Abstract
The αvβ3 integrin is highly expressed in prostate cancer (PCa), in which it is a key player in tumour invasion, angiogenesis and metastasis formation. Therefore, αvβ3 integrin is considered a very promising target for molecular imaging of PCa. This study tested the potential of the novel αvβ3 integrin affine agent [68Ga]NOTA-RGD in comparison with the established [18F]fluoroethylcholine (FEC) and [18F]fluorodeoxyglucose (FDG) for assessing PCa using positron emission tomography (PET). [68Ga]NOTA-RGD showed a lower uptake in PC-3 and DU-145 cells compared with FEC and FDG. µPET imaging studies showed a good delineation of the PCa xenografts in mice. The means tumor-to-muscleand tumor-to-bone-ratio amounted 5.1 ± 1.4 and 5.2 ± 1.2 for [68Ga]NOTA-RGD compared with 2.6 ± 0.9 and 2.9 ± 1.6 for FDG, and 2.4 ± 0.7 and 0.8 ± 0.2 for FEC, respectively. The uptake of [68Ga]NOTA-RGD into tumor was fully inhibited by c(RGDfV), known to bind specifically to αvβ3 integrin, confirming the specificity of the tumor uptake in vivo. These results suggest that [68Ga]NOTA-RGD is a promising candidate for PET imaging of αvβ3 integrin expression in PCa and warrant further in vivo validations to ascertain its potential as an imaging agent for clinical use. The simple and fast preparation of [68Ga]NOTA-RGD may greatly facilitate its translation to a clinical setting.
Keywords: Angiogenesis, αvβ3 integrin, [68Ga]NOTA-RGD, PET imaging, prostate cancer.
Current Cancer Drug Targets
Title:PET Imaging with [68Ga]NOTA-RGD for Prostate Cancer: A Comparative Study with [18F]Fluorodeoxyglucose and [18F]Fluoroethylcholine
Volume: 14 Issue: 4
Author(s): Ina Israel, Dominik Richter, Jochen Stritzker, Michaela van Ooschot, Ulrike Donat, Andreas K. Buck and Samuel Samnick
Affiliation:
Keywords: Angiogenesis, αvβ3 integrin, [68Ga]NOTA-RGD, PET imaging, prostate cancer.
Abstract: The αvβ3 integrin is highly expressed in prostate cancer (PCa), in which it is a key player in tumour invasion, angiogenesis and metastasis formation. Therefore, αvβ3 integrin is considered a very promising target for molecular imaging of PCa. This study tested the potential of the novel αvβ3 integrin affine agent [68Ga]NOTA-RGD in comparison with the established [18F]fluoroethylcholine (FEC) and [18F]fluorodeoxyglucose (FDG) for assessing PCa using positron emission tomography (PET). [68Ga]NOTA-RGD showed a lower uptake in PC-3 and DU-145 cells compared with FEC and FDG. µPET imaging studies showed a good delineation of the PCa xenografts in mice. The means tumor-to-muscleand tumor-to-bone-ratio amounted 5.1 ± 1.4 and 5.2 ± 1.2 for [68Ga]NOTA-RGD compared with 2.6 ± 0.9 and 2.9 ± 1.6 for FDG, and 2.4 ± 0.7 and 0.8 ± 0.2 for FEC, respectively. The uptake of [68Ga]NOTA-RGD into tumor was fully inhibited by c(RGDfV), known to bind specifically to αvβ3 integrin, confirming the specificity of the tumor uptake in vivo. These results suggest that [68Ga]NOTA-RGD is a promising candidate for PET imaging of αvβ3 integrin expression in PCa and warrant further in vivo validations to ascertain its potential as an imaging agent for clinical use. The simple and fast preparation of [68Ga]NOTA-RGD may greatly facilitate its translation to a clinical setting.
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Cite this article as:
Israel Ina, Richter Dominik, Stritzker Jochen, Ooschot van Michaela, Donat Ulrike, Buck K. Andreas and Samnick Samuel, PET Imaging with [68Ga]NOTA-RGD for Prostate Cancer: A Comparative Study with [18F]Fluorodeoxyglucose and [18F]Fluoroethylcholine, Current Cancer Drug Targets 2014; 14 (4) . https://dx.doi.org/10.2174/1568009614666140403123452
DOI https://dx.doi.org/10.2174/1568009614666140403123452 |
Print ISSN 1568-0096 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-5576 |
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