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Correlation of the Ga-68-Bombesin Analog Ga-68-BZH3 with Receptors Expression in Gliomas as Measured by Quantitative Dynamic Positron Emission Tomography (dPET) and Gene Arrays

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Abstract

Purpose

The kinetics of Ga-68-BZH3, a Ga-68-bombesin analog, was compared to molecular biological data obtained from gene arrays in seven patients with a recurrent glioma. The primary aim of this study was the correlation of receptor expression and tracer kinetics.

Procedures

Dynamic positron emission tomography studies were performed and the data were analyzed by a volume-of-interest technique using a two-tissue compartment model as well as a non-compartment model. Gene array data were obtained from gene array analysis of tumor tissue samples.

Results

The correlation analysis revealed a significant nonlinear correlation of r = 0.89 (p < 0.03) for k1 and BB2 (gastrin-releasing peptide receptor). BB1 and BB3 were not significantly correlated with k1. vb and k3 were not significantly correlated with the expression data of the receptors on the p < 0.05 level.

Conclusions

The parameter k1 is correlated with the expression of BB2 based on gene array data. The quantitative analysis of the Ga-68-BZH3 kinetics can be used to predict the receptor expression of BB2 in gliomas based on k1 of the compartment analysis. However, this study is limited to the expression data on the mRNA level and further studies are needed to assess the correlation of gene expression on the protein level.

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The authors declare that they have no conflict of interest.

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Correspondence to Ludwig G. Strauss.

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Strauss, L.G., Koczan, D., Seiz, M. et al. Correlation of the Ga-68-Bombesin Analog Ga-68-BZH3 with Receptors Expression in Gliomas as Measured by Quantitative Dynamic Positron Emission Tomography (dPET) and Gene Arrays. Mol Imaging Biol 14, 376–383 (2012). https://doi.org/10.1007/s11307-011-0508-0

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  • DOI: https://doi.org/10.1007/s11307-011-0508-0

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