Quantification of Dopamine Active Transporter (DAT) in Humans: Validation of a New Radiophamaceutical, the [18F] LBT-999

Summary

Idiopathic Parkinson's disease (IPD) is a degenerative disease affecting the dopaminergic system. Clinical symptoms of IPD commonly begin after the loss of at least 40 to 50% of striatal dopaminergic terminals (specially putaminal terminals). The Dopamine neuronal transporter (DAT) is a highly expressed protein in the membrane of presynaptic nigrostriatal dopaminergic terminals. The use of a DAT's radioligand in the initial stages of the disease would lead to an early detection of nigral cell loss. Currently, only one DAT's radioligand has obtained marketing authorization in France, the 123I-FPCIT, for use in Single Photon Emission Computed Tomography (SPECT). Otherwise, the Positron Emission Tomography (PET), a more sensitive technology than SPECT with higher resolution has become for a few years the new gold standard for visual analysis and quantification of neurotransmission systems (including the dopaminergic system). A DAT tracer labelled with Carbon 11 (\[11C\] PE2l) have been developed and is currently used as a reference in various research centers. However, in order to enable a clinical use of this tracer (which currently can't be because of the too short period of Carbon 11), the unit INSERM U930 "Imaging and Brain" in collaboration with the CERRP (Center for Studies and Research on Radiopharmaceuticals) developed a new version of this tracer, labelled with 18-fluor: the \[18F\] LBT-999. The main goal of this study is to compare the \[18F\] LBT-999 uptake between a group of patients suffering from a Parkinsonien syndrome to a group healthy volunteers.

Timeline

Start

2015-03

Primary completion

2016-11

Completion

2017-05

Outcome

Outcome not reported

Stopped: “Enough inclusions for interpretation”

Publications

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• Background Hsiao IT, Weng YH, Lin WY, Hsieh CJ, Wey SP, Yen TC, Kung MP, Lu CS, Lin KJ. Comparison of 99mTc-TRODAT-1 SPECT and 18 F-AV-133 PET imaging in healthy controls and Parkinson's disease patients. Nucl Med Biol. 2014 Apr;41(4):322-9. doi: 10.1016/j.nucmedbio.2013.12.017. Epub 2014 Jan 10.
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• Background Schillaci O, Pierantozzi M, Filippi L, Manni C, Brusa L, Danieli R, Bernardi G, Simonetti G, Stanzione P. The effect of levodopa therapy on dopamine transporter SPECT imaging with( 123)I-FP-CIT in patients with Parkinson's disease. Eur J Nucl Med Mol Imaging. 2005 Dec;32(12):1452-6. doi: 10.1007/s00259-005-1922-9. Epub 2005 Sep 8.
• Background Sharma S, Moon CS, Khogali A, Haidous A, Chabenne A, Ojo C, Jelebinkov M, Kurdi Y, Ebadi M. Biomarkers in Parkinson's disease (recent update). Neurochem Int. 2013 Sep;63(3):201-29. doi: 10.1016/j.neuint.2013.06.005. Epub 2013 Jun 19.
• Background Snow BJ, Tooyama I, McGeer EG, Yamada T, Calne DB, Takahashi H, Kimura H. Human positron emission tomographic [18F]fluorodopa studies correlate with dopamine cell counts and levels. Ann Neurol. 1993 Sep;34(3):324-30. doi: 10.1002/ana.410340304.
• Background Varrone A, Stepanov V, Nakao R, Toth M, Gulyas B, Emond P, Deloye JB, Vercouillie J, Stabin MG, Jonsson C, Guilloteau D, Halldin C. Imaging of the striatal and extrastriatal dopamine transporter with (18)F-LBT-999: quantification, biodistribution, and radiation dosimetry in nonhuman primates. J Nucl Med. 2011 Aug;52(8):1313-21. doi: 10.2967/jnumed.111.089953. Epub 2011 Jul 15.

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