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- W2013162012 abstract "Radiopharmaceuticals that can bind selectively the kappa-opioid receptor may present opportunities for staging clinical brain disorders and evaluating the efficiency of new therapies related to stroke, neurodegenerative diseases or opiate addiction. The N-methylated derivative of JDTic (named MeJDTic), which has been recently described as a potent and selective antagonist of kappa-opioid receptor in vitro, was labeled with carbon-11 and evaluated for in vivo imaging the kappa-opioid receptor in mice.[(11)C]-MeJDTic was prepared by methylation of JDTic with [(11)C]-methyl triflate. The binding of [(11)C]-MeJDTic to kappa-opioid receptor was investigated ex vivo by biodistribution and competition studies using nonfasted male CD1 mice.[(11)C]-MeJDTic exhibited a high and rapid distribution in peripheral organs. The uptake was maximal in lung where the kappa receptor is largely expressed. [(11)C]-MeJDTic rapidly crossed the blood-brain barrier and accumulated in the brain regions of interest (hypothalamus). The parent ligand remained the major radioactive compound in brain during the experiment. Chase studies with U50,488 (a kappa referring agonist), morphine (a mu agonist) and naltrindole (a delta antagonist) demonstrated that this uptake was the result of specific binding to the kappa-opioid receptor.These findings suggested that [(11)C]-MeJDTic appeared to be a promising selective lead radioligand for kappa-opioid receptor PET imaging." @default.
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- W2013162012 date "2008-07-01" @default.
- W2013162012 modified "2023-10-17" @default.
- W2013162012 title "[11C]-MeJDTic: a novel radioligand for κ-opioid receptor positron emission tomography imaging" @default.
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- W2013162012 doi "https://doi.org/10.1016/j.nucmedbio.2008.02.010" @default.
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