A 18F‐Labeled Fluorobutyl‐Substituted Spirocyclic Piperidine Derivative as a Selective Radioligand for PET Imaging of Sigma1 Receptors
A 18F‐Labeled Fluorobutyl‐Substituted Spirocyclic Piperidine Derivative as a Selective Radioligand for PET Imaging of Sigma1 Receptors
复制标题
18F 标记的氟丁基取代的螺环哌啶衍生物作为 Sigma1 受体 PET 成像的选择性放射性配体
作者:
Aurélie Maisonial;Eva Große Maestrup;S. Fischer;A. Hiller;M. Scheunemann;C. Wiese;D. Schepmann;J. Steinbach;W. Deuther;B. Wünsch;P. Brust
In this study, we synthesized and evaluated a new spirocyclic piperidine derivative 3, containing a 4‐fluorobutyl side chain, as a PET radioligand for neuroimaging of σ1 receptors. In vitro, compound 3 displayed high affinity for σ1 receptors (Ki=1.2 nM) as well as high selectivity. [18F]3 radiosynthesis was performed from the corresponding tosylate precursor, with high radiochemical yield (45–51 %), purity (>98 %), and specific activity (>201 GBq μmol−1). Metabolic stability of [18F]3 in the brain of CD‐1 mice was verified, and no penetration of peripheral radiometabolites into the cerebral tissue was observed. Results of ex vivo autoradiography revealed that the distribution of [18F]3 in the brain corresponded to regions with high σ1 receptor density. The highest region‐specific total‐to‐nonspecific ratio was determined in the facial nucleus (4.00). Biodistribution studies indicated rapid and high levels in brain uptake of [18F]3 (2.2 % ID per gram at 5 min p.i.). Pre‐administration of haloperidol significantly inhibited [18F]3 uptake into the brain and σ1 receptor‐expressing organs, further confirming in vivo target specificity.
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影响因子:
13.8
作者:
Su TP;Hayashi T;Maurice T;Buch S;Ruoho AE
通讯作者:
Ruoho AE
DOI:
10.1006/bbrc.1996.1842
发表时间:
1996-12-13
影响因子:
3.1
作者:
Kekuda, R;Prasad, PD;Ganapathy, V
通讯作者:
Ganapathy, V
影响因子:
13.5
作者:
Fishback, James A.;Robson, Matthew J.;Xu, Yan-Tong;Matsumoto, Rae R.
通讯作者:
Matsumoto, Rae R.
影响因子:
13.5
作者:
Maurice T;Su TP
通讯作者:
Su TP
影响因子:
6.1
作者:
J. Musachio;U. Scheffel;M. Stathis;H. Ravert;W. B. Mathews;R. Dannals
通讯作者:
J. Musachio;U. Scheffel;M. Stathis;H. Ravert;W. B. Mathews;R. Dannals