[EN] COMPOUNDS FOR USE IN IMAGING, DIAGNOSING AND/OR TREATMENT OF DISEASES OF THE CENTRAL NERVOUS SYSTEM [FR] COMPOSÉ DESTINÉ À ÊTRE UTILISÉ EN IMAGERIE, DIAGNOSTIC ET/OU TRAITEMENT DE MALADIES DU SYSTÈME NERVEUX CENTRAL
[EN] COMPOUNDS FOR USE IN IMAGING, DIAGNOSING AND/OR TREATMENT OF DISEASES OF THE CENTRAL NERVOUS SYSTEM [FR] COMPOSÉ DESTINÉ À ÊTRE UTILISÉ EN IMAGERIE, DIAGNOSTIC ET/OU TRAITEMENT DE MALADIES DU SYSTÈME NERVEUX CENTRAL
[EN] COMPOUNDS FOR USE IN IMAGING, DIAGNOSING AND/OR TREATMENT OF DISEASES OF THE CENTRAL NERVOUS SYSTEM<br/>[FR] COMPOSÉ DESTINÉ À ÊTRE UTILISÉ EN IMAGERIE, DIAGNOSTIC ET/OU TRAITEMENT DE MALADIES DU SYSTÈME NERVEUX CENTRAL
申请人:PIRAMAL IMAGING SA
公开号:WO2012126913A1
公开(公告)日:2012-09-27
This invention relates to novel compounds suitable for labelling by 18F and the corresponding 18F labelled compounds themselves, 19F-fluorinated analogues thereof and their use as reference standards, methods of preparing such compounds, compositions comprising such compounds, kits comprising such compounds or compositions and uses of such compounds, compositions or kits for diagnostic imaging by Positron Emission Tomography (PET).
COMPOUNDS FOR USE IN IMAGING, DIAGNOSING AND/OR TREATMENT OF DISEASES OF THE CENTRAL NERVOUS SYSTEM
申请人:Thiele Andrea
公开号:US20140193338A1
公开(公告)日:2014-07-10
This invention relates to novel compounds suitable for labelling by
18
F and the corresponding
18
F labelled compounds themselves,
19
F-fluorinated analogues thereof and their use as reference standards, methods of preparing such compounds, compositions comprising such compounds, kits comprising such compounds or compositions and uses of such compounds, compositions or kits for diagnostic imaging by Positron Emission Tomography (PET).
Development of a novel fluorine-18 labeled deuterated fluororasagiline ([18F]fluororasagiline-D2) radioligand for PET studies of monoamino oxidase B (MAO-B)
The objective of this study was to synthesize and evaluate a novel fluorine-18 labeled deuterium substituted analogue of rasagiline (9, [F-18]fluororasagiline-D-2) as a potential PET radioligand for studies of monoamine oxidase B (MAO-B).The precursor compound (6) and reference standard (7) were synthesized in multi-step syntheses. Radiolabeling of 9 was accomplished by a two-step synthesis, compromising a nucleophilic substitution followed by hydrolysis of the sulfamidate group. The incorporation radiochemical yield from fluorine-18 fluoride was higher than 30%, the radiochemical purity was >99% and the specific radioactivity was >160 GBq/mu mol at the time of administration.In vitro compound 7 inhibited the MAO-B activity with an IC50 of 173.0 +/- 13.6 nM. The MAO-A activity was inhibited with an IC50 of 9.9 +/- 1.1 mu M. The fluorine-18 version 9 was characterized in the cynomolgus monkey brain where a high brain uptake was found (275% SUV at 4 min). There was a higher uptake in the striatum and thalamus compared to the cortex and cerebellum. A pronounced blocking effect (50% decrease) was observed in the specific brain regions after administration of L-deprenyl (0.5 mg/kg) 30 min prior to the administration of 9. Radiometabolite studies demonstrated 40% of unchanged radioligand at 90 min post injection.An efficient radiolabeling of 9 was successfully established and in the monkey brain 9 binds to MAO-B rich regions and its binding is blocked by the selective MAO-B compound L-deprenyl. The radioligand 9 is a potential candidate for human PET studies. (C) 2013 Elsevier Ltd. All rights reserved.