New positron emission tomography (PET) radioligand for imaging σ-1 receptors in living subjects.

New positron emission tomography (PET) radioligand for imaging σ-1 receptors in living subjects.
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DOI:
10.1021/jm300371c
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发表时间:
2012-10-11
影响因子:
7.3
通讯作者:
Chin, Frederick T.
Chin, Frederick T.
中科院分区:
医学1区
文献类型:
--
作者:
James, Michelle L.;Shen, Bin;Zavaleta, Cristina L.;Nielsen, Carsten H.;Mesangeau, Christophe;Vuppala, Pradeep K.;Chan, Carmel;Avery, Bonnie A.;Fishback, James A.;Matsumoto, Rae R.;Gambhir, Sanjiv S.;McCurdy, Christopher R.;Chin, Frederick T.

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Sigma-1 receptor (S1R) radioligands have the potential to detect and monitor various neurological diseases. Herein we report the synthesis, radiofluorination and evaluation of a new S1R ligand 6-(3-fluoropropyl)-3-(2-(azepan-1-yl)ethyl)benzo[d]thiazol-2(3H)-one ([18F]FTC-146, [18F]13). [18F]13 was synthesized by nucleophilic fluorination, affording a product with >99% radiochemical purity (RCP) and specific activity (SA) of 2.6 ± 1.2 Ci/Amol (n = 13) at end of synthesis (EOS). Positron emission tomography (PET) and ex vivo autoradiography studies of [18F]13 in mice showed high uptake of the radioligand in S1R rich regions of the brain. Pre treatment with 1 mg/kg haloperidol (2), non radioactive 13, or BD1047 (18) reduced the binding of [18F]13 in the brain at 60 min by 80%, 82% and 81% respectively, suggesting that [18F]13 accumulation in mouse brain represents specific binding to S1Rs. These results indicate that [18F]13 is a promising candidate radiotracer for further evaluation as a tool for studying S1Rs in living subjects.
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