Racemic mixtures and individual enantiomers of fluorine-18 or carbon-11 radio-labelled 2′-alkyl-6-nitroquipazine ligands are serotonin transporter (SERT) tracers for positron emission tomography (PET) imaging. The non-radioactive ligand forms possess therapeutic antidepressant in vitro and in vivo pharmacological binding profiles in rodent brain and cells expressing human serotonin transporter (hSERT). Twelve 2′-alkyl-6-nitroquipazine ligands potently bind in sub-nanomolar concentrations to the pre-synaptic SERT binding site where established antidepressant drugs bind and inhibit the re-uptake of the neurotransmitter serotonin (5-HT). In vivo tracer studies in rats as well as monkey PET scan trial have demonstrated the fluorine-18 and carbon-11 positron radionuclide labeled tracers perform as quantitative tracers of specific binding the SERT protein in live brain.
2'-烷基-6-硝基奎普嗪
配体的混合物和单一对映体,标记有
氟-18或碳-11放射性同位素,是
血清素转运体(
SERT)正电子发射断层扫描(PET)成像的示踪剂。非放射性
配体在啮齿动物大脑和表达人类
血清素转运体(h
SERT)的细胞中具有治疗性抗抑郁药物的体外和体内药理结合特性。12种2'-烷基-6-硝基奎普嗪
配体在亚纳摩尔浓度下强烈结合于前突触
SERT结合位点,这是已知抗抑郁药物结合并抑制神经递质
血清素(5-HT)再摄取的位置。在大鼠体内示踪剂研究以及猴PET扫描试验中,
氟-18和碳-11正电子放射性同位素标记的示踪剂表现为定量示踪剂,可在活体大脑中定位
SERT蛋白的特异性结合。