A new single-photon emission computed tomography (SPECT) imaging agent for serotonin transporters: [(125)I]Flip-IDAM, (2-((2-((dimethylamino)methyl)-4-iodophenyl)thio)phenyl)methanol.

A new single-photon emission computed tomography (SPECT) imaging agent for serotonin transporters: [(125)I]Flip-IDAM, (2-((2-((dimethylamino)methyl)-4-iodophenyl)thio)phenyl)methanol.
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一种用于血清素转运蛋白的新型单光子发射计算机断层扫描 (SPECT) 成像剂:[(125)I]Flip-IDAM,(2-((2-((二甲氨基)甲基)-4-碘苯基)硫基)苯基)甲醇

DOI:
10.1016/j.bmcl.2012.11.043
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发表时间:
2013
影响因子:
2.7
通讯作者:
Kung,HankF
Kung,HankF
中科院分区:
医学4区
文献类型:
--
作者:
Zheng,Pinguan;Lieberman,BrianP;Ploessl,Karl;Lemoine,Laetitia;Miller,Sara;Kung,HankF

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制备并评估了用于单光子发射断层扫描 (SPECT) 血清素转运蛋白 (SERT) 体内脑成像的新配体。联苯硫醇 FLIP-IDAM, 4 的有效合成和放射性标记已完成。使用[125I]-IDAM作为大鼠脑组织匀浆中的放射性配体,通过体外抑制性结合测定评估FLIP-IDAM的亲和力(Ki=0.03nM)。新的[125I]Flip-IDAM对SERT结合位点表现出优异的结合亲和力,在静脉注射后30分钟时下丘脑与小脑的比率高达4。大脑摄取的体内动力学更快,并且非特定区域的快速冲洗提供了出色的信噪比。这种新试剂,当用 123 I 标记时,可能是一种有用的显像剂,用于绘制人脑中 SERT 结合位点的图谱。
New ligands for in vivo brain imaging of serotonin transporter (SERT) with single photon emission tomography (SPECT) were prepared and evaluated. An efficient synthesis and radiolabeling of a biphenylthiol, FLIP-IDAM, 4, was accomplished. The affinity of FLIP-IDAM was evaluated by an in vitro inhibitory binding assay using [125I]-IDAM as radioligand in rat brain tissue homogenates (Ki=0.03nM). New [125I]Flip-IDAM exhibited excellent binding affinity to SERT binding sites with a high hypothalamus to cerebellum ratio of 4 at 30min post iv injection. The faster in vivo kinetics for brain uptake and a rapid washout from non-specific regions provide excellent signal to noise ratio. This new agent, when labeled with123I, may be a useful imaging agent for mapping SERT binding sites in the human brain.
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