: Molecular Imaging and Biology | Issue 3/2011

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Abstract

The purpose of this study was to investigate the potential of 3′-deoxy-3′-[18F]fluorothymidine ([18F]FLT) positron emission tomography (PET) to detect early treatment responses in gliomas. Human glioma cells were stably transduced with genes yielding therapeutic activity, sorted for different levels of exogenous gene expression, and implanted subcutaneously into nude mice. Multimodality imaging during prodrug therapy included (a) magnetic resonance imaging, (b) PET with 9-(4-[18F]fluoro-3-hydroxymethylbutyl)guanine assessing exogenous gene expression, and (c) repeat [18F]FLT PET assessing antiproliferative therapeutic response. All stably transduced gliomas responded to therapy with significant reduction in tumor volume and [18F]FLT accumulation within 3 days after initiation of therapy. The change in [18F]FLT uptake before and after treatment correlated to volumetrically calculated growth rates. Therapeutic efficacy as monitored by [18F]FLT PET correlated to levels of therapeutic gene expression measured in vivo. Thus, [18F]FLT PET assesses early antiproliferative effects, making it a promising radiotracer for the development of novel treatments for glioma.
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Metadata
Title
[18F]FLT PET for Non-Invasive Monitoring of Early Response to Gene Therapy in Experimental Gliomas
Authors
Maria A. Rueger
Mitra Ameli
Hongfeng Li
Alexandra Winkeler
Benedikt Rueckriem
Stefan Vollmar
Norbert Galldiks
Volker Hesselmann
Cornel Fraefel
Klaus Wienhard
Wolf-Dieter Heiss
Andreas H. Jacobs
Publication date
01-06-2011
Publisher
Springer-Verlag
Published in
Molecular Imaging and Biology / Issue 3/2011
Print ISSN: 1536-1632
Electronic ISSN: 1860-2002
DOI
https://doi.org/10.1007/s11307-010-0361-6

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